阅读说明：本技术 一种高强度合金碎粒锯片 (High-strength alloy particle saw blade ) 是由 蒋武峰 于 2021-06-27 设计创作，主要内容包括：本发明涉及一种高强度合金碎粒锯片,涉及切削加工的技术领域。本发明的高强度合金碎粒锯片,包括圆盘钢基体,圆盘钢基体外圆周上通过激光焊接固定有多个硬质合金碎粒刀头,硬质合金碎粒刀头包括刀头本体和位于刀头本体内侧其用于与所述圆盘钢基体结合的过渡层,过渡层的原料组成为Fe:45-60wt.％,Mn:2-5wt.％,余量为铜和不可避免的杂质。本发明的高强度合金碎粒锯片中圆盘基体与合金碎粒刀头的焊接强度高,保证了制备工艺的高合格率；并且所述锯片切割性能更稳定、使用寿命更长,简单实用,尤其适用于沥青路面的剥离,操作安全性好。(The invention relates to a high-strength alloy particle saw blade, and relates to the technical field of cutting processing. The high-strength alloy particle saw blade comprises a disc steel matrix, wherein a plurality of hard alloy particle cutter heads are fixed on the outer circumference of the disc steel matrix through laser welding, each hard alloy particle cutter head comprises a cutter head body and a transition layer which is positioned on the inner side of the cutter head body and used for being combined with the disc steel matrix, the transition layer comprises 45-60 wt% of Fe, 2-5 wt% of Mn and the balance of copper and inevitable impurities. The welding strength of the disc matrix and the alloy particle cutter head in the high-strength alloy particle saw blade is high, so that the high qualified rate of the preparation process is ensured; and the saw blade has more stable cutting performance, longer service life, simplicity, practicability, good operation safety and is particularly suitable for stripping of asphalt pavements.)

1. The utility model provides a high strength alloy particle saw bit, includes disc steel substrate, its characterized in that: the hard alloy particle cutting head comprises a cutting head body and a transition layer which is positioned on the inner side of the cutting head body and is used for being combined with the disc steel base body, wherein the transition layer is made of 45-60 wt% of Fe, 2-5 wt% of Mn and the balance of copper and inevitable impurities.

2. The high strength alloy granulated saw blade according to claim 1, wherein: the content of C in the raw material composition of the transition layer is <0.10 wt.%.

3. The high strength alloy granulated saw blade according to claim 1, wherein: the thickness of the transition layer is 1.0-2.0 mm.

4. The high strength alloy granulated saw blade according to claim 1, wherein: the hard alloy particle cutter head is processed into a blank through cold pressing, and is formed through hot-pressing sintering, wherein the hot-pressing sintering temperature is 960-1050 ℃, and the pressure is 270-330 kg/cm²(ii) a The hot-pressing sintering temperature is preferably 1000 ℃, and the pressure is preferably 310kg/cm²(ii) a The hot-pressing heat preservation time is preferably 3-10 min.

5. The high strength alloy granulated saw blade according to claim 1, wherein: the cutter head body comprises the following raw materials: 15-35 wt.% copper, 20-45 wt.% iron, 3-8 wt.% nickel, 3-9 wt.% tin, 2-12 wt.% zinc, 2-10 wt.% manganese, 10-20 wt.% tungsten carbide, 0.1-1% liquid paraffin, 1-2.1 wt.% cemented carbide granules; preferably, copper 17-32 wt.%, iron 25-42 wt.%, nickel 4-6 wt.%, tin 4-5 wt.%, zinc 4-11 wt.%, manganese 3-7 wt.%, tungsten carbide 11-19 wt.%, liquid paraffin 0.3-0.8 wt.%, cemented carbide granules 1.3-1.9 wt.%; more preferably, copper 17-24 wt.%, iron 35-42 wt.%, nickel 4-6 wt.%, tin 4-5 wt.%, zinc 4-9 wt.%, manganese 3-6 wt.%, tungsten carbide 11-15 wt.%, liquid paraffin 0.3-0.8 wt.%, cemented carbide granules 1.1-1.5 wt.%.

6. The high strength alloy granulated saw blade according to claim 1, wherein: the transition layer comprises 45-55 wt% of Fe, 2-4 wt% of Mn and the balance of copper and inevitable impurities.

7. The high strength alloy granulated saw blade according to claim 1, wherein: the thickness of the disc steel matrix is 0.5-4.0 mm, the thickness of the hard alloy particle cutter head is larger than that of the disc steel matrix, and the thickness of the hard alloy particle cutter head is 1.2-2.0 times, preferably 1.3-1.6 times of that of the disc steel matrix.

8. The high strength alloy granulated saw blade according to claim 1, wherein: the hard alloy particles are LG8, the components of the hard alloy particles are 92 wt% of WC, 6 wt% of Co and 2 wt% of Ni, and the particle size is 250-425 micrometers.

9. The method for producing a high-strength alloy granulated saw blade as set forth in any of claims 1 to 8, characterized by comprising the steps of:

1. processing a matrix:

cutting a disc steel substrate by laser, and then polishing and flattening;

2. preparing a hard alloy particle cutter head:

uniformly mixing the raw materials of the cutter head body in proportion, drying, weighing the raw materials, filling the raw materials into a mold, and performing cold press molding; uniformly mixing the transition layer raw materials, and then performing cold press molding, wherein the transition layer raw materials comprise 45-60 wt.% of iron, 2-5 wt.% of manganese, and the balance of copper and inevitable impurities; arranging a transition layer with the thickness of 1-2mm on the inner side of the cold-pressed and molded cutter head body, connecting the cutter head body and the transition layer together through hot-pressing sintering, and grinding the cutter head body and the transition layer through a grinding wheel abrasive belt to manufacture the hard alloy particle cutter head;

3. laser welding:

arranging the hard alloy particle cutter head on the corresponding position around the disc steel matrix, adjusting the light spot of a laser welding machine to the proper position of the cutter head and the disc steel matrix, and starting the laser welding machine for welding to enable the hard alloy particle cutter head and the disc steel matrix to be welded together;

4. polishing, painting and inspecting:

and then, grinding the working surface of the carbide alloy particle cutter head by using a grinding wheel, grinding the surface of the disc steel substrate by using a grinding machine, then performing surface painting and drying, finally performing welding strength detection on each alloy cutter head, and printing, packaging and warehousing after the welding strength is qualified.

10. Use of the high strength alloy granulated saw blade as set forth in any of claims 1 to 8, wherein: the method is used for stripping the asphalt pavement.

Technical Field

The invention relates to the technical field of cutting processing, in particular to a high-strength alloy particle saw blade.

Background

Alloy particle saw blades taking hard alloy particles as hard cutting phases have been developed and applied to the market, but the application fields of the alloy particle saw blades are mainly limited to cutting, polishing and other processing of materials with lower hardness, such as wood, plastic, plastics and the like; if the alloy particle saw blade is applied to processing of high-hardness materials such as concrete, cement and the like, the hard alloy particles are often cracked, fall off and fly out, the service life of the alloy particle saw blade is shortened, and the safety of surrounding personnel is easily threatened during processing. In addition, in the prior art, in order to ensure the cohesiveness between the matrix material and the hard alloy particles in the hard alloy particle saw blade, the content of Ni in the matrix metal powder is generally high, and even the Ni-based matrix metal powder is adopted, so that the cost is obviously increased; meanwhile, in order to ensure the bonding strength of the hard alloy particle cutter head and the disc matrix, the hard alloy particle cutter head blank and the disc matrix are integrally formed by vacuum brazing, so that the production efficiency is low.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention aims to provide a high-strength alloy particle saw blade.

The invention relates to a high-strength alloy particle saw blade, which comprises a disk steel substrate and is characterized in that: the hard alloy particle cutting head comprises a cutting head body and a transition layer which is positioned on the inner side of the cutting head body and is used for being combined with the disc steel base body, wherein the transition layer is made of 45-60 wt% of Fe, 2-5 wt% of Mn and the balance of copper and inevitable impurities.

Wherein the content of C in the raw material composition of the transition layer is <0.10 wt.%.

Wherein the thickness of the transition layer is 1.0-2.0 mm.

The hard alloy particle cutter head is processed into a blank through cold pressing, and is formed through hot-pressing sintering, wherein the hot-pressing sintering temperature is 960-1050 ℃, and the pressure is 270-330 kg/cm²(ii) a The hot-pressing sintering temperature is preferably 1000 ℃, and the pressure is preferably 310kg/cm²(ii) a The hot-pressing heat preservation time is preferably 3-10 min.

Wherein, the raw materials composition of tool bit body is: 15-35 wt.% copper, 20-45 wt.% iron, 3-8 wt.% nickel, 3-9 wt.% tin, 2-12 wt.% zinc, 2-10 wt.% manganese, 10-20 wt.% tungsten carbide, 0.1-1% liquid paraffin, 1-2.1 wt.% cemented carbide granules; preferably, copper 17-32 wt.%, iron 25-42 wt.%, nickel 4-6 wt.%, tin 4-5 wt.%, zinc 4-11 wt.%, manganese 3-7 wt.%, tungsten carbide 11-19 wt.%, liquid paraffin 0.3-0.8 wt.%, cemented carbide granules 1.3-1.9 wt.%; more preferably, copper 17-24 wt.%, iron 35-42 wt.%, nickel 4-6 wt.%, tin 4-5 wt.%, zinc 4-9 wt.%, manganese 3-6 wt.%, tungsten carbide 11-15 wt.%, liquid paraffin 0.3-0.8 wt.%, cemented carbide granules 1.1-1.5 wt.%.

Wherein, the transition layer comprises 45-55 wt% of Fe, 2-4 wt% of Mn and the balance of copper and inevitable impurities.

The thickness of the disc steel matrix is 0.5-4.0 mm, the thickness of the hard alloy particle cutter head is larger than that of the disc steel matrix, and the thickness of the hard alloy particle cutter head is 1.2-2.0 times, preferably 1.3-1.6 times that of the disc steel matrix.

Wherein the hard alloy particles are LG8, the components of the hard alloy particles are 92 wt% WC +6 wt% Co +2 wt% Ni, and the particle size is 250-425 mu m.

The second aspect of the present invention also relates to a method for manufacturing the above-mentioned high-strength alloy granulated saw blade, which is characterized by comprising the steps of:

4. processing a matrix:

cutting a disc steel substrate by laser, and then polishing and flattening;

5. preparing a hard alloy particle cutter head:

uniformly mixing the raw materials of the cutter head body in proportion, drying, weighing the raw materials, filling the raw materials into a mold, and performing cold press molding; uniformly mixing the transition layer raw materials, and then performing cold press molding, wherein the transition layer raw materials comprise 45-60 wt.% of iron, 2-5 wt.% of manganese, and the balance of copper and inevitable impurities; arranging a transition layer with the thickness of 1-2mm on the inner side of the cold-pressed and molded cutter head body, connecting the cutter head body and the transition layer together through hot-pressing sintering, and grinding the cutter head body and the transition layer through a grinding wheel abrasive belt to manufacture the hard alloy particle cutter head;

6. laser welding:

arranging the hard alloy particle cutter head on the corresponding position around the disc steel matrix, adjusting the light spot of a laser welding machine to the proper position of the cutter head and the disc steel matrix, and starting the laser welding machine for welding to enable the hard alloy particle cutter head and the disc steel matrix to be welded together;

4. polishing, painting and inspecting:

and then, grinding the working surface of the carbide alloy particle cutter head by using a grinding wheel, grinding the surface of the disc steel substrate by using a grinding machine, then performing surface painting and drying, finally performing welding strength detection on each alloy cutter head, and printing, packaging and warehousing after the welding strength is qualified.

Compared with the prior art, the high-strength alloy particle saw blade has the following beneficial effects:

(1) the welding strength of the disc matrix and the alloy particle cutter head is high, so that the high qualified rate of the preparation process is ensured;

(2) the thickness of the disc matrix is smaller than that of the alloy particle cutter head, so that the reduction of energy consumption is facilitated;

(3) the cutting performance is more stable, the service life is longer, the method is simple and practical, the method is particularly suitable for stripping the asphalt pavement, and the operation safety is good.

The third aspect of the present invention also relates to the use of the above high-strength alloy granulated saw blade, characterized by being used for the peeling of asphalt pavement; wherein the diameter of the disc steel substrate is 100-200 mm.

Drawings

Fig. 1 is a schematic plan view of a high strength alloy granulated saw blade according to the present invention.

FIG. 2 is a schematic sectional view of the high strength alloy granulated saw blade of the present invention.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, the high-strength alloy particle piece of the present invention includes a disc substrate 1, a plurality of alloy tool bits 2 are fixedly connected to an outer circumference of the disc substrate 1, a plurality of chip discharge slots 4 are uniformly formed in a circumferential surface of the disc substrate 1 in a radial direction, the plurality of chip discharge slots 4 are respectively located between every two alloy tool bits 2, and a mounting hole 3 is formed in a middle position of the disc substrate 1.

In the invention, the alloy cutter head 2 comprises the following raw materials in percentage by weight: 15-35% of copper, 20-45% of iron, 3-8% of nickel, 3-9% of tin, 2-12% of zinc, 2-10% of manganese, 10-20% of tungsten carbide, 0.1-1% of liquid paraffin and 1-2.1% of hard alloy particles. In the alloy cutter head raw material, the content of nickel is lower, but the invention can ensure densification sintering under the condition of hot-pressing sintering and can ensure infiltration and bonding of hard alloy particles by preparing a proper amount of zinc, manganese and tin in a copper matrix and sintering together, so that the collapse and the ejection of the hard alloy particles during processing can be greatly reduced, and the safety of personnel can be ensured; the addition of the tungsten carbide can ensure that the hardness of the alloy matrix is matched with that of a hard material to be processed, such as an asphalt pavement, so that the processing efficiency is improved, and the service life is prolonged.

Preferably, the alloy tool bit 2 preferably comprises the following raw materials in percentage by weight: 17-32% of copper, 25-42% of iron, 4-6% of nickel, 4-5% of tin, 4-11% of zinc, 3-7% of manganese, 13-19% of tungsten carbide, 0.3-0.8% of liquid paraffin and 1.3-1.9% of hard alloy particles.

In the present invention, the alloy tip 2 is laser welded to the outer diameter of the disc base 1. In the drawing, the number of the plurality of flutes 4 is 10, the bottom of each flute 4 is circular, and the opening is U-shaped. The diameter of the disc base body 1 is 100-200 mm, the thickness of the disc base body 1 is 0.5-4.0 mm, the thickness of the alloy cutter head is preferably larger than that of the disc base body 1, the thickness of the alloy cutter head can be 1.2-2.0 times, for example, 1.3-1.6 times, of the thickness of the disc base body 1, the thickness of the alloy cutter head is set to be larger than that of the disc base body 1, the thickness of the disc base body can be reduced, and energy consumption during processing can be reduced. The inner diameter of the bottom of the chip groove 4 is 5mm-6mm, and the inner diameter of the opening part of the chip groove 4 is 3mm-4 mm. The alloy tips 2 are each identical in size and shape, and the outer edge curvature of each alloy tip 2 is identical to that of the disc base body 1. The material of the disc base body 1 is carbon steel, such as 65 manganese. In order to ensure the bending strength of the alloy particle cutter head and the disc base body during laser welding, a transition layer is arranged on the inner side of the alloy cutter head 2, the thickness of the transition layer is 1.0-2.0 mm, the raw materials of the transition layer comprise 45-60 wt% of iron, 2-5 wt% of manganese and the balance of copper and inevitable impurities. In the invention, the quality of a welding seam of laser welding is ensured by adding manganese, and when the addition of manganese is less than 2 wt.%, pores are easily generated, so that the compactness is insufficient; whereas if the manganese is added in an amount exceeding 5 wt.%, it may cause the formation of brittle phases, resulting in a decrease in strength; since the iron material generally contains carbon, the carbon content of the transition layer should be less than 0.10 wt.% in the material, which would otherwise result in a significant reduction in bending strength.

In the present invention, the composition of the cemented carbide granules in the alloy insert 2 is LG8, and the particle size of the commercially available LG8 (composition of 92 wt% WC +6 wt% Co +2 wt% Ni) is 250 to 425 μm.

The preparation process of the high-strength alloy fragment piece comprises the following steps:

7. processing a matrix:

according to the requirements of a drawing, the disc substrate 1 is cut by laser, and then polished to be flat;

8. preparing an alloy tool bit 2:

uniformly mixing the raw materials of the alloy cutter head in proportion, drying the raw materials, weighing the raw materials after drying, weighing, die-filling the raw materials, and then carrying out cold press molding; uniformly mixing the transition layer raw materials, and then performing cold press molding, wherein the transition layer raw materials comprise 45-60 wt.% of iron, 2-5 wt.% of manganese, and the balance of copper; arranging a transition layer with the thickness of 1-2mm on the inner side of the alloy cutter head subjected to cold press molding, connecting the alloy cutter head and the transition layer together through hot press sintering, and grinding the alloy cutter head and the transition layer through a grinding wheel abrasive belt to manufacture the alloy cutter head with the transition layer, wherein the sintering temperature of the hot press sintering is 960-1050 ℃, and the pressure is 270-330 kg/cm²(ii) a Preferably 1000 ℃ and a pressure of 310kg/cm²Keeping the temperature for 3 minutes;

3. laser welding:

placing an alloy cutter head 2 on a corresponding position around a disc base body 1 according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the cutter head and the base body are suitable, and starting the laser welding machine for welding to enable the cutter head and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: performing double-sided laser welding by adopting a laser, wherein the welding temperature is 800 ℃, the diameter of a laser spot is 0.3mm, the laser power is 700- & lt730W, and the welding speed is 10-16 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.2-1.8mm, the laser beam deflects to one side of the substrate, the offset is 0.2-0.4mm, the laser incident angle is 12-14 degrees, the weld width is 1-1.3mm, and the penetration depth is 2-2.4 mm;

4. polishing, painting and inspecting:

and then, polishing the working surface of the alloy tool bit 2 by using a grinding wheel, polishing the surface brightness of the disc matrix 1 by using a polishing machine, then performing surface painting and drying to prevent the surface from rusting, finally performing welding strength detection on each alloy tool bit, and printing, packaging and warehousing after the alloy tool bit is qualified.

Example 1

The manufacturing process of the high-strength alloy granulated saw blade of the present example was as follows:

1. processing a matrix: according to the requirements of a drawing, a round substrate 1 is cut by laser, and then is polished to be flat;

2. preparing an alloy tool bit 2: 2.3kg of copper powder, 3.55kg of iron, 0.64kg of nickel, 0.84kg of zinc, 0.72kg of tin, 0.6kg of manganese and 1.1kg of tungsten carbide are taken, put into a mixing barrel and mixed for 30 minutes, 0.1kg of liquid paraffin and 0.15kg of hard alloy particles are added and mixed for 3 hours, and then the powder is poured into a mold for cold pressing and molding;

the transition layer is made of raw materials of Fe50 wt%, Mn4 wt% and the balance of Cu, the content of C in the raw materials is less than 0.10 wt%, and the raw materials of the transition layer are uniformly mixed and then subjected to cold press molding;

arranging a transition layer with the thickness of 1.5mm on the inner side of the alloy cutter head subjected to cold press molding, connecting the alloy cutter head and the transition layer together through hot press sintering, and grinding the alloy cutter head and the transition layer through a grinding wheel abrasive belt to manufacture the alloy cutter head with the transition layer, wherein the sintering temperature of the hot press sintering is 1000 ℃, and the pressure is 310kg/cm²Keeping the temperature for 3 minutes;

3. laser welding: placing an alloy cutter head 2 on a corresponding position around a circular base body 1 according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the cutter head and the base body are suitable, and starting the laser welding machine for welding to enable the cutter head and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: performing double-sided laser welding by using a laser, wherein the diameter of a laser spot is 0.3mm, the laser power is 710W, and the welding speed is 12 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.3mm, the laser beam deflects to one side of the substrate, the offset is 0.2mm, the laser incident angle is 12 degrees, the width of a welding seam is 1.1mm, and the penetration depth is 2 mm;

4. polishing, painting and inspecting: and then, polishing the working surface of the alloy tool bit (2) by using a grinding wheel, polishing the surface brightness of the round base body (1) by using a polishing machine, then performing surface paint spraying and drying to prevent the surface from rusting, finally performing welding strength detection on each alloy tool bit, and printing, packaging and warehousing after the alloy tool bit is qualified.

Through detection, the bending strength of the laser welding line is 2245MPa and is greater than that of the base body, the base body is broken during the test, and the welding line is intact.

Example 2

The manufacturing process of the alloy scrap piece saw blade of the present example is as follows:

1. processing a matrix: according to the requirements of a drawing, a round substrate 1 is cut by laser, and then is polished to be flat;

2. preparing an alloy tool bit 2: 2.21kg of copper powder, 3.69kg of iron, 0.59kg of nickel, 0.86kg of zinc, 0.7kg of tin, 0.59kg of manganese and 1.11kg of tungsten carbide are taken, put into a mixing barrel and mixed for 30 minutes, 0.09kg of liquid paraffin and 0.16kg of hard alloy particles are added, mixed for 3 hours, and then the powder is poured into a mold for cold pressing and molding;

the transition layer is made of raw materials of Fe50 wt%, Mn3 wt% and the balance of Cu, the content of C in the raw materials is less than 0.10 wt%, and the raw materials of the transition layer are uniformly mixed and then subjected to cold press molding;

arranging a transition layer with the thickness of 1.5mm on the inner side of the alloy cutter head subjected to cold press molding, connecting the alloy cutter head and the transition layer together through hot press sintering, and grinding the alloy cutter head and the transition layer through a grinding wheel abrasive belt to manufacture the alloy cutter head with the transition layer, wherein the sintering temperature of the hot press sintering is 1000 ℃, the pressure is 310kg/cm2, and the heat preservation time is 3 minutes;

3. laser welding: placing an alloy cutter head 2 on a corresponding position around a circular base body 1 according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the cutter head and the base body are suitable, and starting the laser welding machine for welding to enable the cutter head and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: performing double-sided laser welding by using a laser, wherein the diameter of a laser spot is 0.3mm, the laser power is 720W, and the welding speed is 6 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.8mm, the laser beam deflects to one side of the substrate, the offset is 0.4mm, the laser incident angle is 14 degrees, the width of a welding seam is 1mm, and the penetration depth is 2.4 mm;

4. polishing, painting and inspecting: and then, polishing the working surface of the alloy tool bit 2 by using a grinding wheel, polishing the surface brightness of the round base body 1 by using a polishing machine, then performing surface painting and drying to prevent the surface from rusting, finally performing welding strength detection on each alloy tool bit, and printing, packaging and warehousing after the welding strength is qualified.

Through detection, the bending strength of the laser welding line is 2240MPa and is greater than that of the base body, the base body is broken during the test, and the welding line is intact.

Comparative example 1

The manufacturing process of the high-strength alloy granulated saw blade of this comparative example was as follows:

1. processing a matrix: according to the requirements of a drawing, a round substrate 1 is cut by laser, and then is polished to be flat;

2. preparing an alloy tool bit 2: 2.3kg of copper powder, 3.55kg of iron, 0.64kg of nickel, 0.84kg of zinc, 0.72kg of tin, 0.6kg of manganese and 1.1kg of tungsten carbide are taken, put into a mixing barrel and mixed for 30 minutes, 0.1kg of liquid paraffin and 0.15kg of hard alloy particles are added and mixed for 3 hours, and then the powder is poured into a mold for cold pressing and molding;

the transition layer is made of 50 wt% of low-carbon iron powder, 50 wt% of Mn4wt wt% and the balance of Cu, wherein the low-carbon iron powder contains low-carbon steel with the carbon content of 0.25 wt%, and the transition layer is formed by cold pressing after being uniformly mixed;

arranging a transition layer with the thickness of 1.5mm on the inner side of the alloy cutter head subjected to cold press molding, connecting the alloy cutter head and the transition layer together through hot press sintering, and grinding the alloy cutter head and the transition layer through a grinding wheel abrasive belt to manufacture the alloy cutter head with the transition layer, wherein the sintering temperature of the hot press sintering is 1000 ℃, and the pressure is 310kg/cm²Keeping the temperature for 3 minutes;

3. laser welding: placing an alloy cutter head 2 on a corresponding position around a circular base body 1 according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the cutter head and the base body are suitable, and starting the laser welding machine for welding to enable the cutter head and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: performing double-sided laser welding by using a laser, wherein the diameter of a laser spot is 0.3mm, the laser power is 710W, and the welding speed is 12 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.3mm, the laser beam deflects to one side of the substrate, the offset is 0.2mm, the laser incident angle is 12 degrees, the width of a welding seam is 1.1mm, and the penetration depth is 2 mm;

4. polishing, painting and inspecting: and then, polishing the working surface of the alloy tool bit (2) by using a grinding wheel, polishing the surface brightness of the round base body (1) by using a polishing machine, then performing surface paint spraying and drying to prevent the surface from rusting, finally performing welding strength detection on each alloy tool bit, and printing, packaging and warehousing after the alloy tool bit is qualified.

The bending strength of the laser welding seam is 960MPa through detection.

Comparative example 2

The manufacturing process of the alloy granulated saw blade of this comparative example was as follows:

1. processing a matrix: according to the requirements of a drawing, a round substrate 1 is cut by laser, and then is polished to be flat;

2. preparing an alloy tool bit 2: 2.21kg of copper powder, 3.69kg of iron, 0.59kg of nickel, 0.86kg of zinc, 0.7kg of tin, 0.59kg of manganese and 1.11kg of tungsten carbide are taken, put into a mixing barrel and mixed for 30 minutes, 0.09kg of liquid paraffin and 0.16kg of hard alloy particles are added, mixed for 3 hours, and then the powder is poured into a mold for cold pressing and molding;

the transition layer raw materials comprise Fe50 wt%, the balance of Cu, the content of C in the raw materials is less than 0.10 wt%, and the transition layer raw materials are uniformly mixed and then subjected to cold press molding;

arranging a transition layer with the thickness of 1.5mm on the inner side of the alloy cutter head subjected to cold press molding, connecting the alloy cutter head and the transition layer together through hot press sintering, and grinding the alloy cutter head and the transition layer through a grinding wheel abrasive belt to manufacture the alloy cutter head with the transition layer, wherein the sintering temperature of the hot press sintering is 1000 ℃, the pressure is 310kg/cm2, and the heat preservation time is 3 minutes;

3. laser welding: placing an alloy cutter head 2 on a corresponding position around a circular base body 1 according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the cutter head and the base body are suitable, and starting the laser welding machine for welding to enable the cutter head and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: performing double-sided laser welding by using a laser, wherein the diameter of a laser spot is 0.3mm, the laser power is 720W, and the welding speed is 6 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.8mm, the laser beam deflects to one side of the substrate, the offset is 0.4mm, the laser incident angle is 14 degrees, the width of a welding seam is 1mm, and the penetration depth is 2.4 mm;

4. polishing, painting and inspecting: and then, polishing the working surface of the alloy tool bit 2 by using a grinding wheel, polishing the surface brightness of the round base body 1 by using a polishing machine, then performing surface painting and drying to prevent the surface from rusting, finally performing welding strength detection on each alloy tool bit, and printing, packaging and warehousing after the welding strength is qualified.

The bending strength of the laser welding seam is 1050MPa through detection.

When the alloy particle saw blade prepared by the invention rotates, the hard alloy particle cutter head can directly grind the damaged part of the asphalt pavement off, and then asphalt pavement can be carried out again on the ground asphalt pavement, the alloy particle blade has higher strength, better stripping performance and more stable cutting performance on the asphalt pavement, and the falling and the collapse of hard alloy particles are obviously reduced, and the observation and statistics of the hard alloy particle saw blade with the diameter of a disc matrix being 200mm and the number of the alloy cutter heads being 20 show that when the alloy particle saw blade is used for operating the asphalt pavement: the probability of falling and caving out of hard alloy particles is less than 2/10 saw blades, which is greatly superior to Ni-based or alloy particle saw blades with high Ni content under the same specification condition, and the safety risk of operators is greatly reduced.

It is obvious to those skilled in the art that the specific embodiments are only exemplary descriptions of the present invention, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and various insubstantial modifications made by the method concept and technical scheme of the present invention are within the protection scope of the present invention.