阅读说明：本技术 一种锯切白铜铸锭棒合金锯片及其生产工艺 (Saw cutting cupronickel ingot casting bar alloy saw blade and production process thereof ) 是由 周向东 浦益龙 于 2020-08-06 设计创作，主要内容包括：本发明涉及一种锯切白铜铸锭棒合金锯片的生产制作工艺。本发明所述的BFe30-1-1白铜铸锭棒合金锯片的镶齿的成分组方：钼12~16%、钨3.2~4.9、铬5~9%、钒2.6~4.2%、镍3~5%、钛1.5~2.5%、铝0.3~1.8%、锰0.8~1.8%,余量为铁；碳(元素C)在该铜合金中的含量≤0.1%,杂质在该铜合金中含量≤0.25%；单位为重量百分数。本发明所述的锯片镶齿是以铁为基体的合金,耐锯切高温性能良好,强度高又不失柔韧性,抗铜镍锯切时的粘性好,可在锯切BFe30-1-1白铜铸锭棒时长期工作不崩齿,满足了锯切白铜棒的要求；并且制备工艺简单,易操作,成本低。(The invention relates to a production and manufacturing process for sawing a cupronickel ingot casting bar alloy saw blade. The insert tooth of the BFe30-1-1 cupronickel ingot casting bar alloy saw blade comprises the following components: 12-16% of molybdenum, 3.2-4.9% of tungsten, 5-9% of chromium, 2.6-4.2% of vanadium, 3-5% of nickel, 1.5-2.5% of titanium, 0.3-1.8% of aluminum, 0.8-1.8% of manganese and the balance of iron; the content of carbon (element C) in the copper alloy is less than or equal to 0.1 percent, and the content of impurities in the copper alloy is less than or equal to 0.25 percent; the units are weight percentages. The saw blade insert is made of iron alloy serving as a matrix, has good sawing resistance and high temperature resistance, is high in strength, does not lose flexibility, has good copper-nickel sawing resistance, can work for a long time without tooth breakage during sawing of BFe30-1-1 cupronickel ingot bars, and meets the requirement of sawing of cupronickel bars; and the preparation process is simple, the operation is easy, and the cost is low.)

1. A saw blade for sawing cupronickel ingot bars is characterized by comprising a disc matrix (10) and an insert (20),

the edge tooth part cutting edge of the disc base body (10) is provided with a fixing hole (11), and the disc base body (10) is assembled and matched with the insert (20) through assembling rivets (30) in the fixing hole (11) of the insert (20).

2. The alloy saw blade for sawing a cupronickel ingot bar as claimed in claim 1, wherein the insert (20) is inserted within a distance of 22 ± 1mm from the edge end of the teeth of the disc base (10), wherein the insert (20) has a width of 3.2 ± 0.2mm and a thickness of 2.8 ± 0.2 mm.

3. A production and manufacturing process for sawing a cupronickel ingot bar alloy saw blade is characterized by comprising the following steps:

(1) single furnace single preparation:

the materials are strictly proportioned according to the formula;

(2) smelting in a vacuum induction furnace;

(3) casting a nodular graphite ingot mold:

injecting the molten metal into a spherical ink ingot mould to form an ingot, and carrying out filtration casting with a heat-preservation riser;

(4) finally, the cast ingot is subjected to dead head and tail sawing, forging, flaw detection, metalworking, heat treatment forming and accurate grinding to reach the size, and the embedded teeth and the substrate are assembled on the disc substrate for use through assembling rivets through the fixing holes.

4. The production and manufacturing process for sawing the cupronickel ingot bar alloy saw blade as claimed in claim 3, wherein: the components and the formula of the inlaid teeth of the saw blade in the step (1) are as follows: 12-16% of molybdenum, 3.2-4.9% of tungsten, 5-9% of chromium, 2.6-4.2% of vanadium, 3-5% of nickel, 1.5-2.5% of titanium, 0.3-1.8% of aluminum, 0.8-1.8% of manganese and the balance of iron; the content of carbon in the copper alloy is less than or equal to 0.1 percent, and the content of impurities in the copper alloy is less than or equal to 0.25 percent; the units are weight percentages.

5. The production and manufacturing process for sawing the cupronickel ingot bar alloy saw blade as claimed in claim 3, wherein: the charging sequence of the smelting in the step (2) is as follows: gradually adding the materials into the crucible from the bottom to the top: 1/3 nickel, chromium, iron, and a small amount of carbon; 2/3 Nickel, chromium, iron and tungsten, molybdenum, manganese; adding into an intermediate feeding box: aluminum, titanium, vanadium; electrifying to start vacuum melting and melting materials, adding aluminum, titanium and vanadium into the crucible from the middle feeding box, and carrying out vacuum melting and refining to form molten metal.

6. The production and manufacturing process for sawing the cupronickel ingot bar alloy saw blade as claimed in claim 3, wherein: the vacuum degree in the vacuum induction furnace in the step (2) is 6.7 multiplied by 10 < -1 > MPa, and the vacuum smelting refining temperature is as follows: the refining time is 8-20 minutes at 1550-1630 ℃.

7. The production and manufacturing process for sawing the cupronickel ingot bar alloy saw blade as claimed in claim 3, wherein: in the step (3), the casting temperature is 1500-1550 ℃.

8. The production and manufacturing process for sawing the cupronickel ingot bar alloy saw blade as claimed in claim 3, wherein: in the step (4), the forging temperature is 1120 ℃ and the finish forging temperature is 980 ℃.

Technical Field

The invention relates to the technical field of saw blades, in particular to a production and manufacturing process for saw cutting a cupronickel ingot casting bar alloy saw blade.

Background

BFe30-1-1 cupronickel alloy pipe is an indispensable key material of a condenser, a cooler, a heat exchanger and the like, wherein the most key process is carried out during smelting, the sawing of a cupronickel ingot bar is a process after smelting, the existing cupronickel ingot bar sawing saw blade is a tooth-inlaid circular saw blade, generally a hard alloy saw blade, and because the BFe30-1-1 cupronickel ingot contains about 30% of nickel, about 70% of copper and a plurality of trace strengthening elements, the saw blade has poor flexibility and copper-nickel resistance, is easy to break teeth (1-3 teeth are broken after 20 times of sawing), has short service life (the teeth are required to be ground and repaired after 120 times of sawing), has high cost and has safety risk during tooth breaking.

Disclosure of Invention

The invention aims to overcome the defects and provides a saw cutting cupronickel ingot casting bar alloy saw blade, which adopts the following process steps:

a saw blade for sawing cupronickel ingot bars is characterized by comprising a disc matrix and inlaid teeth,

the edge tooth part cutting edge of the disc base body is provided with a fixing hole, and the disc base body and the insert tooth are assembled and matched through assembling rivets in the fixing hole.

Furthermore, the position 22 +/-1 mm away from the edge opening end of the disc matrix tooth part is embedded with an insert tooth, wherein the width of the insert tooth is 3.2 +/-0.2 mm, and the thickness of the insert tooth is 2.8 +/-0.2 mm.

A production and manufacturing process for sawing a cupronickel ingot bar alloy saw blade is characterized by comprising the following steps:

(1) single furnace single preparation: the materials are strictly proportioned according to the formula;

(2) smelting in a vacuum induction furnace:

the feeding sequence is as follows: gradually adding the materials into the crucible from the bottom to the top: 1/3 nickel, chromium, iron, and a small amount of carbon; 2/3 Nickel, chromium, iron and tungsten, molybdenum, manganese; adding into an intermediate feeding box: aluminum, titanium, vanadium; electrifying to start vacuum melting and melting materials, adding aluminum, titanium and vanadium into a crucible from an intermediate feeding box, and carrying out vacuum melting and refining to form molten metal;

(3) casting a nodular graphite ingot mold: the molten metal is injected into a spherical ink ingot mould to form an ingot, a heat-preservation riser is provided for filtration casting,

(4) finally, the cast ingot is subjected to dead head and tail sawing, forging, flaw detection, metalworking, heat treatment forming and accurate grinding to reach the size, and the embedded teeth and the substrate are assembled on the disc substrate for use through assembling rivets through the fixing holes.

Further, the composition of the inlaid teeth of the saw blade in the step (1) is as follows: 12-16% of molybdenum, 3.2-4.9% of tungsten, 5-9% of chromium, 2.6-4.2% of vanadium, 3-5% of nickel, 1.5-2.5% of titanium, 0.3-1.8% of aluminum, 0.8-1.8% of manganese and the balance of iron; the content of carbon in the copper alloy is less than or equal to 0.1 percent, and the content of impurities in the copper alloy is less than or equal to 0.25 percent; the units are weight percentages. Further, the vacuum degree in the vacuum induction furnace in the step (2) is 6.7 x 10 < -1 > MPa, and the vacuum melting refining temperature is as follows: 1550-1630 ℃, refining time of 8-20 minutes,

further, in the step (3), the casting temperature is 1500-1550 ℃,

further, in the step (4), the forging temperature is 1120 ℃ and the finish forging temperature is 980 ℃.

Compared with the prior art, the invention has the following advantages:

the saw blade insert is made of iron alloy serving as a matrix, has good sawing resistance and high temperature resistance, is high in strength, does not lose flexibility, has good copper-nickel sawing resistance, can work for a long time without tooth breakage during sawing of BFe30-1-1 cupronickel ingot bars, and meets the requirement of sawing of cupronickel bars; and the preparation process is simple, the operation is easy, and the cost is low.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A saw blade for sawing cupronickel ingot bars alloy, as shown in figures 1-2, comprises a disc matrix 10 and inserts 20,

the edge tooth part cutting edge of the disc base body 10 is provided with a fixing hole 11, and the inlaid tooth 20 realizes the assembly and matching of the disc base body and the inlaid tooth through assembling a rivet 30 in the fixing hole 11.

The insert 20 is embedded at a position 22 +/-1 mm away from the edge opening end of the tooth part of the disc base body 10, wherein the width of the insert 20 is 3.2 +/-0.2 mm, and the thickness of the insert 20 is 2.8 +/-0.2 mm.

A production and manufacturing process for sawing a cupronickel ingot bar alloy saw blade is characterized by comprising the following steps:

(1) single furnace single preparation: the materials are strictly proportioned according to the formula;

the inlaid teeth of the saw blade comprise the following components: 12-16% of molybdenum, 3.2-4.9% of tungsten, 5-9% of chromium, 2.6-4.2% of vanadium, 3-5% of nickel, 1.5-2.5% of titanium, 0.3-1.8% of aluminum, 0.8-1.8% of manganese and the balance of iron; the content of carbon (element C) in the copper alloy is less than or equal to 0.1 percent, and the content of impurities in the copper alloy is less than or equal to 0.25 percent; the unit is weight percentage;

(2) smelting in a vacuum induction furnace:

the feeding sequence is as follows: gradually adding the materials into the crucible from the bottom to the top: 1/3 nickel, chromium, iron, and a small amount of carbon; 2/3 Nickel, chromium, iron and tungsten, molybdenum, manganese; adding into an intermediate feeding box: aluminum, titanium, vanadium; electrifying to start vacuum melting and melting materials, adding aluminum, titanium and vanadium into a crucible from an intermediate feeding box, and carrying out vacuum melting and refining to form molten metal; the vacuum degree in the vacuum induction furnace is 6.7 multiplied by 10 < -1 > MPa, and the vacuum melting refining temperature is as follows: 1550-1630 ℃, refining time of 8-20 minutes,

(3) casting a nodular graphite ingot mold: injecting the molten metal into a spherical ink ingot mould to form an ingot, carrying out filtration casting with a heat-preservation riser at the casting temperature of 1500-1550 ℃,

(4) finally, the cast ingot is subjected to dead head and tail sawing, forging, flaw detection, metalworking, heat treatment forming and accurate grinding to reach the size, and the embedded teeth and the substrate are assembled on the disc substrate for use through assembling rivets through the fixing holes.

The initial forging temperature of forging is 1120 ℃, and the final forging temperature is 980 ℃).