阅读说明：本技术 一种激光熔覆预硬化的圆锥破碎机衬板及加工工艺 (Laser cladding pre-hardened cone crusher lining plate and processing technology ) 是由 周立涛 王爱华 王永杰 王海涛 方虎 范天昊 于 2021-09-21 设计创作，主要内容包括：本发明公开了一种激光熔覆预硬化的圆锥破碎机衬板及加工工艺,配方包括：打底层材料和耐磨层材料,工艺包括步骤一,衬板预处理；步骤二,烘干打底层粉末；步骤三,熔覆打底层；步骤四,配置耐磨层混合粉料；步骤五,熔覆耐磨层；本发明通过激光熔覆技术在高锰钢表面熔覆一层耐磨耐冲击的预硬化涂层,使得涂层表面先受到磨损,待表面磨损后,显著提升了高锰钢的基体表面硬度,提高了衬板的表面硬度和耐磨性,延长了衬板的寿命,该涂层设计有打底层和耐磨层,打底层选用硬度较低,韧性较好的材料,有效抑制基材铸造缺陷上浮,而且增加涂层的耐冲击性,耐磨层选用硬度较高,含有硬质相的元素,起到提高耐磨性的作用。(The invention discloses a laser cladding pre-hardened cone crusher lining plate and a processing technology thereof, and the formula comprises: priming a bottom layer material and a wear-resistant layer material, wherein the process comprises the first step of preprocessing a lining plate; step two, drying the bottom layer powder; cladding a bottom coating; step four, preparing mixed powder of the wear-resistant layer; step five, cladding a wear-resistant layer; according to the invention, a wear-resistant and impact-resistant pre-hardened coating is cladded on the surface of the high manganese steel by a laser cladding technology, so that the surface of the coating is worn firstly, after the surface is worn, the surface hardness of a high manganese steel substrate is obviously improved, the surface hardness and the wear resistance of the lining plate are improved, and the service life of the lining plate is prolonged.)

1. A laser cladding pre-hardened cone crusher lining plate comprises the following formula: priming coat material and wearing layer material, priming coat material characterized in that: the priming layer material comprises the following components in percentage by mass: 0.01-0.05% of C, 16-19% of Cr, 10-14% of Ni, 1-3.5% of Mo, 0.2-0.8% of Ti, 0.1-0.4% of Nb and 0.1-0.3% of Si, and the balance of Fe.

2. The laser clad pre-hardened cone crusher liner plate of claim 1, wherein: the wear-resistant layer material is of three types A1, A2 and A3, and the A1 type wear-resistant layer material comprises the following components in percentage by mass: 0.6-1.0% of C, 13-18% of Cr, 2-8% of W, 1-4% of Mo, 0.2-1.3% of Ti and 0.1-0.4% of Nb, and the balance of Fe; the A2 type wear-resistant layer material comprises the following components in percentage by mass: 0.6-0.8% of C, 13-18% of Cr, 4-6% of Si, 1-5% of Fe, 0.2-1.0% of B, 0.2-1.3% of Ti, 0.1-0.4% of Nb, and the balance of Ni and WC according to the weight ratio of 1: mixing at a ratio of 0.4-0.6; the A3 type wear-resistant layer material comprises the following components in percentage by mass: 0.6-0.8% C, 13-18% Cr, 4-6% Si, 1-5% Fe, 0.2-1.0% B, 0.2-1.3% Ti, 0.1-0.4% Nb, the remainder being Ni and Co (Ni) WC in the ratio of 1: mixing at a ratio of 0.15-0.4.

3. A processing technology of a laser cladding pre-hardened cone crusher lining plate comprises the steps of firstly, preprocessing the lining plate; step two, drying the bottom layer powder; cladding a bottom coating; step four, preparing mixed powder of the wear-resistant layer; step five, cladding a wear-resistant layer; the method is characterized in that:

in the first step, the lining plate is installed on corresponding equipment, the position needing cladding is polished, oxides, paint and coatings are removed, and fresh metal which is uniform and continuous is leaked out of the position to be clad;

in the second step, the raw materials are weighed according to the proportion of the bottom layer material by taking the sum of the mass percentages as 1, and the bottom layer powder is obtained after sintering and crushing;

in the third step, the powder of the bottom layer prepared in the second step is put into a powder feeder, and the bottom layer is cladded at the position to be cladded and treated in the first step;

in the fourth step, the raw materials are weighed according to the material ratio of the wear-resistant layer, and the weighed raw materials are uniformly mixed by using a mixer to obtain wear-resistant layer mixed powder, wherein the sum of the mass percentages is 1;

and in the fifth step, the wear-resistant layer mixed powder prepared in the fourth step is put into a powder feeder, cladding is immediately started within half an hour after the third step is finished, a wear-resistant layer is prepared, and the wear-resistant layer is cooled to room temperature according to a specified cooling mode to obtain a finished workpiece.

4. The process for machining the laser cladding pre-hardened cone crusher lining plate according to claim 3, wherein the process comprises the following steps: in the first step, the lining plate comprises a fixed cone and a movable cone.

5. The process for machining the laser cladding pre-hardened cone crusher lining plate according to claim 3, wherein the process comprises the following steps: in the third step, the cladding laser spot is 3-5mm, the power is 4-6KW, the powder feeding is 3-8r/min, and the linear speed is 80-150 mm/s.

6. The process for machining the laser cladding pre-hardened cone crusher lining plate according to claim 3, wherein the process comprises the following steps: in the third step, the cladding thickness of the bottom coating is 0.8mm-1 mm.

7. The process for machining the laser cladding pre-hardened cone crusher lining plate according to claim 3, wherein the process comprises the following steps: in the fifth step, when the A1 type wear-resistant layer is prepared, a cladding laser spot is 3-5mm, the power is 3-5KW, the powder feeding is 3-5r/min, and the linear speed is 15-45 mm/s; when the A2 type wear-resistant layer is prepared, a workpiece is heated to 500 ℃ by using oxyacetylene or liquefied gas, the temperature is kept for half an hour, a cladding laser spot is 3-5mm, the power is 3-5KW, the powder feeding is 3-5r/min, the linear speed is 10-40mm/s, the cladding is finished by using an asbestos net, and the workpiece is slowly cooled to the room temperature; when the A3 type wear-resistant layer is prepared, a workpiece is heated to 300-500 ℃ by using oxyacetylene or liquefied gas, the temperature is kept for half an hour, a cladding laser spot is 3-5mm, the power is 3-5KW, the powder feeding is 3-5r/min, the linear speed is 10-40mm/s, the cladding is finished by using an asbestos net, and the workpiece is slowly cooled to the room temperature.

8. The process for machining the laser cladding pre-hardened cone crusher lining plate according to claim 3, wherein the process comprises the following steps: in the fifth step, the cladding thickness of the wear-resistant layer is 1.5mm-3 mm.

Technical Field

The invention relates to the technical field of cone crushers, in particular to a laser cladding pre-hardened cone crusher lining plate and a processing technology thereof.

Background

The cone crusher is one apparatus for crushing ore, and the lining board of the cone crusher is the main part and consists of movable cone and fixed cone, and the cone crusher adopts the principle of laminated crushing, and has material inside the crushing cavity in multilayer distribution and shaft line of the crusher driven by the eccentric shaft sleeve to make the movable cone approach to and separate from the surface of the fixed cone The lining plate is too long in replacement period, the labor intensity of workers is increased, the normal production progress is seriously influenced, the existing lining plate is mostly made of high manganese steel, the high manganese steel has higher toughness, and can also have high hardness and high wear resistance, the lining plate is made of more materials for the existing cone crusher, the surface of the high manganese steel is induced to form a martensite structure through deformation in the service process, the hardness of the surface is obviously improved, however, a new product is not subjected to work hardening, the hardness is lower, the wear resistance is not realized, accelerated wear can be caused in the use process, and therefore, the pre-hardening treatment on the surface of the high manganese steel is very necessary.

Disclosure of Invention

The invention aims to provide a laser cladding pre-hardened cone crusher lining plate and a processing technology thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a laser cladding pre-hardened cone crusher lining plate comprises the following formula: the primer layer material and the wear-resistant layer material comprise the following components in percentage by mass: 0.01-0.05% of C, 16-19% of Cr, 10-14% of Ni, 1-3.5% of Mo, 0.2-0.8% of Ti, 0.1-0.4% of Nb and 0.1-0.3% of Si, and the balance of Fe.

Preferably, the wear-resistant layer material has three types of A1, A2 and A3, and the A1 type wear-resistant layer material comprises the following components in percentage by mass: 0.6-1.0% of C, 13-18% of Cr, 2-8% of W, 1-4% of Mo, 0.2-1.3% of Ti and 0.1-0.4% of Nb, and the balance of Fe; the A2 type wear-resistant layer material comprises the following components in percentage by mass: 0.6-0.8% of C, 13-18% of Cr, 4-6% of Si, 1-5% of Fe, 0.2-1.0% of B, 0.2-1.3% of Ti, 0.1-0.4% of Nb, and the balance of Ni and WC according to the weight ratio of 1: mixing at a ratio of 0.4-0.6; the A3 type wear-resistant layer material comprises the following components in percentage by mass: 0.6-0.8% C, 13-18% Cr, 4-6% Si, 1-5% Fe, 0.2-1.0% B, 0.2-1.3% Ti, 0.1-0.4% Nb, the remainder being Ni and Co (Ni) WC in the ratio of 1: mixing at a ratio of 0.15-0.4.

A processing technology of a laser cladding pre-hardened cone crusher lining plate comprises the steps of firstly, preprocessing the lining plate; step two, drying the bottom layer powder; cladding a bottom coating; step four, preparing mixed powder of the wear-resistant layer; step five, cladding a wear-resistant layer;

in the first step, the lining plate is installed on corresponding equipment, the position needing cladding is polished, oxides, paint and coatings are removed, and fresh metal which is uniform and continuous is leaked out of the position to be clad;

in the second step, the raw materials are weighed according to the proportion of the bottom layer material by taking the sum of the mass percentages as 1, and the bottom layer powder is obtained after sintering and crushing;

in the third step, the powder of the bottom layer prepared in the second step is put into a powder feeder, and the bottom layer is cladded at the position to be cladded and treated in the first step;

in the fourth step, the raw materials are weighed according to the material ratio of the wear-resistant layer, and the weighed raw materials are uniformly mixed by using a mixer to obtain wear-resistant layer mixed powder, wherein the sum of the mass percentages is 1;

and in the fifth step, the wear-resistant layer mixed powder prepared in the fourth step is put into a powder feeder, cladding is immediately started within half an hour after the third step is finished, a wear-resistant layer is prepared, and the wear-resistant layer is cooled to room temperature according to a specified cooling mode to obtain a finished workpiece.

Preferably, in the first step, the lining plate includes a fixed cone and a movable cone.

Preferably, in the third step, the cladding laser spot is 3-5mm, the power is 4-6KW, the powder feeding is 3-8r/min, and the linear speed is 80-150 mm/s.

Preferably, in the third step, the cladding thickness of the bottom coating layer is 0.8mm-1 mm.

Preferably, in the fifth step, when the A1 type wear-resistant layer is prepared, the laser spot for cladding is 3-5mm, the power is 3-5KW, the powder feeding is 3-5r/min, and the linear speed is 15-45 mm/s; when the A2 type wear-resistant layer is prepared, a workpiece is heated to 500 ℃ by using oxyacetylene or liquefied gas, the temperature is kept for half an hour, a cladding laser spot is 3-5mm, the power is 3-5KW, the powder feeding is 3-5r/min, the linear speed is 10-40mm/s, the cladding is finished by using an asbestos net, and the workpiece is slowly cooled to the room temperature; when the A3 type wear-resistant layer is prepared, a workpiece is heated to 300-500 ℃ by using oxyacetylene or liquefied gas, the temperature is kept for half an hour, a cladding laser spot is 3-5mm, the power is 3-5KW, the powder feeding is 3-5r/min, the linear speed is 10-40mm/s, the cladding is finished by using an asbestos net, and the workpiece is slowly cooled to the room temperature.

Preferably, in the fifth step, the cladding thickness of the wear-resistant layer is 1.5mm-3 mm.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, a wear-resistant and impact-resistant pre-hardened coating is cladded on the surface of the high manganese steel by a laser cladding technology, so that the surface of the coating is worn firstly, after the surface is worn, the surface hardness of a high manganese steel substrate is obviously improved, the surface hardness and the wear resistance of the lining plate are improved, and the service life of the lining plate is prolonged.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic view of the workpiece processing of the present invention;

FIG. 3 is a histomorphogram of A1 powder;

FIG. 4 is a histomorphogram of A2 powder;

fig. 5 is a histomorphogram of a3 powder.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-5, a technical solution provided by the present invention is:

example 1:

a laser cladding pre-hardened cone crusher lining plate comprises the following formula: the priming coat comprises a priming coat material and an A1 type wear-resistant layer material, wherein the priming coat material comprises the following components in percentage by mass: 0.05% of C, 19% of Cr, 14% of Ni, 3.5% of Mo, 0.8% of Ti, 0.4% of Nb, 0.3% of Si and 61.95% of Fe; the A1 type wear-resistant layer material comprises the following components in percentage by mass: 1.0% C, 18% Cr, 8% W, 4% Mo, 1.3% Ti, 0.4% Nb and 67.3% Fe.

A processing technology of a laser cladding pre-hardened cone crusher lining plate comprises the steps of firstly, preprocessing the lining plate; step two, drying the bottom layer powder; cladding a bottom coating; step four, preparing mixed powder of the wear-resistant layer; step five, cladding a wear-resistant layer;

in the first step, a completely new liner plate of a cone crusher with the model FL4428818 is taken as an object, a fixed cone and a movable cone are installed on corresponding equipment, the position needing cladding is polished, oxides, paint and coating are removed, and fresh metal which is uniform and continuous is leaked from the position to be clad;

in the second step, the raw materials are weighed according to the proportion of the bottom layer material by taking the sum of the mass percentages as 1, and the bottom layer powder is obtained after sintering and crushing;

in the third step, the powder of the base coat prepared in the second step is put into a powder feeder, the base coat is cladded at the position to be cladded and treated in the first step, the cladding laser spot is 4mm, the power is 5KW, the powder feeding is 6r/min, the linear velocity is 150mm/s, and the cladding thickness of the base coat is 1 mm;

in the fourth step, the raw materials are weighed according to the material ratio of the A1 type wear-resistant layer, and the weighed raw materials are uniformly mixed by using a mixer to obtain A1 type wear-resistant layer mixed powder, wherein the sum of the mass percentages is 1;

and in the fifth step, the mixed powder of the A1 type wear-resistant layer prepared in the fourth step is put into a powder feeder, cladding is immediately started within half an hour after the third step, the A1 type wear-resistant layer is prepared, a finished workpiece is obtained after the mixed powder is cooled to room temperature according to a specified cooling mode, a cladding laser spot is 4mm, the power is 4KW, the powder feeding is 4r/min, the linear speed is 30mm/s, the cladding thickness of the wear-resistant layer is 2mm, the texture of the A1 powder is shown in figure 3, the right side in the figure is a base layer, the left side is the wear-resistant layer, and the WC is distributed in a special shape.

Example 2:

a laser cladding pre-hardened cone crusher lining plate comprises the following formula: the priming coat comprises a priming coat material and an A2 type wear-resistant layer material, wherein the priming coat material comprises the following components in percentage by mass: 0.05% of C, 19% of Cr, 14% of Ni, 3.5% of Mo, 0.8% of Ti, 0.4% of Nb, 0.3% of Si and 61.95% of Fe; the A2 type wear-resistant layer material comprises the following components in percentage by mass: 0.8% of C, 18% of Cr, 6% of Si, 5% of Fe, 1.0% of B, 1.3% of Ti, 0.4% of Nb, 27.5% of WC and 40% of Ni.

A processing technology of a laser cladding pre-hardened cone crusher lining plate comprises the steps of firstly, preprocessing the lining plate; step two, drying the bottom layer powder; cladding a bottom coating; step four, preparing mixed powder of the wear-resistant layer; step five, cladding a wear-resistant layer;

in the first step, a completely new liner plate of a cone crusher with the model FL4428818 is taken as an object, a fixed cone and a movable cone are installed on corresponding equipment, the position needing cladding is polished, oxides, paint and coating are removed, and fresh metal which is uniform and continuous is leaked from the position to be clad;

in the second step, the raw materials are weighed according to the proportion of the bottom layer material by taking the sum of the mass percentages as 1, and the bottom layer powder is obtained after sintering and crushing;

in the third step, the powder of the base coat prepared in the second step is put into a powder feeder, the base coat is cladded at the position to be cladded and treated in the first step, the cladding laser spot is 4mm, the power is 5KW, the powder feeding is 6r/min, the linear velocity is 150mm/s, and the cladding thickness of the base coat is 1 mm;

in the fourth step, the raw materials are weighed according to the material ratio of the A2 type wear-resistant layer, and the weighed raw materials are uniformly mixed by using a mixer to obtain A2 type wear-resistant layer mixed powder, wherein the sum of the mass percentages is 1;

and in the fifth step, the mixed powder of the A2 type wear-resistant layer configured in the fourth step is put into a powder feeder, cladding is immediately started within half an hour after the third step, the A2 type wear-resistant layer is prepared, a finished workpiece is obtained after the mixed powder is cooled to room temperature according to a specified cooling mode, the workpiece is heated to 300-500 ℃ by using oxyacetylene or liquefied gas, the temperature is kept for half an hour, a cladding laser spot is 4mm, the power is 4KW, the powder feeding is 4r/min, the linear speed is 30mm/s, after cladding is finished, the workpiece is coated by a asbestos net, the workpiece is slowly cooled to room temperature, the cladding thickness of the wear-resistant layer is 2mm, (the organization form of the A2 powder is shown in figure 4, the left side is a bottom layer, the right side is a wear-resistant layer, and the round distribution is WC).

Example 3:

a laser cladding pre-hardened cone crusher lining plate comprises the following formula: the priming coat comprises a priming coat material and an A3 type wear-resistant layer material, wherein the priming coat material comprises the following components in percentage by mass: 0.05% of C, 19% of Cr, 14% of Ni, 3.5% of Mo, 0.8% of Ti, 0.4% of Nb, 0.3% of Si and 61.95% of Fe; the A3 type wear-resistant layer material comprises the following components in percentage by mass: 0.8% C, 18% Cr, 6% Si, 5% Fe, 1.0% B, 1.3% Ti, 0.4% Nb, 11.5% Co (Ni) WC and 56% Ni.

A processing technology of a laser cladding pre-hardened cone crusher lining plate comprises the steps of firstly, preprocessing the lining plate; step two, drying the bottom layer powder; cladding a bottom coating; step four, preparing mixed powder of the wear-resistant layer; step five, cladding a wear-resistant layer;

in the first step, a completely new liner plate of a cone crusher with the model FL4428818 is taken as an object, a fixed cone and a movable cone are installed on corresponding equipment, the position needing cladding is polished, oxides, paint and coating are removed, and fresh metal which is uniform and continuous is leaked from the position to be clad;

in the second step, the raw materials are weighed according to the proportion of the bottom layer material by taking the sum of the mass percentages as 1, and the bottom layer powder is obtained after sintering and crushing;

in the third step, the powder of the base coat prepared in the second step is put into a powder feeder, the base coat is cladded at the position to be cladded and treated in the first step, the cladding laser spot is 4mm, the power is 5KW, the powder feeding is 6r/min, the linear velocity is 150mm/s, and the cladding thickness of the base coat is 1 mm;

in the fourth step, the raw materials are weighed according to the material ratio of the A3 type wear-resistant layer, and the weighed raw materials are uniformly mixed by using a mixer to obtain A3 type wear-resistant layer mixed powder, wherein the sum of the mass percentages is 1;

and in the fifth step, the mixed powder of the A3 type wear-resistant layer configured in the fourth step is put into a powder feeder, cladding is immediately started within half an hour after the third step, the A3 type wear-resistant layer is prepared, a finished workpiece is obtained after the mixed powder is cooled to room temperature according to a specified cooling mode, the workpiece is heated to 300-500 ℃ by using oxyacetylene or liquefied gas, the temperature is kept for half an hour, a cladding laser spot is 4mm, the power is 4KW, the powder feeding is 4r/min, the linear speed is 30mm/s, after cladding is finished, the workpiece is coated by a asbestos net, the workpiece is slowly cooled to room temperature, the cladding thickness of the wear-resistant layer is 2mm, (the organization form of the A3 powder is shown in figure 5, the left side is a bottom layer, the right side is a wear-resistant layer, and the round distribution is WC).

The wear layer material composition ratios of the examples are as follows:

	example 1	Example 2	Example 3
				C/%	1	0.8	0.8
Cr/%	18	18	18
				W/%	8	0	0
Mo/%	4	0	0
				Ti/%	1.3	1.3	1.3
Nb/%	0.4	0.4	0.4
				Fe/%	67.3	5	5
Si/%	0	6	6
				B/%	0	1	1
WC/%	0	27.5	0
				Ni/%	0	40	56
Co(Ni)WC/%	0	0	11.5

The pairs of stage workpiece parameters for each example are as follows:

	example 1	Example 2	Example 3
				Cladding total area per square meter of outer surface of cone and inner surface of moving cone	2	2	2
Workpiece hardness/HRC after cladding of priming coat	20-25	20-25	20-25
				Workpiece hardness/HRC after cladding of wear-resistant layer	65-68	60-62	56-62
Multiple/multiple of service life improvement of finished workpiece	2	1.5	1

Based on the above, the pre-hardening treatment is carried out on the surface of the lining plate by adopting the laser cladding technology, so that the surface of the lining plate generates a coating with metallurgical bonding and compact structure, the initial hardness of the lining plate of the cone crusher is improved, the coating is gradually worn by stones along with the use process, the high manganese steel serving as a base material is fully processed and hardened, the uniform martensitic stainless steel is formed on the surface, the surface hardness is greatly improved, and the wear resistance is also greatly improved; the method breaks through the limitation that the high manganese steel cannot or is difficult to carry out laser cladding, applies the laser cladding technology to the lining plate of the cone crusher, improves the service life of the lining plate of the cone crusher, and reduces the processing difficulty and processing consumption; in the present invention, the a1 powder prepared has the following advantages: after partial carbon is melted and solidified, the carbon is dissolved in martensite to form medium-carbon martensite which has certain hardness and good toughness, and the martensite contains a certain amount of W, Mo and other elements and can play a role in solid solution strengthening; the prepared A2 and A3 powder has the following advantages: WC and Co (Ni) WC are in a uniform spherical state and have similar sizes, so that the distribution density in the coating is higher, and the wear resistance of the coating can be obviously improved;

compared with the lining plate of the CN 108201917A-ceramic composite cone crusher and the preparation method thereof, the wear-resistant coating is added by the laser cladding technology, the process difficulty is low, the process stability is high, the toughness of the coating is good, the impact resistance is good, in addition, the laser cladding powder can be adjusted according to the requirements, and the performance of the coating can be adjusted according to different working conditions; compared with CN109648062A, a cone crusher lining plate with a cast-infiltration layer and a preparation method thereof, a cast-infiltration coating and a preparation method thereof-public, the cast-infiltration coating is processed in the casting process by using a chemical method, the cast-infiltration coating is processed in a laser mode after the casting is finished, and the process difficulty is low; compared with the lining plate of the cone crusher with a composite structure, namely CN210965261U, the lining plate is embedded with alloy, and the first wave abrasion is resisted through the outstanding alloy.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.