CN114986098A - Manufacturing process of high-performance wear-resisting plate for coal mining machine roller - Google Patents
Manufacturing process of high-performance wear-resisting plate for coal mining machine roller Download PDFInfo
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- CN114986098A CN114986098A CN202210658465.0A CN202210658465A CN114986098A CN 114986098 A CN114986098 A CN 114986098A CN 202210658465 A CN202210658465 A CN 202210658465A CN 114986098 A CN114986098 A CN 114986098A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention relates to a manufacturing process of a high-performance wear-resisting plate for a coal mining machine roller, which comprises the following operation steps: s1, cutting the steel plate according to requirements; s2, pressing and forming the cut steel plate according to requirements; s3, optimizing the layout of holes on the steel plate formed by pressing by using computer simulation; s4, drilling according to the obtained hole layout; s5, removing an oxide film and oil stains on the brazing contact surface; s6, placing the processed columnar hard alloy, brazing filler metal and brazing flux in the processed blind holes; s7, placing the whole assembly to be brazed in medium frequency induction heating equipment for heating to obtain the wear-resisting plate; s8, quenching the brazed wear-resisting plate; and S9, washing the quenched wear-resisting plate again. The wear-resisting plate manufacturing technology has the advantages that the product performance is good, the pollution is small in the manufacturing process, the wear-resisting plate manufacturing technology can adapt to wear-resisting plates of different shapes, the service life of the coal mining machine roller is effectively prolonged, the production cost of the coal mining machine roller is reduced, and meanwhile, the environmental pollution is reduced.
Description
Technical Field
The application relates to wear plate manufacturing, in particular to a manufacturing process of a high-performance wear plate for a roller of a coal mining machine.
Background
On the background of high yield and high efficiency advocated in the mining industry today, the coal mining machine drums are required to have a longer life. This requires that the wear resistant material of the shearer drum has a better wear resistance. In addition, the requirements for environmental protection are increasing, which in turn requires that the pollution in the production process of wear resistant materials is as small as possible.
The most used wear resistant material on shearer drums is the wear plate. The wear-resisting plate has good weldability and can be easily welded to a part needing to be protected; it is also required to have good wear resistance to protect key parts of the drum.
The manufacturing method of the roller wear-resisting plate of the coal mining machine widely used in the industry at present mainly comprises the following steps:
1. the imported hard alloy wear-resisting plate is manufactured by a casting method, and hard alloy particles are cast into a steel plate. The product manufactured by the method has good wear resistance, but the pollution is large in the casting process, and the wear-resisting plate with irregular shape is not easy to manufacture.
2. The domestic composite plate wear-resisting plate is manufactured by a cladding or surfacing method, but the wear-resisting property of the product manufactured by the cladding or surfacing method is insufficient, and the pollution in the manufacturing process is not small.
Therefore, there is a need to develop a wear plate manufacturing technology that has good product performance and little pollution during manufacturing process, and can adapt to different shapes, and the technology helps to achieve the purposes of continuously improving the wear resistance of the roller, replacing import and reducing cost.
Disclosure of Invention
The application solves the technical problem that proposes among the background art, provides one kind and produces the product and pollute little in the manufacturing process, can adapt to the antifriction plate manufacturing technology of different shapes, effectively improves the life of coal-winning machine cylinder, replaces the import in order to reduce the manufacturing cost of coal-winning machine cylinder, reduces environmental pollution when reducing the dependence to foreign this type of product.
In order to solve the technical problem, the technical scheme provided by the application is as follows: a manufacturing process of a high-performance wear-resisting plate for a coal mining machine roller comprises the following operation steps:
s1, cutting the steel plate according to the requirement:
cutting the steel plate into corresponding sizes by using a cutting machine according to the planar expansion size of a part to be protected on a roller of the coal mining machine;
s2, pressing and forming the steel plate cut in the step S1 according to requirements;
s3, optimizing the layout of holes on the steel plate press-formed in step S2 using computer simulation:
establishing the steel plate subjected to press forming in the step S2 into a three-dimensional model by using a three-dimensional scanning technology or three-dimensional modeling software, transmitting the three-dimensional model into finite element analysis software, and optimizing distribution positions capable of forming mutual protection among preset hard alloys on the steel plate subjected to press forming by using a computer simulation experiment to determine the layout of holes;
s4, according to the layout of the holes obtained in the step S3, drilling operation is carried out:
determining the diameter, depth and tolerance of the hole according to the size of the columnar hard alloy and the parameters of the brazing solder, drilling a blind hole with specified parameters on the surface of the steel plate according to the optimized layout of the hole by using a numerical control drilling machine, wherein the requirement of the assembly clearance of the brazing interface is as follows: the diameter of the blind hole is 0.01-0.1 mm larger than that of the columnar hard alloy;
s5, removing an oxide film and oil stains on the brazing contact surface:
chemical cleaning is adopted, including using dilute aqueous solution of acid or alkali to remove oxidation films and oil stains on the outer surface of the columnar hard alloy and the inner wall of the blind hole;
s6, placing the processed columnar hard alloy, the brazing filler metal and the brazing flux in the blind hole processed in the step S5, and preparing a brazing combination:
sequentially placing the processed columnar hard alloy into the processed blind holes, and placing brazing filler metal in gaps between the columnar hard alloy and the corresponding blind holes; adding soldering flux for removing oxides on the surfaces of the brazing filler metal and the base metal during brazing; the top of the columnar hard alloy is in a hemispherical shape or a bullet shape; the columnar hard alloy is made of tungsten carbide hard alloy with the diameter of 8-12 mm.
S7, heating the whole soldering-prepared combination in the step S6 in a medium-frequency induction heating device to obtain the wear-resisting plate:
s8, quenching the wear-resisting plate brazed in the step S7:
placing the wear-resisting plate which is just brazed into a quenching bath, and carrying out heat treatment on the wear-resisting plate to a certain hardness by using waste heat generated by brazing;
s9, washing the wear-resisting plate quenched in the step S8 again, wherein the washing method comprises the following steps:
(1) soaking in 60-80 deg.C hot water for 10min, cleaning the residue on the brazing seam with a brush, washing with cold water, and washing with HNO 3 Soaking in 15% water solution for about 30min, and washing with cold water.
(2) Flushing with flowing hot water at 60-80 deg.C for 5-10min, and placing at 65-75 deg.C for CrO 3 2％，H 3 RO 4 Soaking in 5% water solution for 15min, and washing with cold water.
Further, in the step S1, the Q345 low alloy steel plate with a thickness of 15-25 mm is used as the steel plate, and a grinding machine is used for cleaning cut edges, removing burrs and curling edges after cutting.
Further, in step S2, if the portion of the shearer drum to be protected is irregular, the pressing mold on the press machine is customized to the corresponding shape, and then the press machine is used to press the correspondingly cut steel plate into the specified shape; if the outer surface of the tooth holder to be protected on the roller is conical, cutting the steel plate into a fan shape, and pressing the fan shape into a conical shape with the same size by using a press machine; if the portion of the shearer drum to be protected is planar or approximately planar, the steel sheet cut in step S1 need not be processed.
Further, in the step S3, the optimization principle is that no channel without cemented carbide barrier can be formed in the direction of the flow of the coal and the rock.
Further, when the brazing filler metal is placed in the step S6, if the steel plate in the step S2 is a plane or is approximately a plane, the brazing filler metal is directly placed in a gap between the columnar hard alloy and the corresponding blind hole; if the steel plate in the step S2 is in an irregular shape, a layer of adhesive is coated on the outer surface of the columnar hard alloy and the inner wall of the blind hole, and then the brazing filler metal is placed in the gap between the columnar hard alloy and the corresponding blind hole, wherein the brazing filler metal is a sheet brazing filler metal or an annular brazing filler metal.
Further, in step S7, the heating temperature of the medium frequency induction heating equipment is adjusted to be higher than the melting point temperature of the added brazing filler metal and lower than the melting point temperature of the columnar hard alloy and the steel plate, the heating is stopped until the brazing filler metal is completely melted, the liquid brazing filler metal and the workpiece metal are mutually diffused and dissolved, and a brazed joint is formed after the liquid brazing filler metal and the workpiece metal are condensed; the heating temperature adjusted by the medium-frequency induction heating equipment is slightly higher than the melting point temperature of the added brazing filler metal.
Further, a wear-resistant wire is deposited around the wear-resistant plate processed in step S9 for providing further protection to the low-alloy steel plate.
This application has following advantage: compared with the prior art, the invention has the following advantages:
1. the traditional method for manufacturing the wear-resisting plate by surfacing, cladding or casting is abandoned, and a brazing mode is adopted, so that the method has the advantages of higher efficiency and more environmental friendliness;
2. compared with the mode of fixing the hard alloy in interference fit, the brazing mode is adopted, even if the carrier is ground to a certain thickness, the brazing solder can still maintain enough connection strength between the hard alloy and the carrier, and the hard alloy cannot be pulled out or broken off, so that the service life is longer;
3. the carrier of the wear-resistant material can be thermally treated to certain hardness by using the brazing waste heat, so that the carrier is more wear-resistant;
4. the material with the cobalt content of about 12 percent, such as YG12 domestic hard alloy, is adopted, so that the impact resistance and the wear resistance are balanced to the maximum extent;
5. the shape of the alloy is spherical or bullet-shaped cylindrical, so that the complete sliding friction between the surface of the wear-resistant plate and coal or rock is changed into partial rolling friction, the service life of the hard alloy is greatly prolonged, and the alloy is a mass-produced variety in China, and is high in quality and low in price;
6. the carrier of the wear-resistant material is a low alloy steel plate, so that the weldability is excellent, and the cost is controllable. Moreover, because the low alloy steel plate is easy to generate plastic deformation, a rectangular plane wear-resisting plate for protecting common parts and a conical wear-resisting plate for protecting the outer surface of the gear seat are easily manufactured;
7. over the last year of use, customer complaints about shearer drum wear resistance have dropped more than 1/3 compared to drums using U.S. imported cast scrap wear blocks. Compared with the roller using the domestic surfacing and cladding composite plate wear-resistant block, the complaint rate of the client about the wear resistance of the roller of the coal mining machine is reduced by more than 80 percent, which fully illustrates the effectiveness of the product manufactured by the application.
Drawings
Fig. 1 is a schematic structural view of a high-performance wear plate for a shearer drum according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to examples.
When the method is specifically implemented, a brazing manufacturing process commonly used in the mechanical industry and domestic high-quality and low-price industrial materials are combined together, and the method for manufacturing the wear-resisting plate is more environment-friendly, lower in cost, stronger in adaptability and better in product using effect.
As shown in figure 1: the method comprises the following steps:
a carrier 1 of wear-resistant material, a low alloy steel plate;
the top end of the domestic wear-resistant material 2 is made of spherical or bullet-shaped columnar hard alloy and is fixed on the carrier by a brazing method;
and (3) overlaying the wear-resistant layer 3 by using a wear-resistant welding wire as required (optional).
In addition, the product can be made into the plane shape to protect common parts, and can also be made into a conical shape to protect the outer surface of the tooth holder.
1. In order to achieve excellent wear resistance, an excellent wear resistant material is required:
1) and determining the wear-resistant material. Wear-resistant materials commonly used in the mechanical industry are: artificial diamond, cubic boron nitride, ceramics, tungsten carbide cemented carbide, high speed steel, high chromium cast iron, etc. The price of the artificial diamond and the cubic boron nitride is too high, the ceramic is not easy to braze, and the hardness and the wear resistance of the high-speed steel and the high-chromium cast iron do not meet the requirements, so that the wear-resistant material is finally selected to be the tungsten carbide hard alloy. By referring to the knowledge and experience of the tungsten carbide hard alloy used in the mining cutting pick, the hard alloy with the cobalt content of about 12 is determined to have the hardness and the toughness and the best performance.
2) Determining the shape and size of the wear resistant material. The cylindrical shape is the easiest shape to manufacture and process, and the diameter of about 10 mm gives consideration to performance and cost. The top of the hard alloy is in a hemispherical shape or a bullet head shape, so that the friction stress surface between the surface of the wear-resisting plate and coal or rock is reduced, friction is reduced, and the service life of the hard alloy is prolonged. So that the cylindrical tungsten carbide cemented carbide with a diameter of about 10 mm and a semispherical top part of domestic grade YG12 is finally selected.
2. It is necessary to identify suitable carriers for the wear-resistant material selected above, in order to facilitate welding to the parts to be protected:
the carrier selected for holding the wear-resistant material needs to have the following characteristics:
1) the welding property is good, and the roller can be easily welded to the part needing to be protected on the roller;
2) the plastic deformation is easy to generate, so that the plastic deformation is easy to press into different shapes by a press machine so as to adapt to the shape of the protected part;
3) the carrier has certain hardenability, so that the carrier can be thermally treated to certain hardness, and the carrier has certain wear resistance;
according to the above characteristic requirements, and considering cost factors, a low alloy steel plate with the thickness of about 20 mm, such as a Q345 steel plate, is selected. The conventional wear-resistant plate is used for protecting a plane or a part similar to the plane on a roller, such as the tail part of a blade, the end disc part and the like, and a rectangular shape is directly cut out of a steel plate. The special wear-resisting plate is used for protecting irregular-shaped positions on the roller, a steel plate is cut into required sizes, the steel plate is pressed into the required shapes by a press machine, for example, the outer surface of the tooth holder is in a conical shape, the steel plate is cut and then pressed into the conical shape with the same size.
3. Method for fixing wear-resistant material to carrier:
the methods for fixing tungsten carbide cemented carbide of various shapes and sizes to low alloy steel are: brazing, casting, surfacing, cladding, interference fit fixing and the like. Because the pollution is large in the casting, overlaying and cladding processes, and the wear-resistant materials fixed in an interference fit manner fall off early in the test process, the wear-resistant materials are manufactured by a brazing method finally.
4. Determining the distribution of the wear resistant material on the carrier:
and optimizing the distribution capable of forming mutual protection among the hard alloys by using a computer simulation method. The optimal approach is to not form channels in the direction of coal and rock flow without cemented carbide barriers.
5. The final manufacturing method steps are as follows:
s1, cutting the steel plate according to requirements:
cutting a steel plate into corresponding sizes by using a cutting machine according to the planar expansion size of a part to be protected on a roller of the coal mining machine, and cleaning cut edges by using a grinding machine or other methods after cutting without burrs or curled edges; according to the characteristic requirements of good weldability, plastic deformation and certain hardenability of the required steel plate, the Q345 low-alloy steel plate with the thickness of 15-25 mm is preferred;
s2, pressing and forming the steel plate cut in the step S1 according to requirements:
if the part to be protected on the roller of the coal mining machine is in an irregular shape, a pressing mould on a press machine is customized into a corresponding shape, then the press machine is used for pressing the correspondingly cut steel plate into a specified shape, if the outer surface of the tooth holder to be protected on the roller is in a conical shape, the steel plate is cut into a fan shape, and then the steel plate is pressed into a conical shape with the same size by the press machine;
if the portions of the shearer drum to be protected are planar or approximate to planar, the steel plate cut in step S1 does not need to be processed, such as the blade tail and the end disc portions.
S3, optimizing the layout of holes on the steel plate press-formed in step S2 using computer simulation:
establishing the steel plate subjected to press forming in the step S2 into a three-dimensional model by using a three-dimensional scanning technology or three-dimensional modeling software, transmitting the three-dimensional model into finite element analysis software, and optimizing preset distribution positions capable of forming mutual protection among the hard alloys on the steel plate subjected to press forming by using a computer simulation experiment to determine the layout of holes, wherein the optimization principle is that a channel without being blocked by the hard alloys cannot be formed in the flowing direction of coal and rock;
s4, according to the layout of the holes obtained in the step S3, drilling operation is carried out:
determining the diameter, depth and tolerance of the hole according to the size of the columnar hard alloy and the parameters of the brazing solder, drilling a blind hole with specified parameters on the surface of the steel plate according to the optimized layout of the hole by using a numerical control drilling machine or other drilling modes, and cleaning the hole by using the existing mode; according to the requirement of the assembly clearance of the brazing interface, the diameter of the blind hole is 0.01-0.1 mm larger than that of the columnar hard alloy;
s5, removing an oxide film and oil stains on the brazing contact surface:
in order to ensure the brazing effect, before brazing, oxide films and oil stains on the outer surface of the columnar hard alloy and the inner wall of the blind hole are generally removed, and chemical cleaning is commonly used, such as removing the films by using dilute aqueous solution of acid or alkali;
s6, placing the processed columnar hard alloy, the brazing filler metal and the brazing flux in the blind hole processed in the step S5, and preparing a brazing combination:
sequentially placing the processed columnar hard alloy into the processed blind holes, placing brazing filler metal in gaps between the columnar hard alloy and the corresponding blind holes, if the steel plate in the step S2 is a plane or is similar to the plane, directly placing the brazing filler metal in the gaps between the columnar hard alloy and the corresponding blind holes, if the steel plate in the step S2 is in an irregular shape, coating a layer of adhesive on the outer surface of the columnar hard alloy and the inner walls of the blind holes, then placing the brazing filler metal in the gaps between the columnar hard alloy and the corresponding blind holes, increasing the adhesive force, and preventing the brazing filler metal from falling off in the brazing process, preferably selecting powdery brazing filler metal and annular brazing filler metal; the brazing flux is added, so that oxides on the surfaces of the brazing filler metal and the base metal can be removed during brazing, the wetting effect is improved, and the brazing effect is ensured; preferably, the top of the columnar hard alloy is in a hemispherical shape or a bullet head shape, so that the friction stress surface between the surface of the wear-resisting plate and coal or rock is reduced, further the friction is reduced, and the service life of the hard alloy is prolonged; preferably, the cylindrical cemented carbide is tungsten carbide cemented carbide with a diameter of 8-12 mm, domestic grade YG 12.
S7, heating the whole assembly to be brazed in the step S6 in a medium frequency induction heating device to obtain the wear-resisting plate:
adjusting the heating temperature of the medium-frequency induction heating equipment to be higher than the melting point temperature of the added brazing filler metal and lower than the melting point temperature of the columnar hard alloy and the steel plate, stopping heating until the brazing filler metal is completely melted, sucking and filling the melted brazing filler metal into gaps between the columnar hard alloy and the corresponding blind holes by virtue of capillary action, mutually diffusing and dissolving the liquid brazing filler metal and the workpiece metal, and forming a brazed joint after condensation; preferably, the heating temperature adjusted by the medium-frequency induction heating equipment is slightly higher than the melting point temperature of the added brazing filler metal;
s8, quenching the wear-resisting plate which is just brazed in the step S7:
placing the wear-resisting plate which is just brazed into a quenching bath, and carrying out heat treatment on the wear-resisting plate to a certain hardness by using waste heat generated by brazing;
s9, washing the wear-resisting plate quenched in the step S8 again:
the brazing flux added in the brazing process is remained, so that the brazing joint is corroded and needs to be cleaned;
preferably, the cleaning method comprises the following steps:
(1) soaking in 60-80 deg.C hot water for 10min, carefully cleaning residue on brazing seam with brush, and washing HNO with cold water 3 Soaking in 15% water solution for about 30min, and washing with cold water.
(2)60-80 deg.C flowing hot waterWashing for 5-10min at 65-75 deg.C with CrO 3 2％，H 3 RO 4 Soaking in 5% water solution for 15min, and washing with cold water.
Further protection of the low alloy steel plate is provided by bead welding of wear wire around the treated wear plate in step S9S 10 (this step is optional and is only used to manufacture individual wear plates.
While the invention has been shown and described with reference primarily to certain embodiments thereof, it will be understood by those skilled in the art that various changes in construction and details may be made therein without departing from the scope of the invention encompassed by the appended claims. The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention. The scope of the invention is, therefore, indicated by the appended claims, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A manufacturing process of a high-performance wear-resisting plate for a roller of a coal mining machine is characterized by comprising the following operation steps:
s1, cutting the steel plate according to the requirement:
cutting the steel plate into corresponding sizes by using a cutting machine according to the planar expansion size of a part to be protected on a roller of the coal mining machine;
s2, pressing and forming the steel plate cut in the step S1 according to requirements;
s3, optimizing the layout of the holes in the steel plate press-formed in step S2 using computer simulation:
establishing the steel plate subjected to press forming in the step S2 into a three-dimensional model by using a three-dimensional scanning technology or three-dimensional modeling software, transmitting the three-dimensional model into finite element analysis software, and optimizing distribution positions capable of forming mutual protection among preset hard alloys on the steel plate subjected to press forming by using a computer simulation experiment to determine the layout of holes;
s4, according to the layout of the holes obtained in the step S3, drilling operation is carried out:
determining the diameter, the depth and the tolerance of the hole according to the size of the columnar hard alloy and the parameters of the brazing solder, and drilling a blind hole with specified parameters on the surface of the steel plate according to the optimized layout of the hole by using a numerical control drilling machine, wherein the assembly clearance requirement of the brazing interface is as follows: the diameter of the blind hole is 0.01-0.1 mm larger than that of the columnar hard alloy;
s5, removing an oxide film and oil stains on the brazing contact surface:
chemical cleaning is adopted, which comprises removing oxide films and oil stains on the outer surface of the columnar hard alloy and the inner wall of the blind hole by using dilute aqueous solution of acid or alkali;
s6, placing the processed columnar hard alloy, the brazing filler metal and the brazing flux in the blind hole processed in the step S5, and preparing a brazing combination:
sequentially placing the processed columnar hard alloy into the processed blind holes, and placing brazing filler metal in gaps between the columnar hard alloy and the corresponding blind holes; adding soldering flux for removing oxides on the surfaces of the brazing filler metal and the base metal during brazing; the top of the columnar hard alloy is in a hemispherical shape or a bullet shape; the columnar hard alloy is made of tungsten carbide hard alloy with the diameter of 8-12 mm;
s7, heating the whole assembly to be brazed in the step S6 in a medium frequency induction heating device to obtain the wear-resisting plate:
s8, quenching the wear-resisting plate brazed in the step S7:
placing the wear-resisting plate which is just brazed into a quenching bath, and carrying out heat treatment on the wear-resisting plate to a certain hardness by using waste heat generated by brazing;
s9, washing the wear-resisting plate quenched in the step S8 again, wherein the washing method comprises the following steps:
(1) soaking in 60-80 deg.C hot water for 10min, cleaning the residue on the brazing seam with a brush, washing with cold water, and washing with HNO 3 Soaking in 15% water solution for about 30min, and washing with cold water;
(2) flushing with flowing hot water at 60-80 deg.C for 5-10min, and placing at 65-75 deg.C for CrO 3 2％，H 3 RO 4 Soaking in 5% water solution for 15min, and washing with cold water.
2. The manufacturing process of the wear plate for the high-performance shearer drum according to claim 1, wherein the manufacturing process comprises the following steps: in the step S1, the Q345 low alloy steel plate with a thickness of 15-25 mm is used as the steel plate, and a grinding machine is used for cleaning cut edges, removing burrs and curling edges after cutting.
3. The manufacturing process of the high-performance wear plate for the shearer drum as claimed in claim 1, wherein the manufacturing process comprises the following steps: in the step S2, if the part to be protected on the roller of the coal mining machine is in an irregular shape, a pressing mold on the press machine is customized into a corresponding shape, and then the press machine is used for pressing the correspondingly cut steel plate into a specified shape; if the outer surface of the tooth holder to be protected on the roller is conical, cutting the steel plate into a fan shape, and pressing the fan shape into a conical shape with the same size by using a press machine; if the portion of the shearer drum to be protected is planar or approximately planar, the steel sheet cut in step S1 need not be processed.
4. The manufacturing process of the wear plate for the high-performance shearer drum according to claim 1, wherein the manufacturing process comprises the following steps: in said step S3, the principle of optimization is that no channels without cemented carbide barriers can be formed in the direction of coal and rock flow.
5. The manufacturing process of the wear plate for the high-performance shearer drum according to claim 1, wherein the manufacturing process comprises the following steps: when the brazing filler metal is placed in the step S6, if the steel plate in the step S2 is a plane or is approximately the plane, the brazing filler metal is directly placed in a gap between the columnar hard alloy and the corresponding blind hole; if the steel plate in the step S2 is in an irregular shape, a layer of adhesive is coated on the outer surface of the columnar hard alloy and the inner wall of the blind hole, and then the brazing filler metal is placed in the gap between the columnar hard alloy and the corresponding blind hole, wherein the brazing filler metal is a sheet brazing filler metal or an annular brazing filler metal.
6. The manufacturing process of the high-performance wear plate for the shearer drum as claimed in claim 1, wherein the manufacturing process comprises the following steps: in the step S7, the heating temperature of the medium-frequency induction heating equipment is adjusted to be higher than the melting point temperature of the added brazing filler metal and lower than the melting point temperature of the columnar hard alloy and the steel plate, the heating is stopped until the brazing filler metal is completely melted, the liquid brazing filler metal and the workpiece metal are mutually diffused and dissolved, and a brazed joint is formed after condensation; the heating temperature adjusted by the medium-frequency induction heating equipment is slightly higher than the melting point temperature of the added brazing filler metal.
7. The manufacturing process of the wear plate for the high-performance shearer drum according to claim 1, wherein the manufacturing process comprises the following steps: a wear wire is deposited around the treated wear plate in step S9 to provide further protection to the low alloy steel plate.
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