A mosaic alloy tooth plate based on modified high manganese steel and a production process thereof

Abstract

The application belongs to the technical field of alloy tooth plate preparation, and particularly relates to an inlaid alloy tooth plate based on modified high manganese steel and a production process thereof. The inlaid alloy tooth plate based on modified high manganese steel comprises multiple arc-shaped tooth plates and a detachable tooth column assembly. Multiple arc-shaped bosses are arranged on the arc-shaped tooth plates, tooth column crushing channels are arranged between adjacent arc-shaped bosses, boss columns are arranged on the arc-shaped bosses, the tooth column assembly is detachably installed on the boss columns, two rows of protruding nail grooves are arranged in the tooth column crushing channels, and protruding tooth nails are installed in the protruding nail grooves. The tooth column assembly comprises a tooth column body, an expansion gasket and a fixing assembly. The production process steps comprise: preparing raw materials; preparing accessories; spraying a coating on the accessories; storing the accessories at low temperature; assembling the accessories into inlaid alloy tooth plate one and inlaid alloy tooth plate two. The protruding tooth part is designed as a detachable structure, and is installed at low temperature to improve the stability of installation, so that the problems of low hardness of the protruding tooth of the existing long protruding tooth alloy tooth plate, low service life, high replacement and maintenance cost and the like are solved.

Description

Technical Field

[0001] This invention belongs to the field of alloy tooth plate preparation technology, specifically an inlaid alloy tooth plate based on modified high manganese steel and its production process. Background Technology

[0002] Modified high-manganese steel inlaid alloy tooth plates are composite tooth plates with hard alloy materials inlaid on a high-manganese steel matrix. They are mainly used in crushing equipment in mining, building materials and other fields to improve the wear resistance of the tooth plates and extend their service life. However, the height of the protruding teeth is generally not high, and the impact force that the sides of the protruding teeth need to withstand is not high. Generally, the tip of the protruding teeth crushes ores, but these short protruding teeth cannot crush smaller ores, and the impact force on the tooth plate during the crushing process is relatively large (when the protruding teeth crush the ore, the impact force is transmitted to the tooth plate through the protruding teeth).

[0003] For alloy toothed plates with long convex teeth, the hardness requirements for the convex teeth are higher, and the same material as the toothed plate base cannot be used. The convex teeth on two opposing crushing rollers need to interlock (leaving gaps between the convex teeth). When the convex teeth are about to contact the toothed plate base, they will squeeze and crush the ore. However, due to the large contact area with the ore and the tendency to slip, the crushing efficiency of the ore is low. In addition, because the length of the convex teeth is longer, they cannot be completely embedded in the toothed plate base. A section needs to be exposed to squeeze and crush the ore. However, the installation of exposed and detachable convex teeth is more troublesome, they are easy to loosen, and the bolt tightening operation is also more troublesome. If the convex teeth are damaged, replacement is inconvenient, which may lead to high maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide an inlaid alloy tooth plate based on modified high-manganese steel and its manufacturing process. By designing the convex tooth part as a detachable structure and using low-temperature installation to improve installation stability, the convex tooth is easy to disassemble and replace. This solves the problems of low hardness of the convex teeth, short service life, and high replacement and maintenance costs of alloy tooth plates with long convex teeth in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] An inlaid alloy toothed plate based on modified high-manganese steel includes multiple arc-shaped toothed plates and a detachable toothed column assembly. Multiple arc-shaped bosses are evenly spaced on the arc-shaped toothed plates, and toothed column crushing channels are provided between adjacent arc-shaped bosses. Bosses are evenly spaced on the arc-shaped bosses, and the toothed column assembly is detachably mounted on the bosses. Mounting bolt holes are provided on the arc-shaped bosses at the middle position of adjacent bosses. Two rows of protruding nail grooves are provided on the upper surface of the arc-shaped toothed plate at each toothed column crushing channel position, and protruding toothed nails are installed in the protruding nail grooves.

[0007] The arc-shaped toothed plate is integrally cast from modified high-manganese steel raw material;

[0008] The toothed column assembly includes a toothed column body, an expansion pad, and a fixing component. The toothed column body includes a plug-in core column and a rigid conical platform. The top of the plug-in core column is fitted with a rigid conical platform. An expansion pad is fitted on the plug-in core column, and the plug-in core column is inserted into the boss column and fixed by the fixing component. The expansion pad is squeezed by the rigid conical platform and the boss column. The plug-in core column is made of modified high manganese steel.

[0009] The toothed nail is a hard nail. The lower half of the toothed nail is inserted into the nail groove and fixed. The nail head of the upper half of the toothed nail protrudes outside the surface of the arc-shaped toothed plate.

[0010] Multiple arc-shaped toothed plates are sequentially spliced ​​together and fixedly installed on the outer wall of the crushing cylinder.

[0011] Furthermore, the outer surface of the arc-shaped toothed plate, the outer surface of the boss column, and the surface of the hard conical platform are all coated with a wear-resistant coating, which is either a tungsten carbide coating or a nickel-based self-fluxing alloy coating.

[0012] Furthermore, the center of the boss post is provided with a square insertion hole that penetrates the arc-shaped toothed plate, and the square insertion hole has a fixing plate groove on the back of the arc-shaped toothed plate. The fixing component includes two first bolts and a fixing base plate, and the bottom of the insertion core post is provided with two first bolt holes.

[0013] The toothed column body and fixing assembly are stored in an environment of -100℃ to -80℃, and the expansion gasket is stored in an environment of -180℃ to -160℃. The expansion gasket is placed on the plug-in core column and pressed against the rigid conical platform. The plug-in core column is inserted into the square insertion hole. The two first bolts pass through the fixing base plate and are screwed into the corresponding first bolt holes. The fixing base plate is stuck in the fixing plate groove.

[0014] Furthermore, the insert core and hard conical platform in the toothed column body are replaced with a second insert core and a second hard conical platform, respectively. The height of the second hard conical platform is less than that of the hard conical platform. The second hard conical platform is fitted into the upper half of the second insert core. The top of the second hard conical platform is provided with an alloy head groove. Fixing bolt holes are provided on both sides of the alloy head groove. A hard alloy head is inserted into the alloy head groove. The hard alloy head includes an integrally formed convex tooth head and an insert part. The insert part is interference-fitted into the alloy head groove and the side fixing bolt is screwed into the insert part from the fixing bolt hole.

[0015] When in operation, the convex tooth head is positioned at the midline of the two rows of convex tooth nails on the crushing channel of the corresponding arc-shaped tooth plate, and the convex tooth head does not contact the corresponding two rows of convex tooth nails.

[0016] Furthermore, the cemented carbide head and the protruding tooth are made of the same material and are manufactured using the same process. The cemented carbide head is made of tungsten carbide mixed with cobalt and nickel, and the surfaces of the cemented carbide head and the protruding tooth are coated with a titanium aluminum nitride coating.

[0017] Furthermore, the bottom of the protruding nail groove is provided with a connecting bolt hole that penetrates the arc-shaped toothed plate, and the bottom of the insert rod body is provided with a second bolt hole. The protruding tooth nail is stored in an environment of -180℃ to -160℃. The insert rod body is inserted into the protruding nail groove without contacting the bottom of the protruding nail groove. A connecting bolt is inserted from the connecting bolt hole on the back of the arc-shaped toothed plate and screwed into the second bolt hole to fix the protruding tooth nail.

[0018] Furthermore, the insert core and the arc-shaped toothed plate are made of the same material, and the insert core and the second insert core are made of the same material and process. The raw material of the arc-shaped toothed plate includes carbon 1.0%-1.8%, manganese 12%-20%, silicon 0.8%-1.2%, chromium 0.5%-1.5%, rare earth elements 0.5%-2.5%, and the balance is iron by mass percentage.

[0019] Both the hardened conical truncated platform and the second hardened conical truncated platform are made of zirconium oxide toughened alumina.

[0020] A manufacturing process for the above-mentioned inlaid alloy toothed plate based on modified high-manganese steel includes the following steps:

[0021] S1: Prepare modified high-manganese steel raw materials, heat the modified high-manganese steel raw materials in an electric arc furnace, introduce argon gas for protective heating, and cast arc-shaped toothed plates, insert core columns and second insert core columns into different molds.

[0022] Zirconia-toughened alumina raw materials were prepared, and hardened conical truncated structures and second hardened conical truncated structures were prepared using ZTA preparation technology.

[0023] Tungsten carbide powder, cobalt and nickel powder and molding aids are mixed evenly, the mixed powder is added into a mold for hot pressing, and then the molding aids are removed and sintered to prepare cemented carbide heads and protruding teeth.

[0024] Preparation of expansion gaskets made of aluminum alloy;

[0025] S2: Tungsten carbide coating or nickel-based self-fluxing alloy coating is sprayed on the upper surface of the arc-shaped tooth plate, the outer surface of the hard conical truncated plate, and the outer surface of the second hard conical truncated plate. Titanium aluminum nitride coating is sprayed on the surface of the hard alloy head and the protruding tooth.

[0026] S3: The hard conical platform is fitted onto the upper half of the insertion core and fixed to form the toothed core body; the second hard conical platform is fitted onto the upper half of the second insertion core and fixed to form the second toothed core body.

[0027] S4: Store the main body of the toothed column, the second toothed column, and the fixing components for mounting the main body of the toothed column and the second toothed column together in an environment of -100℃ to -80℃, and store the toothed pin, expansion pad, and carbide head in an environment of -180℃ to -160℃.

[0028] S5: Multiple arc-shaped protrusions are evenly spaced on the arc-shaped toothed plate, and a tooth column crushing channel is provided between adjacent arc-shaped protrusions. Protrusion columns are evenly spaced on the arc-shaped protrusions, and mounting bolt holes are provided on the arc-shaped protrusions at the middle position of adjacent protrusion columns. Two rows of protruding nail grooves are provided on the upper surface of the arc-shaped toothed plate at each tooth column crushing channel position.

[0029] One by one, the cryogenically preserved tooth column bodies are removed. An expansion pad is fitted onto the insert core column. The insert core column is inserted into the boss column. The insert core column is fixed on the back of the arc-shaped tooth plate at the position corresponding to each boss column using a fixing component, so that the expansion pad is squeezed by the hard conical platform and the boss column. The tooth column bodies are installed one by one. The tooth pins are removed one by one and installed in each tooth pin groove. The tooth pins are fixed on the back of the arc-shaped tooth plate corresponding to each tooth pin groove using connecting bolts. The installation is completed, and the assembly forms an inlaid alloy tooth plate one.

[0030] One by one, the cryogenically preserved second tooth column body is removed, and an expansion gasket is fitted onto the second insert core column. The second insert core column is inserted into the boss column. The second insert core column is fixed on the back of the arc-shaped tooth plate at the position corresponding to each boss column using a fixing component, so that the expansion gasket is squeezed by the second hard conical platform and the boss column. The second tooth column body is installed one by one. The protruding tooth nail is removed one by one and installed in each protruding tooth groove. The protruding tooth nail is fixed by connecting bolts to the bottom of the protruding tooth nail at the back position of the arc-shaped tooth plate corresponding to each protruding tooth groove. The cryogenically preserved hard alloy head is removed, and the insert part of the lower half of the hard alloy head is inserted one by one into the alloy head groove at the top of the second hard conical platform. The side fixing bolts are screwed into the insert part from the fixing bolt holes on both sides of the second hard conical platform to complete the installation and assemble to form the second inlaid alloy tooth plate.

[0031] S6: When the inlaid alloy tooth plate one and inlaid alloy tooth plate two return to room temperature

[0032] Multiple inlaid alloy toothed plates are attached one by one to the crushing cylinder, and the first crushing drum is formed by using mounting bolts to install them on the crushing cylinder through the mounting bolt holes.

[0033] The two inlaid alloy toothed plates are attached one by one to the crushing cylinder, and the second crushing cylinder is formed by using mounting bolts to install them on the crushing cylinder through the mounting bolt holes.

[0034] Furthermore, the modified high-manganese steel raw material comprises, by mass percentage, 1.0%-1.8% carbon, 12%-20% manganese, 0.8%-1.2% silicon, 0.5%-1.5% chromium, 0.5%-2.5% rare earth elements, with the balance being iron.

[0035] Furthermore, in step S2, the tungsten carbide coating, nickel-based self-fluxing alloy coating, and titanium aluminum nitride coating are all applied by multiple sprayings, and the composition of each spraying is changed to improve the performance of each coating layer.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. This invention designs a detachable segment of the convex tooth portion of the alloy tooth plate, with a detachable length exceeding half the overall length of the convex tooth. Since the boss (belonging to the lower half of the convex tooth) and the arc-shaped tooth plate are integrated, stability is excellent. Furthermore, the insert core (or second insert core) is interference-fitted into the boss and extends into the arc-shaped tooth plate. Due to the inner lining effect of the insert core, the boss is less prone to deformation, achieving an integrated structure with the insert core, resulting in greater structural stability. The boss can withstand compression and impact forces. The hard conical platform (second hard conical platform) fitted onto the upper half of the insert core (or second insert core) increases the hardness of the contact surface. Since the upper half of the convex tooth has more contact with the ore and applies compression, high hardness is required. Because the hard conical platform (ZTA) is harder than modified high-manganese steel, it can withstand pressure without deformation and is less prone to wear, thus improving the lifespan of the convex tooth under prolonged crushing.

[0038] 2. This invention, through its low-temperature insulated toothed column assembly, ensures an interference fit after installation, resulting in excellent stability. The expansion gasket's design allows for significant expansion as the components return to room temperature, effectively pulling the insert core upwards and preventing it from being easily pulled out, thus improving stability. Furthermore, the interference fit integrates the insert core into the boss column, creating a unified structure and further enhancing stability. During subsequent maintenance, the insert core can be pushed out of the boss column by tapping it with a steel nail from the back of the arc-shaped toothed plate, allowing for replacement of the toothed column assembly without needing to replace the entire alloy toothed plate, reducing maintenance costs. Only the damaged tooth needs to be replaced.

[0039] 3. In order to improve the crushing effect of ore, this invention replaces the hard conical platform with a second hard conical platform structure. A detachable carbide head (with the same hardness and rigidity as the cutting head of metal cutting) can be installed on the top. Then, the ore is crushed against the protruding tooth nail. Since it is a point crushing, the ore can be crushed instantly. The crushed stone is then crushed by the entire protruding tooth, resulting in a better crushing effect. In addition, the protruding tooth nail can reduce the rolling of ore in the tooth column crushing channel, so that the ore is stuck in the tooth column crushing channel and crushed. Compared with the traditional method of only protruding tooth crushing, the crushing effect is improved.

[0040] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the first assembly method (inlaid alloy tooth plate one) for inlaid alloy tooth plates based on modified high manganese steel.

[0043] Figure 2 This is an exploded structural diagram of the first assembly method (inlaid alloy tooth plate one) of the inlaid alloy tooth plate based on modified high manganese steel.

[0044] Figure 3 This is a schematic diagram of the second assembly method (inlaid alloy tooth plate II, with carbide head) based on modified high-manganese steel inlaid alloy tooth plate;

[0045] Figure 4 This is an exploded structural diagram of the second assembly method (inlaid alloy tooth plate II, with carbide head) based on modified high-manganese steel inlaid alloy tooth plate;

[0046] Figure 5 An exploded structural diagram of an alloy toothed plate embedded in a toothed column body.

[0047] Figure 6 A schematic diagram of the structure at the upper surface of the arc-shaped toothed plate;

[0048] Figure 7 A schematic diagram of the structure at the lower surface of the arc-shaped toothed plate;

[0049] Figure 8 This is a schematic diagram of the main body of the second tooth column.

[0050] In the diagram: 1. Crushing cylinder; 11. Bolt hole for mounting toothed plate; 2. Arc-shaped toothed plate; 21. Boss post; 211. Square insertion hole; 212. Fixing plate groove; 22. Arc-shaped boss; 221. Mounting bolt hole; 23. Tooth column crushing channel; 24. Protruding nail groove; 241. Connecting bolt hole; 3. Tooth column body; 31. Hard conical platform; 32. Inserted core column; 4. Protruding tooth nail; 40. Connecting bolt; 41. Nail head; 42. Insert rod body; 5. Expansion gasket; 6. Fixing base plate; 61. First bolt; 7. Second tooth column body; 71. Second hard conical platform; 711. Alloy head groove; 712. Fixing bolt hole; 72. Second inserted core column; 8. Hard alloy head; 80. Side fixing bolt; 81. Protruding tooth head; 82. Inserted column part. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Please see Figures 1-8 The present invention is an inlaid alloy toothed plate based on modified high manganese steel, comprising multiple arc-shaped toothed plates 2 and a detachable toothed column assembly. Multiple arc-shaped bosses 22 are equally spaced on the arc-shaped toothed plates 2, and toothed column crushing channels 23 are provided between adjacent arc-shaped bosses 22. Bosses 21 are equally spaced on the arc-shaped bosses 22, and the toothed column assembly is detachably installed on the bosses 21. Mounting bolt holes 221 are provided on the arc-shaped bosses 22 at the middle position of adjacent bosses 21. Two rows of protruding nail grooves 24 are provided on the upper surface of the arc-shaped toothed plate 2 at the position of each toothed column crushing channel 23, and protruding toothed nails 4 are installed in the protruding nail grooves 24.

[0053] The arc-shaped boss 22 is designed to increase the thickness of the arc-shaped toothed plate 2 at the position of the boss post 21 (equivalent to the sum of the thickness of the arc-shaped boss 22 and the arc-shaped toothed plate 2), thereby increasing the impact force of the boss post 21 when it receives crushed stones. It also forms a toothed column crushing channel 23, where the protruding toothed nails 4 are installed in the protruding nail grooves 24 within the toothed column crushing channel 23. This allows for more orderly installation and arrangement (making it easier for the ore to roll within the toothed column crushing channel 23), enabling more precise crushing of the ore. The toothed column assembly is detachably installed on the boss post 21, facilitating replacement in case of future damage and reducing maintenance costs. The protruding toothed nail 4 is shaped as follows... Figure 5 As shown, the upper part of the nail head 41 is in the shape of a protrusion, which can ensure that the contact surface between the top of the protrusion and the ore is small, so that the ore can be crushed better. The bottom of the protrusion is attached to the surface of the arc-shaped toothed plate 2, and the insert rod body 42 plays the role of stabilizing the entire protruding toothed nail 4.

[0054] The arc-shaped toothed plate 2 is integrally cast from modified high-manganese steel raw material; the arc-shaped toothed plate 2 includes an arc-shaped boss 22 and a boss column 21, and the integral structure has good stability.

[0055] The toothed column assembly includes a toothed column body 3, an expansion pad 5, and a fixing component. The toothed column body 3 includes an insert core 32 and a rigid conical platform 31. The top of the insert core 32 is fitted with the rigid conical platform 31. The insert core 32 is fitted with the expansion pad 5 and the insert core 32 is inserted into the boss 21 and fixed by the fixing component. The expansion pad 5 is squeezed by the rigid conical platform 31 and the boss 21. The insert core 32 is made of modified high manganese steel.

[0056] The insert core 32 is used to connect the rigid conical truncated pyramid 31 and the boss post 21, becoming the central core. The insert core 32 is first inserted into the rigid conical truncated pyramid 31, and the connection between the two is stabilized by using a weld gap or a pin passing through the rigid conical truncated pyramid 31 and the insert core 32.

[0057] The expansion pad 5 is installed after being stored at low temperature. After installation, when the temperature returns to normal, the expansion pad 5 will expand and push against the rigid conical platform 31, so that the gap between the rigid conical platform 31 and the boss post 21 is filled by the expanded expansion pad 5, making the installation more stable.

[0058] The toothed nail 4 is a hard nail. The lower half of the toothed nail 4, the insert body 42, is inserted into the toothed nail groove 24 and fixed. The nail head 41 of the upper half of the toothed nail 4 is exposed outside the upper surface of the arc-shaped toothed plate 2.

[0059] Multiple arc-shaped toothed plates 2 are sequentially spliced ​​and fixedly installed on the outer wall of the crushing cylinder 1 (e.g. Figure 1 and 3 (As shown).

[0060] The outer surfaces of the arc-shaped toothed plate 2, the boss column 21, and the hard conical platform 31 are all coated with a wear-resistant coating, which is either a tungsten carbide coating or a nickel-based self-fluxing alloy coating. The coating can improve the wear resistance and hardness of the surface, thereby improving the wear resistance of the surface of the parts in contact with the ore.

[0061] The center of the boss post 21 is provided with a square insertion hole 211 that penetrates the arc-shaped toothed plate 2. The square insertion hole 211 has a fixing plate groove 212 on the back of the arc-shaped toothed plate 2. The fixing assembly includes two first bolts 61 and a fixing base plate 6. The bottom of the insertion core post 32 is provided with two first bolt holes.

[0062] The toothed column body 3 and the fixing assembly are stored in an environment of -100℃ to -80℃, and the expansion gasket 5 is stored in an environment of -180℃ to -160℃. The expansion gasket 5 is put on the plug-in core column 32 and pressed against the hard conical platform 31. The plug-in core column 32 is inserted into the square plug hole 211. Two first bolts 61 pass through the fixing base plate 6 and are screwed into the corresponding first bolt holes. The fixing base plate 6 is stuck in the fixing plate groove 212.

[0063] The toothed column body 3 and the fixing components are stored in an environment of -100℃ to -80℃, where the shrinkage is less than that in an environment of -180℃ to -160℃. Because the insertion core 32 is relatively wide (3-4cm on each side, shrinking by 0.5-1.0mm to fit into the square insertion hole 211), after installation, the insertion core 32 will be interference-fitted into the square insertion hole 211. The fixing base plate 6 and expansion pad 5 will push against the rigid conical platform 31 when it returns to room temperature, ensuring that the insertion core 32 is tightly held in place and preventing it from moving up and down. Low-temperature installation allows all installed components to be interference-fitted into their corresponding installation positions, resulting in a unified structure with excellent stability after installation.

[0064] The insert core 32 and hard conical platform 31 in the toothed column body 3 are replaced by the second insert core 72 and the second hard conical platform 71 respectively. The height of the second hard conical platform 71 is less than that of the hard conical platform 31. The second hard conical platform 71 is fitted into the upper half of the second insert core 72. The top of the second hard conical platform 71 is provided with an alloy head groove 711. The two side walls of the alloy head groove 711 are provided with fixing bolt holes 712. A hard alloy head 8 is inserted into the alloy head groove 711. The hard alloy head 8 includes an integrally formed protruding tooth head 81 and an insert part 82. The insert part 82 is interference-fitted into the alloy head groove 711 and the side fixing bolt 80 is screwed into the insert part 82 from the fixing bolt hole 712.

[0065] When in operation, the convex tooth head 81 is located at the midline of the two rows of convex tooth nails 4 on the tooth column crushing channel 23 corresponding to the arc-shaped tooth plate 2, and the convex tooth head 81 does not contact the corresponding two rows of convex tooth nails 4.

[0066] The insert core 32 and the second insert core 72 are made of the same material and have the same width, but their lengths are slightly different. This requires lowering the height of the second hardened conical platform 71 to accommodate the carbide head 8. The top of the carbide head 8 is a protruding tooth 81, shaped like a pointed boss, which corresponds to the two rows of protruding tooth spikes 4, enabling the crushing and extrusion of the ore at three points. Both the carbide head 8 and the protruding tooth spikes 4 have high hardness, more than 10 times higher than that of modified high-manganese steel, and their material is similar to that of cutting tools used for cutting metal.

[0067] The cemented carbide head 8 and the protruding tooth 4 are made of the same material and manufactured using the same process. The cemented carbide head 8 is made of tungsten carbide mixed with cobalt and nickel. Both the cemented carbide head 8 and the protruding tooth 4 are coated with a titanium aluminum nitride coating. The titanium aluminum nitride coating results in higher hardness. Titanium aluminum nitride coating is one of the most widely used hard coatings in the industrial field, possessing excellent hardness performance and also exhibiting high temperature resistance, wear resistance, and oxidation resistance. The hardness of the titanium aluminum nitride coating can reach 2800~3500 HV at room temperature, and it still maintains above 2000 HV at high temperatures (600℃), making it one of the coatings with the best comprehensive performance, combining high hardness, high temperature resistance, and high toughness.

[0068] The bottom of the protruding nail groove 24 is provided with a connecting bolt hole 241 that penetrates the arc-shaped toothed plate 2, and the bottom of the insert rod body 42 is provided with a second bolt hole. The protruding tooth nail 4 is stored in an environment of -180℃ to -160℃. The insert rod body 42 is inserted into the protruding nail groove 24 without contacting the bottom of the protruding nail groove 24. A connecting bolt 40 is inserted from the connecting bolt hole 241 on the back of the arc-shaped toothed plate 2 and screwed into the second bolt hole to fix the protruding tooth nail 4.

[0069] The low-temperature protruding toothed nail 4 is inserted into the protruding nail groove 24, so that the boss-shaped bottom of the nail head 41 is tightly attached to the surface of the arc-shaped toothed plate 2. Then, the connecting bolt 40 is quickly inserted and screwed into the second bolt hole to fix the protruding toothed nail 4, thereby fixing the bottom of the protruding toothed nail 4. After it expands to room temperature, the insert body 42 will be interference-locked into the protruding nail groove 24. However, since the insert body 42 of the protruding toothed nail 4 is not long, the protruding toothed nail 4 will not shake after it returns to room temperature. Alternatively, the connecting bolt 40 can be installed to fix it after it returns to room temperature. Because the top of the protruding toothed nail 4 is subjected to downward extrusion during crushing, it will not detach from the protruding nail groove 24.

[0070] The insert core 32 and the arc-shaped toothed plate 2 are made of the same material. The insert core 32 and the second insert core 72 are made of the same material and have the same process. The raw material of the arc-shaped toothed plate 2 includes carbon 1.0%-1.8%, manganese 12%-20%, silicon 0.8%-1.2%, chromium 0.5%-1.5%, rare earth elements 0.5%-2.5%, and the balance is iron by mass percentage.

[0071] Both the hardened conical stage 31 and the second hardened conical stage 71 are made of zirconium oxide toughened alumina.

[0072] The formulation of modified high-manganese steel can meet the requirements of alloy tooth plates. The hardness can also be increased by changing the carbon content as needed, or by adding other elements according to performance requirements.

[0073] Zirconia-toughened alumina is a composite ceramic material in which zirconia (ZrO2) particles are dispersed within an alumina (Al2O3) matrix. Utilizing the phase transformation toughening and microcrack toughening effects of zirconia, it significantly improves the toughness and fracture strength of alumina ceramics. It combines the high hardness, high temperature resistance, and corrosion resistance of Al2O3 with the high toughness of ZrO2, making it a key structural material for extreme working conditions (such as high temperature, heavy load, and abrasion). The hardened conical truncated platform 31 and the second hardened conical truncated platform 71 are outer cladding layers, primarily designed to withstand the hardness requirements from significant external impacts. They are replaceable and can be easily repaired later, effectively achieving the hardness required for crushing and facilitating future maintenance and replacement.

[0074] A manufacturing process for the inlaid alloy toothed plate based on modified high-manganese steel, as described above, includes the following steps:

[0075] S1: Prepare modified high-manganese steel raw materials, heat the modified high-manganese steel raw materials in an electric arc furnace, introduce argon gas for protective heating, and cast the arc-shaped toothed plate 2, the insert core column 32 and the second insert core column 72 into different molds.

[0076] Zirconia-toughened alumina raw materials were prepared, and hard conical stage 31 and second hard conical stage 71 were prepared using ZTA preparation technology.

[0077] Tungsten carbide powder, cobalt and nickel powder and molding aids are mixed evenly, the mixed powder is added into a mold and hot-pressed, and then the molding aids are removed and sintered to prepare cemented carbide head 8 and toothed nail 4.

[0078] Preparation of expansion pads made of aluminum alloy 5;

[0079] S2: Tungsten carbide coating or nickel-based self-fluxing alloy coating is sprayed on the upper surface of the arc-shaped tooth plate 2, the outer surface of the hard conical platform 31 and the outer surface of the second hard conical platform 71, and titanium aluminum nitride coating is sprayed on the surface of the hard alloy head 8 and the protruding tooth 4.

[0080] S3: The rigid conical stage 31 is fitted onto the upper half of the insertion core 32 and fixed to form the toothed core body 3; the second rigid conical stage 71 is fitted onto the upper half of the second insertion core 72 and fixed to form the second toothed core body 7.

[0081] S4: Store the toothed column body 3, the second toothed column body 7, and the fixing components for mounting the toothed column body 3 and the second toothed column body 7 together in an environment of -100℃ to -80℃, and store the toothed pin 4, the expansion pad 5, and the carbide head 8 in an environment of -180℃ to -160℃.

[0082] S5: Multiple arc-shaped protrusions 22 are evenly spaced on the arc-shaped toothed plate 2. Tooth column crushing channels 23 are set between adjacent arc-shaped protrusions 22. Protrusion columns 21 are evenly spaced on the arc-shaped protrusions 22. Mounting bolt holes 221 are set on the arc-shaped protrusions 22 at the middle position of adjacent protrusion columns 21. Two rows of protruding nail grooves 24 are set on the upper surface of the arc-shaped toothed plate 2 at the position of each tooth column crushing channel 23.

[0083] Take out the cryogenically preserved tooth column body 3 one by one, put an expansion pad 5 on the insert core column 32, insert the insert core column 32 into the boss column 21, and fix the insert core column 32 with the fixing component on the back of the arc-shaped tooth plate 2 corresponding to the position of each boss column 21, so that the expansion pad 5 is squeezed by the hard conical platform 31 and the boss column 21. Install the tooth column body 3 one by one; take out the tooth nail 4 one by one and install it in each tooth nail groove 24. On the back of the arc-shaped tooth plate 2 corresponding to each tooth nail groove 24, use the connecting bolt 40 to connect to the bottom of the tooth nail 4 to fix the tooth nail 4, and complete the installation to form an inlaid alloy tooth plate one.

[0084] Take out the cryogenically preserved second tooth column body 7 one by one, put an expansion pad 5 on the second insertion core column 72, insert the second insertion core column 72 into the boss column 21, fix the second insertion core column 72 with a fixing component on the back of the arc-shaped tooth plate 2 corresponding to the position of each boss column 21, so that the expansion pad 5 is squeezed by the second hard conical platform 71 and the boss column 21, and install the second tooth column body 7 one by one; take out the tooth nail 4 one by one and install it in each tooth nail groove 24, and use connecting bolts 40 to connect to the bottom of the tooth nail 4 on the back of the arc-shaped tooth plate 2 corresponding to each tooth nail groove 24 to fix the tooth nail 4; take out the cryogenically preserved hard alloy head 8, insert the insertion part 82 of the lower half of the hard alloy head 8 one by one into the alloy head groove 711 on the top of the second hard conical platform 71, and screw the side fixing bolts 80 from the fixing bolt holes 712 provided on both sides of the second hard conical platform 71 into the insertion part 82 to complete the installation and assemble to form the inlaid alloy tooth plate two;

[0085] S6: When the inlaid alloy tooth plate one and inlaid alloy tooth plate two return to room temperature

[0086] Multiple inlaid alloy toothed plates are attached one by one to the crushing cylinder 1, and the first crushing drum is formed by using mounting bolts to install them on the crushing cylinder 1 through mounting bolt holes 221.

[0087] The inlaid alloy toothed plates are attached one by one to the crushing cylinder 1, and then installed on the crushing cylinder 1 through the mounting bolt holes 221 using mounting bolts to form a second crushing roller. The crushing cylinder 1 is provided with bolt holes 11 for mounting the toothed plates.

[0088] Modified high-manganese steel can be prepared using micro-alloying high-manganese steel preparation process, micro-alloying + surface modification high-manganese steel preparation process, or high-strength and ductile high-manganese steel preparation process. The existing technologies are relatively mature and will not be elaborated here.

[0089] The core technology for preparing zirconia-toughened alumina (ZTA) consists of three key processes: powder synthesis, green body forming, and sintering densification. The uniformity and particle size of the powder are fundamental to the performance of ZTA. The mainstream methods are divided into two categories: mechanical mixing and liquid-phase synthesis. The addition ratio of ZrO2 is usually controlled at 10%-20%.

[0090] Mechanical mixing method

[0091] Process steps: Add Al2O3, ZrO2 powder and Y2O3 stabilizer to a ball mill according to the specified ratio, and perform high-speed ball milling using zirconia balls as the grinding medium (planetary ball mill speed <500r / min, high-energy ball mill 500-1500r / min). After ball milling, spray dry to obtain composite powder.

[0092] I. Liquid-phase synthesis method

[0093] Coprecipitation method: Al 3+ and Zr 4+ Salt solutions are mixed in proportion, and the pH value is adjusted to 9-11 to generate hydroxide precipitate. After washing and drying, ZTA powder is obtained by calcination at 900-1100℃. Molecular-level mixing can be achieved, and the powder has high activity.

[0094] Sol-gel method: Using alkoxides as raw materials, a sol is formed through hydrolysis-condensation reaction, and a gel is obtained after aging. After drying and calcination (800-1000℃), nano-sized ZTA powder is obtained with a purity of over 99.9%. However, the process cycle is long and the cost is high.

[0095] Hydrothermal synthesis method: Metal salts are crystallized in a high-temperature and high-pressure (180-250℃, 2-5MPa) aqueous solution to directly generate ZTA powder with well-developed crystal grains. The particle size can be controlled within 100-200nm, and it has excellent sintering activity, but a high-pressure reactor is required.

[0096] II. ZTA preform forming technology

[0097] The forming process determines the density and defect distribution of the preform, and is mainly divided into two categories: dry process and wet process.

[0098] Dry molding

[0099] Dry pressing: ZTA powder is mixed with a small amount of binder and pressed in a mold with a pressure of 100-300MPa. It is suitable for preparing simple shaped blanks and has high production efficiency, but the density of the blanks is uneven.

[0100] Isostatic pressing: This method uses a liquid medium to apply a uniform pressure of 100-600 MPa to the powder, resulting in a blank density of over 90%. It is suitable for complex irregular-shaped parts and is the mainstream molding method for high-end ZTA products.

[0101] wet molding

[0102] Slurry casting: ZTA powder is prepared into a slurry with a solid content of 60%-70%, which is then injected into a plaster mold for dehydration and molding. It is suitable for preparing thin-walled and complex structural parts.

[0103] Injection molding: ZTA powder is mixed with thermoplastic binder and granulated, then injected into a mold through an injection molding machine. After molding, the binder needs to be removed by degreasing. It is suitable for mass production of precision parts.

[0104] III. ZTA Sintering Densification Technology

[0105] Sintering is the core technology for achieving densification and performance optimization of ZTA (zoom-tightening alumina). Temperature control is required to suppress abnormal grain growth. The mainstream sintering processes are as follows:

[0106] Atmospheric pressure sintering

[0107] Process parameters: Heat to 1550-1600℃ in air at a rate of 5-10℃ / min, hold for 2-4 hours, and the density of the green body can reach over 95%.

[0108] Hot pressing sintering process parameters: Sintering at 1400-1500℃ for 1-2 hours under a pressure of 20-50MPa, the density can reach over 99%.

[0109] Advanced sintering technology

[0110] Spark plasma sintering (SPS), microwave sintering, and hot isostatic pressing (HIP) sintering.

[0111] The raw materials for modified high-manganese steel include, by mass percentage, 1.0%-1.8% carbon, 12%-20% manganese, 0.8%-1.2% silicon, 0.5%-1.5% chromium, 0.5%-2.5% rare earth elements, with the balance being iron.

[0112] Preparation of cemented carbide head 8 and protruding tooth 4, raw material preparation and mixing:

[0113] Preparation of tungsten carbide powder

[0114] Tungsten oxide (WO3) obtained from tungsten ore refining is reacted with high-purity carbon black (purity > 99.5%, D50 particle size 30-50nm) in a hydrogen atmosphere at 1200-1800℃ to produce tungsten carbide (WC) powder. The reaction formula is: WO3 + 4C → WC + 3CO. Depending on the application of the cutting head, the particle size of the WC powder can be selected as 0.6-1.2μm (to meet the standards of precision cutting tools) or 5-30μm (to meet the level of tunnel boring machine cutting heads).

[0115] I. Composite Powder Mixing

[0116] According to the formula, WC powder is mixed with binder (cobalt powder, accounting for 5%-20%) and additives (such as Cr3C2, to improve wear resistance), and wet-milled using alcohol as the medium. A common ball-to-powder ratio is 5:1, the milling speed is 60 rpm, and the milling time is 2-48 hours (48 hours for precision cutting tools, only 2-4 hours for tunnel boring machine cutting heads) to ensure uniform powder dispersion. If improved pressing flowability is required, forming agents such as paraffin wax can be added.

[0117] II. Compression Molding

[0118] Powder pretreatment

[0119] The mixed slurry is spray-dried with the inlet temperature controlled at 200℃ and the outlet temperature at 90℃ to obtain granulated powder with a flowability of ≤25s / 50g and a bulk density of 2.8-3.2g / cm³.

[0120] Molding process

[0121] Dry pressing: Applying pressure of 200-400MPa in a mold to press the green body to a density of 55%-60%.

[0122] Isostatic pressing: For complex and irregularly shaped cutting heads (such as tunnel boring machine cutter heads), a liquid pressure of 100-600MPa is used for uniform pressing, resulting in higher blank density and fewer defects.

[0123] The raw materials for modified high-manganese steel include, by mass percentage, 1.0-1.8% carbon, 12-20% manganese, 0.8-1.2% silicon, 0.5-1.5% chromium, 0.5-2.5% rare earth elements, and the balance being iron.

[0124] In step S2, the tungsten carbide coating, nickel-based self-fluxing alloy coating, and titanium-aluminum nitride coating are all applied by multiple sprayings, and the composition of each spraying is changed to improve the performance of each coating layer.

[0125] Spraying methods such as flame spraying, high-speed flame spraying, and arc spraying are selected based on the characteristics of the spraying material and are existing technologies, so they will not be elaborated here.

[0126] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0127] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An inlaid alloy toothed plate based on modified high-manganese steel, characterized in that, The device includes multiple arc-shaped toothed plates (2) and a detachable toothed column assembly. Multiple arc-shaped bosses (22) are evenly spaced on the arc-shaped toothed plates (2). Toothed column crushing channels (23) are provided between adjacent arc-shaped bosses (22). Bosses (21) are evenly spaced on the arc-shaped bosses (22). The toothed column assembly is detachably installed on the bosses (21). Mounting bolt holes (221) are provided on the arc-shaped bosses (22) at the middle position of adjacent bosses (21). Two rows of protruding nail grooves (24) are provided on the upper surface of the arc-shaped toothed plates (2) at each toothed column crushing channel (23). Protruding toothed nails (4) are installed in the protruding nail grooves (24). The arc-shaped toothed plate (2) is integrally cast from modified high-manganese steel raw material; The toothed column assembly includes a toothed column body (3), an expansion pad (5), and a fixing component. The toothed column body (3) includes a plug-in core column (32) and a rigid conical platform (31). The top of the plug-in core column (32) is fitted with a rigid conical platform (31). The plug-in core column (32) is fitted with an expansion pad (5) and the plug-in core column (32) is inserted into the boss column (21) and fixed by the fixing component. The expansion pad (5) is squeezed by the rigid conical platform (31) and the boss column (21). The plug-in core column (32) is made of modified high manganese steel. The toothed nail (4) is a hard nail. The lower half of the toothed nail (4) inserts the rod body (42) into the toothed nail groove (24) and is fixed. The nail head (41) of the upper half of the toothed nail (4) is exposed outside the upper surface of the arc-shaped toothed plate (2). Multiple arc-shaped toothed plates (2) are sequentially spliced ​​and fixedly installed on the outer wall of the crushing cylinder (1); The center of the boss (21) is provided with a square insertion hole (211) that penetrates the arc-shaped toothed plate (2). The square insertion hole (211) is provided with a fixing plate groove (212) on the back of the arc-shaped toothed plate (2). The fixing component includes two first bolts (61) and a fixing base plate (6). The bottom of the insertion core (32) is provided with two first bolt holes. The toothed column body (3) and the fixing assembly are stored in an environment of -100℃ to -80℃, and the expansion pad (5) is stored in an environment of -180℃ to -160℃. The expansion pad (5) is put on the plug-in core column (32) and pressed against the hard conical platform (31). The plug-in core column (32) is inserted into the square plug hole (211). The two first bolts (61) pass through the fixing base plate (6) and are screwed into the corresponding first bolt holes. The fixing base plate (6) is stuck in the fixing plate groove (212). The insert core (32) and hard conical platform (31) in the tooth column body (3) are replaced by the second insert core (72) and the second hard conical platform (71). The height of the second hard conical platform (71) is less than that of the hard conical platform (31). The second hard conical platform (71) is fitted into the upper half of the second insert core (72). The top of the second hard conical platform (71) is provided with an alloy head groove (711). The two side walls of the alloy head groove (711) are provided with fixing bolt holes (712). A hard alloy head (8) is inserted into the alloy head groove (711). The hard alloy head (8) includes an integrally formed convex tooth head (81) and an insert part (82). The insert part (82) is interference-fitted into the alloy head groove (711) and the side fixing bolt (80) is screwed into the insert part (82) from the fixing bolt hole (712). When the toothed head (81) is in operation, it is located at the midline of the two rows of toothed nails (4) on the crushing channel (23) of the corresponding arc-shaped toothed plate (2), and the toothed head (81) does not contact the corresponding two rows of toothed nails (4).

2. The inlaid alloy toothed plate based on modified high-manganese steel according to claim 1, characterized in that, The outer surface of the arc-shaped toothed plate (2), the outer surface of the boss column (21), and the surface of the hard conical platform (31) are all coated with a wear-resistant coating, which is either a tungsten carbide coating or a nickel-based self-fluxing alloy coating.

3. The inlaid alloy toothed plate based on modified high-manganese steel according to claim 1, characterized in that, The cemented carbide head (8) and the protruding tooth (4) are made of the same material and process. The cemented carbide head (8) is made of tungsten carbide mixed with cobalt and nickel. The surfaces of the cemented carbide head (8) and the protruding tooth (4) are coated with titanium aluminum nitride coating.

4. The inlaid alloy toothed plate based on modified high-manganese steel according to claim 1, characterized in that, The bottom of the protruding nail groove (24) is provided with a connecting bolt hole (241) that penetrates the arc-shaped toothed plate (2). The bottom of the insert rod body (42) is provided with a second bolt hole. The protruding tooth nail (4) is stored in an environment of -180℃ to -160℃. The insert rod body (42) is inserted into the protruding nail groove (24) without contacting the bottom of the protruding nail groove (24). A connecting bolt (40) is inserted from the connecting bolt hole (241) on the back of the arc-shaped toothed plate (2) and screwed into the second bolt hole to fix the protruding tooth nail (4).

5. The inlaid alloy toothed plate based on modified high-manganese steel according to claim 1, characterized in that, The insert core (32) and the arc-shaped toothed plate (2) are made of the same material. The insert core (32) and the second insert core (72) are made of the same material and process. The raw material of the arc-shaped toothed plate (2) includes carbon 1.0%-1.8%, manganese 12%-20%, silicon 0.8%-1.2%, chromium 0.5%-1.5%, rare earth elements 0.5%-2.5%, and the balance is iron. Both the hard conical stage (31) and the second hard conical stage (71) are made of zirconium oxide toughened alumina.

6. A manufacturing process for an inlaid alloy toothed plate based on modified high-manganese steel as described in any one of claims 1-5, characterized in that, The steps are as follows: S1: Prepare modified high manganese steel raw materials, heat the modified high manganese steel raw materials in an electric arc furnace, introduce argon gas for protective heating, and cast arc-shaped toothed plates (2), insert core columns (32) and second insert core columns (72) into different molds. Zirconia-toughened alumina raw materials were prepared, and hard conical stage (31) and second hard conical stage (71) were prepared using ZTA preparation technology. Tungsten carbide powder, cobalt and nickel powder and molding aid are mixed evenly, the mixed powder is added into a mold for hot pressing, and then the molding aid is removed and sintered to prepare cemented carbide head (8) and toothed nail (4). Prepare expansion pads made of aluminum alloy (5); S2: Tungsten carbide coating or nickel-based self-fluxing alloy coating is sprayed on the upper surface of the arc-shaped tooth plate (2), the outer surface of the hard conical platform (31) and the outer surface of the second hard conical platform (71), and titanium aluminum nitride coating is sprayed on the surface of the hard alloy head (8) and the protruding tooth nail (4). S3: The hard conical platform (31) is fitted onto the upper half of the plug-in core (32) and fixed to form the toothed column body (3), and the second hard conical platform (71) is fitted onto the upper half of the second plug-in core (72) and fixed to form the second toothed column body (7). S4: Store the toothed column body (3), the second toothed column body (7) and the fixing components for mounting the toothed column body (3) and the second toothed column body (7) together in an environment of -100℃ to -80℃, and store the toothed pin (4), expansion pad (5) and carbide head (8) in an environment of -180℃ to -160℃. S5: Multiple arc-shaped bosses (22) are provided at equal intervals on the arc-shaped toothed plate (2), and tooth column crushing channels (23) are provided between adjacent arc-shaped bosses (22). Boss columns (21) are provided at equal intervals on the arc-shaped bosses (22). Mounting bolt holes (221) are provided on the arc-shaped bosses (22) at the middle position of adjacent boss columns (21). Two rows of protruding nail grooves (24) are provided on the upper surface of the arc-shaped toothed plate (2) at each position of the tooth column crushing channel (23). Take out the low-temperature preserved tooth column body (3) one by one, put an expansion pad (5) on the insert core column (32), insert the insert core column (32) into the boss column (21), fix the insert core column (32) with the fixing component on the back of the arc tooth plate (2) corresponding to each boss column (21), so that the expansion pad (5) is squeezed by the hard conical platform (31) and the boss column (21), and install the tooth column body (3) one by one; take out the tooth nail (4) one by one and install it in each tooth nail groove (24), and fix the tooth nail (4) on the back of the arc tooth plate (2) corresponding to each tooth nail groove (24) with the connecting bolt (40) to the bottom of the tooth nail (4) to complete the installation and combine to form an inlaid alloy tooth plate one; Take out the second tooth column body (7) that has been stored at low temperature one by one, put an expansion pad (5) on the second insertion core column (72), insert the second insertion core column (72) into the boss column (21), fix the second insertion core column (72) on the back of the arc-shaped tooth plate (2) corresponding to the position of each boss column (21) using the fixing component, so that the expansion pad (5) is squeezed by the second hard conical platform (71) and the boss column (21), and install the second tooth column body (7) one by one; take out the toothed nail (4) one by one and install it in each toothed nail groove (24), and install it in each of the above. The back of the arc-shaped toothed plate (2) corresponding to the convex nail groove (24) is connected to the bottom of the convex toothed nail (4) by connecting bolts (40) to fix the convex toothed nail (4). The low-temperature stored carbide head (8) is taken out, and the insert part (82) of the lower half of the carbide head (8) is inserted one by one into the alloy head groove (711) at the top of the second carbide conical platform (71). The side fixing bolts (80) are screwed into the insert part (82) from the fixing bolt holes (712) set on both sides of the second carbide conical platform (71) to complete the installation and assemble to form the second inlaid carbide toothed plate. S6: When the inlaid alloy tooth plate one and inlaid alloy tooth plate two return to room temperature Multiple inlaid alloy toothed plates are attached one by one to the crushing cylinder (1), and the first crushing drum is formed by using mounting bolts to install them on the crushing cylinder (1) through the mounting bolt holes (221); The two inlaid alloy toothed plates are attached one by one to the crushing cylinder (1), and the second crushing cylinder is formed by using the mounting bolts to install them on the crushing cylinder (1) through the mounting bolt holes (221).

7. The manufacturing process of an inlaid alloy toothed plate based on modified high-manganese steel according to claim 6, characterized in that, The modified high-manganese steel raw material comprises, by mass percentage, 1.0-1.8% carbon, 12-20% manganese, 0.8-1.2% silicon, 0.5-1.5% chromium, 0.5-2.5% rare earth elements, with the balance being iron.

8. The production process of an inlaid alloy toothed plate based on modified high-manganese steel according to claim 6, characterized in that, In step S2, the tungsten carbide coating, nickel-based self-fluxing alloy coating, and titanium aluminum nitride coating are all applied by multiple sprayings, with the composition of each spraying being changed to improve the performance of each coating layer.

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