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CN-121653537-B - High-wear-resistance impact-resistant lining plate and preparation method thereof

CN121653537BCN 121653537 BCN121653537 BCN 121653537BCN-121653537-B

Abstract

The invention discloses a high-wear-resistance impact-resistance lining plate and a preparation method thereof, and belongs to the technical field of wear-resistance lining plates. The high-wear-resistance impact-resistant lining plate comprises a substrate, wherein a wear-resistant layer is arranged above the substrate, and a transition layer is arranged between the wear-resistant layer and the substrate, wherein the wear-resistant layer comprises, by mass, 30% -85% of WC, 5% -70% of Co, 0.1% -0.2% of rare earth oxide and 2.0% -5.0% of Ni. The wear-resistant layer comprises a bottom layer, a middle layer and a surface layer, and the sizes and the contents of tungsten carbide particles in the bottom layer, the middle layer and the surface layer are distributed in a step-shaped manner. The high-wear-resistance impact-resistance lining plate and the preparation method thereof can solve the problems of poor impact resistance and poor wear resistance of the existing lining plate.

Inventors

  • ZHANG XUEFENG

Assignees

  • 河北同业冶金科技有限责任公司

Dates

Publication Date
20260508
Application Date
20251226

Claims (10)

  1. 1. A high-wear-resistance impact-resistant lining plate is characterized by comprising a base body, wherein a wear-resistant layer is arranged above the base body, a transition layer is arranged between the wear-resistant layer and the base body, the base body comprises, by mass, ：C：0.15%-0.2%,Mn：2.5%-3.2%,Si：1.0%-1.5%,Al：0.5%-1.3%,Cr：0.6%-0.9%,Mo：0.2%-0.3%,Ni：2.0%-3.0%,Cu：0.2%-0.3%,Ti：0.02%-0.08%, -0.015% of S, not more than 0.01% of P and the balance of Fe, the wear-resistant layer comprises, by mass, 30-85% of WC, 5-70% of Co, 0.1-0.2% of rare earth oxide, 2.0-5.0% of Ni, and the transition layer comprises, by mass, 0.7-1.1% of C, 15-17% of Cr, 3.5-5.0% of Si, 3.5-5.0% of B, 3.0-5.0% of Fe, 2-3% of MoC and the balance of Ni.
  2. 2. The high wear-resistant impact-resistant lining plate according to claim 1, wherein the wear-resistant layer comprises a bottom layer, a middle layer and a surface layer, the bottom layer is connected with the substrate through a transition layer, the thickness of the bottom layer is 0.5mm-1mm, the thickness of the middle layer is 0.5mm-1mm, and the thickness of the surface layer is 2mm-5mm.
  3. 3. The high wear-resistant impact-resistant lining plate according to claim 2, wherein the bottom layer comprises, by mass, 30% -40% of WC, 55% -65% of Co, 0.1% -0.2% of rare earth oxide, 4.0% -5.0% of Ni, the middle layer comprises, by mass, 50% -60% of WC, 35% -45% of Co, 0.1% -0.2% of rare earth oxide, 3.0% -4.0% of Ni, and the surface layer comprises, by mass, 70% -85% of WC, 10% -25% of Co, 0.1% -0.2% of rare earth oxide, and 2.0% -3.0% of Ni.
  4. 4. A highly wear-resistant impact-resistant lining board according to claim 3, wherein the particle size of WC in the bottom layer and the middle layer is 20-50 μm, and the WC in the surface layer comprises 60-70% by mass of tungsten carbide with a particle size of 5-10 μm and 30-40% by mass of tungsten carbide with a particle size of 0.5-1 μm.
  5. 5. The high wear-resistant impact-resistant lining plate according to claim 1, wherein the rare earth oxide is cerium oxide, the particle size is 2-5 μm, the particle size of cobalt powder is 5-10 μm, and the particle size of nickel powder is 2-5 μm.
  6. 6. The high abrasion resistant impact resistant backing plate of claim 1 wherein said transition layer has a thickness of 200 μm to 300 μm and MoC has a particle size of 10 μm to 20. Mu.m.
  7. 7. A method of making a highly abrasion resistant impact resistant liner as claimed in any one of claims 1 to 6, comprising the steps of: S1, preparing a substrate, weighing raw materials according to a mass ratio, adding the raw materials into a vacuum induction smelting furnace for smelting, casting after smelting is completed to obtain a plate blank, and carrying out hot rolling and heat treatment on the plate blank to obtain the substrate; s2, weighing the raw materials of the transition layer according to the mass ratio, ball-milling, mixing and drying the raw materials of the transition layer, and cladding the transition layer on the surface of the substrate through a laser cladding process under the protection of argon; s3, weighing raw materials of the wear-resistant layer according to the mass ratio, ball-milling, mixing and drying the raw materials of the wear-resistant layer, and sequentially cladding a bottom layer, a middle layer and a surface layer on the transition layer through a laser cladding process under the protection of argon to obtain a plate body; S4, preserving the temperature of the plate body at 180-200 ℃ for 2-4 hours, and cooling the plate body to room temperature along with a furnace to obtain the lining plate.
  8. 8. The method for preparing the high-wear-resistance impact-resistant lining plate according to claim 7, wherein in the step S1, the hot rolling is performed by heating a plate body to 1100-1200 ℃, keeping the temperature for 2-3 hours, wherein the initial rolling temperature is equal to or higher than 1050 ℃, the final rolling temperature is 700-800 ℃, the thickness of a hot rolled plate obtained by air cooling to room temperature is 10-15 mm, the heat treatment is performed by heating to 1100-1200 ℃ firstly, keeping the temperature for 2S-5S, then cooling to room temperature by water, keeping the temperature at 750-800 ℃ for 20min-30min, keeping the temperature at 250-400 ℃ for 10min-30min, and naturally cooling to room temperature.
  9. 9. The method for preparing the high-wear-resistance impact-resistant lining plate according to claim 7, wherein in the step S2, the laser cladding laser power is 1.0kW-1.4kW, the scanning speed is 6mm/S-8mm/S, the powder feeding speed is 15g/min-20g/min, and the interlayer temperature is not more than 200 ℃.
  10. 10. The method for preparing the high-wear-resistance impact-resistant lining plate according to claim 7, wherein in the step S3, the laser power of the bottom layer cladding is 1.2kW-1.4kW, the laser power of the middle layer cladding and the surface layer cladding is 1.5kW-1.8kW, the scanning speed is 5mm/S-7mm/S, the powder feeding speed is 15g/min-20g/min, and the interlayer temperature is not more than 200 ℃.

Description

High-wear-resistance impact-resistant lining plate and preparation method thereof Technical Field The invention relates to the technical field of wear-resistant lining plates, in particular to a high-wear-resistant impact-resistant lining plate and a preparation method thereof. Background The wear-resistant lining board is used as a core vulnerable part of crushing equipment and conveying equipment in industries such as mines, metallurgy, building materials, coal and the like, directly bears the impact, cutting and grinding actions of materials, and the wear resistance, impact resistance and interface combination stability of the wear-resistant lining board directly determine the operation efficiency, maintenance cost and service life of the equipment. In actual working conditions, impact load and abrasion action of materials often exist at the same time, and double core requirements of high abrasion resistance and high impact resistance are put forward on the lining plate. However, the wear-resistant lining plate in the prior art has the common problem that the performance is difficult to be compatible, namely the traditional single-material lining plate (such as high-carbon high-chromium steel and common alloy steel) has the advantages that the wear resistance is improved by improving the carbon content or adding alloy elements, but the toughness of a matrix is greatly reduced, brittle fracture and edge breakage are easy to occur under impact load, and the low-carbon steel lining plate with heavy toughness has the advantages of high wear speed and extremely short service life due to insufficient hardness. The prior patent CN202510177618.3 discloses a lining plate of a high-wear-resistance mixed pelletizer and a preparation method thereof, wherein the lining plate comprises a base layer and a wear-resistant layer compounded on the surface of the base layer, the base layer is made of high-strength alloy steel materials, and the wear-resistant layer comprises tungsten carbide particles, a composite alloy material and an adhesive. A tungsten carbide layer is sprayed on the surface of the base layer by adopting a thermal spraying process, so that the wear resistance of the lining plate is improved. However, in the above patent, a tungsten carbide layer is coated on the surface of the substrate by means of thermal spraying, the tungsten carbide is inorganic tungsten carbide, the bonding strength with the alloy steel of the substrate is relatively poor, the wear resistance of the lining plate is affected, the impact resistance of the substrate is relatively poor, and the service life of the lining plate under impact load is affected. Disclosure of Invention The invention aims to provide a high-wear-resistance impact-resistance lining plate and a preparation method thereof, and solves the problems of poor impact resistance and poor wear resistance of the existing lining plate. The invention provides a high-wear-resistance impact-resistance lining plate, which comprises a substrate, wherein a wear-resistance layer is arranged above the substrate, a transition layer is arranged between the wear-resistance layer and the substrate, the substrate comprises, by mass, ：C：0.15%-0.2%,Mn：2.5%-3.2%,Si：1.0%-1.5%,Al：0.5%-1.3%,Cr：0.6%-0.9%,Mo：0.2%-0.3%,Ni：2.0%-3.0%,Cu：0.2%-0.3%,Ti：0.02%-0.08%, -0.015% of S, 0.01-0.01% of P and the balance of Fe, the wear-resistance layer comprises, by mass, 30-85% of WC, 5-70% of Co, 0.1-0.2% of rare earth oxide, 2.0-5.0% of Ni, and the transition layer comprises, by mass, 0.7-1.1% of C, 15-17% of Cr, 3.5-5.0% of Si, 3.5-5.0% of B, 3.0-5.0% of Fe, 2-3% of MoC and the balance of Ni. Preferably, the wear-resistant layer comprises a bottom layer, a middle layer and a surface layer, the bottom layer is connected with the matrix through a transition layer, the thickness of the bottom layer is 0.5mm-1mm, the thickness of the middle layer is 0.5mm-1mm, and the thickness of the surface layer is 2mm-5mm. Preferably, the bottom layer comprises, by mass, 30% -40% of WC, 55% -65% of Co, 0.1% -0.2% of rare earth oxide, 4.0% -5.0% of Ni, the middle layer comprises, by mass, 50% -60% of WC, 35% -45% of Co, 0.1% -0.2% of rare earth oxide, 3.0% -4.0% of Ni, and the surface layer comprises, by mass, 70% -85% of WC, 10% -25% of Co, 0.1% -0.2% of rare earth oxide and 2.0% -3.0% of Ni. Preferably, the particle size of WC in the bottom layer and the middle layer is 20-50 mu m, and the WC in the surface layer comprises 60-70% of tungsten carbide with the particle size of 5-10 mu m and 30-40% of tungsten carbide with the particle size of 0.5-1 mu m by mass percent. Preferably, the rare earth oxide is cerium oxide with a particle size of 2-5 mu m, the cobalt powder with a particle size of 5-10 mu m and the nickel powder with a particle size of 2-5 mu m. Preferably, the thickness of the transition layer is 200-300 μm, and the particle size of the MoC is 10-20 μm. The preparation method based on the high-wear-resistance