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CN-121972656-A - Metal-based ceramic composite wear-resistant material and preparation process thereof

CN121972656ACN 121972656 ACN121972656 ACN 121972656ACN-121972656-A

Abstract

The invention provides a metal-based ceramic composite wear-resistant material and a preparation process thereof, and belongs to the technical field of metal-based ceramic materials. According to the invention, through the two-stage cladding and low-temperature ultrasonic relaxation cooperative treatment of ceramic particles, a carboxylated carbon nano tube flexible layer and a metal Ti reinforcing layer are formed on the surfaces of the ceramic particles, then mixed with metal matrix powder for molding and sintering, and finally, the ceramic particles are subjected to 15-25 ℃ ultrasonic relaxation treatment. The process effectively inhibits the initiation of low-temperature aging microcracks, the number of microcracks is only 1.8 microcracks/mm 2 after the material is aged for 1000 hours at-10 ℃, the interface bonding strength reaches 256.7MPa, the wear-resisting property attenuation rate is only 9.9%, and the process can be stably adapted to mining machinery scenes in alpine regions.

Inventors

  • ZHANG XIAOFENG
  • LI LUN
  • MA YONGFU

Assignees

  • 北京中航天佑科技有限公司

Dates

Publication Date
20260505
Application Date
20260205

Claims (10)

  1. 1. The preparation process of the metal-based ceramic composite wear-resistant material is characterized by comprising the following steps of: s1, providing ceramic particles, and performing double-stage coating on the ceramic particles: forming a first coating layer on the surface of the ceramic particles, and forming a second coating layer on the surface of the first coating layer to obtain the double-stage coated ceramic particles; the first coating layer is a carboxylated carbon nanotube layer, and the second coating layer is a metal Ti layer; S2, mixing the two-stage coated ceramic particles with metal matrix powder, molding and sintering to obtain a composite material; s3, performing ultrasonic relaxation treatment on the composite material at 15-25 ℃ to obtain the metal matrix ceramic composite wear-resistant material.
  2. 2. The preparation process according to claim 1, wherein the carboxylated carbon nanotube layer has a thickness of 50-120 nm and the metallic Ti layer has a thickness of 200-300 nm.
  3. 3. The manufacturing process according to claim 1, wherein the ceramic particles comprise one of Al 2 O 3 particles, zrO 2 particles, or SiC particles; the particle size of the ceramic particles is 5-15 mu m.
  4. 4. The manufacturing process according to claim 3, wherein the metal matrix powder comprises at least one of Q235 steel powder, TC4 titanium alloy powder or Fe-Cr-Mo alloy powder; the particle size of the metal matrix powder is 20-40 mu m.
  5. 5. The manufacturing process according to claim 4, wherein the volume of the dual-stage coated ceramic particles is 12-18% of the sum of the volume of the dual-stage coated ceramic particles and the volume of the metal matrix powder.
  6. 6. The process of claim 1, wherein forming the first coating layer on the surface of the ceramic particles comprises: dispersing ceramic particles in deionized water, adding carboxylated carbon nanotubes and a dispersing agent, and stirring and reacting for 3-5 hours at 50-70 ℃ under the protection of inert gas; After the reaction, the mixture was centrifuged and dried in vacuo to form a first coating layer.
  7. 7. The preparation process according to claim 6, wherein the mass of the carboxylated carbon nanotubes is 0.5-1.0wt% of the mass of the ceramic particles, and the mass of the dispersant is 0.2-0.5wt% of the mass of the ceramic particles.
  8. 8. The process of claim 1, wherein forming the second cladding layer on the surface of the first cladding layer comprises: And sputtering Ti on the surface of the first coating layer by using a magnetron sputtering process to form a second coating layer.
  9. 9. The preparation process according to claim 1, wherein the ultrasonic relaxation treatment is performed on the composite material at 15-25 ℃ to obtain the metal-based ceramic composite wear-resistant material, comprising the following steps: Firstly, applying 18-22 kHz ultrasonic vibration to the composite material at 15-25 ℃ for 20-30 hours, and naturally cooling to room temperature to obtain the metal-matrix ceramic composite wear-resistant material.
  10. 10. A metal matrix ceramic composite wear resistant material made by the process of any one of claims 1-9.

Description

Metal-based ceramic composite wear-resistant material and preparation process thereof Technical Field The invention relates to the technical field of metal-based ceramic materials, in particular to a metal-based ceramic composite wear-resistant material and a preparation process thereof. Background The metal-based ceramic composite wear-resistant material has both metal toughness and ceramic high wear resistance, and is widely applied to key parts such as lining plates of mining machinery crushers in northern alpine regions. Such a scenario requires that the material withstand a low-temperature storage/service environment of-10-25 ℃ for a long period of time, and simultaneously withstand complex loads such as friction, impact, fluid flushing and the like, and strict requirements are put on low-temperature aging stability and wear durability. The prior study on macroscopic properties such as multi-focus high-temperature service stability, normal-temperature interface bonding strength and the like neglects aging behavior in a low-temperature scene. For the composite material prepared by powder metallurgy-sintering, the inherent thermal expansion coefficient difference of ceramic particles and a metal matrix can form interface residual stress in a sintering cooling stage, and in the subsequent low-temperature aging process, the metal matrix generates micro martensitic transformation or lattice relaxation, so that the residual stress is further accumulated and concentrated to the edges of the ceramic particles, micro-area wedges with stress distributed in a wedge shape along the edge angle interface micro-gaps of the ceramic particles are formed, and finally, 100-500 nm-level interface microcracks are initiated. The microcracking is difficult to detect by routine detection, the initial stage does not cause macroscopic failure, only the wear resistance is slow and attenuated, the wear resistance is easy to be ignored for a long time due to normal wear, the wear resistance of the existing material is easy to be attenuated in an early stage under a low-temperature scene, and the long-term stable service requirement of key parts cannot be met. Disclosure of Invention In order to improve the aging stability and wear-resistant durability of the existing metal-based ceramic composite wear-resistant material in a low-temperature service/storage scene, the invention provides the metal-based ceramic composite wear-resistant material and a preparation process thereof, and the ceramic particles are subjected to two-stage in-situ cladding and low-temperature ultrasonic relaxation cooperative treatment after sintering to inhibit interface micro-area stress wedge cracking induced by low-temperature aging, so that the effective control of early attenuation of the wear-resistant performance of the material is realized, and the long-term stable service of the material in a low-temperature complex load environment is ensured. The invention aims at providing a preparation process of a metal-based ceramic composite wear-resistant material, which comprises the following steps of: s1, providing ceramic particles, and performing double-stage coating on the ceramic particles: forming a first coating layer on the surface of the ceramic particles, and forming a second coating layer on the surface of the first coating layer to obtain the double-stage coated ceramic particles; the first coating layer is a carboxylated carbon nanotube layer, and the second coating layer is a metal Ti layer; S2, mixing the two-stage coated ceramic particles with metal matrix powder, molding and sintering to obtain a composite material; s3, performing ultrasonic relaxation treatment on the composite material at 15-25 ℃ to obtain the metal matrix ceramic composite wear-resistant material. Preferably, the thickness of the carboxylated carbon nanotube layer is 50-120 nm, and the thickness of the metal Ti layer is 200-300 nm. Preferably, the ceramic particles comprise one of Al 2O3 particles, zrO 2 particles, or SiC particles; the particle size of the ceramic particles is 5-15 mu m. Preferably, the metal matrix powder comprises at least one of Q235 steel powder, TC4 titanium alloy powder or Fe-Cr-Mo alloy powder; the particle size of the metal matrix powder is 20-40 mu m. Preferably, the volume of the dual-stage coated ceramic particles is 12-18% of the sum of the volume of the dual-stage coated ceramic particles and the volume of the metal matrix powder. Preferably, the forming the first coating layer on the surface of the ceramic particle includes the steps of: dispersing ceramic particles in deionized water, adding carboxylated carbon nanotubes and a dispersing agent, and stirring and reacting for 3-5 hours at 50-70 ℃ under the protection of inert gas; After the reaction, the mixture was centrifuged and dried in vacuo to form a first coating layer. Preferably, the mass of the carboxylated carbon nano tube is 0.5-1.0wt% of the mass of the ceramic particles, and