High-hardness wear-resistant piston pin and preparation method thereof

A piston pin, high hardness technology, applied in the direction of piston, cylindrical piston, plunger, etc., can solve the problems of low material utilization rate, large internal stress of the coating, low service life, etc., to improve the bonding performance and high bonding strength. , the effect of good compatibility
CN112658262AActive Publication Date: 2021-04-16湖南英捷高科技有限责任公司
4 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖南英捷高科技有限责任公司
Publication Date
2021-04-16

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a high-hardness wear-resistant piston pin and a preparation method thereof. The preparation method comprises the following steps of firstly, respectively mixing matrix material powder and Co-Cr-W alloy powder with a binder, and performing granulation to obtain a matrix material feed and a high-hardness wear-resistant coating material feed; then, sequentially injecting the matrix material feed and the Co-Cr-W alloy coating material feed into a mold cavity by using an injection molding technology to obtain a product green body; removing the binder in the green body through catalytic debinding and thermal debinding processes; and finally, performing co-sintering densification to obtain the Co-Cr-W series high-hardness wear-resistant piston pin. The process is simple, the bonding performance of a coating layer and a matrix is good, and the piston pin has the characteristics of high hardness and wear resistance.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of preparation of wear-resistant materials, and in particular relates to a high-hardness wear-resistant piston pin and a preparation method thereof. Background technique

[0002] In recent years, the engine has been developing towards high power, high load and light weight, and higher requirements have been put forward for the weight, strength and reliability of the piston pin, which requires continuous improvement in structure and materials. Innovation and optimization. The piston pin is inside the cylinder, and forms high-speed motion during operation, with a large inertial force. Especially for high-speed engines, the reciprocating inertial force can reach more than 3000 times its own weight. The piston pin transmits load and motion during the working process, and the surface of the piston pin is worn. It is the main cause of piston pin failure.

[0003] The traditional piston pin is made of steel, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More