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Ion beam and cryogenic composite strengthening method for M50 bearing steel

A technology of bearing steel and ion beam, which is applied in the field of composite strengthening of ion beam and cryogenic treatment, can solve the problems that cannot meet the strength and toughness characteristics of M50 bearing steel, and cannot meet the wear resistance and fatigue resistance of M50 bearing steel, so as to improve the strengthening Depth, increase strength and toughness, reduce pollution effect

Inactive Publication Date: 2017-10-24
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for composite strengthening of M50 bearing steel by ion beam and cryogenic treatment, which overcomes the fact that the strengthening effect of the existing ion implantation strengthening material technology is only limited to the surface layer of the material and cannot meet the strength and toughness characteristics of M50 bearing steel. And single cryogenic strengthening treatment cannot meet the shortcomings of the high wear resistance and fatigue resistance of M50 bearing steel; the method of the present invention can greatly improve the ion implantation layer depth and sub-deep surface layer strengthening depth of M50 bearing steel material, and improve its toughness , hardness, wear resistance, and fatigue resistance, forming a strong and tough integrated material modification layer, overcoming the shortcomings of the single use of the two technologies, and having a synergistic strengthening effect

Method used

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  • Ion beam and cryogenic composite strengthening method for M50 bearing steel
  • Ion beam and cryogenic composite strengthening method for M50 bearing steel
  • Ion beam and cryogenic composite strengthening method for M50 bearing steel

Examples

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Embodiment 1

[0074]First, use metal degreasing solvent to remove the grease on the M50 bearing steel material, so that there is no grease on the surface, then put the M50 bearing steel material to be treated into non-polluting tetrachlorethylene and soak it for 30 minutes, then take it out, and use rice paper to absorb the residue After the solvent is removed, wipe it with clean silk; then soak and clean the M50 bearing steel material with metal derusting solvent for 15 minutes to remove the rust spots on the surface of the material; then put it in acetone, ultrasonically clean it for 10 minutes, take it out and wipe it with a clean silk cloth Dry; finally soak and clean the M50 bearing steel material with a metal cleaning agent with organic matter removal function for 10 minutes, so that no organic matter remains on the surface of the metal sample, and then put the treated M50 bearing steel material into deionized water and ultrasonically clean it for 20 minutes Finally, take them out, scr...

Embodiment 2

[0076] First, use metal degreasing solvent to remove the grease on the M50 bearing steel material, so that there is no grease on the surface, then put the M50 bearing steel material to be treated into non-polluting tetrachlorethylene and soak it for 30 minutes, take it out, and absorb it with lens paper After the solvent remains, wipe it with clean silk; then soak and clean the M50 bearing steel material with a metal derusting solvent for 15 minutes to remove the rust spots on the surface of the material; then put it in acetone, ultrasonically clean it for 10 minutes, and take it out with a clean silk cloth ) to dry; finally soak and clean the M50 bearing steel material with a metal cleaning agent with organic matter removal function for 10 minutes, so that no organic matter remains on the surface of the metal sample, and then put the treated M50 bearing steel material into deionized water and ultrasonically clean it Take it out after 20 minutes, wipe it with a clean silk cloth...

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Abstract

The invention discloses an ion beam and cryogenic composite strengthening method for M50 bearing steel. The cryogenic composite strengthening method comprises the following steps that (1), vacuum heat treatment is conducted on the bearing steel through low-energy large-beam gas ions; (2), cryogenic strengthening processing is conducted on the bearing steel obtained in the first step through liquid nitrogen; (3), the bearing steel processed in the second step is cleaned through gas ion beams; and (4), by the adoption of an ion implantation method, gas ions and metal ions are alternately injected into the surface of the bearing steel processed in the third step by the adoption of an ion injection method till the bearing steel is strengthened. According to the method, the ion injection layer depth and the sub deep surface layer strengthening depth of the M50 bearing steel material are increased greatly by the adoption of thermal processing and cold processing in combination with the ion injection strengthening technology, the friction wear performance and fatigue resistance performance of the M50 bearing steel are improved, and the strong and tough integrated material modified layer is formed.

Description

technical field [0001] The invention relates to an ion beam and cryogenic treatment composite strengthening method for M50 bearing steel, which belongs to the intersection field of cryogenic treatment and ion beam surface strengthening of metal materials. Background technique [0002] One of the characteristics of high-end bearings is that the bearings have high precision, long service life, high wear resistance and fatigue resistance, and surface modification is a quick and effective way to improve bearing performance. Take the main bearing of an aero-engine as an example. The main bearing is one of the key components of an aero-engine. It operates under high-speed, high-temperature, and complex stress conditions. The quality and performance of the main bearing directly affect the performance, life and reliability of the engine. One of the key indicators of an engine is high reliability. To ensure reliability, one of the prerequisites is to ensure that the bearings in the ...

Claims

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Application Information

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IPC IPC(8): C23C14/48C21D1/38C21D1/773C21D6/04C23C14/02
CPCC23C14/48C21D1/38C21D1/773C21D6/04C23C14/022
Inventor 金杰邵天敏
Owner TSINGHUA UNIV
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