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A manufacturing process method for improving bearing ring performance

A manufacturing process and bearing ring technology, which is applied in the field of manufacturing process to improve the performance of bearing rings, can solve the problems of short service life, low impact energy and fracture toughness of bearing rings and other mechanical properties

Active Publication Date: 2018-08-07
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the production of bearing rings is usually finished after forging, quenching and tempering. The bearing rings manufactured in this way have low mechanical properties such as impact energy and fracture toughness, and the service life of the bearing rings is short.

Method used

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  • A manufacturing process method for improving bearing ring performance
  • A manufacturing process method for improving bearing ring performance
  • A manufacturing process method for improving bearing ring performance

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Embodiment Construction

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] The illustration takes GCr15 bearing steel bearing ring as an example to improve the impact energy and fracture toughness of the bearing ring by rolling and forming pre-quenching process.

[0023] Step 1: Roll and form deep groove ball bearing rings with 30-40% deformation on D56G90CNC ring rolling machine, such as figure 1 As shown, the microstructure of the bearing ring is refined by rolling forming, and the crystal defects such as dislocations and substructures in the material are increased to significantly increase the recrystallization nucleation position, which is for the subsequent heat treatment to improve the dynamic recrystallization nucleation rate and pre-quenching to form fine particles. Martensitic ...

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Abstract

The invention relates to a manufacturing process method for increasing bearer ring performance. The manufacturing process method comprises the following steps: S1) rolling a bearer ring blank on a cold ring-rolling mill for shaping; S2) heating the rolled bearer ring to the temperature of 800-900 DEG C, insulting the bearer ring for 10-20 min and austenitizing the bearer ring; placing the bearer ring in nitrate bath at the temperature of 150-250 DEG C for pre-quenching processing for 5-10 min; S3) heating the bearer ring after pre-quenching to the temperature of 200-300 DEG C, insulating the bearer ring for 15-25 min and performing isothermal quenching on the bearer ring, then performing isothermal processing on the bearer ring in quenching oil at temperature of 50-100 DEG C for 5-10 min; and S4) performing low-temperature tempering processing on the bearer ring after isothermal quenching for 1-2 hours, and then performing air cooling on the material. According to the invention, impact energy and fracture toughness of the bearer ring can be obviously increased through quenching, isothermal quenching and tempering processes.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, and more specifically relates to a manufacturing process method for improving the performance of a bearing ring. Background technique [0002] At present, the production of bearing rings is usually finished after forging, quenching and tempering. The bearing rings manufactured in this way have low mechanical properties such as impact energy and fracture toughness, and the service life of the bearing rings is short. Wang Jianli et al. formed a martensite and bainite multiphase structure in the material of the bearing ring by pre-quenching to improve the impact energy and fracture toughness of the bearing ring. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a manufacturing process method for improving the performance of the bearing ring, which can significantly improve the impact energy and fracture toughness of the be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/40C21D1/607C21D1/20C21D1/58C21D1/18C21D8/00
CPCC21D1/18C21D1/20C21D1/58C21D1/607C21D8/005C21D9/40C21D2211/002C21D2211/008
Inventor 华林邓松
Owner WUHAN UNIV OF TECH
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