Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and formed part for heat treatment of steel for bearing manufacture

A heat treatment method and technology for forming parts, applied in the field of forming parts and steel, can solve the problems of easy cracking, bearing damage, limiting the use range of bearings, etc., and achieve the effect of high hardness

Active Publication Date: 2018-01-09
NORTHEASTERN UNIV LIAONING
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a small amount of retained austenite makes the bearing very prone to cracks when subjected to a large external force, and even directly leads to bearing damage
This severely limits the scope of use of bearings made of GCr15 bearing steel

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and formed part for heat treatment of steel for bearing manufacture
  • Method and formed part for heat treatment of steel for bearing manufacture
  • Method and formed part for heat treatment of steel for bearing manufacture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be further described below in conjunction with accompanying drawing.

[0037] First, let’s explain the steel composition of the steel. The content of each steel element below is by weight.

[0038] C: 1.22-1.6%

[0039] Carbon is the cheapest strengthening element, which can increase the hardness of steel through interstitial solid solution and dispersion strengthening. When the carbon content is lower than 1.22%, during the austenitization process, the cementite is completely dissolved and there will be some ferrite remaining after the austenite is removed, which will reduce the hardness of the steel and deteriorate the toughness of the steel; and low The carbon content is not conducive to improving the hardness of martensite. When the carbon content is higher than 1.6%, the carbon will increase the tendency to form network carbides, which will cause the steel and the bearing made of steel to deteriorate the bearing performance due to the i...

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

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to steel materials for the manufacture of bearings, methods for heat treating them and formed parts. The steel material according to the present invention includes, by weight content, 1.22-1.6% C, 0.5-2% Cr, 4-8% Al, 0.1-1.5% Mn and less than or equal to 0.7% Si, The balance is Fe and impurities. This type of steel contains more carbon and aluminum. The molded parts or bearings that use this kind of steel and undergo the heat treatment method of the present invention contain more martensite and more retained austenite, which makes the molded parts or bearings have high hardness and are resistant to external impact. No cracks will occur.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a steel product. The invention also relates to a method for heat treating such steel. The invention also relates to a molded part. Background technique [0002] Bearing is an important part of mechanical equipment, its function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. With the development of science and technology, bearings that can withstand high speed, high load, high temperature, low temperature and low noise are often required in some special equipment. This requires bearing steel to have high dimensional stability, high hardness, high strength, excellent rolling contact fatigue performance and wear resistance. [0003] In the prior art, GCr15 bearing steel is a commonly used high-hardness bearing steel, and its carbon content is between 0.95% and 1.05% by weight. After quenching heat ...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C38/18C22C38/04C22C38/02C22C38/12C22C38/14C22C38/08C22C38/16C21D6/00F16C33/58F16C33/30
CPCC21D6/00C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18F16C33/30F16C33/58
Inventor 易红亮庞佳琛
Owner NORTHEASTERN UNIV LIAONING