Structure and Properties of Restricted Hardenability GCr4 Bearing Steel

魏果能; 俞峰; 许达

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Structure and Properties of Restricted Hardenability GCr4 Bearing Steel

更新时间：2026-01-21

- Structure and Properties of Restricted Hardenability GCr4 Bearing Steel
- Special Steel Vol. 28, Issue 5, Pages: 4-6(2007)
- 作者机构：
  
  钢铁研究总院结构材料所,北京,100081
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：02 April 2007，
  
  Online First：13 February 2023，
  
  Published：13 February 2007
- 稿件说明：
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魏果能, 俞峰, 许达. Structure and Properties of Restricted Hardenability GCr4 Bearing Steel[J]. Special Steel, 2007, 28(5): 4-6.
DOI：

魏果能, 俞峰, 许达. Structure and Properties of Restricted Hardenability GCr4 Bearing Steel[J]. Special Steel, 2007, 28(5): 4-6. DOI：

摘要

试验研究了成分为:1.00%C、0.40%Cr、0.03%Mo、0.034%Al、10×10

-6

]

的GCr4轴承钢经感应穿透加热-表面淬火(840±10)℃+回火150～160℃后的组织和性能。结果表明

热处理后GCr4钢表面层由孪晶马氏体和位错马氏体组成

心部组织为屈氏体+索氏体。GCr4钢的淬透性(J60

3.0 mm)明显低于GCr15钢(1.01%C、1.52%Cr、11×10

-6

]

)的淬透性(J60

4.5 mm);其感应加热淬火+回火的冲击韧性和断裂韧性KIC分别比(840±10)℃淬火+(150～160)℃回火的GCr15钢提高66%～104%和67%。GCr4钢接触疲劳寿命较GCr15钢提高12%～26%。

Abstract

The structure and properties of GCr4 bearing steel- 1.00%C

0.40%Cr

0.03%Mo

0.034%Al

10 × 10

-6

]

heat treated by cross section induction heating and quenching (840±10)℃ + tempering (150～160 ℃) have been tested and researched. Results showed that after heat treated the case structure of CCr4 steel consisted of twinned martensite and dislocation martensite

and the core structure was troostite + sorbite. The hardenability of GCr4 steel(J60

3.0 mm)was markedly lower than that of GCr15 bearing steel- 1.01%C

1.52%Cr

11×10

-6

]

( J60

4.5 mm)

the impact toughness and fracture toughness Kc of GCr4 steel increased respectively by 66%～104% and 67% as compared with that of steel GCr15 heat treated by(840±10)℃ quenching +(150~160)℃ tempering

and the contact fatigue life of steel GCr4 increased by 12%～26% as compared with that of steel CCr15

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