| 引用本文: | 蔡培雷,汪宏斌,陈 卓.强化处理对GCr15钢球残余应力和微观组织的影响[J].材料科学与工艺,2013,21(6):144-148.DOI:10.11951/j.issn.1005-0299.20130624. |
| CAI Pei-lei,WANG Hong-bin,CHEN Zhuo.Influence of strengthening treatment on residual stress and microstructure of GCr15bearing steel ball[J].Materials Science and Technology,2013,21(6):144-148.DOI:10.11951/j.issn.1005-0299.20130624. |
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| 摘要: |
| 实验研究了强化处理后钢球残余应力和微观组织的改变．本文研究了经强化处理后,钢球沿径向表面残余应力大小、残余奥氏体含量及硬度分布;用光学显微镜、扫描电子显微镜对经表面形变强化后的轴承钢球进行显微组织及裂纹观察．研究表明:轴承钢球次表层残余应力为压应力,随电解抛光深度的增加,逐渐会出现一个最大压应力的峰值,而后压应力值逐渐减小．强化处理过程中会发生应力诱发残余奥氏体转变为马氏体,但对压应力分布影响不大．将静态Herzt接触理论应用于钢球的动态碰撞强化中,分析探讨钢球裂纹的形成,与实验结果相一致,具有重要指导意义． |
| 关键词: 轴承钢 残余应力 微观组织 性能 |
| DOI：10.11951/j.issn.1005-0299.20130624 |
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| Influence of strengthening treatment on residual stress and microstructure of GCr15bearing steel ball |
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CAI Pei-lei, WANG Hong-bin, CHEN Zhuo
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(School of Materials Science and Engineering, Shanghai University, Shanghai, 200072)
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| Abstract: |
| After surface strengthening treatment, the distribution of residual stress, content of residual austenite and hardness distribution on surface layer of GCr15bearing steel balls of were measured, and the microstructure and crack of surface layer were observed by optical microscopy, scanning electron microscopy. The results showed that the surface residual stress of bearing steel balls was compressive stress. With electrolytic polishing depth increased, the compressive stress would increase gradually to the peak value, and then decreased gradually. Stress induced residual austenite transformed to martensite in strengthening treatment, which had little effect on stress distribution. Static Herzt contact theory is applied to dynamic collision of steel ball to analyze stress and formation of crack, which is consistent with the experimental results. |
| Key words: bearing steel ball residual stress microstructure property |
