国外文献 > 1.轴承 > 3. 材料与制造 > 轴承材料
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| 标 题： |
Bearing Steels for Induction Hardening - Part II
感应淬火用轴承钢 - 第二部分 |
| 作 者： |
M. Wendel
F. Hoffmann
W. Datchary |
| 关键词： |
Induction hardening [感应淬火]
Bearing steel [ 轴承钢]
Spring steel [ 弹簧钢]
67SiCr5 [ 67SiCr5]
70Mn4 [ 70Mn4]
Ovako 677L [ Ovako 677L] |
| 出版年： |
2016 |
| 期刊名： |
HTM
- |
| 年卷期： |
2016, vol.71, no.5 |
| 摘 要： |
Surface induction hardening, through induction hardening, and induction tempering of components like rolling elements or rings are established in production and are further developed in research and development. Among others, the used steel grade for induction hardening is one important factor affecting the induction hardening result. The present study benchmarks potential and existing bearing steels in terms of their induction hardening response. Steel grades with low to high carbon contents and different alloying strategies were selected. The robustness of the heat treatment result depending on the selected steels and their conditions prior to induction hardening, shall be pointed out. A dilatometer study was used to compare the sensitivity of martensite start temperature (M_S), hardness after quenching, prior austenite grain size, and appearance of non-martensitic transformation products, for varied process parameters. The study showed the pronounced effect of the steels' prior microstructure, prior to induction hardening, on the hardening response. The alloying with silicon and manganese reduced the amount of non-martensitic transformation products after hardening. Increasing amounts of alloying elements led in general to larger changes in M_S temperature and lower hardness after hardening.
在生产中，滚子或环等部件的表面感应淬火、感应淬火及感应回火已得到应用，并在研发领域进一步发展。其中，感应淬火所用的钢种是影响淬火效果的重要因素之一。本研究对现有和潜在轴承钢的感应淬火响应特性进行了对比分析。选取了含碳量从低到高以及不同合金化策略的钢种。研究指出，热处理结果的稳定性取决于所选钢种及其感应淬火前的组织状态。采用膨胀仪试验，比较了马氏体开始温度（M_S）、淬火后硬度、奥氏体晶粒尺寸以及非马氏体相变产物的形态在不同工艺参数下的敏感性。研究表明，感应淬火前钢材的原始微观组织对其淬火响应具有显著影响。硅和锰的合金化可减少淬火后非马氏体相变产物的数量。增加的合金元素通常会导致淬火后M_S温度变化更大，硬度降低。 |
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