| 碳含量及冷却速率对钢件淬火残余应力的影响 |
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| 引用本文： | 李阳,张建伟,朱鹏凯,杨扬.碳含量及冷却速率对钢件淬火残余应力的影响[J].金属热处理,2022,47(6):192-195. |
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| 作者姓名： | 李阳 张建伟 朱鹏凯 杨扬 |
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| 作者单位： | 1.陕西法士特汽车传动集团有限责任公司, 陕西 西安 710119;2.西安聚能高温合金材料科技有限公司, 陕西 西安 710299 |
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| 摘 要： | 研究了直径为ø12 mm、长度为50 mm的SAE8620、SAE8625及SAE8627钢试棒淬火后表面残余应力与碳含量及冷却速率的关系。研究结果表明在渗碳淬火处理后零件表面均为残余压应力,其值大小在200~600 MPa;随着碳含量和冷却速率的增加,心部硬度值增加,表面残余压应力值减小;同种碳含量的试样心部硬度相同时,冷却速率越高,表面残余压应力的值越小;采用较低的冷却速率有利于提高表面的残余压应力。
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| 关 键 词： | 碳含量 冷却速率 显微组织 硬度 残余应力 |
| 收稿时间： | 2022-01-14 |
Effect of carbon content and cooling rate on quenching residual stress of steel parts |
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| Li Yang,Zhang Jianwei,Zhu Pengkai,Yang Yang.Effect of carbon content and cooling rate on quenching residual stress of steel parts[J].Heat Treatment of Metals,2022,47(6):192-195. |
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| Authors: | Li Yang Zhang Jianwei Zhu Pengkai Yang Yang |
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| Affiliation: | 1. Shaanxi Fast Auto Drive Group Co., Ltd., Xi'an Shaanxi 710119, China; 2. Xi'an Superalloy Technology Co., Ltd., Xi'an Shaanxi 710299, China |
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| Abstract: | Relationship between surface residual stress and carbon content as well as the cooling rate of SAE8620, SAE8625 and SAE8627 steel bars with diameter of ø12 mm and the length of 50 mm after quenching was studied. The results show that the residual stress is compressive stress and the value is about 200-600 MPa. The value of compressive stress decreases with the increase of carbon content and the cooling rate,while the relationship between compressive stress value and core hardness is just the opposite. The higher the cooling rate is, the smaller the residual compressive stress is for the same core hardness of the same carbon content test piece. Thus, adopting lower cooling rate is beneficial to increase the residual compressive stress on the surface. |
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| Keywords: | carbon content cooling rate microstructure hardness residual stress |
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