| 42CrMoA钢销轴调质开裂失效分析及改进措施 |
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| 引用本文： | 蒋庆彬,张左治,朱正伟,周运杰.42CrMoA钢销轴调质开裂失效分析及改进措施[J].金属热处理,2020,45(9):244-247. |
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| 作者姓名： | 蒋庆彬 张左治 朱正伟 周运杰 |
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| 作者单位： | 三一重工股份有限公司,湖南 长沙 410100 |
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| 摘 要： | 通过裂纹的宏观和微观观察,采用化学成分分析、硬度测试及显微组织检验等方法,对42CrMoA钢销轴调质开裂的原因进行了分析。结果表明,销轴端面螺纹孔处的裂纹是淬火裂纹,主要原因是原材料组织不合格、淬火介质冷速过快、零件结构不合理等多方面导致的淬火开裂。通过对原材料、淬火介质、产品结构三方面进行优化,避免了销轴的淬火开裂。
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| 关 键 词： | 42CrMoA钢 销轴 失效分析 裂纹 |
| 收稿时间： | 2020-03-11 |
Failure analysis and improvement measures of quenched and tempered crack on42CrMoA steel pin shaft |
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| Jiang Qingbin,Zhang Zuozhi,Zhu Zhengwei,Zhou Yunjie.Failure analysis and improvement measures of quenched and tempered crack on42CrMoA steel pin shaft[J].Heat Treatment of Metals,2020,45(9):244-247. |
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| Authors: | Jiang Qingbin Zhang Zuozhi Zhu Zhengwei Zhou Yunjie |
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| Affiliation: | Sany Heavy Induystry Co.,Ltd.,Changsha Hunan 410100,China |
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| Abstract: | Causes of cracking of 42CrMoA steel pin shaft after quenching and tempering were analyzed by means of macroscopic and microscopic observation,chemical composition analysis,hardness test and microstructure test.The results show that the crack at the end thread hole of the pin shaft is due to quenching,which is mainly caused by unqualified raw material structure,too fast cooling rate of quenching medium and unreasonable structure design of parts.By optimizing the material,quenching medium and product structure,the quenching cracking of the pin shaft is avoided. |
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| Keywords: | 42CrMoA steel pin shaft failure analysis crack |
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