| 40CrMnMo钢轴心管淬火开裂原因分析及预防措施 |
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| 引用本文： | 孔学云,马认琦,于海永,刘景超,张小玲,杨志国. 40CrMnMo钢轴心管淬火开裂原因分析及预防措施[J]. 金属热处理, 2010, 35(2) |
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| 作者姓名： | 孔学云 马认琦 于海永 刘景超 张小玲 杨志国 |
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| 作者单位： | 中海油能源发展监督监理技术公司,工程技术研究中心,天津,300452 |
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| 摘 要： | 通过对40CrMnMo钢石油工具轴心管淬火裂纹形态、材质成分、金相组织进行观察与分析,结果表明奥氏体化温度偏高、淬火油温偏低、冷却时间较长,是造成工件淬火开裂的主要原因,同时原材料中的带状组织也加大了淬火开裂倾向。针对这一现象,文中提出了相应的改进措施。
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| 关 键 词： | 40CrMnMo 淬火开裂 带状组织 |
Analysis on quenching crack of 40CrMnMo steel center tube and its countermeasures |
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| KONG Xue-yun,MA Ren-qi,YU Hai-yong,LIU Jing-chao,ZHANG Xiao-ling,YANG Zhi-guo. Analysis on quenching crack of 40CrMnMo steel center tube and its countermeasures[J]. Heat Treatment of Metals, 2010, 35(2) |
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| Authors: | KONG Xue-yun MA Ren-qi YU Hai-yong LIU Jing-chao ZHANG Xiao-ling YANG Zhi-guo |
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| Affiliation: | Engineering Technology Research & Design Center;China National Offshore Oil Company Energy Technology & Services Supervision & Technology Co.;Tianjin 300452;China |
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| Abstract: | The quenching crack morphology,chemical composition and microstructure of the 40CrMnMo steel center tube for oil drill tools were observed and analyzed.The results show that the main reasons of quenching crack are upper austenizing temperature,lower temperature of the quenching oil and longer quenching time.At the same time,the banded structure in the raw material increase the tendency of quenching crack.Finally,the countermeasures to quenching crack are put forward. |
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| Keywords: | 40CrMnMo steel quenching crack banded structure |
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