| 热处理工艺对30MnCrNiMo高强钢组织与性能的影响 |
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| 引用本文： | 耿文远,高平,王凡,张鸣一,田迎春.热处理工艺对30MnCrNiMo高强钢组织与性能的影响[J].金属热处理,2020,45(1):42-47. |
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| 作者姓名： | 耿文远 高平 王凡 张鸣一 田迎春 |
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| 作者单位： | 内蒙金属材料研究所, 内蒙古 包头 014034 |
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| 基金项目： | 内蒙古自治区科技重大专项 |
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| 摘 要： | 借助全自动淬火膨胀仪测定钢的Ac1、Ac3相变点,通过对试验钢进行淬火+亚温淬火+回火热处理和淬火+回火热处理,研究了两种热处理工艺下30MnCrNiMo高强钢的组织与性能。结果表明:30MnCrNiMo高强钢的Ac1、Ac3相变点分别为653、807 ℃。采用淬火+亚温淬火+回火的热处理工艺所获得的马氏体和铁素体复相组织比直接淬火+回火得到的全马氏体组织更为细小、均匀,试验钢的屈服强度为1499 MPa,伸长率为14.0%,室温、-40 ℃冲击吸收能量分别为35.5和29.5 J,钢的塑性和冲击性能显著提升,有效改善了30MnCrNiMo高强钢的强韧性能。
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| 关 键 词： | 亚温淬火 30MnCrNiMo高强钢 相变点 组织 性能 |
| 收稿时间： | 2019-06-16 |
Effect of heat treatment process on microstructure and properties of 30MnCrNiMo high strength steel |
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| Geng Wenyuan,Gao Ping,Wang Fan,Zhang Mingyi,Tian Yingchun.Effect of heat treatment process on microstructure and properties of 30MnCrNiMo high strength steel[J].Heat Treatment of Metals,2020,45(1):42-47. |
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| Authors: | Geng Wenyuan Gao Ping Wang Fan Zhang Mingyi Tian Yingchun |
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| Affiliation: | Inner Mongolia Institute of Metallic Materials, Baotou Inner Mongolia 014034, China |
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| Abstract: | The phase transition temperature Ac 1 and Ac 3 of 30MnCrNiMo steel was measured through full automatic transformation measuring apparatus,and the quenching and tempering processes and subcritical quenching and tempering processes of the steel were analyzed. The results show that the transformation temperature Ac 1 is 653 ℃ and Ac 3 is 807 ℃.The complex phase microstructure of martensite and ferrite which is obtained from the tested steel after suberitical quenching and tempering processes is more uniform and fine than the whole martensite obtained from the tested steel after direct quenching and tempering processes.The yield strength of the tested steel is 1499 MPa, the elongation is 14.0%, the impact absorbed energy at room temperature and -40 ℃ is 35.5 J and 29.9 J, respectively.The plasticity and impact toughness of the steel are significantly improved, which effectively improves the toughness performance of 30MnCrNiMo high-strength steel. |
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| Keywords: | subcritical quenching process 30MnCrNiMo high-strength steel transformation temperature point microstructure properties |
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