| 两相区淬火对5NiCrMo钢组织与性能的影响 |
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| 引用本文： | 沈俊昶,杨才福,张永权.两相区淬火对5NiCrMo钢组织与性能的影响[J].钢铁,2007,42(6):63-68,87. |
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| 作者姓名： | 沈俊昶 杨才福 张永权 |
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| 作者单位： | 钢铁研究总院结构材料研究所,北京,100081 |
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| 摘 要： | 研究了淬火 两相区淬火 回火工艺(QQ'T)对5NiCrMo钢力学性能的影响,采用光学显微镜和透射电镜详细观察了微观组织结构,分析了组织演变规律及其对性能的影响.研究结果表明,5NiCrMo钢经QQ'T处理后屈强比降低,低温韧性提高,并改善了回火稳定性.板条状的回火二次马氏体 铁素体的混合组织及回火过程中沿板条边界析出的逆转变奥氏体是试验钢获得良好性能的原因.
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| 关 键 词： | 热处理 强度 韧性 屈强比 逆转变奥氏体 5NiCrMo |
| 文章编号： | 0449-749X（2007）06-0063-06 |
| 修稿时间： | 2006-09-06 |
Effect of Intercritical Treatment on Structure and Properties of 5NiCrMo Steel |
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| SHEN Jun-chang,YANG Cai-fu,ZHANG Yong-quan.Effect of Intercritical Treatment on Structure and Properties of 5NiCrMo Steel[J].Iron & Steel,2007,42(6):63-68,87. |
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| Authors: | SHEN Jun-chang YANG Cai-fu ZHANG Yong-quan |
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| Affiliation: | Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China |
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| Abstract: | The mechanical properties of an experimental 5NiCrMo steel subjected to a special heat treatment consisting of sequential quenching(Q),intercritical quenching(Q') and tempering(T) were measured,and the microstructure evolution during QQ'T treatment was systematically studied using optical microscope(OM) and transmi-ssion electron microscope(TEM).An optimum QQ'T treatment regime for strength and low temperature impact toughness of the steel was subsequently determined.It was demonstrated that a microstructure consisting of mainly fine lath-like martensite with high tempering stability and ferrite impeached by a small amount of precipitated auste-nite can be obtained in QQ'T-treatment,which results in improvement in low temperature impact toughness and yield ratio. |
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| Keywords: | heat treatment stre ngth toughness yield ratio precipitated austenite 5 NiCrMo |
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