| 临界热处理对中碳 Q&P 钢组织与性能的影响 |
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| 引用本文： | 郑花,胡锋,柯睿,吴开明.临界热处理对中碳 Q&P 钢组织与性能的影响[J].钢铁研究学报,2021,33(1):46-49. |
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| 作者姓名： | 郑花 胡锋 柯睿 吴开明 |
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| 作者单位： | 1.武汉科技大学高性能钢铁材料及其应用省部共建协同创新中心， 国际钢铁研究院， 湖北 武汉 430081；2.湖北科技学院核技术与化学生物学院， 湖北 咸宁 437100；3.材谷金带（佛山）金属复合材料有限公司， 广东 佛山 528200 |
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| 基金项目： | 国家自然科学基金资助项目(U1532268,51671149,51601134);湖北省自然科学基金资助项目(T201903);武汉市科技计划资助项目(2019010701011382);111项目和武汉科技大学科发院重大科技项目(2018TDX07)。 |
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| 摘 要： | 摘要：对中碳钢采用Q&P（淬火 碳分配）和I&QP（临界热处理，淬火 碳分配）热处理工艺，通过对试样的显微组织，残余奥氏体的体积分数及其碳含量，硬度及其拉伸性能进行分析，研究了临界加热对中碳Q&P钢组织和性能的影响。实验结果表明，经临界热处理的Q&P钢组织中，除了马氏体和残余奥氏体，还存在部分铁素体，同时残余奥氏体的体积分数较少，马氏体板条更加细小。在相同的碳分配时间下，I&QP试样的硬度和抗拉强度都比Q&P试样低，但由于I&QP试样中软相铁素体的存在以及残余奥氏体能发挥更好的TRIP效应，使得临界热处理的实验钢的伸长率更高，加工硬化指数增加，强塑积更大。
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| 关 键 词： | 关键词：中碳钢 显微组织 残余奥氏体 TRIP效应 临界热处理 |
Effect of intercritical heat treatment on microstructures and properties of medium carbon Q&P steel |
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| ZHENG Hua,HU Feng,KE Rui,WU Kaiming.Effect of intercritical heat treatment on microstructures and properties of medium carbon Q&P steel[J].Journal of Iron and Steel Research,2021,33(1):46-49. |
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| Authors: | ZHENG Hua HU Feng KE Rui WU Kaiming |
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| Affiliation: | 1.Collaborative Innovation Center for Advanced Steels, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 2.School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning 437100, Hubei, China; 3.Metals Valley and Band (Foshan) Metallic Composite Materials Co., Ltd., Foshan 528200, Guangdong, China |
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| Abstract: | In order to analyze the effect of intercritical heat treatment on microstructures and properties of medium carbon Q&P steel,the microstructure,volume fraction and carbon content of retained austenite,hardness and tensile properties of medium carbon steel with Q&P(quenching-partitioning)and I&QP(intercritical heat treatment quenching-partitioning)treatment were studied.The results show that in addition to martensite and retained austenite,some ferrites are present in the microstructure of I&QP treated steel.At the same time,the volume fraction of retained austenite is less and the martensite lath is relatively finer.With the same partitioning time,the hardness and tensile strength of the I&QP specimens are lower than that of the Q&P specimens.However,with the presence of soft ferrite and more obvious TRIP effect,the elongation,work hardening index and product of strength-elongation of the I&QP specimens are higher than those of the Q&P specimens. |
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| Keywords: | medium carbon steel microstructure retained austenite TRIP effect intercritical heating treatment |
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