东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (4): 499-503.DOI: 10.12068/j.issn.1005-3026.2014.04.010

• 材料与冶金 • 上一篇    下一篇

低碳马氏体钢的细晶强化机理及其力学性能

刘沿东，刘顺臻，宋华丁，孔祥伟   

  1. (东北大学 材料各向异性与织构教育部重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2013-04-14 修回日期:2013-04-14 出版日期:2014-04-15 发布日期:2013-11-22
  • 通讯作者: 刘沿东
  • 作者简介:刘沿东(1966-)，男，辽宁沈阳人，东北大学教授.
  • 基金资助:
    国家科技支撑计划重点项目(2011BAE13B03)；中央高校基本科研业务费专项资金资助项目(N110502001).

FineGrain Strengthening Mechanism of LowCarbon Martensite Steel and Its Mechanical Properties

LIU Yandong， LIU Shunzhen， SONG Huading， KONG Xiangwei   

  1. Key Laboratory for Anisotropy and Texture of Materials
  • Received:2013-04-14 Revised:2013-04-14 Online:2014-04-15 Published:2013-11-22
  • Contact: LIU Yandong
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摘要： 对不同热处理条件下获得的低碳马氏体钢的微观组织及力学性能进行了系统的研究.实验结果表明，盐浴淬火热处理可以实现样品的快速、均匀加热，与常规的热处理条件相比，由于加热速度快、保温时间短，在材料完全奥氏体化初期或接近完全奥氏体化情况下，奥氏体晶粒还未长大，通过淬火得到较为细小的马氏体组织，可以获得力学性能优良的马氏体钢.通过优化的热处理参数可以将材料的抗拉强度和延伸率均提高10%以上.其中盐浴淬火在930℃×20s工艺下，抗拉强度达到1488GPa，延伸率为76%.

关键词: 低碳马氏体钢, 淬火热处理工艺, 奥氏体, 显微组织, 力学性能

Abstract: Microstructure and mechanical properties of lowcarbon martensite steel obtained by different heat treatment conditions were studied. The results showed that the salt bath quenching heat treatment can achieve rapid and uniform heating. Compared to conventional heat treatment conditions， the austenite grain size has not grown up at the early stages of fully austenitic or nearly fully austenitic due to the fast heating speed and short heat preservation time， so the fine martensite microstructure was obtained by quenching and the martensite steel has excellent mechanical properties simultaneously. Through the heat treatment parameters optimization， the tensile strength and elongation increase more than 10%. Under the 930℃×20s salt bath quenching， the martensite steel’s tensile strength is 1488GPa and the elongation is 76%.

Key words: lowcarbon martensite steel, quenching heat treatment process, austenite, microstructure, mechanical properties

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