东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (8): 1125-1128.DOI: -

• 论著 • 上一篇    下一篇

304不锈钢拉伸变形过程中的马氏体相变

申勇峰;李晓旭;薛文颖;刘振宇;   

  1. 东北大学材料与冶金学院;东北大学轧制技术及连轧自动化国家重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家科技支撑计划项目(2011BAE13B03);;

Changes in martensite fraction of 304SS in tensile deformation

Shen, Yong-Feng (1); Li, Xiao-Xu (1); Xue, Wen-Ying (2); Liu, Zhen-Yu (2)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China; (2) The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Shen, Y.-F.
  • About author:-
  • Supported by:
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摘要： 通过单向拉伸实验,研究了304不锈钢在不同应变量及不同应变速率下的马氏体含量与力学性能之间的关系.结果表明:在室温下,当应变速率为3×10-3s-1时,该材料的屈服强度和抗拉强度分别为220及1 260MPa,延伸率为57%,变形后样品中的马氏体体积分数为55%;当应变速率增加到3×10-1s-1时,虽然该材料的屈服强度增至370MPa,但是抗拉强度下降至1 000MPa,延伸率则下降至42%,变形后样品中的马氏体体积分数下降至21%.上述结果说明,该304不锈钢的塑性变形能力与其中的马氏体体积分数密切相关,应变诱导马氏体相变是该钢种的主要变形机制.

关键词: 304不锈钢, 力学性能, 显微组织, 变形机理, 马氏体相变

Abstract: The relationship between the martensite content and the mechanical property of 304 stainless steel was investigated through uniaxial tensile tests by changing strain rate. When the strain rate increased from 3×10-3 s-1 to 3×10-1 s-1 at the room temperature, the yield strength increased from 220 to 370 MPa, while the tensile strength and ductility decreased from 1260 to 1000 MPa and from 57% to 42%, respectively. While the volume fraction of sample martensite dropped from 55% to 21%. The results indicate that the steel's plasticity is closely related to the martensite content, suggesting that the dominant deformation mechanism of the 304 stainless steel can be attributed to strain-induced martensitic transformation.

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