201不锈钢形变诱发马氏体相变特性

发布时间：2018-06-28 19:47

  本文选题：不锈钢 + 单向拉伸试验　； 参考：《锻压技术》2017年01期

【摘要】：201不锈钢塑性变形过程中会发生马氏体相变,相变改变了材料力学性能,使201不锈钢拉深成形后易产生时效开裂现象。为探明201不锈钢因马氏体相变导致的时效开裂原因,通过单向拉伸试验,研究了201不锈钢马氏体相变特性、温度和应变速率对马氏体相变的影响规律。结果表明:马氏体相变量随拉伸变形量的增加而增加;增加变形温度与应变速率,均会抑制马氏体相变;当温度达到100℃时,不再有相变发生;在同一温度下,随应变速率的增大,屈服强度和屈强比均增大,伸长率减小;但因马氏体相变,201不锈钢在50℃以下和100℃以上的抗拉强度表现出相反的变化规律;在不同温度下,201不锈钢在应变速率为0.001 s-1时的塑性变形能力最好。
[Abstract]:Martensite transformation occurs during plastic deformation of stainless steel 201, which changes the mechanical properties of the material and makes the aging cracking of 201 stainless steel easy to occur after drawing. In order to find out the reason of aging cracking of 201 stainless steel caused by martensite transformation, the effect of temperature and strain rate on martensitic transformation of 201 stainless steel was studied by uniaxial tensile test. The results show that the martensite phase change increases with the increase of tensile deformation amount, the martensite transformation is inhibited by increasing the deformation temperature and strain rate, and no transformation occurs at 100 鈩，

本文编号：2079147