采用Gleeble-3500热力模拟试验机研究了不同变形量下超洁净低活化马氏体钢(SCRAM钢)的组织结构和拉伸性能的变化.利用光学显微镜、透射电镜及扫描电镜对其微观组织进行了观察,用Instron-5848微型材料试验机对其拉伸性能进行了测试.结果表明:温变形可以有效的细化马氏体板条束和增加位错密度.随着变形量的增加,位错组态逐渐由位错线、位错堆积等低密度位错组态转变为重的位错缠结、位错胞等高密度位错组态.当变形量达到ε=0.5时,试样具有高的抗拉强度和屈服强度,但是伸长率和断面收缩率较低.拉伸断口表明随着变形量的增加,韧窝逐渐变得浅而细小.
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