形变诱导马氏体相变循环制备304不锈钢超塑性的研究  

Study on Superplasticity of 304 Stainless Steel Prepared by Deformation Induced Martensitic Phase Transformation Cycle

作　　者：谢文玲[1] 周顺勇[2] 郭翠霞[1] 李秀兰[1] XIE Wenling ZHOU Sunyong GUO Cuixia LI Xiulan(College of Mechanical Engineering, Sichuan University of Science ＆Engineering, Zigong 643000, China Key Laboratory of Artificial Intelligence of Sichuan Province, Sichuan University of Science ＆ Engineering,Zigong 643000, China)

机构地区：[1]四川理工学院机械工程学院,四川自贡643000 [2]四川理工学院人工智能四川省重点实验室,四川自贡643000

出　　处：《热加工工艺》2017年第2期191-193,196,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51301115);四川省教育厅项目(14ZA0202;14ZB0218)

摘　　要：提出了形变诱导马氏体相变实现304不锈钢超塑性的构想,研究了利用形变诱导马氏体相变循环实现超塑性的方法。结果表明,304不锈钢通过室温形变可诱导马氏体相变,随后时效时马氏体发生逆相变且伴随产生回复应力,从而间接达到了相变超塑性的实现条件。采用室温拉伸30%后在973~1273 K时效20 min,相变循环2次,该钢可实现相变超塑性,总伸长率随时效温度的增加先增加后下降,1123 K达到最大值177%;在室温拉伸30%后1073K时效30 min时,随相变循环次数增加,总伸长率增加,相变循环7次后达到764%。随相变循环次数增加,晶粒明显细化、均匀化。The concept of 304 stainless steel superplasticity realized by deformation induced martensitic phase transformation was put forward. The method of the superplasticity realized by using the deformation induced martensite phase transformation cycle was studied. The results show that 304 stainless steel through room temperature deformation can induce martensitic phase transformation. During subsequent aging, inverse phase transformation of martensite occurs, and the recovery stress accompanies, which indirectly achieves the conditions of phase transformation superplasticity. Stretching 30% at room temperature and then aging at 973-1273 K for 20 min, after two times phase transformation cycle, phase transformation superplasticity of steel can be achieved. The total elongation increases firstly and then decreases with the increase of aging temperature, and reaches the maximum value of 177% at aging temperature of 1123 K. Stretching 30% at room temperature and then aging at 1073 K for 30 min, the total elongation increases with the increase of phase transformation cycle times, and after cycling 7 times, it reaches 764%. With the increase of the number of phase transformation cycle, the grain size is refined and uniform.

关 键 词：马氏体相变 相变循环 相变超塑性 

分 类 号：TG142.7[一般工业技术—材料科学与工程]