朱帅帅,王章忠,张保森,赵甜,毛向阳,董强胜

• 1:南京工程学院材料工程学院
• 2:江苏省先进结构材料与应用技术重点实验室

摘要(Abstract)：

利用热变形与温变形相结合的复合形变热处理工艺对38MnVS非调质钢进行了处理,借助光学显微镜、扫描电镜、能谱仪、拉伸试验机、摆锤冲击试验机及显微硬度仪等对其组织结构及力学性能进行了表征。结果表明,当复合形变热处理工艺为1150~1200℃热变形(25%变形量)+650℃温变形(15%变形量)时,能够显著改善其组织结构,并有效增加珠光体团位错密度及形变强化效应,其显微组织主要为珠光体和沿晶界或晶内分布的均匀细小铁素体,抗拉强度、屈服强度和冲击吸收功(25℃)分别为935.8 MPa、625.5 MPa和11.8 J,相对于传统的控锻控冷工艺分别提升9.4%,12.5%和61.6%,且试样冲击断口具有解理断裂和微孔聚集型断裂混合特征。

关键词(KeyWords)： 非调质钢;形变热处理;冲击韧性;断裂机理

Abstract:

Keywords:

基金项目(Foundation): 江苏省高校自然科学研究重大项目(15KJA430004);; 江苏省先进结构材料与应用技术重点实验室开放基金(ASMA201406);; 江苏省2015年度普通高校研究生实践创新计划项目(SJLX15_0729);; 2015年江苏省高等学校大学生创新创业训练计划项目(201511276015Z;N20151708)

作者(Author): 朱帅帅,王章忠,张保森,赵甜,毛向阳,董强胜

DOI: 10.13289/j.issn.1009-6264.2016.05.025

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