祁聪,王新东,丁文红,吴挺,孙力,刘天武,潘进,张志强

• 1:武汉科技大学耐火材料与冶金国家重点试验室
• 2:河钢集团有限公司
• 3:河钢集团研究总院
• 4:河钢集团邯钢公司技术中心

摘要(Abstract)：

采用裂纹柔度法(CCM)、X射线衍射分析、扫描电镜(SEM)、透射电镜(TEM)、显微维氏硬度计等研究了700L高强钢不同温度回火和温变形后内部组织和残余应力的变化。结果表明:相较于回火,温变形能促进700L高强钢中碳化物的析出;随温变形温度的升高,700L高强钢的整体残余应力持续下降,在100～300℃温变形时,残余应力快速下降,300℃温变形后残余应力下降至34.77%,在300～600℃温变形时,残余应力下降平缓,600℃温变形后,残余应力降低到20.83%,温变形对残余应力的调控作用显著。高温区间温变形还可以降低700L高强钢表面的拉应力水平,提高其疲劳性能。

关键词(KeyWords)： 700L高强钢;温变形;位错密度;残余应力

Abstract:

Keywords:

基金项目(Foundation): 湖北省技术创新专项重大项目(2018AA005)

作者(Author): 祁聪,王新东,丁文红,吴挺,孙力,刘天武,潘进,张志强

DOI: 10.13289/j.issn.1009-6264.2020-0366

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