16Mn 钢内裂纹愈合区域的微观分析  

Micro-analysis of the healing area of inner cracks in a 16Mn steel

作　　者：张永军[1] 韩静涛[1] 任秀平[2] 赵中里[1] 

机构地区：[1]北京科技大学材料科学与工程学院 [2]冶金工业信息标准研究院,北京100730

出　　处：《北京科技大学学报》2006年第2期129-132,162,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金(No.59889101);高等学校博士学科点专项科研基金(No.20030008001);北京市优秀人才培养专项经费资助项目(No.20041D0101109)

摘　　要：对经过热愈合处理的16Mn 钻孔压缩试样的内裂纹愈合形态、愈合区域组织结构、显微硬度进行了测试与分析．扫描电镜分析结果显示,愈合区内精细组织主要为铁素体,并存在许多大小为几百纳米级的多边晶块．维氏硬度测试结果显示,出现在愈合区铁素体组织的维氏硬度高于基体区铁素体组织,其可能原因是愈合区中出现的多边晶块结构所引发的强化．Healing processing of 16Mn steel samples was carried out. The healing area of internal cracks made by compressing a drilled hole was observed and analyzed. SEM analysis displayed that the fine structure in the healing area is mostly ferrite and there exists many polyangular grains of several hundreds nanometer. Vickers hardness tests showed that the hardness of ferrite in the healing area is higher than that in the matrix, which may result from strengthening of polyangular grains.

关 键 词：金属 内裂纹 愈合 精细组织 

分 类 号：TG111.9[金属学及工艺—物理冶金]