摘要
借助于扫描电镜、光学显微镜对汽车上摆臂HP295热轧板材断裂原因进行失效分析,通过对汽车摆臂化学成分的测定、宏观断口及显微组织的观察,确定工件内部存在严重的质量问题。分析认为奥氏体化温度过高产生的魏氏组织、MnS夹杂物沿轧制方向分布得较多、较长,是导致构件在服役时沿轧制方向断裂的主要原因。
By means of microscope and scanning electron microscope,failure analysis of automobile swing fracture was studied.According to test chemical composition,macrofractography and observation of microstructure to a failure workpiece,the results show that there are much Widmanstatten structure and more MnS inclusions in the failure workpiece,and lead to failure of swing in the rolling direction.
出处
《金属热处理》
CAS
CSCD
北大核心
2007年第z1期283-285,共3页
Heat Treatment of Metals
基金
河北农业大学非生命学科基金(F05010)
关键词
宏观断口
魏氏组织
MnS夹杂
macrofractography
widmanstatten structure
MnS inclusions
