摘要
某汽车大梁用510L钢在冷弯加工过程中出现了开裂,用SEM、EDS和OM对510L钢冷弯开裂的断口、夹杂物、组织形貌以及热处理工艺对带状组织形成的影响等方面进行研究,分析钢冷弯开裂的原因。结果表明,试样心部氧化铁层以及硫化锰偏析是该钢冷弯开裂的主要原因,铁素体/珠光体带状组织进一步促进了裂纹的扩展。
Cracks was found on 510L steel automobile beam during cold bending process, fracture and inclusions morphology, and effect of heat treatment on band microstructure were studied by SEM, EDS and OM to verify the causes of cracking. The results show that iron oxide layer and manganese sulfide in core of the steel plate specimen were the main reasons for the cracks during cold bending, and the ferrite/pearlite band microstructure further promoted the cracks propagation.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第6期190-194,共5页
Heat Treatment of Metals
关键词
汽车大梁510L钢
冷弯开裂
氧化铁层
带状组织
夹杂物
automobile beam 510L steel
cold bending cracks
iron oxide layer
band microstructure
inclusion
