摘要
利用光学显微镜、扫描电镜和电子探针对热处理后开裂的42CrMo钢制大型风电主轴进行微观组织形貌及微区成分分析。结果表明,主轴裂纹附近存在大量的硫化物及氮化物夹杂,且夹杂物与基体存在明显的间隙面,易以界面脱粘开裂机制产生裂纹,同时夹杂处的微区成分偏析及裂纹附近的缩松缺陷共同作用最终导致主轴开裂。
Microstructure and composition of the cracked 42CrMo steel wind turbine spindle were analyzed by means of optical microscope,SEM and EPMA.The results show that there are a large number of sulfide and nitride inclusions near the cracks of the main shaft,and there is an obvious gap between the inclusions and the matrix,which is easy to produce cracks by the mechanism of interface debonding and cracking.At the same time,the micro area component segregation at the inclusion and the shrinkage defects near the cracks work together to eventually lead to the cracks of the main shaft.
作者
苑静之
时乐智
许文花
陈鹭滨
吕宇鹏
Yuan Jingzhi;Shi Yuezhi;Xu Wenhua;Chen Lubin;LüYupeng(School of Materials Science and Engineering,Shandong University,Jinan Shandong 250061,China;Jinlei Technology Co.,Ltd.,Jinan Shandong 271105,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第7期206-209,共4页
Heat Treatment of Metals
关键词
风电主轴
淬火开裂
缺陷
开裂机理
wind power spindle
quenching cracking
defect
cracking mechanism
