摘要
针对310S不锈钢中厚板表面出现裂纹缺陷的问题,对其连铸坯进行了低倍组织检测及表面渗透检测,再对产生裂纹缺陷的热轧钢板进行了扫描电镜分析及金相检验。结果表明:热轧钢板明显分成再结晶和未再结晶区域,裂纹均位于再结晶区域;由于再结晶和未再结晶区域组织的变形抗力不同,在钢板轧制过程中,变形抗力弱的区域开始出现裂纹,并扩展到钢板表面,这是产生表面裂纹缺陷的主要原因。
In view of the problem of crack defects on the surface of 310Sstainless steel medium thickness plate,the macrostructure test and surface penetration test were carried out on the continuous casting slab,and then the scanning electron microscope analysis and metallographic examination were carried out on the hot rolled steel plate with crack defects.The results show that the hot rolled steel plate was obviously divided into recrystallization and non-recrystallization regions,and the cracks were all located in the recrystallization region.Due to the difference of deformation resistance between recrystallization and non-recrystallization regions,during the rolling process of steel plate,cracks began to appear with weak deformation resistance area and extend to the surface of steel plate,which was the main reason for surface crack defects.
作者
庄迎
ZHUANG Ying(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron&Steel(Group)Co.,Ltd.,Taiyuan 030003,China;Technology Center,Shanxi Taigang Stainless Steel Co.,Ltd.,Taiyuan 030003,China)
出处
《理化检验(物理分册)》
CAS
2022年第4期41-42,48,共3页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
310S不锈钢
中厚板
表面裂纹
结晶区域
310Sstainless steel
medium thickness plate
surface crack
crystal region