Abstract��The analysis was made on the wrinkle defects of a SWRM8 blot head cap ,The result showed that it was related to abnormal coarse grain area existing on surface layer of the SWRM8 wire rod .Formation of abnormal coarse grain area is directly related to relativly low finishing rolling temperature of hot rolling and too high temperature and too slowly cooling after spinning.so it was necessary strictly controlling rolling processes prevent abnormal grain growth .
2009, Vol. 27 
