作者单位:BIE Chengcheng,DING Lin,SU Gang(Chongqing Iron&Steel Co. ,Ltd Quality Department,Chongqing,401220)别程程,丁琳,苏刚(重庆钢铁股份有限公司 品质部,重庆401220)WEN Guanghua,BI Jinghan(Chongqing University the faculty of materials science and engineering,Chongqing,400030)文光华,毕经汉(重庆大学材料科学与工程学院,重庆400030)