Abstract��The sample surface cracking from 40Cr circle steel was analyzed, and it is concluded that the metallurgical structure of cracking place is normal; the cracking is not caused by inclusions and bad tissues; it is the scratch surface that cause the cracking.By means of strengthening roller guide, the surface cracking can be eliminated.
�����. 40CrԲ�ֱ�������ԭ�����[J]. �й������ڿ���, 2011, 29(5): 53-55.
LI Jia-zheng. Analysis of the Surface Crack of 40Cr Circle Steel. Chinese Journal of Iron and Steel, 2011, 29(5): 53-55.