Abstract��The unqualified screw made of SWRCH22A for drilling test was analyzed and studied. The results showed that it was caused by the heat��treatment process and was solved at last.
������;����Ӣ. �ݶ����ٲ����������[J]. �й������ڿ���, 2008, 26(5): 37-0.
LI Zhi��li;HAN Feng��ying. nalysis of Unqualified Screw for Drilling Test. Chinese Journal of Iron and Steel, 2008, 26(5): 37-0.
2008, Vol. 26 
