Fracture failure analysis of 60Si2MnA spring steel
YE Sheng-yuan1��XU Dao-song1��XU Xuan-xuan2��LIU Guo-bin3��WU Chuan-jia1��ZHAO Jun1
��1. Hangzhou Steel Metal Materials Ecommerce Ltd.��Hangzhou 310022��China 2. Zenith Steel Group Co.��Ltd.��Changzhou 213011��China 3. Shandong Special Industry Group Co.�� Ltd.��Zibo 255201��China��
Abstract��A company used 60Si2MnA steel to manufacture the spiral compression spring for vehicles�� and the spring fracture occurred during the assembly process. The causes of spring fracture were analyzed by macroscopic test�� chemical composition analysis�� metallographic examination and scanning electron microscope analysis. The results showed that the whole section of spring was the intergranular fracture�� which was mainly caused by the surface crack defect of raw material (round steel).The overheating phenomenon of spring original structure led to the weakening of grain boundary to some extent�� which could promote its fracture.
2018, Vol. 36 
