In order to reduce the bending cracking rate of hot rolled high strength structural steel,the composition and properties of the cracked samples were tested,and the cracking sites were analyzed by metallographic scanning and electron microscopy.The results showed that the large size of sulfide inclusions and large amount of calcium aluminate inclusions in the steel plate were the main reasons for the bending cracking.Based on the results,an optimization scheme of steelmaking process was put forward,and a good effect was achieved.
关键词
高强结构钢/折弯开裂/硫化物/夹杂
Key words
high strength structural steel/bending cracking/sulfide/inclusion
维普
万方数据