Technology and Microstructure-Mechanical Properties of Economical Hot Rolled Dual Phase Steel By CSP Process
HAN Bin1,TAN Wen1,WANG Shui-ze1,ZHANG Chao2,CAI Xiao-hui3
1. Research and Development Center of Wuhan Iron and Steel GroupCorp., Wuhan 430080, Hubei, China 2. Wuhan Iron and Steel Co., Ltd., Wuhan 430080, Hubei, China 3. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China
Abstract:In order to develop new generation economical DP steel and obtain the optimum composition and processing parameters in CSP line, the pilot production of 580MPa hot-rolled dual phase strip at WISCO CSP Plant was introduced. Two series of dual phase steel, such as plain C-Mn-Si and C-Mn-Si-Cr steel, were produced successfully by controlled rolling and controlled cooling with ultra fast cooling capacity. The tensile strength of both series of DP steel achieves 580MPa. Comparison of mechanical properties and microstructure between two steels, the results show that the cost of C-Si-Mn steel is lower than C-Si-Mn-Cr steel, C-Si-Mn steel has lower yield stress, lower yield strength/tensile strength ratio and higher elongation. Although obtained martensite fraction in C-Si-Mn steel was lower, the island martensite distributed among the ferrite grain boundaries was more uniform. The specific measures of controlling ferrite formation and promoting martensite transformation were put forward.
韩斌,谭文,汪水泽,张超,蔡晓辉. CSP流程生产经济型热轧双相钢的工艺与组织性能[J]. 钢铁, 2011, 46(12): 44-48.
HAN Bin1,TAN Wen1,WANG Shui-ze1,ZHANG Chao2,CAI Xiao-hui3. Technology and Microstructure-Mechanical Properties of Economical Hot Rolled Dual Phase Steel By CSP Process. Iron and Steel, 2011, 46(12): 44-48.