Chen Xingfu, Yang Tongli, Xiao Jiming, Zhu Ning, He Xiaofeng, Zhou Qiulan. Investigation into Causes of Cracking of HP295 and Countermeasures[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(5): 70-74.
Citation:
Chen Xingfu, Yang Tongli, Xiao Jiming, Zhu Ning, He Xiaofeng, Zhou Qiulan. Investigation into Causes of Cracking of HP295 and Countermeasures[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(5): 70-74.
Chen Xingfu, Yang Tongli, Xiao Jiming, Zhu Ning, He Xiaofeng, Zhou Qiulan. Investigation into Causes of Cracking of HP295 and Countermeasures[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(5): 70-74.
Citation:
Chen Xingfu, Yang Tongli, Xiao Jiming, Zhu Ning, He Xiaofeng, Zhou Qiulan. Investigation into Causes of Cracking of HP295 and Countermeasures[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(5): 70-74.
Cracks have been found during deep processing of the HP295 supplied by a hot rolling plant of an iron ＆ steel company.In order to solve this problem,based on analysis of mechanical properties and microstructure of HP295,chemical compositions and rolling processes are optimized by lowering the content of C,Mn and P,reducing the anisotropy of the strip,and applying final rolling temperature of 850～890 ℃,two-stage cooling,coiling temperature of 630～670 ℃,which may be adjusted a little with seasons.Thus,higher proportion of finer and more uniform ferrite and more dispersive pearlite with lower yield ratio are obtained.As a result,the average cracking rate of HP295 is decreased from about 1% to 0.3%.
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