Wang Qingchun, Chen Tianming, Chen Liang, Yang Wenzhong. Study on Internal Quality Control of 20CrMnTiH Steel Strands[J]. IRON STEEL VANADIUM TITANIUM, 2014, 35(2): 103-107. doi: 10.7513/j.issn.1004-7638.2014.02.020
Citation:
Wang Qingchun, Chen Tianming, Chen Liang, Yang Wenzhong. Study on Internal Quality Control of 20CrMnTiH Steel Strands[J]. IRON STEEL VANADIUM TITANIUM, 2014, 35(2): 103-107. doi: 10.7513/j.issn.1004-7638.2014.02.020
Wang Qingchun, Chen Tianming, Chen Liang, Yang Wenzhong. Study on Internal Quality Control of 20CrMnTiH Steel Strands[J]. IRON STEEL VANADIUM TITANIUM, 2014, 35(2): 103-107. doi: 10.7513/j.issn.1004-7638.2014.02.020
Citation:
Wang Qingchun, Chen Tianming, Chen Liang, Yang Wenzhong. Study on Internal Quality Control of 20CrMnTiH Steel Strands[J]. IRON STEEL VANADIUM TITANIUM, 2014, 35(2): 103-107. doi: 10.7513/j.issn.1004-7638.2014.02.020
2. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China;
3. Pangang Group Panzhihua Steel & Vanadium Co., Ltd., Panzhihua 617062, Sichuan, China
According to the requirements of 20CrMnTiH steel,effects of key parameters including casting peed,the mould's current intensity for electromagnetic stirring(EMS) and intensity of secondary cooling on internal quality of strands were studied.The results show that controlling the casting speed at 1.2~1.4 m/min is beneficial to the control of 20CrMnTiH strands' internal quality,and with current intensity for EMS of 380 A,the level of center porosity can be controlled within 1.0 and the index of carbon segregation not more than 1.08,and the equiaxed crystal ratio reaches 34.9%.Furthermore,center porosity and segregation can also be improved when weak secondary cooling is adopted.Based on these research findings,20CrMnTiH steel bars produced show good macrostructure and hardenability.
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