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WANG Min-li, QIN Wei, DU Jiang-bo, LAN Hui-fang. Effects of Cooling Methods after Hot-Rolling and Cold Rolling Reduction Ratio on Microstructure and Mechanical Properties of Cold Rolled Ti-IF Steel Sheet[J]. Materials and Mechanical Engineering, 2014, 38(9): 18-23.
Citation: WANG Min-li, QIN Wei, DU Jiang-bo, LAN Hui-fang. Effects of Cooling Methods after Hot-Rolling and Cold Rolling Reduction Ratio on Microstructure and Mechanical Properties of Cold Rolled Ti-IF Steel Sheet[J]. Materials and Mechanical Engineering, 2014, 38(9): 18-23.
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Effects of Cooling Methods after Hot-Rolling and Cold Rolling Reduction Ratio on Microstructure and Mechanical Properties of Cold Rolled Ti-IF Steel Sheet

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  • Received Date: July 21, 2014
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    • Abstract
  • Taking industrial Ti-IF steel sheets prepared under laminar cooling and ultra-fast cooling conditions as tested materials, and the effects of cooling methods after hot-rolling and cold rolling reduction ratio on microstructure and mechanical properties were studied. The results show that when the cold rolling reduction ratio was 65% and 75%, comparing with the laminar cooling, the Rp0.2of the steel under ultra-fast cooling was overall low around 10 MPa, the n value was high 0.02 and the r value slightly higher. When the cold reduction ratio was 55%-85%, the Rp0.2 was 100-120 MPa. The optimal processes were ultra-fast cooling after hot rolling, PY400 temperature of 780 ℃, cold reduction ratio of 65%-75% and the annealing temperature of 730 ℃. At the optimum processes, the tested steel had a lower yield strength and good stamping performance.
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    • References (3)
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    朱晶,刘帅,贾维平,等.退火工艺对Ti+Nb-IF钢组织与性能的影响［J］.热加工工艺,2008,37(22):59-63.
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    郑之旺,王敏莉,李叙生.卷取温度和冷轧压下率对高强度IF钢力学性能的影响［J］.钢铁钒钛,2011,32(3):40-45.
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