热轧冷却方式和冷轧压下率对含钛IF钢冷轧板组织和力学性能的影响

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英文篇名：Effects of Cooling Methods after Hot-Rolling and Cold Rolling Reduction Ratio on Microstructure and Mechanical Properties of Cold Rolled Ti-IF Steel Sheet 作者：王敏莉 ; 秦炜 ; 杜江波 ; 蓝慧芳 英文作者：WANG Min-li;QIN Wei;DU Jiang-bo;LAN Hui-fang;PanGang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization;Sinosteel Scie-tech Development Co.,Ltd.;Ansteel Engineering Technology Corporation Limited Co.,Ltd.;The State Key Laboratory of Rolling and Automation,Northeastern University; 关键词：冷轧压下率 ; 超快速冷却 ; 退火 ; 组织 ; 性能 英文关键词：cold rolling reduction ratio;;ultra-fast cooling;;annealing;;microstructure;;mechanical property 中文刊名：GXGC 英文刊名：Materials for Mechanical Engineering 机构：攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室;中钢科技发展有限公司;鞍钢集团工程技术有限公司;东北大学轧制技术及连轧自动化国家重点实验室; 出版日期：2014-09-20 出版单位：机械工程材料 年：2014 期：v.38;No.310 语种：中文; 页：GXGC201409005 页数：7 CN：09 ISSN：31-1336/TB 分类号：26-31+116

摘要

以工业生产的、采用层流冷却和超快速冷却的含钛IF热轧板为试验材料,在实验室研究了热轧冷却方式和冷轧压下率对退火后试验钢组织和力学性能影响。结果表明:当冷轧压下率为65%和75%时,与层流冷却相比,超快速冷却试验钢的Rp0.2约低10MPa左右,n值高0.02,r值稍高;当冷轧压率在55%~85%时,试验钢的Rp0.2为100~120MPa;最佳工艺为热轧后采用超快速冷却,PY400温度约为780℃、冷轧压下率为65%~75%、退火温度为730℃;在此最佳工艺下,试验钢具有较低的屈服强度和优良的冲压成型性能。
        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 nvalue was high 0.02 and the r value slightly higher.When the cold reduction ratio was55%-85%,the Rp0.2was 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.

引文

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