吴腾,吴润,熊维亮,刘娅琴,滕胜,杨双峰

• 1:武汉科技大学省部共建耐火材料与冶金国家重点实验室
• 2:涟源钢铁有限公司技术中心

摘要(Abstract)：

基于合金减量化原则,采用以超快冷技术为核心的新一代TMCP技术制备了600 MPa级热轧DP钢,研究了卷取温度对试验钢组织性能的影响。结果表明:随着卷取温度增加,试验钢铁素体晶粒尺寸增加,体积分数减小,屈服强度增加,伸长率增加;组织中马氏体均以长条马氏体为主,并由小岛状向块状转变,其体积分数减少,抗拉强度降低;屈强比增加,n值减小。卷取温度对铁素体和马氏体的体积分数、形貌、分布及析出行为有影响。100℃卷取的试验钢,组织中大量的细长条马氏体和较少的析出物提高了材料的位错密度和抗延迟断裂能力,其抗拉强度最高为625 MPa,伸长率为26.0%,屈强比最低为0.52,n值最高为0.21,具有最优的综合性能。考虑到低的卷取温度对工艺控制能力和卷取设备的要求高,试验钢在该工艺条件下合适的卷取温度可选为150～200℃。

关键词(KeyWords)： 热轧DP钢;卷取温度;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51771139);; 省部共建耐火材料与冶金国家重点实验室青年基金(2018QN07)

作者(Author): 吴腾,吴润,熊维亮,刘娅琴,滕胜,杨双峰

DOI: 10.13289/j.issn.1009-6264.2018-0292

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