模拟CSP工艺制备冷轧热处理TRIP钢的组织及力学性能

发布时间：2018-03-02 04:20

本文关键词： 薄板坯连铸连轧热处理 TRIP钢微观组织力学性能　出处：《金属热处理》2017年01期 　论文类型：期刊论文

【摘要】：基于薄板坯连铸连轧工艺(CSP)和传统热连轧工艺特点,在实验室利用显微观察与拉伸试验,研究了两种热轧工艺对热轧基板与冷轧热处理后TRIP钢的微观组织及力学性能影响规律。并采用TEM对基于CSP工艺制备的冷轧热处理TRIP钢的微观组织特点进行分析。结果表明:CSP工艺制备的热轧板较传统热连轧工艺有利于获得更高的强度;CSP工艺制备冷轧热处理TRIP钢的抗拉强度与断后伸长率均优于传统热连轧工艺所制备的冷轧热处理TRIP钢,前者性能能达到780 MPa级TRIP钢的要求;通过TEM观察,基于CSP工艺制备冷轧热处理TRIP钢的残留奥氏体主要分布于铁素体晶界,少量分布于铁素体晶内和贝氏体板条间的薄膜处。
[Abstract]:Based on the characteristics of thin slab continuous casting and continuous rolling process (CSP) and traditional hot strip rolling process, microscopical observation and tensile test were used in the laboratory. The effects of two hot rolling processes on the microstructure and mechanical properties of hot rolled substrates and cold-rolled and heat-treated TRIP steels were studied, and the microstructure characteristics of cold-rolled and heat-treated TRIP steels prepared by CSP process were analyzed by TEM. The results show that the hot-rolled plate prepared by the ratio CSP process is better than the traditional hot rolling process in obtaining higher tensile strength and post-break elongation of the cold-rolled heat-treated TRIP steel, which is superior to the cold-rolled heat-treated TRIP steel prepared by the traditional hot-rolling continuous rolling process, and the results show that the tensile strength and the elongation after breaking of the cold-rolled heat-treated TRIP steel are better than those of the traditional hot-rolling continuous rolling process. The former can meet the requirements of 780 MPa grade TRIP steel, and the residual austenite of cold-rolled heat-treated TRIP steel prepared by CSP process is mainly distributed at the grain boundary of ferrite, and a small amount of austenite is distributed in the film between ferrite crystal and bainite lath.
【作者单位】：内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室;安徽工业大学冶金减排与资源综合利用教育部重点实验室;内蒙古科技大学材料与冶金学院;
【基金】：国家自然科学基金(51304120,51364033) 内蒙古自然科学基金(2015MS0556,2015MS0557)
【分类号】：TG142.1;TG335

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