锻压技术

首钢汽车结构用热轧酸洗带钢SAPH440的开发

英文标题：Development of hot-rolled and pickled strip steel SAPH440 for automobile structure of Beijing Shougang Co.,Ltd.

作者：郭子峰冯军白永立孟宪堂李玉鹏王伦

分类号：TG335.35

出版年,卷(期):页码：2015,40(2):60-64

摘要：

随着工业生产的发展，热轧酸洗带钢已经广泛用于汽车、空调等行业。在汽车应用方面，热轧酸洗带钢主要用于制造横梁、支架等结构件。介绍了首钢汽车结构用热轧酸洗带钢SAPH440炼钢、热轧等生产工艺，检验并分析了其基体组织、力学性能和表面质量等。结果说明，金相组织为铁素体+少量的珠光体，铁素体晶粒度为11级，仅发现夹杂物1.0级D类和0.5级DS类，力学性能满足相关标准要求。针对热轧酸洗板在酸洗过程中易于发生划伤、停车斑和辊印等缺陷，提出了具体改进措施。

With the development of industry, the hot-rolled and pickled strip steel is widely used in the automobile and air condition industries. In the case of automobile, the hot-rolled and pickled strip steel is applied in structure parts, such as beam and bearing bracket. The steelmaking and hot-rolled processes of the hot-rolled and pickled strip steel SAPH440 of Beijing Shougang Co.,Ltd. were introduced, and the microstructure, mechanical property and surface quality of products were tested and analyzed in details. It is shown that the microstructure consists of pearlite and ferrite with grain size 11, and the inclusions of type D and DS, so the relative standards of various mechanical properties can be fully met. The specific improvement measures are adopted to prevent from the defects such as scratching, parking spot and roll printing produced in the hot-rolled and pickling process.

基金项目：

首钢科技项目“热轧酸洗板的研究与开发”

郭子峰（1984-），男，博士，工程师

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