酸洗汽车钢QStE500TM的开发与应用

Development and Applications of Pickled Automobile Steel QStE500TM

文章主要介绍了500 MPa级低合金高强汽车钢的开发过程,通过采用Nb、Ti复合微合金化处理技术,结合控轧控冷工艺,生产出的酸洗汽车结构用钢QStE500TM产品的力学性能、冷弯性能均满足标准要求,金相组织以准多边形铁素体和珠光体组织为主,晶粒尺寸均匀、细小,表面质量良好,已实现批量稳定生产,作为包钢酸洗汽车钢的代表产品,受到用户的认可和肯定。

In the paper,the process of developing 500 MPa grade low alloy high strength automobile steel is mainly introduced.With the multi-microalloying treatment technology of Nb and Ti combining with controlled rolling and cooling process,the mechanical properties and cold bending property of manufactured pickled automobile structure steel QStE500TM could meet the standard requirements.Its metallographic structure is mainly quasi-polygonal ferrite and pearlite,grain size is uniform and fine,surface quality is good as well as the stable batch production has been realized.As the representative product of pickled automobile steel for Baotou Steel,it is recognized by users.