汽车大梁钢TT610L的开发

Development of Automobile Beam Steel TT610L

介绍了天铁热轧板公司新型含Nb汽车大梁钢TT610L的开发过程,阐述了微合金化的成分设计、控轧控冷工艺对钢的微观组织及力学性能的影响。实验表明,TT610L具备优良的微观组织,稳定的力学性能,良好的低温冲击韧性,优异的冷成型性能,能够满足多种轻型车和载重车车身轻量化及高质量零部件的加工和使用要求。

The paper introduces the developing process of new automobile beam steel TT610L containing Nb at Tiantie Hot Rolling Plate Subsidiary and expounds the influence of microalloying composition design and TMCP process on steel microstructure and mechanical properties. Test results showed TT610L plate could meet the demand of bodywork weight-cutting by various light duty vehicles and trucks and that of machining and utilization by high quality parts with sound microstructure, steady mechanical properties, good low temperature impact toughness and excellent cold formability.