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本文研究了不同钛含量对钒、钛微合金化汽车大梁用钢力学性能的影响。结果表明，０．０２％～０．１５％Ｔｉ对强度的影响分三个阶段：①＜０．０４％Ｔｉ，强度变化较小；②０．０４％～０．０８％Ｔｉ，强度随钛含量增加而显著升高；③０，０８％～０．１５％Ｔｉ，强度增加趋于平缓。其强度变化主要是细小弥散分布的ＴｉＣ强化所致。根据试验结果，开发了一种性能稳定的汽车大梁用钢新产品。
In this paper, the effects of different titanium contents on the mechanical properties of vanadium and titanium microalloyed automotive beams were studied. The results show that the influence of 0.02% ~ 0.15% Ti on the strength is divided into three stages: ① <0.04% Ti, little change in strength; ② 0.04% ~ 0.08% Ti, Increase and significantly increased; ③0,08% ~ 0.15% Ti, the intensity increase tends to be gentle. The intensity change is mainly due to the finely dispersed TiC strengthening. According to the test results, the development of a new product with stable performance for automobile girder steel.