本文提出了关于提高低碳钢硬化强度指标的新方法、是将试样扭转至剪切屈服极限后,按一定梯度增加单位残余塑性扭转角θ_p,卸载后将得到的硬化试样再进行常规拉伸试验,获得扭转拉伸硬化屈服极限σ_(τs)和强度极限σ_(τb),它们超过了常规拉伸硬化的强度指标. In this paper, a new method to improve the hardenability of low carbon steel is proposed. After the sample is twisted to the yield limit of shear, the unit residual plastic twist angle θ_p is increased by a certain gradient. After unloading, the hardened sample Tensile tests were performed to obtain the yield stress σ τ (τs) and the strength limit σ τ (τ b) of the torsional tensile set, which exceeded the strength indices of conventional tensile tests.