The present study demonstrates the role of hot rolling and quench temperature in determining the mechanical properties of low alloy steel processed through quenching and nonisothermal partitioning (Q&P) route. The results indicate that the abrasive wear resistance does not show any significant variation with quench temperature. However, a reduction in tensile strength and an increase in charpy impact toughness and elongation is observed with increasing quench temperature. Interestingly, the retained austenite shows high thermal stability at sub-zero temperature. Furthermore, during deformation through the wear process, the retained austenite experiences the TRIP effect that leads to improvement in wear resistance. The incorporation of hot rolling prior to Q&P led to a significant improvement in strength, energy absorption capability and wear resistance due to a considerable refinement of the microstructural constituents.

本研究证明了热轧和淬火温度在确定通过淬火和非等温分配（Q＆P）途径加工的低合金钢的力学性能中的作用。结果表明，耐磨性没有显示出随淬火温度的任何显着变化。然而，随着淬火温度的升高，观察到拉伸强度的降低以及夏比冲击韧性和伸长率的提高。有趣的是，残余奥氏体在低于零的温度下显示出高的热稳定性。此外，在通过磨损过程的变形过程中，残留的奥氏体会经历TRIP效应，从而提高了耐磨性。在进行Q＆P之前加入热轧使强度显着提高，