High-strength boron steels are widely used in manufacturing the auto bodies and parts of light-weight vehicles, but the high rates of surface scratches and die wear have consistently occurred during hot stamping for these steels. For an in-depth understanding of the tribological characteristics at this interface, the frictional contact behavior and thermomechanical mechanisms of boron steel 22MnB5 against die steel H13 at 800 °C were studied through experiments and finite-element simulations. The coefficient of friction and worn surface topography were investigated by pin-on-disk sliding tests. A three-dimensional thermomechanical finite-element model of a friction pair was established to explore the interfacial dynamic variations. Experimental and simulation results show that severe elastic–plastic deformation occurred on the worn surface of the boron steel, whereas an increase in the load decreased the coefficient of friction within a certain range because the growth rate of shear force was slower than that of the normal force. When the finite-element model was changed from the gradual loading stage to the initial sliding stage, the tangential friction force further increased the plastic deformation on the surface of boron steel. The scratches and furrows were mainly caused by the compression and shear from asperities of the rough surface, as confirmed by the high-frictional-stress regions concentrated on the peaks and flanks of asperities. During the high-temperature and high-pressure experiments, the plasticized and softened surface materials of the boron steel adhered to the die surface readily, resulting in peeling and delamination.

高强度硼钢被广泛用于制造轻型汽车的车身和零件，但是在这些钢的热​​冲压过程中，始终存在很高的表面刮擦和模具磨损率。为了深入了解此界面的摩擦学特性，通过实验和有限元模拟研究了22MnB5硼钢与H13模具钢在800°C时的摩擦接触行为和热机械机理。通过销盘滑动试验研究了摩擦系数和磨损的表面形貌。建立了摩擦副的三维热力学有限元模型，以研究界面动力学变化。实验和模拟结果表明，硼钢的磨损表面发生了严重的弹塑性变形，而载荷的增加则在一定范围内降低了摩擦系数，因为剪切力的增长速度比正常情况下要慢。力。当有限元模型从逐渐加载阶段变为初始滑动阶段时，切向摩擦力进一步增加了硼钢表面的塑性变形。划痕和沟槽主要是由于粗糙表面的凹凸不平所引起的压缩和剪切所致，这一点已由集中在凹凸不平的峰和侧面上的高摩擦应力区域证实。在高温高压实验中