本文研究了汽车转向节热锻模型腔表层因热影响所引起的显微组织变化与磨损形式.通过金相观察、扫描电镜分析及显微硬度测定,结果表明模具在高温、巨烈摩擦力及冷热应力的循环作用下,型腔表层出现了两种与原始显微组织不同的白亮层,且在不同的白亮层区域内出现了不同形式的磨损. In this paper, the microstructural changes and wear patterns of the hot-forged die cavities caused by heat are analyzed in this paper.The results of metallographic observation, scanning electron microscopy and microhardness test show that the die at high temperature, Under the action of the thermal and thermal stresses, two white bright layers appear on the surface of the cavity different from the original microstructure, and different forms of wear appear in the different white bright layers.