A novel austenite aging steel coating was prepared by laser cladding to improve the elevated-temperature wear performance of AISI H13 steel. The wear tests at 400 °C to 600 °C were performed for the austenite aging steel coating and H13 steel. Their elevated-temperature wear performances were comparatively studied; the wear mechanisms under various loads at 400 °C to 600 °C were clarified. The novel austenite aging steel coating possessed an excellent elevated-temperature wear resistance. Comparatively, H13 steel presented an inferior wear resistance at 400 °C to 600 °C due to thermal softening, especially under a high load of 150 N at 600 °C. During elevated-temperature wear, a synergy of tribo-oxide layers and the subsurface matrix determined the wear behavior and mechanisms. Compared with H13 steel, higher resistance to thermal softening ensured a stable existence of the tribo-oxide layers owing to the precipitation strengthening of intermetallic compounds, thus endowing the austenite aging steel with the excellent elevated-temperature wear resistance. Consequently, for the novel austenite aging steel coating, oxidative mild wear prevailed at 400 °C to 600°C without the occurrence of the extrusive wear.

中文翻译：

---

一种新型奥氏体时效钢激光熔覆涂层及其高温耐磨性

【摘要】：采用激光熔覆制备了一种新型奥氏体时效钢涂层,以提高AISI H13钢的高温磨损性能。对奥氏体时效钢涂层和 H13 钢进行了 400°C 至 600°C 的磨损试验。对它们的高温磨损性能进行了比较研究；阐明了在 400°C 到 600°C 下各种载荷下的磨损机制。新型奥氏体时效钢涂层具有优异的高温耐磨性。相比之下，由于热软化，H13 钢在 400°C 到 600°C 下的耐磨性较差，尤其是在 600°C 下承受 150 N 的高载荷时。在高温磨损期间，摩擦氧化物层和次表面基质的协同作用决定了磨损行为和机制。与H13钢相比，由于金属间化合物的析出强化，较高的抗热软化能力确保了摩擦氧化层的稳定存在，从而使奥氏体时效钢具有优异的高温耐磨性。因此，对于新型奥氏体时效钢涂层，氧化轻度磨损在 400°C 至 600°C 下占主导地位，而没有发生挤压磨损。