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分析了热剪刃的综合力学性能要求，并对表面堆焊高耐磨合金层的显微组织和性能进行了研究。结果表明，表面堆焊层显微组织为回火马氏体＋碳化物，具有较高的热强度和红硬性；热剪刃经表面堆焊修复后，使用寿命提高１倍以上。
The comprehensive mechanical properties of the hot cutting edge were analyzed, and the microstructure and properties of the high wear-resistant alloy surfacing layer were studied. The results show that the microstructure of the surfacing layer is tempered martensite + carbides with high hot strength and red hardness. The service life of the hot cutting edge repaired by surface surfacing is more than doubled.