With the lower preheating coefficient,higher expansion coefficient and characteristics of good wear resistance,medium manganese steel has a wide industrial application.But its operation environment is appalling.It is often subjected to outside pressure constantly,and in the process of casting it forms surface defects such as pores and inclusions.So the damage of medium manganese steel is often due to fatigue rupture.To solve this problem,surface modification technology was used weld SHS ceramic electrode to tank armored tracked surface.This approach makes the surface of the medium manganese steel contains a large number of TiC particles.As can be seen from the experi-mental results,the manganese steel substrate changed inconspicuously.But the surface of the substrate organization changed obviously after ceramic phase fusing into substrate.The combination of TiC particles and the high manganese steel substrate was excellent,and the substrate surface did not produce obvious crack.TiC particles effectively im-proved the medium manganese steel′s hardness and wear resistance.%中锰钢预热系数小，膨胀系数高且具有良好的耐磨特性，在工业领域应用广泛。但因其运行环境恶劣，常受到外界压力的持续冲击，加之铸造过程中表面形成气孔、夹杂等缺陷使得中锰钢常因疲劳而破裂损坏。为了解决这一问题，运用表面改性技术，使用自蔓延特种陶瓷焊条对坦克装甲履带中锰钢表面进行焊接，在中锰钢的表面熔入大量的 TiC 颗粒。实验结果表明：熔有陶瓷相的中锰钢的表面组织更加均匀，气孔明显减少，并且 TiC 陶瓷相均匀分布在中锰钢中，与中锰钢组织结合良好，无明显裂纹出现。实验证明 TiC 陶瓷相的加入可有效地提高中锰钢的硬度和耐磨性能。
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