以石墨为电极，采用电火花沉积工艺在BT20钛合金表面沉积了TiC颗粒得到了强化层，并对该强化层的组织和硬度进行了研究。结果表明：强化层分布不连续，厚度也不均匀，最厚处可达30μm，最薄处还不到10μm；强化层中TiC颗粒的分布不均匀，大量TiC聚集于强化层表面，内部很少，这使得强化层表面硬度达到了基体的5倍以上。
Taking the graphite as electrode, TiC particles were deposited on BT20 titanium alloy surface by eletrospark processing to form a reinforced coating. The mierostructure and microhardness of the coating were studied. The results show that the coating was discontinuous and uneven with the thickness of 10--30μa. The distribution of TiC particles in the reinforced coating was non-uniform, most of TiC existed on the reinforced coating surface and a little inside of the reinforced coating, which made the microhardness of the reinforced coating 4 times higher than that of the titanium alloy substrate.
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