牙用钛合金TC4 ，使用渗氮表面技术处理。
Titanium alloy material (TC4) samples were treated with nitriding technique.
渗氮在钢表面获得远远超出正常标准的硬度。其硬度范围为900到1,100布氏硬度，这远高于普通表面硬化所获得的硬度。
Nitriding develops extreme hardness in the surface of steel. This hardness ranges from 900 to 1,100 Brinell, which is considerably higher than that obtained by ordinary case hardening.
结果表明，交流脉冲放电在抑制弧光放电和空心阴极效应方面是非常有效的，对于高铬钢材料表面的离子渗氮作用是明显的。
The results indicate that it has visible effect on restraining arc discharge and hollow cathode discharge as well as ion nitriding on high-chrome steel material surface.
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