采用软件抗干扰不需增加硬件设备、可靠性高、稳定性好、功能多样、使用灵活，可在一定程度上实现“以软补硬”。
Then people pay more attention to antidisturbance by software, for its reliability, stability, function diversity, dexterity, it can make up the shortcoming of the hardware.
介绍了在已有铬层上补镀硬铬的方法，强调了补镀前表面净洁、反电刻蚀(阳极处理)、低电压小电流起镀等工艺的重要性及应注意的问题。
The importance of surface cleaning before replating, reverse electro-etching (anodic treatment) as well as low-voltage and small-current plating, and some problems needing attention were emphasized.
研究结果表明：在不预热条件下，用KD286焊补钢轨，焊缝组织为柱状奥氏体组织，熔合区和过热区不可避免地产生脆硬的马氏体组织。
The results show that:under the no preheating condition, the microstructure of weld metal is columnar austenitic, and brittle martensite exists in the fusion zone and over-heated zone unavoidably.
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