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采用化学镀工艺在不锈钢表面获得了Ni-Cr-P合金镀层。研究了Ni-Cr-P非晶态合金膜随热处理温度升高,其结构以及显微硬度和耐蚀性的变化规律,并对变化的原因进行了分析。结果表明,镀态Ni-Cr-P为非晶态镀层,200℃热处理开始晶化,到400℃时Ni3P晶化比较完全,800℃时Ni3P完全分解,生成含Ni、Cr、Fe的合金膜的Cr2Ni3和FeNi2P相。其显微硬度随热处理温度升高而升高,500～600℃之间显微硬度略有下降,600～700℃又随着热处理温度的升高而略有升高,700℃后显微硬度略有下降;合金膜的耐腐性在热处理温度200～400℃间变化较小,500℃热处理后其耐腐蚀性下降厉害,600～700℃随着热处理温度的升高其耐腐蚀性又略有升高,800℃后由于Ni3P的分解其耐腐蚀性又急剧下降。
Ni-Cr-P alloy coating was obtained on stainless steel by chemical plating. The variation of Ni-Cr-P amorphous alloy film with the increase of heat treatment temperature, its structure, microhardness and corrosion resistance were studied. The reason of the change was also analyzed. The results show that Ni-Cr-P coating is amorphous, and it begins to crystallize at 200 ℃. When it reaches 400 ℃, Ni3P crystallizes completely. When Ni3P is completely decomposed at 800 ℃, Ni, Cr and Fe alloy films are formed Of Cr2Ni3 and FeNi2P phases. The microhardness increases with the increase of the heat treatment temperature. The microhardness decreases slightly from 500 ℃ to 600 ℃, and slightly increases with the increase of the heat treatment temperature from 600 ℃ to 700 ℃. The microhardness Slightly decreased; the corrosion resistance of the alloy film in the heat treatment temperature of 200 ~ 400 ℃ change less after 500 ℃ heat treatment, its corrosion resistance decreased dramatically, 600 ~ 700 ℃ with the heat treatment temperature of its corrosion resistance slightly There is a rise, after 800 ℃ due to the decomposition of Ni3P its corrosion resistance dropped sharply.