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对调质态45钢进行深层QPQ及普通QPQ处理,通过SEM、EDS、金相显微镜和盐雾试验,研究了渗层的显微组织、氮氧元素分布及耐蚀性,并进行对比。结果表明:在一定范围内,随着渗氮温度的升高,试样的耐腐蚀性逐渐增强;渗氮温度640～660℃时,耐蚀性最好。深层QPQ技术与普通QPQ技术处理的试样渗层氮氧元素分布基本一致,耐蚀性决定于渗层中的化合物层,化合物层越深,耐蚀性越好。
The QPQ and QPQ were treated with QPQ and QPQ. The microstructure, nitrogen and oxygen distribution and corrosion resistance of the infiltrated layer were studied by SEM, EDS, optical microscope and salt spray test. The results show that the corrosion resistance of the samples increases with the increase of the nitriding temperature within a certain range, and the corrosion resistance is best when the nitriding temperature is 640-660 ℃. The deep layer QPQ technology and ordinary QPQ technology sample layer nitrides distribution basically the same, the corrosion resistance is determined by the compound layer in the layer, the deeper the compound layer, the better the corrosion resistance.