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采用脉冲等离子辉光渗金属技术在Q195钢表面铬-镍共渗形成合金层,并对合金层的表面形貌、相结构及铬、镍含量进行分析。利用MATLAB软件拟合合金层铬、镍成分曲线,计算其扩散系数、扩散激活能以及表面空位浓度。结果表明:随着距离表面渗层深度的增加,各元素的扩散激活能增加,元素的扩散速度减慢,合金元素含量减少;相同条件下,等离子渗金属比一般的气体渗金属空位浓度高2～3个数量级。
Pulsed plasma glow - infiltration metal technology was used to form the alloy layer on the surface of Q195 steel by chromium - nickel infiltration. The surface morphology, phase structure, chromium and nickel contents of the alloy layer were analyzed. Using MATLAB software to fit the alloy layer chromium, nickel composition curve, calculate the diffusion coefficient, diffusion activation energy and surface vacancy concentration. The results show that the diffusion activation energy of each element increases, the diffusion speed of elements slows down and the content of alloying elements decreases with the increasing of the depth of diffusion layer. Under the same conditions, the plasma infiltration metal is 2 ~ 3 orders of magnitude.