电喷镀镍磷合金镀层的工艺参数优化

Process Parameters Optimization of Electric Plating Ni-P Alloy Coating

为获得较高的沉积速度、较大的显微硬度及较好的表面粗糙度,采用JMP定制设计器进行工艺试验设计。运用逐步逼近法分析工艺参数对沉积速度、显微硬度及表面粗糙度的影响规律,建立了回归模型,并对响应曲面进行了分析。利用期望函数法对多响应的工艺参数进行优化,确定了试验范围内达到意愿最大化的最佳工艺参数,即电压17 V、镀液温度62℃、两极间隙1.4 mm、相对运动速度142 mm/min。此工艺条件下的镀层沉积速度、显微硬度及表面粗糙度的预测值分别为57.19μm/min、725.57 HV、Ra0.256μm,实际值分别为56.03μm/min、717.09 HV、Ra0.265μm,相对误差分别为2.1%、1.2%、3.4%;且模型可靠,优化后的镀层光滑致密,质量良好。

In order to obtain higher deposition rate ,larger micro hardness and better surface roughness,the customized designer of JMP was used to design the process experiment. Successive approximation was used to analyze the influence law of process parameters on the deposition rate ,micro hardness and surface roughness,and regression models of each response were established to take analysis of the response surface plots. Expectations function was used to optimize multiple response and the optimal technology parameters are voltage of 17 V ,electrolyte temperature of 62 ℃,dipolar gap of 1.4 mm,dipolar relative velocity of 142 mm/min. Under these conditions,the predicted values of deposition rate,micro hardness and surface roughness are 57.19 μm/min,725.57 HV,Ra0.256 μm,and the actual values are 56.03 μm/min,717.09 HV,Ra0.265 μm,and the relative errors are 2.1 %,1.2%,3.4%. The models are reliable and the quality of the deposited layer is better.