高碳钢表面Ni-P/纳米Ti(C,N)化学复合镀研究

Ni-P/nano-Ti(C,N) Electroless Composite Depositing on T10A Steel

研究了高碳钢表面Ni-P/纳米Ti(C,N)化学复合镀工艺以及热处理对复合镀层性能的影响。结果表明:施镀工艺中各因素对镀速影响的显著性顺序是pH值>镍磷比>施镀温度>纳米Ti(C,N)加入量;较好的施镀工艺为硫酸镍为25g/L、次亚磷酸钠为29.9g/L、乳酸为34g/L、乙酸钠为4g/L、PbCl2为0.001g/L、Ti(C,N)为6g/L、pH值为4、施镀温度为80℃;复合镀层较佳的热处理工艺为400℃保温45min,空冷。在最佳工艺下,得到的Ni-P/纳米Ti(C,N)复合镀层的硬度为975.2HV,是高碳钢基体硬度的3.8倍,且镀层与基体的结合力强。

The process of Ni-P/nano-Ti(C,N) electroless composite plating on T10A steel and the influences of heat treatment parameters on the hardness of this deposited film were systematically studied. The results showed that the significance of the factors influencing the electroless composite processing decreased according to the following order; pH>x> temperature> concentration of nano-Ti(C,N). An optimal electroless composite process was proposed as follows: NiSO4·6H2O of 25 g/L, NaH2PO2·H2O of 29. 9 g/L, lactic acid of 34 g/L, NaAc of 50 g/L, PbCl2 of 0. 001 g/L, nano-Ti(C,N) of 6 g/L, pH of 4 and plating temperature of 80℃. An optimal heat treatment processing was proposed as follows: temperature of 400℃, holding time of 45 min. Under the optimal operating conditions of the scheme, the hardness of Ni-P/nano-Ti(C,N) electroless composite coating was 3. 8 times as hard as that of T10A