摘要
采用化学镀的方法,调整Ni-P化学镀工艺参数及使用热处理工艺,获得了不同微观结构的镀层。并使用电子探针,XRD,显微硬度测试仪及摩擦磨损试验仪研究了镀层性能。结果表明,增加镀层纳米相含量可以提高镀层的显微硬度,其值可以达到400℃热处理时的硬度。强化机理包括固溶强化和析出强化,这取决于镀层中的磷含量和热处理温度。进一步的摩擦磨损实验结果表明,纳米相含量高的镀层在400℃热处理前后均表现出较好的显微硬度以及较低的摩擦系数,具有良好的抗磨损能力。
The deposits of electroless Ni-P prepared by different process were studied by means of EPMA, XRD, microhardness tester, friction-wear instrument. The experimental results show that the microhardness of the deposits will change with different microstructures and heat treatment temperatures. The microhardness of as-plated deposit will increase upon increasing the content of the nanocrystalline phase in the matrix, which can be up to the microhardness of the Ni-P deposit heat treated at 400 ℃ for 1 h. The strengthening mechanism for Ni-P deposit is either solid solution strengthening or precipitation strengthening, which depends on the phosphorus content and the heat treatment temperature. The friction-wear results show that the Ni-P deposits consisting of more nanocrystalline phase exhibit better microhardness, lower friction coefficient before and after heat treatment at 400 ℃, and good wear-resistant performances.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第1期11-16,共6页
Rare Metal Materials and Engineering
基金
Fundamental Research Funds for the Central Universities(2012QNA26)
National Natural Science Foundation of China(51006117,51271099)
Special Financial Grant from the China Postdoctoral Science Foundation(2012T50524)
关键词
表面改性
XRD
硬度
摩擦磨损
磨损机理
surface modification
XRD
hardness
friction-wear
wear mechanisms
作者简介
程延海，男，1977年生，博士，博士生导师，中国矿业大学机电工程学院，江苏徐州221116，E-mail：chyh1007@cumt．edu．cn
