摘要
为了改善钛合金的耐磨性及抗微动损伤能力，对Ｔｉ６Ａｌ４Ｖ合金的化学镀ＮｉＰ工艺进行了研究，发现应用一种由化学除油→化学浸蚀→表面活化→化学镀ＮｉＰ的新工艺路线，可获得高质量的ＮｉＰ镀层。通过扫描电镜、Ｘ射线衍射及硬度测量，对镀层在稳定化处理过程中的显微组织及硬化效应进行了测定与分析。试验结果表明，ＮｉＰ镀层在３００℃～６００℃范围内的稳定化过程中逐渐晶化，而由原先的非晶态转化为晶态ＮｉＰ层。经过适当的稳定化处理可明显提高镀层硬度，并在ＮｉＰ镀层与基体金属间形成一个过渡带，有利于改善ＮｉＰ镀层的性能和附着力。镀层的硬度可根据需要，通过改变稳定化参数而加以控制。
In order to improve wearability and fretting damage resistance, the effect of electroless NiP deposited on surface of a Ti6Al4V alloy has been studied. A high quality NiP deposit has been obtained using a new process consisting of: chemical cleaning oil→chemical etching→surface activation→electroless NiP deposit. The microstructure and hardening behavior of the NiP deposit during stabilizing treatment were determined and analysed by SEM, Xray diffraction and hardness measurement. The experimental results show that the structure of the NiP deposit gradually crystallizes, during stabilization at temperature of 300℃600℃. After suitable heat treatment, the hardness of the NiP deposit increases substantially; also transition zone that gorms between the NiP deposit and the metal matrix signficantly improves the performance and adhesion of NiP deposit. Depending on the requirements, the hardness of deposit can be adjusted by changing the stabilization parameters.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1998年第2期107-111,共5页
Rare Metal Materials and Engineering
关键词
化学镀
TI-6AL-4V合金
钛合金
electroless NiP deposit, microstructure, performance, Ti6Al4V alloy
