Ni-P-金刚石化学复合镀层与钢基的扩散  

STUDY ON ELEMENTAL DIFFUSION BETWEEN STEEL SUBSTRATE AND ELECTROLESS COMPOSITE COATING Ni-P-DIAMOND

作　　者：谢华[1,2] 陈文哲[1] 钱匡武[1,2] 

机构地区：[1]福州大学机械系 [2]中南工业大学材料学院,长沙410083

出　　处：《金属学报》2001年第8期841-844,共4页Acta Metallurgica Sinica

基　　金：福建省科技立项费用资助 K96008

摘　　要：本文采用金相观察、能谱分析、Ｘ射线衍射分析等手段，着重研究了在中碳钢衬底上施镀的Ｎｉ－Ｐ－金刚石复合镀层经中、低温热处理后，镀层与衬底间的扩散问题．结果表明，镀件经 ２００—８００℃ ，各 １ｈ的热处理后，镀层与衬底间发生 Ｆｅ、Ｎｉ元素的相互扩散，Ｆｅ元素在镀态时即有扩散现象，而Ｐ的扩散很弱．经６００℃，１ｈ热处理后，由于扩散的影响，镀层内Ｎｉ元素呈梯度分布；镀件经８００℃，１ｈ热处理后并空冷，扩散层中主要形成了γ（Ｎｉ，Ｆｅ）相．The elemental diffusion between medium carbon steel substrate and electroless Ni-P-diamond composite coating was measured. The results show that the diffusion between the substrate and the coating takes place when the specimens are heat-treated under a low or medium temperature, and sometimes a diffusion layer is formed. Diffusional elements are Ni, Fe and P. in which P diffuses weakly, Fe diffuses strongly and even before heat-treatment Fe can also diffuse. When the specimen was heat-treated at 800 degreesC for 1 h and then air-cooled, the phase gamma (Ni,Fe) is formed.

关 键 词：Ni-P-金刚石 化学复合镀层 钢基 扩散 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG111.6[金属学及工艺—金属学]