摘要
采用４种典型的ＷＣ系硬质合金粉末与Ｗ－Ｎｉ复合粉末研究了粉末结构、粘结相的成分与含量以及超音速火焰喷涂（ＨＶＯＦ）条件对涂层结合强度的影响。结果表明：对于具有高熔点的ＷＣ及Ｗ颗粒构成的复合粉末ＨＶＯＦ涂层的结合强度大于粘结胶的强度（约６５ＭＰａ）几乎不受粉末结构和粘结相成分的影响。试验表明：喷涂粒子具备液固两相结构是ＨＶＯＦ涂层获得高结合强度的必要条件，而ＷＣ与Ｗ的高密度是保证ＨＶＯＦ涂层高结合强度的充分条件。
The effects of type and composition of the binder phase in WC cermet and structure of WC-Co powder as well as spraying conditions of high velocity oxy-fuel (HVOF) spraying on the adhesive strength of sprayed coatings were studied in this paper using four types of WC cermet powders and one aggregated W-Ni composite powder. It was found that the adhesive strength over the strength of adhesives (about 65 MPa) could be reached for all HVOF coatings. The adhesive strength of HVOF WC cermet coatings was not significantly influenced by the composition of binder and powder structure. The results showed that for getting HVOF coating with a high adhesive strength the formation of a solid-liquid two-phase droplet in HVOF process was a necessary condition. Moreover, the high density of WC and W particles in the powder was also in portant.
出处
《中国表面工程》
EI
CAS
CSCD
2000年第2期1-4,共4页
China Surface Engineering
基金
国家自然科学基金
关键词
超音速火焰喷涂
结合强度
金属陶瓷涂层
HVOF, WC cermet, W-Ni coating, adhesive strength, corrosive wear
