引用本文:李长久,王豫跃 王豫跃,大森明.粉末结构对超音速火焰喷涂WC系金属陶瓷涂层结合强度的影响[J].中国表面工程,2000,(2):1~4
.Effect of Powder Structure on the Adhesive Strength of HVOF Sprayed WC Cermet Coatings[J].China Surface Engineering,2000,(2):1~4
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粉末结构对超音速火焰喷涂WC系金属陶瓷涂层结合强度的影响
李长久,王豫跃 王豫跃,大森明
作者单位
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结胶的强度，几乎不受粉末结构和粘结相成分的影响。试验表明：喷涂料子具备液固两个相结构是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
关键词:  超音速火焰喷涂 结合强度 金属陶瓷涂层
DOI：
分类号:TG174.442 TF125.31
基金项目:国家自然科学基金资助项目
Effect of Powder Structure on the Adhesive Strength of HVOF Sprayed WC Cermet Coatings
Li Changjiu  Wang Yuyue  Akira Ohmori
Abstract:
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.
Key words:  HVOF, WC cermet, W-Ni coating, adhesive strength, corrosive wear,
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