简介概要

Abrasion Resistance Enhancement of Ultrafine-structured WC-Co Coating Fabricated by using in situ Synthesized Composite Powder

来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2013年第11期

论文作者:Haibin Wang Xiaoyan Song Chongbin Wei Yang Gao Guangsheng Guo

文章页码:1067 - 1073

摘    要:The ultrafine WC—Co composite powder was synthesized by a newly developed rapid route based on in situ reactions.By using the as-synthesized composite powder,the granulation processing was then carried out to prepare the ultrafine-structured thermal spraying feedstock.The influences of the heat-treatment process on density of the feedstock powder,phase constitution and wear resistance of the resultant WC—Co coatings fabricated by high velocity oxy-fuel(HVOF) were investigated.The results showed that increasing the heating temperature and extending the holding time leaded to remarkable increase in the density and flowability of the feedstock powder.As a result,the decarburization of the in-flight particles could be decreased and the wear resistance of coating was significantly enhanced.The present study demonstrated that the developed techniques for the ultrafine powder and its thermal-sprayed coatings had very promising applications in scaling up to produce ultrafine-structured cermet coatings with excellent performance.

详情信息展示

Abrasion Resistance Enhancement of Ultrafine-structured WC-Co Coating Fabricated by using in situ Synthesized Composite Powder

Haibin Wang,Xiaoyan Song,Chongbin Wei,Yang Gao,Guangsheng Guo

College of Materials Science and Engineering,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology

摘 要:The ultrafine WC—Co composite powder was synthesized by a newly developed rapid route based on in situ reactions.By using the as-synthesized composite powder,the granulation processing was then carried out to prepare the ultrafine-structured thermal spraying feedstock.The influences of the heat-treatment process on density of the feedstock powder,phase constitution and wear resistance of the resultant WC—Co coatings fabricated by high velocity oxy-fuel(HVOF) were investigated.The results showed that increasing the heating temperature and extending the holding time leaded to remarkable increase in the density and flowability of the feedstock powder.As a result,the decarburization of the in-flight particles could be decreased and the wear resistance of coating was significantly enhanced.The present study demonstrated that the developed techniques for the ultrafine powder and its thermal-sprayed coatings had very promising applications in scaling up to produce ultrafine-structured cermet coatings with excellent performance.

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