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.
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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