Researches on Preparation Techniques of WC-10Co4Cr Powder
The morphology and density of WC-10Co4Cr powder have an impact on the structure of coatings.In this study,the spray drying method and vacuum sin tering technique were employed to synthesize WC-10Co4Cr powder.The influence of binder content,atomization plate rotation frequency,heating temperature,and sin tering time on the morphology and density of WC-10Co4Cr powder was investigated.The results show that sphericity of WC-10Co4Cr particles increases and then decreases as the content of polyethylene glycol increases.When the mass percentage of polyethylene glycol is 2.5%,the sphericity of WC-10Co4Cr particles is the highest.As the rotation frequency of the atomization plate increases,the diameter of WC-10Co4Cr particles decreases,and the sphericity of the particles first rises and then declines.The sphericity of WC-10Co4Cr particles is the highest when the rotation frequency of the atomization plate is 26 Hz.As the heating temperature rises,the density of WC-10Co4Cr particles increases while the sphericity of the particles decreases.The particles have high density and sphericity when the heating temperature is 1 275℃.As the sin tering time increases,the density of WC-10Co4Cr particles rises and the sphericity of the particles declines.The particles possess high density and sphericity when the sin tering time is 3 hours.
WC-10Co4Cr powderbindertemperature of heatingtime of sin tering
万方数据
维普
