粉末特性对W-Ti[w(Ti)=10％]合金致密度和组织的影响OA北大核心CSTPCD

W-Ti[w(Ti)=10％]alloy was prepared,and the influence of powder purity and W powder size on the density and microstructure of W-Ti[w(Ti)=10％]alloy was studied.It is found that the higher the purity of powder,the higher the density of W-Ti[w(Ti)=10％]alloy,and the lower the Ti rich phase proportion.The W-Ti[w(Ti)=10％]alloy with 3N purity will retain pure Ti,and the proportion of Ti-rich phase is 31.28％.The W-Ti[w(Ti)=10％]alloy with 4N and 4N5 purity does not have pure Ti,and the proportion of Ti-rich phase is 28.41％and 21.67％,respectively.The influence of W powder particle size is reflected in two aspects:the larger the W powder particle size,the better the mixing effect with Ti powder,the more conducive to diffusion;but the smaller the specific surface area,the less conducive to diffusion.With the increase of W particle size,the Ti-rich phase content of W-Ti[w(Ti)=10％]alloy decreases first and then increases.In this experiment,when the particle size of W powder is 4～5 μm and the particle size of Ti powder is 44 μm,the microstructure properties of W-Ti[w(Ti)=10％]alloy are the best,and the proportion of Ti-rich phase is 28.79％.