摘要 以Ca为还原剂,TiO2、V2O5和Al为原料,通过钙热自蔓延的方式制备低氧Ti6Al4V合金粉体。通过XRD、SEM-EDS、ICP以及氧氮氢分析仪等手段考察不同焙烧温度下TiO2的晶粒尺寸和比表面积的变化规律,以及不同焙烧温度对Ti6Al4V粉体产物的影响。结果表明:通过调节TiO2的焙烧温度可以改变TiO2的晶粒尺寸和比表面积,从而影响混料的均匀程度和反应时O2-的迁移路程,达到降低产物中氧含量的目的。当使用1 000 ℃焙烧过的TiO2作为原料时,可得到氧含量为0.187%(质量分数,下同)的产物(Al 6.62%, V 4.22%, Ca 0.032%)。
Abstract: Low-oxygen Ti6Al4V alloy powder was prepared by calciothermic self-propagation method with Ca as reducing agent and TiO2, V2O5 and Al as raw materials. XRD, SEM-EDS, ICP and oxygen nitrogen hydrogen analyzer were used to investigate the changes of grain size and specific surface area of TiO2 at different calcination temperatures,as well as the effects of different calcination temperatures on the products of Ti6Al4V powder. The results show that the grain size and specific surface area of TiO2 can be changed by adjusting the calcination temperature of TiO2, which affects the uniformity of the mixture and the moving path of O2- during the reaction, so as to reduce the oxygen content in the product. When TiO2 calcined at 1 000 ℃ is used as raw material, the production with an oxygen content of 0.187% (mass fraction) can be obtained (Al: 6.62%, V: 4.22%, Ca: 0.032% ).
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2022, Vol. 36 
