球磨时间对钼钨合金粉物理性能及烧结特性的影响

EFFECT OF MILLING TIME ON PHYSICAL PROPERTIES AND SINTERING CHARACTERISTIC OF MOLYBDENUM-TUNGSTEN ALLOY POWDER

本文采用球磨法制备了含30%钨的钼钨合金粉末,分析了不同球磨时间对钼钨合金粉的微观形貌、松装密度、费氏粒度等物理性能及烧结特性的影响。结果表明:随着球磨时间的延长,钼钨合金粉的颗粒团聚减少,松装密度增大,费氏粒度减小,烧结态相对密度增大。当球磨时间在20 h以上时,钼钨合金粉的颗粒分布均匀,松装密度增大至2. 07 g/cm^3以上,费氏粒度减少至3. 20μm以下,烧结态相对密度达到99%以上。

In this paper,molybdenum-tungsten alloy powder containing 30% tungsten was prepared by ball milling method. The effects of different milling time on the physical properties,apparent density,Fischer-particle size and other sintering properties of molybdenum-tungsten alloy powder were analyzed. The results show that with the increase of ball milling time,the particle agglomeration of molybdenum-tungsten alloy powder decreases,the apparent density increases,the Fischer particle size decreases,and the relative density of sintered state increases. When the ball milling time is above 6 h,the particle distribution of the molybdenum-tungsten alloy powder is uniform,the apparent density is increased to 2. 07 g/cm^3 or more,the Fischer particle size is reduced to 3. 20μm or less,and the relative density reaches 99% the above.