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通过机械合金化制备了Fe-Cr-W-Ti-Y-(O)合金粉末,研究了球磨时间和球磨介质硬脂酸添加量对粉末特性的影响.结果表明:随着球磨时间的延长,元素粉末的合金化程度、加工硬化效应及氧元素含量提高,晶粒尺寸减小;球磨48h后,W和Cr原子已完全固溶于α-Fe中,合金粉末晶粒尺寸减小至14.0nm,显微硬度(HV)为613.4,氧含量(质量分数)达到0.935%;加入一定量的硬脂酸可以有效地阻碍粉末颗粒的团聚并优化粉末的颗粒形貌和粒度分布,但会延缓粉末合金化进程.
The effects of ball milling time and the amount of stearic acid added on the powder properties were studied by mechanical alloying.The results showed that with the increase of ball milling time, The degree of alloying of the elemental powder, the work hardening effect and the oxygen content increase, and the grain size decreases. After milling for 48h, the W and Cr atoms are completely dissolved in the α-Fe, and the grain size of the alloy powder is reduced to 14.0nm , The microhardness (HV) is 613.4, and the oxygen content (mass fraction) is 0.935%. Adding a certain amount of stearic acid can effectively hinder the agglomeration of the powder particles and optimize the particle morphology and particle size distribution of the powder, Alloying process.