利用OM、SEM、EDS和XRD等测试手段研究了球磨转速和球磨时间对14Cr-ODS合金粉的形貌、显微结构及物相的影响.结果表明,转速为250 r/min时,随着球磨时间的延长,粉末粒径增大,16 h时基本稳定;点阵参数增大,晶粒尺寸不断减小并趋于稳定;12 h时颗粒内部出现层状结构并不断细化直至消失,颗粒成分更接近名义成分.12 h时合金化已开始,持续球磨使合金化程度提高,30 h时基本实现合金化.合金化过程可分为包覆、粘结、分层、细化、均匀化5个阶段.当转速提高到300 r/min时,合金化进程加快.
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