CAJ | 학술논문

对氢化-破碎-脱氢(HMD)法制备U-10wt%Mo合金粉末的粒度控制工艺进行了研究.U-Mo合金在950℃分别退火4、10、24h,然后经过γ→α相转变热处理、HMD法和α→γ相转变热处理等过程成为粉末.分析结果表明:950℃下U-Mo晶粒长大较慢,可通过调节保温时间使晶粒尺寸控制在40～100μm;γ相分解程度强烈依赖于晶粒尺寸,晶粒尺寸越大,γ相向α相的转变程度越低;粉末粒度大小与原始合金γ相的晶粒度密切相关,原始合金γ相晶粒度越大,粉末粗粉比重越大.
대경화-파쇄-탈경(HMD)법제비U-10wt%Mo합금분말적립도공제공예진행료연구.U-Mo합금재950℃분별퇴화4、10、24h,연후경과γ→α상전변열처리、HMD법화α→γ상전변열처리등과정성위분말.분석결과표명:950℃하U-Mo정립장대교만,가통과조절보온시간사정립척촌공제재40～100μm;γ상분해정도강렬의뢰우정립척촌,정립척촌월대,γ상향α상적전변정도월저;분말립도대소여원시합금γ상적정립도밀절상관,원시합금γ상정립도월대,분말조분비중월대.
The granularity control of U-10wt%Mo alloy powder prepared by hydriding-millingdehydriding (HMD) method is introduced in this paper. U-Mo alloy is annealed for 4 h, 10 h and 24 h at 950 ℃. Then U-Mo alloy powder is prepared through the process of γ→α phase transition, hydriding-milling-dehydriding and α→γ phase transition. Analysis results indicates that the U-Mo grain grows slowly at 950℃, and the grain size could be controlled in the range of 40～100μm by adjusting time. The γ-phase transition is strongly depended on the grain size, and when grain is big, γ→α phase transition is difficult. The powder size is related tightly with the grain size in the initial γ-phase alloy, and when γ-phasegrain is big, the mass percent of coarse powder is high.