在不同热处理制度下对等离子旋转电极雾化(PREP)FGH95高温合金粉末颗粒进行预热处理, 并对热处理粉末颗粒微观组织、碳化物析出相及γ′相的变化规律进行研究.结果表明: 随着预热处理温度升高, 树枝晶组织逐渐消失, γ′相由圆形逐渐转变为方形, 粉末颗粒中的MC′型亚稳碳化物发生分解和转变, 析出稳定的MC, M23C6及M6C型碳化物.M23C6碳化物的析出温度为950℃, M23C6与M6C碳化物的相互转变温度为1000～1050℃, M23C6和M6C的溶解温度为1100℃.
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