粉末高温合金中亚稳碳化物稳定化处理

金属学报, 1991, 27(3): 131-135.

粉末高温合金中亚稳碳化物稳定化处理

北京科技大学

北京航空材料研究所

关键词：高温合金 , carbide , powder metallurgy , heat treatment

STABILIZATION OF NON-EQUILIBRIUM CARBIDES IN POWDER SUPERALLOY RENE 95

HU Benfu , LI Huiying , ZHANG Shouhua University of Science and Technology Beijing , MAO Jian , ZHOU Ruifa Institute of Aeronautical Materials

Keywords： superalloy , 碳化物 , 粉末冶金 , 热处理

在热等静压之前对Rene95合金粉末采用高温预热处理。试验结果表明,预热处理既可使粉末颗粒微观组织更加均匀化,又可使亚稳碳化物MC′发生分解和转变,重新析出二次MC+?和生成M_(23)C_6碳化物。明显改变碳化物的稳定性和分布状态,有效地抑制PPB的形成。

The high temperature pre-heat treatment was used for Rene95 pow-der-particles before HIP consolidation. It is shown that during pre-heat treatment,the microstrucutre of the powder-particles may be more homogenized and the non-equilibrium carbides can be transformed into stable carbides MC. The appropriatecontrol of this transformation may suppress the formation of detrimental PPB car-bides.

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