【摘要】 通过物理—化学相分析及其它物理手段对经900℃不同时间时效的GH220合金的渗铝层进行了逐层相分析。用联立方程分别求出离表面不同深度范围内β—NiAl相γ′相的含量。通过修正比重,对取层厚度进行了合理计算。提供了渗铝层中相变趋势。本文把计算过程全部编成程序。对微处理机在相分析中的运用作了初步尝试。更多还原

【Abstract】 Layer by layer phase analysis of aluminide coating of a Ni - base supe-ralloy GH220 is carried out by physicochemical phase aaalysis and other physical instruments. The used samples of this alloy is aged at different time. Contents of β- NiAl and γ’ phases within various depth from coating surface was determined through simultaneous equations. The reasonable calculation of removed coating thickness is mado by correcting density. Trend of phase transformation in alurninids coating is presented. All calculations in this paper are programmed. Application of microcomputer in phase analysis is initially tried.更多还原