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大量的实验结果表明,目前用来提取镍基合金y′相的电解液主要有四种(表2),而且实用的镍基超合金,只要铬含量在10～25％范围内,y′的粒度在150A以上并以颗粒分布在连续的基体中,采用公认的硫酸铵水溶液一般都是可以定量提取或接近于定量提取的。多数情况下,这四种电解液的提取量也是接近的。但是,我们发现,当合金低温时效产生了粒度小于100A的y′相时,硫酸铵水溶液的提取量就会大大偏低,上述四种电解液的提取量就会产生明显的差异。
A large number of experimental results show that there are mainly four kinds of electrolytes currently used to extract y ’phase of nickel base alloy (Table 2), and practical nickel base superalloy, as long as the chromium content is in the range of 10 to 25%, y’ Particle size distribution in 150A and above and in a continuous matrix, the use of generally accepted ammonium sulfate aqueous solution can be quantitatively extracted or close to the quantitative extraction. In most cases, the amount of extraction of these four electrolytes is also close. However, we found that the extract of ammonium sulfate aqueous solution will be significantly lower when the alloy has a y ’phase with a particle size of less than 100 A due to the low temperature aging of the alloy, and the extraction yields of the above four electrolytes will be significantly different.