采用差示扫描量热(DSC)、等温淬火和显微组织分析方法对比分析含硼量为0.005％(质量分数,下同)和0.03％的IC10合金显微组织及组成相的形成过程,研究不同硼含量合金中初生相的析出温度及析出顺序.结果表明:DSC的冷却曲线上可显示出γ、MC碳化物、(γ+γ')共晶以及次生γ'的析出峰,但微量相M3B2硼化物和Ni5 Hf相未能显示.等温淬火法可以确定所有相的析出温度.不同含硼量合金的相组成相同,按形成先后顺序六种相分别为γ、MC、(γ+γ')共晶、次生γ'、M3B2和Ni5 Hf.IC10合金含硼量的增加,显著提高了M3B2和(γ+γ')共晶的含量(体积分数),使合金液相线和固相线温度降低,同时延缓了MC碳化物和(γ+γ')共晶的形成.
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