利用自行设计的脉冲电流发生装置和高温坩埚炉研究了脉冲电流对Fe70Cr18Ni12合金凝固组织的影响.结果表明,脉冲电流可明显细化Fe70Cr18Ni12合金的凝固组织,使该合金的晶粒尺寸由240 μm细化到1.8 μm;同时脉冲电流处理可改变合金凝固组织中奥氏体相和铁素体相的相对含量.
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