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本文研究了一种能在高温盐酸苛刻介质中服役的低碳低铁型铸造Ｎｉ－Ｍｏ合金的组织及其局部腐蚀行为。通过金相显微镜、Ｘ射线衍射、电子探针和透射电镜与扫描电镜进行了金相组织分析，并采用快速模拟试验方法研究了该合金的局部腐蚀行为。试验结果表明，ＨａｓｔｅｌｌｏｙＢ－２型铸造镍基合金经１１８０℃×２ｈ水冷固溶处理后，其组织为全奥氏体时，该合金具有良好的耐晶间腐蚀性能和较高的抗点蚀性能。
This paper studies the microstructure and local corrosion behavior of a low-carbon, low-iron cast Ni-Mo alloy that can be used in high-temperature hydrochloric acid harsh medium. The microstructure of the alloy was characterized by metallographic microscope, X-ray diffraction, electron probe, TEM and SEM. The local corrosion behavior of the alloy was studied by rapid simulation. The experimental results show that the HastelloyB-2 cast Ni-base alloy has good intergranular corrosion resistance and high pitting corrosion resistance when its microstructure is fully austenite after being subjected to water-cooling solution treatment at 1180 ℃ × 2h. .