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在真空感应炉中熔炼高级合金时,由于一般用的坩埚材料都是氧化物,可能由于其分解而向熔池供氧,对合金的脱氧过程发生干扰,影响成品的含氧量,从而影响其性能。近年来国内外与这个问题有关的一些研究结果见。有人曾在电熔氧化镁坩埚中熔炼纯铁时,发现坩埚供氧速率相当于使熔池含氧量每分钟增长0.0005％。值得指出的是,过去的工作都着重于熔池形成以后,即金属熔化完毕以后的反应过程;对熔化过程中坩埚的供氧情况则很少涉及。在本工作中,用几种不同的氧化镁坩埚,在不同条件下熔炼纯镍,目的是寻找金属中含氧量变化的规律。给控
When the high-grade alloy is melted in a vacuum induction furnace, the crucible materials generally used are oxides, which may supply oxygen to the molten pool due to decomposition, interfere with the deoxidation process of the alloy and affect the oxygen content of the finished product, performance. In recent years, some domestic and foreign research results related to this issue have been found. Someone once melted pure iron in a fused magnesia crucible and found that the oxygen feed rate to the crucible corresponded to an increase of 0.0005% oxygen content per minute. It is worth pointing out that all the work in the past focused on the reaction process after the molten pool was formed, that is, after the metal was melted; the oxygen supply to the crucible in the melting process was rarely involved. In this work, several different magnesia crucibles are used to smelt pure nickel under different conditions, aiming at finding the law of variation of the oxygen content in the metal. Give control