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首页> 外国专利> INDUCTION MELTING APPARATUS EMPLOYING HALIDE TYPE CRUCIBLE, PROCESS FOR PRODUCING THE CRUCIBLE, METHOD OF INDUCTION MELTING, AND PROCESS FOR PRODUCING INGOT OF ULTRAHIGH-PURITY Fe-, Ni-, OR Co-BASED ALLOY MATERIAL

INDUCTION MELTING APPARATUS EMPLOYING HALIDE TYPE CRUCIBLE, PROCESS FOR PRODUCING THE CRUCIBLE, METHOD OF INDUCTION MELTING, AND PROCESS FOR PRODUCING INGOT OF ULTRAHIGH-PURITY Fe-, Ni-, OR Co-BASED ALLOY MATERIAL

机译：采用卤化物型坩埚的感应熔炼装置，生产坩埚的方法，感应熔炼方法以及生产超高纯度铁，镍或钴基合金的合金的方法

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There is provided an induction-melting apparatus capable of exhibiting high refining performance without inflicting damage to a crucible even if a halide-compound base refining flux is used upon induction-melting of an ultrahigh-purity high melting-point metal, having a melting point reaching 1500°C, and a method for induction-melting using the same. There is also provided a melting method for enabling production of ultrahigh-purity Fe-base, Ni-base, and Co-base alloying materials, each having an impurity level of (C + O + N + S + P) 100 ppm, and Ca 10 ppm, and in the form of a large ingot. Further, with the induction-melting apparatus, a plurality of tubular segments are disposed so as to be cylindrical in shape, a gap in a range of 1.5 to 15 mm in distance is provided between the respective tubular segments adjacent to each other, and a layer composed of any substance selected from the group consisting of single chemical elements of halides of metal elements of the specific of the Periodic Table of the Elements, or frommixtures of the halides, oxides, and carbides, or nitrides of the metal elements is formed in each of the gaps, and on an inner peripheral surface of a peripheral body part of a crucible. There is also provided method for induction-melting an Fe-base alloy, and so forth, using a halide-base flux while forcibly cooling the crucible. A refining flux composed of any selected from the group consisting of metal elements of the Groups IA, IIA, or IIIA of the Periodic Table of the Elements, oxides thereof, halides thereof, halide single elements or halides selected from the group of halides, or mixtures of the metal elements, and the oxides thereof is added to be thereby turned into a molten state, primary melting is executed by holding a state of a molten metal being in contact with the refining flux before tapping, the molten metal is caused to undergo solidification inside a mold, thereby producing a primary ingot and subsequently secondary melting is executed by an electron-beam melting method whereby while the primary ingot is sequentially melted in a water-cooled copper mold at a low pressure, the molten metal as-solidified state is pulled out from an outlet side of the water-cooled copper mold, thereby forming an ingot product.
机译：本发明提供一种感应熔炼装置，即使在具有熔点的超高纯度高熔点金属的感应熔炼中使用卤化物化合物的基础熔炼剂的情况下，也能够发挥高的熔炼性能而不会对坩埚造成损害。达到1500℃的方法，以及使用该方法进行感应熔化的方法。还提供了一种熔化方法，该方法能够生产超高纯度的铁基，镍基和钴基合金材料，每种材料的杂质含量为（C + O + N + S + P）<100 ppm， Ca <10 ppm，且呈大锭状。另外，在感应熔融装置中，多个圆筒状的筒状部配置成圆筒状，在彼此相邻的各个筒状部之间设置有1.5〜15mm的范围的间隙。在该层中形成由以下物质组成的层，该物质选自元素周期表中特定的金属元素的卤化物的单个化学元素，或金属元素的卤化物，氧化物和碳化物或氮化物的混合物每个间隙，并且在坩埚的外围主体部分的内周表面上。还提供了一种利用卤化物基熔剂在强制冷却坩埚的同时感应熔化Fe基合金等的方法。精炼剂，其选自元素周期表的IA，IIA或IIIA族的金属元素，其氧化物，其卤化物，卤化物单元素或选自卤化物组的卤化物，或加入金属元素的混合物，并使其氧化物转变为熔融态，通过在出钢前保持熔融金属与精炼剂的接触状态来进行初熔，使熔融金属经历在模具内部固化，从而产生一次铸锭，随后通过电子束熔化方法进行二次熔化，由此在将一次铸锭在低压下在水冷铜铸模中依次熔化的同时，熔融金属保持凝固状态从水冷铜模具的出口侧拉出铸锭，从而形成铸锭产品。

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