Electric arc furnace operation
    72.
    发明授权
    Electric arc furnace operation 失效
    电弧炉操作

    公开(公告)号:US4273576A

    公开(公告)日:1981-06-16

    申请号:US121510

    申请日:1980-02-14

    CPC classification number: C22B4/00 C22B23/02 C22B9/20

    Abstract: An improved method is described for the continuous shielded arc melting of calcine in an electric arc furnace to obtain molten slag, underlain by molten metal.The furnace is so operated that the major portion of the total energy supplied thereto is released in the arc, and the minor portion in the molten bath. The improvement consists of adjusting the electrical energy released in the bath, directly to obtaining a required active bath area calculated by means of the rate of change in the volume of the slag and indirectly to the silica:magnesia ratio in the slag. The optimum range of active bath area is derived from conditions required for the safe and continuous operation of the furnace, in order to protect the furnace walls from slag erosion and to avoid excessive electrode movement.

    Abstract translation: 描述了一种用于电弧炉中煅烧物的连续屏蔽电弧熔化以获得熔融金属下沉的熔融炉渣的改进方法。 炉子被操作,使得供应到其中的总能量的主要部分被释放在电弧中,并且熔融浴中的次要部分被释放。 该改进包括通过调节在浴中释放的电能,直接获得通过炉渣体积变化率计算的所需活性浴面积,间接地与炉渣中二氧化硅:氧化镁比例相比。 活性浴面积的最佳范围来自炉子安全和连续运行所需的条件,以保护炉壁免受炉渣侵蚀,并避免过度的电极移动。

    Method of treating boron-containing steel
    73.
    发明授权
    Method of treating boron-containing steel 失效
    处理含硼钢的方法

    公开(公告)号:US4251268A

    公开(公告)日:1981-02-17

    申请号:US92344

    申请日:1979-11-08

    Applicant: Fritz Willim

    Inventor: Fritz Willim

    CPC classification number: C21C7/0037 B22D11/11 C21C7/0006 C21C2007/0018

    Abstract: A method of treating boron-containing steel for continuous casting, especially for teeming or pouring into small sectional shapes or formats with unregulated nozzles. There is introduced into the molten steel located in the casting ladle, by means of an inert carrier gas, in a powder form calcium or a compound thereof, at least one element forming a stable nitride at the melt temperature of the steel and boron or a boron compound. The thus treated steel is protected from renewed reaction with air along its path between the ladle and the continuous casting mold.

    Abstract translation: 一种处理含硼钢用于连续铸造的方法,特别是用未调节的喷嘴浇注或浇注成小截面形状或形式。 通过惰性载气引入位于浇包中的钢水,粉末形式为钙或其化合物,在钢和硼的熔融温度下形成稳定的氮化物的至少一种元素,或 硼化合物。 防止这样处理的钢沿着钢包和连续铸造模具之间的路径与空气的更新反应。

    Method for producing ferro-alloys
    75.
    发明授权
    Method for producing ferro-alloys 失效
    铁合金生产方法

    公开(公告)号:US4156102A

    公开(公告)日:1979-05-22

    申请号:US734094

    申请日:1976-10-20

    CPC classification number: C21C5/5217 Y02P10/216

    Abstract: An improved method and apparatus for producing ferro-alloys from ore in which an ore is first mixed with a solid reducing agent, preheated and pre-reduced in a rotary kiln, and smelted in an electric furnace, in which the pre-reduced ore is heated by a burner provided in the electric furnace where it is also reoxidized. The ore is also heated in the rotary kiln by recycled gas.

    Abstract translation: 一种用于从矿石中生产铁合金的改进方法和装置,其中矿石首先与固体还原剂混合,在回转窑中预热和预还原,并在电炉中熔炼,其中预还原的矿石是 通过设置在电炉中的燃烧器加热,在那里它也被再氧化。 矿石也通过回收气体在回转窑中加热。

    Beryllium-containing iron-boron glassy magnetic alloys
    76.
    发明授权
    Beryllium-containing iron-boron glassy magnetic alloys 失效
    含铍铁硼玻璃状磁性合金

    公开(公告)号:US4152147A

    公开(公告)日:1979-05-01

    申请号:US894665

    申请日:1978-04-10

    CPC classification number: C22C45/02

    Abstract: Introduction of beryllium into iron-boron base glassy alloys improves the thermal stability while substantially retaining the saturation moment of the base alloy. The alloys of the invention consist essentially of about 10 to 18 atom percent boron, about 2 to 10 atom percent beryllium and about 72 to 80 atom percent iron plus incidental impurities.

    Abstract translation: {PG,1将铍引入铁 - 硼基玻璃状合金中,在大体上保持基体合金的饱和力矩的同时,提高了热稳定性。 本发明的合金基本上由约10-18原子百分比的硼,约2-10原子%的铍和约72-80原子%的铁加附加的杂质组成。

    Rare earth metal silicide alloys
    78.
    发明授权
    Rare earth metal silicide alloys 失效
    稀土金属硅化物合金

    公开(公告)号:US4018597A

    公开(公告)日:1977-04-19

    申请号:US602081

    申请日:1975-08-05

    Inventor: John O. Staggers

    CPC classification number: C22C30/00 C21C7/076 Y02P10/242

    Abstract: Rare earth metal silicide alloys comprising about 25 to about 40% rare earth metals, about 35 to about 50% Si, about 5 to about 25% Fe, about 2 to about 8% Ca, about 2 to about 4% Ba and about 1 to about 3% Sr, the proportions based on the weight of the alloy are disclosed. Also disclosed is a method of making rare earth metal silicide alloys and a method of treating high strength-low alloy steel with the rare earth metal silicide alloys of the invention.

    Abstract translation: 包含约25至约40%稀土金属,约35至约50%Si,约5至约25%Fe,约2至约8%Ca,约2至约4%Ba和约1%的稀土金属硅化物合金 至约3%的Sr,基于合金重量的比例被公开。 还公开了制备稀土金属硅化物合金的方法和用本发明的稀土金属硅化物合金处理高强度低合金钢的方法。

    Method of fabricating a contact material for high-power vacuum circuit
breakers
    79.
    发明授权
    Method of fabricating a contact material for high-power vacuum circuit breakers 失效
    制造高功率真空断路器接触材料的方法

    公开(公告)号:US4014689A

    公开(公告)日:1977-03-29

    申请号:US639708

    申请日:1975-12-11

    CPC classification number: C22C19/03 C22C14/00 C22C19/07 C22C38/00 C22C9/00

    Abstract: A method of fabricating a contact material for high-power vacuum circuit breakers. In the method, an alloy consisting essentially of a base metal having a melting point above about 1000.degree. C and below about 1800.degree. C, at least one alloying metal which will not form a solid solution with the base metal, and at least one auxiliary metal which forms a eutectic with the base metal are melted under vacuum at a temperature between about 1000.degree. C and about 1800.degree. C. The molten alloy is then slowly cooled so as to form fine grain crystals of the base metal and auxiliary metal in solid solution in the eutectic while the eutectic is a liquid and transfer gases expelled from the crystals during the cooling to the liquid eutectic to increase the concentration of gases in the liquid eutectic above an equilibrium concentration, cause evacuation of the gases from the liquid eutectic, and remove the gases from the alloy. The alloy is then cooled to rapidly solidify the liquid eutectic and precipitate the alloying metal as a fine dispersion in the eutectic.

    Abstract translation: 一种制造用于大功率真空断路器的接触材料的方法。 在该方法中,基本上由熔点高于约1000℃且低于约1800℃的贱金属组成的合金,至少一种不会与贱金属形成固溶体的合金金属,以及至少一种助剂 与基体金属共晶的金属在真空下在约1000℃至约1800℃的温度下熔化。然后将熔融合金缓慢冷却,以形成固体中的母体金属和辅助金属的细晶粒 共晶体中的溶液,而共晶体是液体,并且在冷却期间从晶体中排出转移气体到液体共晶,以增加高于平衡浓度的液体共晶体中的气体浓度,导致气体从液体共晶体排出,以及 从合金中去除气体。 然后将合金冷却以迅速凝固液体共晶,并将合金金属作为共晶中的细分散体沉淀。

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