STEEL FOR WIND POWER GEAR WITH IMPROVED PURITY AND RELIABILITY, AND SMELTING METHOD THEREFOR

    公开(公告)号:US20230054329A1

    公开(公告)日:2023-02-23

    申请号:US17792473

    申请日:2021-11-23

    摘要: Provided is steel for a wind power gear with improved purity and reliability. The chemical components thereof comprise, in percentages by mass: 0.15-0.19% of C, ≤0.4% of Si, 0.5-0.7% of Mn, ≤0.012% of P, ≤0.006% of S, 1.5-1.8% of Cr, 0.28-0.35% of Mo, 1.4-1.7% of Ni, and 0.02-0.04% of Al, with the balance being Fe and inevitable impurities. A smelting method therefor comprises adding raw materials to a converter for primary melting, transferring same to a refining furnace for refining, carrying out continuous casting after vacuum degassing, and transferring same to a gas protection furnace for electroslag remelting. According to the present invention, a pure electroslag master batch is obtained by continuous casting, and the purity of the material is further improved by means of an electroslag remelting procedure; and the prepared steel material is used in a wind power gear, such that the flaw detection pass rate is significantly increased, large-particle inclusions in the steel material are significantly reduced, and the inclusions are fine and dispersed.

    Cold crucible structure
    4.
    发明授权

    公开(公告)号:US11125504B2

    公开(公告)日:2021-09-21

    申请号:US16205154

    申请日:2018-11-29

    摘要: A cold crucible structure according to an embodiment of the present invention includes a cold crucible structure according to an embodiment of the present invention includes: a cold crucible unit including hollow top and bottom caps, a plurality of segments connecting the top cap and the bottom cap, slits disposed between the segments, and a reaction area surrounded by the segments; and an induction coil unit disposed to cover the outer side of the cold crucible unit and disposed across the longitudinal directions of the segments and the slits, in which the diameter of the reaction area is defined as a crucible diameter, the crucible diameter is 100 to 300 mm, and a width of each of the slits is defined by d slit ≤ 0.3 × ∅ 50 (mm)(where dslit is the width of each of the slits and Ø is the crucible diameter).

    COLD CRUCIBLE STRUCTURE
    5.
    发明申请

    公开(公告)号:US20200173723A1

    公开(公告)日:2020-06-04

    申请号:US16205154

    申请日:2018-11-29

    IPC分类号: F27B14/06 C22B34/12 C22B9/00

    摘要: A cold crucible structure according to an embodiment of the present invention includes a cold crucible structure according to an embodiment of the present invention includes: a cold crucible unit including hollow top and bottom caps, a plurality of segments connecting the top cap and the bottom cap, slits disposed between the segments, and a reaction area surrounded by the segments; and an induction coil unit disposed to cover the outer side of the cold crucible unit and disposed across the longitudinal directions of the segments and the slits, in which the diameter of the reaction area is defined as a crucible diameter, the crucible diameter is 100 to 300 mm, and gaps of the slits are defined by d slit ≤ 0.3 × ∅ 50 (mm)(where dslit is the gap between the slits and Ø is the crucible diameter).

    Methods and apparatus for processing molten materials

    公开(公告)号:US09789545B2

    公开(公告)日:2017-10-17

    申请号:US13021978

    申请日:2011-02-07

    CPC分类号: B22F9/082 C22B9/00 F27D3/1518

    摘要: Various non-limiting embodiments disclosed herein relate to nozzle assemblies for conveying molten material, the nozzle assemblies comprising a body, which may be formed from a material having a melting temperature greater than the melting temperature of the molten material to be conveyed, and having a molten material passageway extending therethrough. The molten material passageway comprises an interior surface and a protective layer is adjacent at least a portion of the interior surface of the passageway. The protective layer may comprise a material that is essentially non-reactive with the molten material to be conveyed. Further, the nozzle assemblies according to various non-limiting embodiments disclosed herein may be heated, and may be self-inspecting. Methods and apparatus for conveying molten materials and/or atomizing molten materials using the nozzle assemblies disclosed herein are also provided.

    ALLOY MELTING AND REFINING METHOD
    9.
    发明申请
    ALLOY MELTING AND REFINING METHOD 有权
    合金熔炼和精炼方法

    公开(公告)号:US20160376685A1

    公开(公告)日:2016-12-29

    申请号:US14748788

    申请日:2015-06-24

    摘要: A method of melting and refining an alloy comprises vacuum induction melting starting materials to provide a vacuum induction melted alloy. At least a portion of the vacuum induction melted alloy is electroslag remelted to provide an electroslag remelted alloy. At least a portion of the vacuum arc remelted alloy is vacuum arc remelted to provide a singly vacuum arc remelted alloy. At least a portion of the singly vacuum arc remelted alloy is vacuum arc remelted to provide a doubly vacuum arc remelted alloy. In various embodiments, a composition of the vacuum induction melted alloy comprises primarily one of vanadium, chromium, manganese, iron, cobalt, nickel, copper, niobium, molybdenum, technetium, ruthenium, rhodium, palladium, silver, tantalum, tungsten, rhenium, osmium, iridium, platinum, and gold.

    摘要翻译: 熔融和精炼合金的方法包括真空感应熔炼原料以提供真空感应熔融合金。 至少一部分真空感应熔融合金被电渣重熔以提供电渣重熔合金。 真空电弧重熔合金的至少一部分是真空电弧重熔以提供单独的真空电弧重熔合金。 至少一部分真空电弧重熔合金是真空电弧重熔以提供双重真空电弧重熔合金。 在各种实施方案中,真空感应熔融合金的组成主要包括钒,铬,锰,铁,钴,镍,铜,铌,钼,锝,钌,铑,钯,银,钽,钨,铼, 锇,铱,铂和金。