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    • 6. 发明专利
    • Artificial slag for initial period in continuous casting of steel
    • 钢连续铸造初始阶段人工滑坡
    • JPS5750259A
    • 1982-03-24
    • JP12509780
    • 1980-09-09
    • Nisshin Steel Co Ltd
    • HOSHI NORIOKAWAI YUTAKAMURANAKA YUTAKAYASUZAWA KEIJI
    • B22D11/10B22D11/08B22D11/108B22D11/111C21C7/076
    • B22D11/111
    • PURPOSE:To provide titled slag which decreases hollow defects and defects occuring in slag inclusion which are liable to occur with an ingot of an initial period of continuous casting by adding and compounding a specific ratio of MnO to and with slag of which the basicity is controlled to a prescribed range. CONSTITUTION:New artificial slag for initial period of continuous casting consisting of adding and compounding 1-6wt% MnO to and with slag of which the basicity (CaO/SiO2) is controlled to a 0.8-1.2 range. This artificial slag is initially charged at the start of continuous casting, and after 5-6min of use thereof, it is switched to artificial slag contg. no MnO, and the casting may be continued. As a result, the quality of the ingot in the initial period of the casting is improved up to a level approximately equal to the quality of the ingot in the stable period by the articial slag contg. no MnO. Hence, it is possible to eliminate completely the crop scraps for said part produced heretofore unavoidably owin to the physical factors in the initial period of casting.
    • 目的:提供标称的矿渣,其通过添加并配合特定比例的MnO与其控制碱度的炉渣,从而减少在熔融夹杂物中发生的中空缺陷和缺陷,其易于与初始连续铸造期间的锭发生 达到规定的范围。 构成:连续铸造初期新型人造渣,其添加和配合1-6重量%的MnO与其中碱度(CaO / SiO 2)控制在0.8-1.2范围内的炉渣组成。 该人造渣在连续铸造开始时首先进料,在使用5-6分钟后,切换为人造渣。 没有MnO,并且可以继续铸造。 结果,在铸造初始阶段,铸锭的质量在稳定的时间段内被提高到大约等于锭的质量的水​​平。 没有MnO。 因此,可以完全消除所生产的所述部件的作物废料,这在现在铸造的初始阶段不可避免地与物理因素有关。
    • 9. 发明专利
    • METHOD AND DEVICE FOR CONTINUOUS CASTING OF THIN BILLET
    • JPS6024248A
    • 1985-02-06
    • JP13256483
    • 1983-07-20
    • NISSHIN STEEL CO LTD
    • MURANAKA YUTAKAHOSHI NORIOTAKIMOTO NORIAKI
    • B22D11/06
    • PURPOSE:To prevent generation of uneven billet thickness, lamination and rippled surface with a casting mold formed of stationary walls and moving mold surfaces by coating lubricants having high and low viscosities to the prescribed parts on the moving mold surfaces. CONSTITUTION:Stationary walls 2a, 2b are disposed to face each other on moving mold surfaces 1a, 1b and the space corresponding to the width of a thin billet 3 is provided therebetween. Said surfaces 1a, 1b are formed of a pair of casting rolls or casting belts and are disposed to face each other apart at the space corresponding to the thickness of the billet 3. A lubricant having a high viscosity is coated to the parts of the surfaces 1a, 1b facing the walls 2a, 2b and a lubricant having a low viscosity on the parts facing the molten metal between the walls 2a and 2b. The molten metal is supplied into the continuous casting mold formed of said surfaces 1a, 1b and the walls 2a, 2b to obtain billet 3. The cooling rate in the width direction of the billet 3 is thus made uniform and the generation of uneven billet thickness, lamination and rippled surface is prevented.