The invention relates to a large-ratio and large-torque planet carrier steel casting material used for a self-elevating offshore platform lifting gear box and a production method. The material comprises the following chemical components in mass by percentage: 0.28 to 0.35 percent of C, 0.20 to 0.35 percent of Si, 0.65 to 0.85 percent of Mn, less than or equal to 0.030 percent of S, less than or equal to 0.030 percent of P, 0.85 to 0.95 percent of Cr, 0.20 to 0.26 percent of Mo, 0.04 to 0.08 percent of V, and 0.02 to 0.06 percent of Ti; and the remaining content is Fe. The planet carrier steel casting material has the advantages that the working procedures are simplified, connection areas between a pin, an upper flange and a lower flange are subject to smooth transition by circular angles, so that the anti damage capacity and the working stability are enhanced; the traditional casting process of 'progressive solidification' by using the casting structure is changed, external chill is arranged at a specific area to change the earliest solidification area, the solidification feeding of the casting can be changed by changing a feeding channel chain, the connection areas between the pin, the upper flange and the lower flange are tightly, the stress of shrinkage solidification is greatly reduced, and cracks are avoided.


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    Titel :

    Planet carrier casting material used for self-elevating offshore platform lifting gear box and production method


    Beteiligte:
    CHEN JIANGZHONG (Autor:in) / LOU BIAO (Autor:in)

    Erscheinungsdatum :

    01.04.2015


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F16H Getriebe , GEARING / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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