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    METHOD FOR PRODUCING HARMONIC DRIVE GEAR BASE MATERIAL
    1.
    发明公开
    METHOD FOR PRODUCING HARMONIC DRIVE GEAR BASE MATERIAL 有权

    公开(公告)号：EP2554686A4

    公开(公告)日：2017-10-18

    申请号：EP11762555

    申请日：2011-03-14

    申请人： AISIN SEIKI

    发明人： NAGATA EIRI ,  KURITA NOBUAKI

    IPC分类号： C21D9/32 ,  C21D1/06 ,  C21D1/20 ,  C21D1/22 ,  C22C38/00 ,  F16H55/06

    CPC分类号： C21D1/32 ,  C21D1/20 ,  C21D1/22 ,  C21D9/32 ,  C21D2211/002 ,  C22C38/00 ,  C22C38/22 ,  F16H2049/003

    摘要： Provided is a method for manufacturing a base material for a wave gear which enables the effective suppression of man-hours and manufacturing cost while providing the required strength and elastic deformation characteristics for an external gear of a wave gear. In this manufacturing method, steel having a carbon content of 0.48% or less is subjected to primary molding by being cold worked into the shape of an external gear for a wave gear. The resulting primary molded article is heated to a temperature range (T 1 ) in which the main phase of the metallographic structure thereof forms an austenitic structure. The main phase of the metallographic structure is formed into bainite by carrying out quenching to a predetermined temperature (T 3 ) higher than the martensitic transformation starting temperature and maintaining the temperature for a predetermined time. The product is then cooled to normal temperature.