Solid Patents (Class 246/464)
  • Patent number: 5704570
    Abstract: A nose type rail member for a crossing member applied to a turnout or wayside switch system on the ground for a train and the like, is made of high carbon steel material containing 0.70 to 0.82 wt. % of carbon. The rail member is constructed by a pair of rail parts, which have a concave at a side of the middle support part. A backing plate is made of the same material as the rail member, or a steel material having a less carbon content than that of the rail member, and is held by a pair of the opposite concaves. A pair of the head portions and the base portions at a side thereof are joined by means of electron beam welding, and the joined rail member is subjected to S.Q. heat processing; whereby at least a wheel tread of the rail member becomes a homogeneous and fine pearlite structure.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: January 6, 1998
    Assignee: Yamato Kogyo Co., Ltd.
    Inventors: Takaaki Irie, Hisashi Takahata