Method of manufacturing high-strength parts

    公开(公告)号:JP4551300B2

    公开(公告)日:2010-09-22

    申请号:JP2005266232

    申请日:2005-09-14

    摘要: PROBLEM TO BE SOLVED: To provide components excellent in the strength of post-high temperature molding, such as structural and reinforcing members of automobiles, and methods for manufacturing these components. SOLUTION: Steel plates, containing such chemical ingredients as C, amounting to 0.05 to 0.55% in terms of mass percentage, and Mn, accounting for 0.1 to 3%, are heated up to Ac3 to the melting point in an atmosphere in which hydrogen accounts for 10% or less in volume percentage, and its dew point is 30 degrees Celsius or less. Molding is started at a temperature above the level at which ferrite/pearlite/bainite/martensite deformation occurs. After high-strength components are manufactured by implementing the hardening and cooling of the steel plates in the mold, subsequent to molding, some portion of the components are melted and cut; or high-strength components manufactured through the method for producing such components in which hole formation and cutting around components are carried out through machining. COPYRIGHT: (C)2006,JPO&NCIPI