Invention Grant
US08206518B2 Die for press forming of glass and manufacturing method thereof 失效
玻璃冲压成型用模具及其制造方法

  • Patent Title: Die for press forming of glass and manufacturing method thereof
  • Patent Title (中): 玻璃冲压成型用模具及其制造方法
  • Application No.: US11573501
    Application Date: 2006-05-11
  • Publication No.: US08206518B2
    Publication Date: 2012-06-26
  • Inventor: Jun Masuda
  • Applicant: Jun Masuda
  • Applicant Address: JP Tokyo
  • Assignee: Toshiba Kakai Kabushiki Kaisha
  • Current Assignee: Toshiba Kakai Kabushiki Kaisha
  • Current Assignee Address: JP Tokyo
  • Agency: DLA Piper LLP (US)
  • Priority: JP2005-185052 20050624
  • International Application: PCT/JP2006/309478 WO 20060511
  • International Announcement: WO2006/137225 WO 20061228
  • Main IPC: C21D1/00
  • IPC: C21D1/00 C22C38/18
Die for press forming of glass and manufacturing method thereof
Abstract:
The present invention is directed to provide a method for manufacturing a die for press forming of glass in which cracks are not easily caused in a surface covering layer. A surface covering layer made of an amorphous Ni—P alloy is formed on the surface of a base material made of a steel having a martensitic structure or made of steel in which ε-carbide is dispersed in low carbon martensite matrix. Then, the base material and the surface covering layer are heated to change the base material into a troostitic structure or a sorbitic structure and change the surface covering layer into a eutectic structure of Ni and Ni3P. Preferably, the base material contains 0.3 wt % or more and 2.7 wt % or less of carbon and 13 wt % or less of chromium, and the heat treatment is carried out at 270° C. or more.
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