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METHOD FOR PRODUCING A STAINLESS STEEL DIFFUSION-BONDED PRODUCT

  • US 20160114423A1
  • Filed: 05/15/2013
  • Published: 04/28/2016
  • Est. Priority Date: 05/15/2013
  • Status: Active Grant
First Claim
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1. A method for producing a stainless steel diffusion-bonded product, comprising directly contacting stainless steel materials with each other to unify the materials together by diffusion bonding, wherein at least one of the stainless steel materials to be contacted is a dual-phase steel having an austenite transformation starting temperature Ac1 point of 650 to 950°

  • C. during the temperature elevation and having an austenite+ferrite dual-phase temperature region in the range of 880°

    C. or higher, and the diffusion bonding is advanced under conditions such that the contact surface pressure is in the range of 1.0 MPa or less and the heating temperature is in the range of from 880 to 1,080°

    C. while being accompanied by the movement of grain boundary caused when the ferrite phase in the dual-phase steel undergoes transformation to an austenite phase.

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