Title:
CLAD STEEL SHEET AND ITS MANUFACTURING METHOD AS WELL AS WELDED STRUCTURE
Document Type and Number:
Japanese Patent JP2023039270
Kind Code:
A
Abstract:
To provide a clad steel sheet having an excellent fracture toughness value of a joined surface and its manufacturing method.SOLUTION: There is provided a clad steel sheet excellent in fracture toughness value of a joined surface, the clad steel sheet having a width of a region having a nano-hardness of 7 GPa or more of 5 μm or less and a CTOD value of the clad interface of 0.15 mm or more, in an interface between a cladding material and a base material of the clad steel sheet where the cladding material is stainless steel or Ni-based alloy and the base material is carbon steel or low-alloy steel. Since a martensite region with low toughness is small on the joined surface of the clad steel sheet, interfacial separation can be prevented even if a weld defect occurs at the interface during welding.SELECTED DRAWING: Figure 3
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Inventors:
KAWA MACHI
OIKAWA YUSUKE
KAYAMORI YOICHI
OIKAWA YUSUKE
KAYAMORI YOICHI
Application Number:
JP2021146356A
Publication Date:
March 20, 2023
Filing Date:
September 08, 2021
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP
International Classes:
B23K20/04; C22C38/00; C21D8/02; C21D9/46; C22C38/60
Attorney, Agent or Firm:
Patent Attorney Corporation Kinoshita Intellectual Property Office