Title:
ELECTRIC RESISTANCE WELDED PIPE AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/181523
Kind Code:
A1
Abstract:
The present invention provides an electric resistance welded pipe having, in order to increase a fit property of an inner pipe and an outer pipe when the electric resistance welded pipe is used as the outer pipe, a reduced protruding height of cutting marks on an inner surface side of the outer pipe achieved by weld bead cutting on the inner surface side only once and superior toughness of the welded portion. The electric resistance welded pipe has the welded portion along the longitudinal direction of this pipe, the maximum value of a thickness distribution of the welded portion is not more than 1.05 times of an average thickness of the electric resistance welded pipe, the width of the welded metal in the circumferential direction in the welded portion is 1 μm-800 μm inclusive over the entire thickness of the electric resistance welded pipe, and a ratio (maximum value/minimum value) of the maximum value to the minimum value of the width of the welded metal is 1.0-2.5 inclusive.
Inventors:
MATSUMOTO ATSUSHI (JP)
NAKAZAWA RYO (JP)
OKABE TAKATOSHI (JP)
KATSUMURA TATSURO (JP)
NAKAZAWA RYO (JP)
OKABE TAKATOSHI (JP)
KATSUMURA TATSURO (JP)
Application Number:
PCT/JP2022/045571
Publication Date:
September 28, 2023
Filing Date:
December 09, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K13/00; B21C37/08; C22C38/00; C22C38/14; C22C38/58
Domestic Patent References:
| WO2018047723A1 | 2018-03-15 |
Foreign References:
| JPH0368740A | 1991-03-25 | |||
| JPH07284842A | 1995-10-31 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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