Title:
STEEL PIPE, STEEL PIPE FOR BEARING, AND METHOD FOR PRODUCING STEEL PIPE
Document Type and Number:
WIPO Patent Application WO/2020/100603
Kind Code:
A1
Abstract:
A high-carbon steel pipe (1) with which it is possible to shorten the annealing time of a weld (3) is realized. The steel pipe (1) is formed by welding the edges of a steel plate or steel strip (2) containing 0.4-1.5 mass% of C, 0.03 mass% or less of P, and 0.3 mass% or less of Cu. The edges are welded at a welding temperature of 1200-1700°C, and the width of a bond part (4) is 0.2-1.2% with respect to the thickness of the steel plate or steel strip (2).
Inventors:
AKIDUKI MAKOTO (JP)
MIMACHI SHOHEI (JP)
MIMACHI SHOHEI (JP)
Application Number:
PCT/JP2019/042661
Publication Date:
May 22, 2020
Filing Date:
October 30, 2019
Export Citation:
Assignee:
NIPPON STEEL NISSHIN CO LTD (JP)
International Classes:
B21C37/08; B23K13/00; C22C38/00; C22C38/16; C22C38/38; C21D9/08; C21D9/50
Foreign References:
| JP2013234348A | 2013-11-21 | |||
| JPH11197850A | 1999-07-27 | |||
| JPH0368740A | 1991-03-25 | |||
| JP2008208417A | 2008-09-11 | |||
| JP2009197327A | 2009-09-03 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Download PDF: