Title:
METHOD FOR PRODUCING CIRCUMFERENTIAL WELD JOINT FOR LOW-CARBON MARTENSITE STAINLESS STEEL TUBING
Document Type and Number:
WIPO Patent Application WO/2016/088364
Kind Code:
A1
Abstract:
Provided is a method for producing a circumferential weld joint having weld metals exhibiting high-strength, high-toughness and high corrosion resistance, and with which, when performing circumferential welding of low-carbon martensite stainless steel tubing for transporting oil and natural gas, it is possible to efficiently perform the welding using inexpensive similar composition metal weld materials. After abutting the tube ends of low-carbon martensite stainless steel tubes having a predetermined composition, and performing multilayer arc welding using a weld material having a predetermined composition, the first pass of multilayer arc welding involves performing CMT welding which continuously generates an arc while moving the welding material in and out of a molten pool, and in second and subsequent passes performing one type of welding selected from among GMA welding, GTA welding and CMT welding.
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Inventors:
SUZUKI TAKESHI (JP)
MIYATA YUKIO (JP)
OTA HIROKI (JP)
IDE SHINSUKE (JP)
MIYATA YUKIO (JP)
OTA HIROKI (JP)
IDE SHINSUKE (JP)
Application Number:
PCT/JP2015/005970
Publication Date:
June 09, 2016
Filing Date:
December 01, 2015
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K9/23; B23K31/00; B23K35/30; C22C38/00; C22C38/40; C22C38/58
Foreign References:
| JP2001246494A | 2001-09-11 | |||
| JP2002137058A | 2002-05-14 | |||
| JP2000158183A | 2000-06-13 | |||
| JP2014163587A | 2014-09-08 | |||
| JP2008542027A | 2008-11-27 |
Other References:
See also references of EP 3228413A4
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
Akira Kumasaka (JP)
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