Title:
溶接後熱処理を用いてシーム溶接継手の性能を改善する方法
Document Type and Number:
Japanese Patent JP2010516471
Kind Code:
A
Abstract:
The present invention provides a method for heat-treating seam-welded constructions of hardenable steel and ferrous alloys with reduced weld-zone hardness and improved weld-zone ductility and toughness. This method consists of heating the seam weld rapidly with a secondary heat source to a temperature greater than the martensitic start temperature but not greater than the lower critical temperature, followed by immediately allowing the seam weld to air-cool. The rapid tempering of this invention is particularly suited to the production of high strength hardenable alloy seam-welded pipe and tubing and other structures.
Inventors:
McLink, Edward, Jay.
Cod, Daniel, S.
Cod, Daniel, S.
Application Number:
JP2009546418A
Publication Date:
May 20, 2010
Filing Date:
January 17, 2008
Export Citation:
Assignee:
Cave, Inc.
International Classes:
B23K31/00; B21D7/08; C21D9/08; C21D9/50; B23K9/23
Attorney, Agent or Firm:
Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Hironori Honda
Toshimitsu Ichikawa