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Title:
内外二重筒体の製造方法
Document Type and Number:
Japanese Patent JP4856860
Kind Code:
B2
Abstract:

To easily manufacture an internal/external double tubular body which has high heat resistance and does not cause fine wrinkles, crack or buckling on the surface, by reversing work, regarding the manufacturing method of the internal/external double tubular body to be used on a reformer for fuel cells, for example, or the like.

The internal/external double tubular body is manufactured by performing butt welding of a metallic tubular body 2 having workability better than that of a metallic tubular body 1 having oxidation resistance at a high temperature on one end of the metallic tubular body 1 and reversing the metallic tubular body 2 having good workability successively from the side of the free end to the side of the inside surface or the outside surface of the metallic tubular body 1 having the oxidation resistance at a high temperature. As the metallic tubular body 1 having the oxidation resistance at the high temperature, for example, stainless steel whose heat-resistant temperature is ≥ 900°C is used and as the metallic tubular body 2 having good workability, for example, stainless steel whose elongation percentage is ≥ 45% is used.

COPYRIGHT: (C)2006,JPO&NCIPI


Inventors:
Unno Hisa
Nobuhisa Kojima
Satoshi Kengoya
Application Number:
JP2004209447A
Publication Date:
January 18, 2012
Filing Date:
July 16, 2004
Export Citation:
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Assignee:
Sankei Giken Co., Ltd.
International Classes:
B21D51/18; B21D19/12; H01M8/06
Domestic Patent References:
JP9224850A
JP52052163A
JP63073923A
JP2004025215A
JP2866002B2
Attorney, Agent or Firm:
Ryuji Takahashi
Shigeyuki Motoi



 
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