Title:
高強度を有する溶接可能でステンレスの管状構造体の製造システム及びそれから得られた製品
Document Type and Number:
Japanese Patent JP2009530499
Kind Code:
A
Abstract:
A production system weldable and stainless tubular structures with high mechanical strength and related obtained product, particularly for making tubular elements in cold-drawn stainless steel, workable at different thicknesses and shapes, provided with high performances in terms of mechanical characteristics and weldability, for the construction of light and ultralight structural frames destined for a dynamic use. It comprises a creation step of a tip for making the end of the tube smaller, so that it can pass through the drawing equipment and be coupled for drawing, a step of annealing heat treatment for softening the material and making it deformable. The system provides a mechanical test for evaluating the mechanical characteristics of the material and a metallography for viewing the structure of the material and evaluating if it comes within pre-established parameters for the drawing and a chemical preparation of the surfaces, for lubricating the contact surfaces of the tube with the drawing equipment and for avoiding seizures during the drawing. The preceding steps are repeated until the desired thickness. A step of final heat treatment follows, for reforming the structure of the steel and for fixing the desired final characteristics. Finally, a step of straightening is carried out for make the drawn and furnace-treated tube rectilinear, and a step of passivation for inducing a compact oxide patina ensuring its resistance to corrosion. The cutting, control and packaging operations follow.
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Inventors:
Selena Omodeo Sale
Application Number:
JP2009501026A
Publication Date:
August 27, 2009
Filing Date:
March 23, 2007
Export Citation:
Assignee:
GILCOTUBI S.r.l.
International Classes:
C21D8/10; B21C1/00
Domestic Patent References:
| JP2005344190A | 2005-12-15 | |||
| JPH0642571U | 1994-06-07 | |||
| JP3032706U | 1997-01-10 | |||
| JPH07172365A | 1995-07-11 | |||
| JP2004167587A | 2004-06-17 | |||
| JPS62170484A | 1987-07-27 | |||
| JP2004323563A | 2004-11-18 |
Attorney, Agent or Firm:
Samejima Mutsumi
Kyousei Tamura
Kitahara Yasuhiro
Kyousei Tamura
Kitahara Yasuhiro