AN ULTRA-THIN FLEXIBLE TUBE MADE OF AN ALLOY AND THE MANUFACTURE PROCESS THEREOF

Title:

AN ULTRA-THIN FLEXIBLE TUBE MADE OF AN ALLOY AND THE MANUFACTURE PROCESS THEREOF

Document Type and Number:

WIPO Patent Application WO/2008/151479

Kind Code:

A1

Abstract:

An ultra-thin flexible tube made of an alloy comprises (in wt%): Cr 17~23, Ti 0.1~0.35, Cu 0.4~8.5, Mo 0.2~2.4, Co 0.01~0.06, Ni 0.3~2.0, Nb 0.2~1.0, V 0.05~0.4, B 0.001~0.020, Si <1.0, Mn <1.0, C <0.020, N <0.020, P <0.035, S <0.025, Mg < 0.005, O <0.006, Al <0.08, and remaining Fe and inevitable impurities. The manufacture process of the tube comprises the following steps: cold-rolling sheet, quenching and tempering, flattening, slivering precisely, preparing coil, cleaning, positioning, coiling and shaping, welding, keeping warm, detecting defect and marking, rectifying circularity and determining diameter, and coiling. The tube has a thickness of 0.04-0.2mm, a corrosion resistance to chlorion of more than 100ppm which is more than 50% higher than the corrosion resistance of Cu material, a strength about 1 time higher than that of Cu material, a ductility similar to that of Cu material, and a thermal power higher than that of conventional Cu tubes. The tube could be used as a high-efficiency radiating tube in various air conditioners or refrigerating apparatus.

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Inventors:

CHEN WEIDONG (CN)

Application Number:

PCT/CN2007/002775

Publication Date:

December 18, 2008

Filing Date:

September 20, 2007

Export Citation:

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Assignee:

CHEN WEIDONG (CN)

International Classes:

B21B1/40; C22C38/54; B21D53/06; C21D9/46

Foreign References:

JP2002080943A	2002-03-22
JPS5011917A	1975-02-06
JPH02145752A	1990-06-05
JP2006016637A	2006-01-19
CN1836056A	2006-09-20
JPH0219447A	1990-01-23

Other References: