PRODUCTION OF DRAWN TUBE EXCELLENT IN CORROSION RESISTANCE

Japanese Patent JP3628434

B2

PROBLEM TO BE SOLVED: To inexpensively produce a drawn tube excellent in the corrosion resistance of the inside face.
SOLUTION: This method for producing a tube is the one in which the inside face of a cylindrical aluminum alloy billet is thermally sprayed with Zn or a Zn alloy, then this billet is subjected to hot extrusion, and next this extruded tube is subjected to drawing. The cylindrical aluminum alloy billet thermally sprayed with the Zn or Zn alloy is subjected to heat treatment at 350 to 500°C for 1 to 48hr. Since a diffused layer is formmed between ther thermally sprayed layer and the core material, the thermally sprayed layer is hard to peel at the time of the drawing, and the tube excellent in the corrosion resistance of the inside face can be obtd. Furthermore, the tube can inexpensively be produced without requiring rolling equipment and cylindrical lining materials.

WO/2015/015767	ALUMINUM-ALLOY CLAD MEMBER, METHOD FOR PRODUCING SAME, AND HEAT EXCHANGER USING ALUMINUM-ALLOY CLAD MEMBER
JP2010163638	BRAZING SHEET FOR HEAT EXCHANGER, AND HEAT EXCHANGER

Takenori Tsuchiko
Akinori Yoshida
Atsumi Takasugi
Hiroshi Yanagawa
Akio Niikura

JP11364596A

March 09, 2005

May 08, 1996

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Furukawa Sky Co., Ltd.

F28F19/06; C23C4/06; C23C4/18; (IPC1-7): C23C4/06; C23C4/18; F28F19/06

JP58051772A
JP58000316A
JP5320798A
JP57062398A
JP4015496A
JP7157861A

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