Retrogression heat treatment

Details Retrogression heat treatment Retrogression heat treatment

2011-08-16

2011-08-16

Banks, Derris H (Department: 3729)

Metal working

Method of mechanical manufacture

Assembling or joining

C029S525150, C029S428000, C029S809000

Reexamination Certificate

active

07996978

ABSTRACT:
A method for producing a product includes the steps of taking heated and cooled extrusion, preferably aluminum, and reheating a selected area of the extrusion. There is the step of requenching the extrusion. There is the step of forming the reheated area into a desired shape. A method for producing a ladder.

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patent: 5911844 (1999-06-01), Benedyk
patent: 7028404 (2006-04-01), Poirier et al.
patent: 2003/0188923 (2003-10-01), Moss
Wang Zhutang, Lu Zaihao Wang Honghua, “Advance of Retrogression Heat Treatment and the New Field of Application,” China Academic Journal Electronic Publishing House, vol. 26 (No. 11), (Jan. 8, 1998).

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