Aluminum alloy heat treatment
US4624717A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1984 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Mar 30, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C21/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing sheet or strip from a rolling ingot of an aluminum alloy which contains lithium and constituents selected from the following groups 1 and 2: PA0 Group 1--deliberately added magnesium, copper and zinc; PA0 Group 2--Zirconium manganese, chromium, titanium, iron and nickel; PA0 comprising hot rolling the rolling ingot in one or more stages to produce a hot blank; holding the hot blank at a temperature and for a time which causes substantially all of the lithium and substantially all of any of the Group 1 constituents present to be in solid solution; positively cooling the hot blank; subjecting the cooled blank to a further heat treatment to reprecipitate those age hardening phases in solid solution, continuing the heat treatment to produce a coarse overaged morphology and thereafter cold rolling the blank to form a sheet or strip which at any position therein and in any direction therefrom has properties of elongation that vary from those in the rolling direction by no more than 2.0%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.