MANUFACTURE OF HEAT TREATED ALUMINUM ALLOY WITH SUPERIOR WORKABILITY

Title:

MANUFACTURE OF HEAT TREATED ALUMINUM ALLOY WITH SUPERIOR WORKABILITY

Document Type and Number:

Japanese Patent JPS6013064

Kind Code:

A

Abstract:

PURPOSE: To obtain a heat treated Al alloy with superior cold workability by homogenizing an Al alloy ingot to be heat treated, working the ingot, holding it at the soln. heat treatment temp., and cooling it under specified conditions.

CONSTITUTION: An Al alloy ingot to be heat treated such as an ingot of an Al-Cu, Al-Mg-Si, Al-Zn-Mg or Al-Zn-Mg-Cu alloy is homogenized. The ingot is hot worked and cold worked, and it is heated and held at 400W550°C soln. heat treatment temp. to form a fine recrystallized structure. The ingot is then cooled at ≥30°C/min cooling rate to make precipitated grains fine. When the resulting heat treated Al alloy material is subjected to finish cold working, a formed part free from surface roughness and working crack can be manufactured.

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Inventors:

MIYAMOTO YOSHIMITSU
HIRANO MASAKAZU
KANEDA YUTAKA

Application Number:

JP12143683A

Publication Date:

January 23, 1985

Filing Date:

July 04, 1983

Export Citation:

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Assignee:

KOBE STEEL LTD

International Classes:

C22F1/04; C22F1/00; (IPC1-7): C22F1/04

Domestic Patent References:

JPS5831054A	1983-02-23
JPS5319117A	1978-02-22

Attorney, Agent or Firm:

Maruhisa Yoshihisa

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