Variable-temperature forging process for difficult-to-deform light aluminum / magnesium alloy

By controlling the temperature difference between the die and the billet through variable temperature forging, the problems of uneven deformation and cracking of difficult-to-deform aluminum or magnesium alloys are solved, achieving uniform microstructure and high-performance forming of the workpiece, which is applicable to aerospace, defense and military industries and other fields.

CN122076906APending Publication Date: 2026-05-26HARBIN INST OF TECH AT WEIHAI +1
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Patent Information

Application Number
CN202610291616.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-11
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In the plastic processing of difficult-to-deform aluminum or magnesium alloys, existing technologies have not effectively solved the problems of uneven deformation and cracking caused by rapid cooling of the workpiece surface, and the temperature difference between the internal and external surfaces caused by high preheating temperature, which affects the microstructure and mechanical properties of the workpiece.

Method used

By employing a variable-temperature forging process, the initial temperature transfer deformation, isothermal deformation, and final temperature transfer deformation are achieved by controlling the temperature difference between the die and the billet. Combined with aging heat treatment, the microstructure and properties of the workpiece are optimized.

Benefits of technology

It significantly reduces the tendency of workpieces to be damaged and cracked, improves the formability and uniformity of mechanical properties of workpieces, simplifies mold design, extends mold life, and enables the manufacture of complex shapes and thin-walled structures.

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Abstract

The invention provides a variable-temperature forging process for a difficult-to-deform light aluminum / magnesium alloy, which comprises the following steps: determining a recrystallization temperature so as to lock a preheating temperature; heating the difficult-to-deform aluminum alloy or magnesium alloy blank to a preheating temperature; the mold temperature is 50-200 DEG C higher than the blank temperature; implementing an initial temperature transfer deformation process of high temperature of the die and low temperature of the blank on a forging press; the mold temperature is 50-200 DEG C higher than the blank temperature; when forging deformation is carried out to a 1 / 3-2 / 3 stage, plastic deformation of the mold and the blank at the same temperature is carried out; during pressure maintaining, the temperature of the mold is 50-100 DEG C lower than the temperature of the blank; and performing water quenching on the formed forge piece, and performing aging heat treatment. According to the variable-temperature forging process for the difficult-to-deform light aluminum / magnesium alloy, when the aluminum alloy or the magnesium alloy deforms, the tendency of deformation damage is reduced, low-temperature deformation of a workpiece on the premise that the workpiece is not damaged or cracked is guaranteed, the deformation uniformity of the workpiece is improved, and the structure and mechanical properties are optimized.
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