High-strength aluminum alloy isothermal direction-change open die forging method and device

An aluminum alloy and isothermal forging technology, which is applied in the field of high-strength aluminum alloy isothermal free forging and devices, and achieves the effects of good microstructure, uniform billet temperature and convenient operation.

Active Publication Date: 2011-01-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the existing high-strength aluminum alloy forging forming process, and provide a high-strength aluminum alloy iso...

Method used

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  • High-strength aluminum alloy isothermal direction-change open die forging method and device
  • High-strength aluminum alloy isothermal direction-change open die forging method and device
  • High-strength aluminum alloy isothermal direction-change open die forging method and device

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Experimental program
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Effect test

Embodiment 1

[0035] High-strength aluminum alloy isothermal direction change free forging method:

[0036] The first step: cut the head and tail of the alloy billet with a diameter of 80mm and the grade of 7085, and then use a lathe to flatten the two ends of the alloy billet, and make the two end faces of the alloy billet after the flattening be aligned with the alloy billet The axes are perpendicular to each other to ensure that the pressure direction is parallel to the axis of the alloy billet during upsetting, so as to avoid bending during upsetting, and obtain an alloy billet with a diameter of 70 mm and a length of 110 mm; put the processed billet into a resistance heating furnace Heating to 450°C in medium temperature, holding the temperature for one hour and keeping the furnace temperature constant;

[0037] Step 2: Start the press, upsetting the billet to a height of 60 mm and then elongating it to the original height; repeatedly upsetting and elongating; finally, forging and form...

Embodiment 2

[0049] High-strength aluminum alloy isothermal direction change free forging method:

[0050] The first step: cut the head and tail of the alloy billet with a diameter of 80mm and the grade of 7085, and then use a lathe to flatten the two ends of the alloy billet, and make the two end faces of the alloy billet after the flattening be aligned with the alloy billet The axes are perpendicular to each other to ensure that the pressure direction is parallel to the axis of the alloy billet during upsetting, so as to avoid bending during upsetting, and obtain an alloy billet with a diameter of 70 mm and a length of 110 mm; put the processed billet into a resistance heating furnace Heating to 420°C in medium temperature, holding the temperature for one hour and keeping the furnace temperature constant;

[0051] Step 2: Start the press, upsetting the billet to a height of 40 mm and then elongating it to the original height; repeatedly upsetting and elongating; finally, forging to obtai...

Embodiment 3

[0054] High-strength aluminum alloy isothermal direction change free forging method:

[0055] The first step: cut the head and tail of the alloy billet with a diameter of 80mm and the grade of 7085, and then use a lathe to flatten the two ends of the alloy billet, and make the two end faces of the alloy billet after the flattening be aligned with the alloy billet The axes are perpendicular to each other to ensure that the pressure direction is parallel to the axis of the alloy billet during upsetting, so as to avoid bending during upsetting, and obtain an alloy billet with a diameter of 70 mm and a length of 110 mm; put the processed billet into a resistance heating furnace Heating to 380°C in medium temperature, holding the temperature for one hour and keeping the furnace temperature constant;

[0056] Step 2: Start the press, upsetting the billet to a height of 40 mm and then elongating it to the original height; repeatedly upsetting and elongating; finally, forging to obtai...

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Abstract

The invention relates to a high-strength aluminum alloy isothermal direction-change open die forging method which comprises the following steps: heating preprocessed high-strength aluminum alloy blank in a direction-change isothermal forging heating holding furnace at the temperature of 350-450 DEG C, and keeping the furnace temperature unchanged; and according to the structure property indices required by the blank, repeatedly upsetting and drawing the blank in the direction-change isothermal forging heating holding furnace until the blank reaches the design size of the forge piece. The isothermal direction-change open die forging device comprises a heating furnace and a forging press, wherein the furnace body is installed on the forging platform of the forging press; the forging rammer of the forging press is installed in a through hole in the furnace bottom plate; and the forging head of the forging press is installed in a through hole in the furnace top plate. The invention has the advantages of simple technique, convenient operation, and low tendency to recrystallization, enables the high-strength aluminum alloy to be under isothermal conditions all through the direction-change open die forging process, does not need to heat the blank again in the forging process, improves the quality of the forge piece and enhances the forging efficiency; and the forge piece has the advantages of sufficient structure deformation, uniform deformation at each part, and low tendency of cracking. The forge piece has favorable structure properties, and is suitable for industrial production.

Description

technical field [0001] The invention discloses a high-strength aluminum alloy isothermal direction-changing free forging method and device, and belongs to the technical field of metallurgical forging techniques. Background technique [0002] Due to the advantages of low density, high specific strength and specific stiffness, high-strength aluminum alloys have been widely used in various industrial sectors. High-strength aluminum alloy forgings have become indispensable mechanical parts in various industrial sectors, but their quality depends largely on the forging process s Choice. When the unidirectional deformation of the billet is small, the refinement of the grain and the second phase is insufficient, which affects the performance improvement of the forging, but when the unidirectional deformation is too large, severe tearing is likely to occur inside and on the surface of the billet and the forging billet is scrapped. In order to increase the total deformation to ensur...

Claims

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Application Information

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IPC IPC(8): B21J3/00B21J1/06B21J17/00
Inventor 陈康华梁信陈送义彭迪陈学海
Owner CENT SOUTH UNIV
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