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Aluminium alloy forged piece and manufacturing process thereof

A preparation process and aluminum alloy technology, which is applied in the field of aluminum alloy forging processing, can solve the problems of low hardness, low elongation, and low tensile strength, and achieve the effects of improving comprehensive performance, significant social benefits, and considerable economic benefits

Active Publication Date: 2019-04-02
昆山市振达铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problems of low tensile strength, small elongation and low hardness existing in the existing 6061 aluminum alloy forging, provide an aluminum alloy forging and its preparation process, the forging has tensile strength Excellent properties of high tensile strength, high elongation and high hardness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a process for preparing an aluminum alloy forging, including the following steps:

[0028] Ingot heating: select an aluminum alloy ingot and heat the aluminum alloy ingot to 480°C at a heating rate of 12°C / min for 4 hours. The aluminum alloy contains the following components by weight: 0.7wt% copper, 0.15wt% manganese, 1wt% magnesium, 0.6wt% zinc, 0.5wt% titanium, 0.6wt% silicon, 0.5wt% chromium, 0.7wt% iron, the rest is aluminum;

[0029] Extrusion: Heat the extrusion die to 420℃ for 2h, heat the extrusion barrel to 420℃, then put the aluminum alloy ingot into the extrusion barrel, and push the aluminum alloy ingot in the extrusion barrel from the extrusion Extrusion into the die hole of the die at an extrusion speed of 5.5m / min to form an extruded profile;

[0030] Air cooling: the air volume of air cooling is 95m 3 / min;

[0031] Straightening: Straighten the profile when it cools to below 50℃;

[0032] Sawing: sawing the straightened profile into fo...

Embodiment 2

[0041] Ingot heating: select an aluminum alloy ingot and heat the aluminum alloy ingot to 480°C at a heating rate of 12°C / min for 4 hours, then cool the heated aluminum alloy ingot to below 50°C, and then cast The ingot is heated to 420°C, and the holding time is 2h-4h. The aluminum alloy contains the following components by weight: 0.7wt% copper, 0.15wt% manganese, 1wt% magnesium, 0.6wt% zinc, 0.5wt% titanium, 0.6wt % Silicon, 0.5wt% chromium, 0.7wt% iron, and the rest is aluminum;

[0042] Extrusion: Heat the extrusion die to 420℃ for 2h, heat the extrusion barrel to 420℃, then put the aluminum alloy ingot into the extrusion barrel, and push the aluminum alloy ingot in the extrusion barrel from the extrusion Extrusion into the die hole of the die at an extrusion speed of 5.5m / min to form an extruded profile;

[0043] Air cooling: the air volume of air cooling is 95m 3 / min;

[0044] Straightening: Straighten the profile when it cools to below 50℃;

[0045] Sawing: sawing the strai...

Embodiment 3

[0054] This embodiment provides a process for preparing an aluminum alloy forging, including the following steps:

[0055] Ingot heating: select an aluminum alloy ingot and heat the aluminum alloy ingot to 450°C at a heating rate of 10°C / min for 5 hours, then cool the heated aluminum alloy ingot to below 50°C, and then cast The ingot is heated to 400°C and the holding time is 4h. The aluminum alloy contains the following components by weight: 0.55wt% copper, 0.15wt% manganese, 1.2wt% magnesium, 0.5wt% zinc, 0.6wt% titanium, 0.4wt% silicon , 0.6wt% chromium, 0.7wt% iron, the rest is aluminum;

[0056] Extrusion: Heat the extrusion die to 400°C for 3h, heat the extrusion barrel to 400°C, then put the aluminum alloy ingot into the extrusion barrel, and push the aluminum alloy ingot in the extrusion barrel from the extrusion Extrusion into the die hole of the die at an extrusion speed of 5m / min to form an extruded profile;

[0057] Air cooling: the air volume of air cooling is 90m 3 / m...

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Abstract

The invention relates to an aluminium alloy forged piece and a manufacturing process thereof. The manufacturing process for the aluminium alloy forged piece comprises the following steps: heating an aluminium alloy cast ingot and preserving the heat, wherein components of the aluminium alloy cast ingot are the same with those of a 6061 alloy, and the difference is that content of copper, zinc, titanium and chromium is increased; heating an extrusion mould and an extrusion barrel, and extruding the heated cast ingot into a section bar; straightening after the section bar is cooled to a temperature lower than 50 DEG C, and saw-cutting the straightened section bar to form forged blank; heating the forged blank, and preserving the heat; pre-heating a forging mould, and forging the heated forged blank into a mould forged piece semi-finished product; and performing quenching, tempering and ageing treatment on the mould forged piece semi-finished product to obtain the aluminium alloy forged piece. The aluminium alloy forged piece has excellent comprehensive performance, has tensile strength higher than or equal to 360 MPa, has specified non-proportion extension stress higher than or equalto 340 MPa, has elongation higher than or equal to 16%, and has Vickers hardness higher than or equal to 150 HV.

Description

Technical field [0001] The invention relates to an aluminum alloy forging and a preparation process thereof, and belongs to the technical field of aluminum alloy forging processing. Background technique [0002] With the rapid development of my country's aerospace industry, modern defense industry, and transportation industry, the lightweight of important force-bearing parts and structural parts has promoted the call for replacing steel with aluminum. The use and demand of aluminum alloy forgings are increasing. Gradually increase. [0003] 6061 aluminum alloy is a high-quality aluminum alloy product produced by heat treatment and pre-stretching process, but its magnesium and silicon alloy characteristics are many, it has excellent processing performance, excellent welding characteristics, electroplating, good corrosion resistance, and no Deformation, compact material without defects, easy polishing, easy coloring, and excellent oxidation effect. It can be used to produce forgings ...

Claims

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Application Information

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IPC IPC(8): C22F1/047C22C1/02C22C21/08B21C37/00
CPCB21C37/00C22C1/026C22C21/08C22F1/047
Inventor 邹宝明邹玲
Owner 昆山市振达铝业有限公司