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Preparation method of aluminum alloy wire for metal 3D printing

A 3D printing, aluminum alloy wire technology, applied in the field of metal manufacturing, can solve the problems of performance limitation, complex production process, high cost, etc., and achieve the effect of ensuring molding accuracy, appearance effect, and high strength

Active Publication Date: 2019-09-24
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum alloy laser additive manufacturing is highly valued in aerospace, automotive and other fields. The 3D printing of 7075 aluminum alloy is realized by laser sintering 7075 aluminum alloy spherical powder forming method. This process is limited by the performance of aluminum alloy powder, and the production process is complex and The cost is high, and the printed aluminum alloy parts still have insufficient structure and mechanical properties. There are small pores inside, and the structure is usually a cast columnar crystal structure, which affects the strength of the part.

Method used

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  • Preparation method of aluminum alloy wire for metal 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Alloy ingredients: prepare 2kg7075 aluminum alloy, and take raw material powder according to the proportion of each component [1] , powder purity ≥ 99.9%, mix each raw material powder evenly.

[0037] (2) Compression molding: Compression molding with a cold isostatic press, put 7075 aluminum alloy powder into a rod-shaped rubber mold sleeve (φ30×100mm), seal it and put it in a cold isostatic press, press pressure 160Mpa, keep the pressure Time 90s.

[0038] (3) Vacuum induction furnace smelting: put the pressed 7075 aluminum alloy into an induction furnace for smelting, and fully stir until it melts clear to obtain an aluminum alloy melt.

[0039] (4) Alloy casting: Preheat the casting mold for standby, pour the smelted 7075 aluminum alloy liquid into the preheated mold to form a 7075 aluminum alloy ingot with a diameter of 30 mm, and perform homogenization annealing on the ingot, the annealing temperature 430°C, holding time 16h.

[0040] (5) Forging: The forgin...

Embodiment 2

[0047] (1) Alloy ingredients: prepare 3kg of 7075 aluminum alloy, take raw material powder according to the proportion of each component, the powder purity is ≥99.9%, and mix each raw material powder evenly.

[0048] (2) Compression molding: Compression molding with a cold isostatic press, put 7075 aluminum alloy powder into a rod-shaped rubber mold sleeve (φ30×100mm), seal it and put it in a cold isostatic press, press pressure 180Mpa, keep the pressure Time 100s.

[0049] (3) Vacuum induction furnace smelting: put the pressed 7075 aluminum alloy into an induction furnace for smelting, and fully stir until it melts clear to obtain an aluminum alloy melt.

[0050] (4) Alloy casting: Preheat the casting mold for standby, pour the smelted 7075 aluminum alloy liquid into the preheated mold to form a 7075 aluminum alloy ingot with a diameter of 40mm, and perform homogenization annealing on the ingot, the annealing temperature 450°C, holding time 18h.

[0051] (5) Forging: The fo...

Embodiment 3

[0058] (1) Alloy ingredients: prepare 4kg7075 aluminum alloy, take the raw material powder according to the proportion of each component, the powder purity is ≥99.9%, and mix the raw material powder evenly.

[0059] (2) Compression molding: Compress molding with a cold isostatic press, put 7075 aluminum alloy powder into a rod-shaped rubber mold sleeve (φ30×100mm), seal it and put it in a cold isostatic press, press at a pressure of 200Mpa, and keep the pressure Time 120s.

[0060] (3) Vacuum induction furnace smelting: put the pressed 7075 aluminum alloy into an induction furnace for smelting, and fully stir until it melts clear to obtain an aluminum alloy melt.

[0061] (4) Alloy casting: Preheat the casting mold for standby, pour the smelted 7075 aluminum alloy liquid into the preheated mold to form a 7075 aluminum alloy ingot with a diameter of φ50mm, and homogenize the ingot for annealing and annealing The temperature is 460°C, and the holding time is 22h.

[0062] (5) ...

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Abstract

The invention relates to a preparation method of an aluminum alloy wire for metal 3D printing. The method particularly aims at a 7075 aluminum alloy wire for metal 3D printing. The preparation method of the wire comprises the steps of alloy dosing, pressing forming, vacuum induction furnace smelting, alloy pouring, forging, rotary forging, wire drawing, continuous electrolytic washing and heat treatment straightening. The surface quality of the aluminum alloy wire obtained by the adoption of the method is improved remarkably, in the 3D printing process, the wire feeding speed is stable, and strength and mobility are good.

Description

technical field [0001] The invention relates to the field of metal manufacturing, in particular to a method for preparing an aluminum alloy wire for metal 3D printing. Background technique [0002] Aluminum alloy is an alloy based on aluminum and added a certain amount of copper, magnesium, zinc, silicon and other trace elements. It has low density, high strength, excellent electrical conductivity and corrosion resistance, and is widely used in aerospace, mechanical ships , automobiles and other fields. Among them, 7075 aluminum alloy, as a cold-processed forged hard aluminum alloy, has good mechanical properties and mechanical properties, and is used in the manufacture of complex structural parts of aircraft and lightweight parts of automobiles. [0003] At present, metal 3D printing technology, as the most cutting-edge and most potential technology in the entire 3D printing system, is an important development direction of advanced manufacturing technology. Aluminum alloy...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C21/10C22F1/02C22F1/053C21D9/52C25F3/20B33Y70/00B21C37/04
CPCC22C1/026C22C21/10C22F1/053C22F1/02C21D9/525C25F3/20B33Y70/00B21C37/047B22F10/25B33Y80/00Y02P10/25
Inventor 王焱辉刘奇李方薄新维王小宇韩晓宇何浩然姚志远
Owner CHONGQING MATERIALS RES INST
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