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Forging and heat treatment process of free forge piece

A free forging technology, applied in the forging field of free forgings, can solve the problems of high strength and toughness, high strength and low density, unable to meet the requirements of high strength, corrosion resistance and light weight of aluminum alloy materials, etc., to improve the tensile strength, Strength-enhancing effect

Active Publication Date: 2019-11-08
江苏裕隆特种金属材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Existing traditional high-strength and high-toughness aluminum alloys, such as Al-Zn-Mg-Cu series 7050 alloys, have high strength and toughness but are not corrosion-resistant; medium-strength weldable aluminum alloys, such as Al-Zn-Mg series 7005 and 7020 alloys, are both It cannot solve the problem of high strength and low density at the same time, and cannot meet the requirements of high strength, corrosion resistance and light weight of aluminum alloy materials in some special fields

Method used

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  • Forging and heat treatment process of free forge piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]A forging and heat treatment process for free forgings, comprising the steps of:

[0030] Step S1, weighing the following raw materials by weight: Cr: 0.5%, Mg: 5.0%, Zn: 0.05%, Ti: 0.03%, Cu: 1.5%, Fe: 0.10%, slag remover: 3.5%, and the balance is Al;

[0031] Step S2: Add aluminum into the melting furnace and heat up to 700°C to melt, then heat up to 1200°C, add copper and magnesium after melting, smelt at this temperature for 30 minutes, add zinc, titanium, chromium and iron, and adjust the temperature to 1150°C , stir evenly, add slag cleaning agent after all melted, and refine for 45 minutes to obtain aluminum alloy liquid;

[0032] Step S3, heat the aluminum alloy liquid for 30 minutes after removing the slag, and then carry out casting. Control the casting temperature to 700°C, control the casting speed to 50mm / min, and the water pressure to 0.05MPa to obtain a casting, and heat the casting at 250°C for 20 hours. Carry out annealing treatment, free forging is ca...

Embodiment 2

[0040] A forging and heat treatment process for free forgings, comprising the steps of:

[0041] Step S1, weighing the following raw materials by weight: Cr: 0.6%, Mg: 5.5%, Zn: 0.08%, Ti: 0.04%, Cu: 1.6%, Fe: 0.12%, slag remover: 4.0%, and the balance is Al;

[0042] Step S2: Add aluminum into the melting furnace and heat up to 700°C to melt, then heat up to 1200°C, add copper and magnesium after melting, smelt at this temperature for 30 minutes, add zinc, titanium, chromium and iron, and adjust the temperature to 1150°C , stir evenly, add slag cleaning agent after all melted, and refine for 45 minutes to obtain aluminum alloy liquid;

[0043] Step S3, heat the aluminum alloy liquid for 30 minutes after removing the slag, and then carry out casting. Control the casting temperature to 700°C, control the casting speed to 50mm / min, and the water pressure to 0.05MPa to obtain a casting, and heat the casting at 250°C for 20 hours. Carry out annealing treatment, free forging is c...

Embodiment 3

[0047] A forging and heat treatment process for free forgings, comprising the steps of:

[0048] Step S1, weighing the following raw materials by weight: Cr: 0.8%, Mg: 7.0%, Zn: 0.08%, Ti: 0.04%, Cu: 1.8%, Fe: 0.14%, slag cleaning agent: 4.5%, and the balance is Al;

[0049] Step S2: Add aluminum into the melting furnace and heat up to 700°C to melt, then heat up to 1200°C, add copper and magnesium after melting, smelt at this temperature for 30 minutes, add zinc, titanium, chromium and iron, and adjust the temperature to 1150°C , stir evenly, add slag cleaning agent after all melted, and refine for 45 minutes to obtain aluminum alloy liquid;

[0050] Step S3, heat the aluminum alloy liquid for 30 minutes after removing the slag, and then carry out casting. Control the casting temperature to 700°C, control the casting speed to 50mm / min, and the water pressure to 0.05MPa to obtain a casting, and heat the casting at 250°C for 20 hours. Carry out annealing treatment, free forgi...

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Abstract

The invention discloses a forging and heat treatment process of a free forge piece. The forging and heat treatment process comprises the following raw materials including, by weight percent, 0.5%-1.0%of Cr, 5.0%-7.5% of Mg, 0.05%-0.10% of Zn, 0.03%-0.05% of Ti, 1.5%-2.0% of Cu, 0.10%-0.15% of Fe, 3.5%-5.0% of a slag removal agent, and the balance Al. The slag remover can remove hydrogen and floating oxidation slag inclusion in the aluminum alloy liquid, so that the alloy liquid is purer, the strong adsorption performance of the alloy liquid is used for adsorbing the slag inclusion, the purityof the aluminum alloy is improved, the added sodium hexafluoroaluminate chemical structure is similar to alumina, and can be mutually dissolved at high temperature, and on the other hand, the surfacetension during making contact with an aluminum melt can be improved, and then aluminum oxide in the aluminum alloy liquid is removed, the metal on the interface between the aluminum oxide and the aluminum can be corroded by adding the sodium fluoride, so that the oxide film falls off and falls into the flux, and then the aluminum alloy is purified.

Description

technical field [0001] The invention relates to a forging method of a free forging, in particular to a forging and heat treatment process of a free forging. Background technique [0002] Existing traditional high-strength and high-toughness aluminum alloys, such as Al-Zn-Mg-Cu series 7050 alloys, have high strength and toughness but are not corrosion-resistant; medium-strength weldable aluminum alloys, such as Al-Zn-Mg series 7005 and 7020 alloys, are both It cannot solve the problem of high strength and low density at the same time, and cannot meet the requirements of high strength, corrosion resistance and light weight of aluminum alloy materials in some special fields. [0003] Chinese invention patent CN200510009996A discloses a manufacturing method of marine aluminum alloy forgings; it includes the following steps: a. melting the alloy ingot at 700-750 ° C, and filtering after standing for 30 minutes; b. filtering the filtered metal liquid at 715 Casting between -730°C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C1/02C22C1/06C22F1/047B21J5/06
CPCB21J5/06C22C1/026C22C1/06C22C21/06C22F1/002C22F1/047
Inventor 张永伟侯虎文
Owner 江苏裕隆特种金属材料科技有限公司
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