CN103014456B - Processing method of corrosion-resisting aluminum alloy foaming die cast - Google Patents

Processing method of corrosion-resisting aluminum alloy foaming die cast Download PDF

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Publication number
CN103014456B
CN103014456B CN201210503579.4A CN201210503579A CN103014456B CN 103014456 B CN103014456 B CN 103014456B CN 201210503579 A CN201210503579 A CN 201210503579A CN 103014456 B CN103014456 B CN 103014456B
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aluminium
hour
corrosion
aluminum alloy
good
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CN201210503579.4A
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CN103014456A (en
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朱余宏
张见华
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CHUZHOU CHENRUN INDUSTRY TRADE Co Ltd
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CHUZHOU CHENRUN INDUSTRY TRADE Co Ltd
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Abstract

The invention discloses a processing method of an corrosion-resisting aluminum alloy foaming die cast. The processing method comprises the five steps of compounding, smelting, pouring, thermal treatment, and extrusion forming. According to the invention, an appropriate amount of rare earth elements La, Er and Gd are added to the aluminum alloy, and effective microalloying action can occur between the rare earth elements and the alloy, thus improving the stress-corrosion-resisting property and the strength property of the alloy. The processed aluminum alloy refrigerator foaming mold die cast has the advantages of good mechanical properties, high strength, good usability, good internal structure compactness, no pore and peeling defects, good wear resistance, good corrosion resistance and oxidation resistance, small expansion coefficient and the like.

Description

The complete processing of anticorrosion aluminium foaming mould foundry goods
Technical field
The complete processing that the present invention relates to a kind of anticorrosion aluminium foaming mould foundry goods, belongs to aluminum alloy materials processing technique field.
Background technology
?an important mould of the manufacture that refrigerator foaming mould is produced as refrigerator, the quality of its processing and manufacturing, will be directly connected to the quality of whole product, even can affect the success or failure that whole product is manufactured.The material that can be used as at present refrigerator foaming mould has metal and nonmetal two classes, and the foaming mould that adopts metal to manufacture can apply in enormous quantities and high-speed production undoubtedly, and foaming mould metallic substance has aluminium, copper, low melting point alloy, nickel, iron, zinc alloy etc.The foaming mould that wherein aluminium alloy is manufactured is most widely used general, and it has good heat conductivity, easily regulates die temperature, be difficult for getting rusty and being corroded, easily maintenance, keeping, cheap, manufacture the advantages such as time period.But aluminium alloy foaming mould also exists the shortcomings such as matter is soft, intensity is low, dense internal organization is poor, therefore, be badly in need of a kind of high performance aluminium alloy refrigerator foaming mould of research and development.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of complete processing of anticorrosion aluminium foaming mould foundry goods is provided, improve the over-all properties of aluminium alloy refrigerator foaming mould.
The technical solution used in the present invention is as follows:
(1) batching
Meet following requirement according to element mass percent: Si≤0.15%, Fe≤0.25%, Cu 2.4-2.8%, Mn≤0.2%, Mg 1.8-2.5%, Cr≤0.05%, Zn 5.5-6.5%, Ti≤0.06%, Zr 0.08-0.15%, La 0.04-0.06%, Er 0.05-0.08%, Gd 0.02-0.04%, other impurity elements add up to≤0.15%, all the other are Al, prepare burden;
(2) melting
Batching is dropped into successively and in smelting furnace, carries out melting, in stove, be controlled at 695-760 ℃, feed intake after 40-60min, there is aluminium water in stove time, add insulating covering agent to cover, start stir, after adjusting component, add refining agent through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature leaves standstill and keeps 20-30min under 710-740 ℃ of condition, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
(3) casting
Aluminium liquid enters crystallizer by the relief hole of smelting furnace through aluminium groove, casts out needed foundry goods, and casting temp is controlled at 690-725 ℃, casting speed control 32-45mm/min, and cooling water flow is controlled at 950-1150 l/min;
(4) thermal treatment
Foundry goods is carried out after surface treatment, carry out homogenizing annealing processing, detailed process is as follows: be first warming up at 305-320 ℃, insulation 2-3h, a 70-90 per hour ℃ intensification is heated to be incubated 6-8h at 530-560 ℃, then air cooling, then a 60-80 per hour ℃ intensification is heated to 350-370 ℃, and degree of insulation 5-6h; Be cooled at 160-180 ℃ again and be incubated 3-4h, air cooling is to room temperature.
Described insulating covering agent is the mixture of the silicon-dioxide of 60-70% and the perlite of 30-40% composition; Described refining agent is made by following raw materials in part by weight: sodium-chlor 5-8, Calcium Fluoride (Fluorspan) 3-5, salt of wormwood 3-5, Graphite Powder 99 5-8, Sodium Silicofluoride 8-10, magnesium oxide 5-8, sepiolite 8-10, trees ash 5-8, NaBF 48-10, NaF 5-8;
Described refining agent preparation method is as follows:
A, by 10-15% salt acid soak 3-4 hour for the sepiolite of above-mentioned weight part, deionized water wash, then soak 3-4 hour with 10-12% sodium hydroxide solution, then with deionized water wash to neutral, then at 500-530 ℃, calcine 2-3 hour, be ground into nanometer powder;
B, by after the each heating raw materials melting beyond sepiolite, clarification 1-2 hour, is poured into water cold quenching by clear liquor above, obtains broken particle;
C, the mixing of materials that step a, b are obtained stir and obtain described refining agent.
Beneficial effect of the present invention:
In aluminium alloy of the present invention, add appropriate rare-earth elements La, Er, Gd, can effective Microalloying Effect occur with alloy, thereby put forward heavy alloyed anti-stress corrosion performance and strength property.The aluminium alloy refrigerator foaming mould cast that the present invention processes has good mechanical property, intensity high, and workability is good, and dense internal organization is good, there is not pore and peeling defect, wear resistance is good, corrosion resistance, good in oxidation resistance, the advantage such as the coefficient of expansion is little.
Embodiment
(1) batching
Meet following requirement according to element mass percent: Si≤0.15%, Fe≤0.25%, Cu 2.4-2.8%, Mn≤0.2%, Mg 1.8-2.5%, Cr≤0.05%, Zn 5.5-6.5%, Ti≤0.06%, Zr 0.08-0.15%, La 0.04-0.06%, Er 0.05-0.08%, Gd 0.02-0.04%, other impurity elements add up to≤0.15%, all the other are Al, prepare burden;
(2) melting
Batching is dropped into successively and in smelting furnace, carries out melting, in stove, be controlled at 725 ℃, feed intake after 50min, there is aluminium water in stove time, add insulating covering agent to cover, start stir, after adjusting component, add refining agent through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature leaves standstill and keeps 30min under 730 ℃ of conditions, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
(3) casting
Aluminium liquid enters crystallizer by the relief hole of smelting furnace through aluminium groove, casts out needed foundry goods, and casting temp is controlled at 710 ℃, casting speed control 35mm/min, and cooling water flow is controlled at 1050 l/min;
(4) thermal treatment
Foundry goods is carried out, after surface treatment, carrying out homogenizing annealing processing, and detailed process is as follows: be first warming up at 315 ℃, insulation 3h, 85 ℃ of intensifications per hour are heated to be incubated 7h at 540 ℃, then air cooling, 70 ℃ of intensifications per hour are heated to 360 ℃ again, and degree of insulation 5h; Be cooled at 170 ℃ again and be incubated 4h, air cooling is to room temperature.
The mixture of the silicon-dioxide that wherein, described insulating covering agent is 70% and 30% perlite composition; Described refining agent is made by following raw materials in part by weight: 7 parts, sodium-chlor, 4 parts, Calcium Fluoride (Fluorspan), 4 parts, salt of wormwood, 6 parts of Graphite Powder 99s, 9 parts of Sodium Silicofluorides, 6 parts, magnesium oxide, 9 parts of sepiolites, trees ash 8 parts, NaBF 48 parts of 9 parts, NaF;
Described refining agent preparation method is as follows:
A, by 12% salt acid soak 4 hours for the sepiolite of above-mentioned weight part, deionized water wash, then soak 4 hours with 10% sodium hydroxide solution, then with deionized water wash to neutral, then at 510 ℃, calcine 3 hours, be ground into nanometer powder;
B, by after the each heating raw materials melting beyond sepiolite, clarify-2 hours, clear liquor is above poured into water to cold quenching, obtain broken particle;
C, the mixing of materials that step a, b are obtained stir and obtain described refining agent.
Through check, product chemical composition is: Si 0.112%, Fe 0.176%, Cu 2.645%, Mn 0.143%, Mg 2.412%, Cr 0.028%, Zn 6.257%, Ti 0.049%, Zr 0.092%, La 0.054%, Er 0.067%, Gd 0.033%, and other impurity elements add up to 0.131%, all the other are Al; Mechanical property is: tensile strength 487Mpa, 0.2% yield strength 431Mpa, elongation 12%, Young's modulus 68Gpa.

Claims (1)

1. a complete processing for anticorrosion aluminium foaming mould foundry goods, is characterized in that comprising the following steps:
(1) batching
Meet following requirement according to element mass percent: Si≤0.15%, Fe≤0.25%, Cu 2.4-2.8%, Mn≤0.2%, Mg 1.8-2.5%, Cr≤0.05%, Zn 5.5-6.5%, Ti≤0.06%, Zr 0.08-0.15%, La 0.04-0.06%, Er 0.05-0.08%, Gd 0.02-0.04%, other impurity elements add up to≤0.15%, all the other are Al, prepare burden;
(2) melting
Batching is dropped into successively and in smelting furnace, carries out melting, in stove, be controlled at 695-760 ℃, feed intake after 40-60min, there is aluminium water in stove time, add insulating covering agent to cover, start stir, after adjusting component, add refining agent through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature leaves standstill and keeps 20-30min under 710-740 ℃ of condition, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
Described insulating covering agent is the mixture of the silicon-dioxide of 60-70% and the perlite of 30-40% composition;
Described refining agent is made by following raw materials in part by weight: sodium-chlor 5-8, Calcium Fluoride (Fluorspan) 3-5, salt of wormwood 3-5, Graphite Powder 99 5-8, Sodium Silicofluoride 8-10, magnesium oxide 5-8, sepiolite 8-10, trees ash 5-8, NaBF 48-10, NaF 5-8;
Described refining agent preparation method is as follows:
A, by 10-15% salt acid soak 3-4 hour for the sepiolite of above-mentioned weight part, deionized water wash, then soak 3-4 hour with 10-12% sodium hydroxide solution, then with deionized water wash to neutral, then at 500-530 ℃, calcine 2-3 hour, be ground into nanometer powder;
B, by after the each heating raw materials melting beyond sepiolite, clarification 1-2 hour, is poured into water cold quenching by clear liquor above, obtains broken particle;
C, the mixing of materials that step a, b are obtained stir and obtain described refining agent;
(3) casting
Aluminium liquid enters crystallizer by the relief hole of smelting furnace through aluminium groove, casts out needed foundry goods, and casting temp is controlled at 690-725 ℃, casting speed control 32-45mm/min, and cooling water flow is controlled at 950-1150 l/min;
(4) thermal treatment
Foundry goods is carried out after surface treatment, carry out homogenizing annealing processing, detailed process is as follows: be first warming up at 305-320 ℃, insulation 2-3h, a 70-90 per hour ℃ intensification is heated to be incubated 6-8h at 530-560 ℃, then air cooling, then a 60-80 per hour ℃ intensification is heated to 350-370 ℃, and degree of insulation 5-6h; Be cooled at 160-180 ℃ again and be incubated 3-4h, air cooling is to room temperature.
CN201210503579.4A 2012-12-01 2012-12-01 Processing method of corrosion-resisting aluminum alloy foaming die cast Expired - Fee Related CN103014456B (en)

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CN103484728B (en) * 2013-08-26 2015-09-16 天津金轮自行车集团有限公司 A kind of Aluminum alloy for bicycle frame tube and preparation method thereof
CN104046864B (en) * 2014-03-28 2017-06-13 安徽硕力实业有限公司 A kind of high-thermal-conductivity low-expansibility coefficient rare earth aluminium alloy transmission material and preparation method thereof
CN105153726A (en) * 2015-09-24 2015-12-16 安徽卓越电力设备有限公司 Aluminum alloy bottom plate used for preassembled substation box
CN105154729B (en) * 2015-09-29 2017-04-12 济南大学 Cast aluminum-zinc-magnesium-copper-tantalum alloy and manufacturing method thereof
CN105369076A (en) * 2015-11-18 2016-03-02 宁波市鄞州永佳电机工具有限公司 Handheld tool for getting-on and getting-off processes
CN105416126A (en) * 2015-11-18 2016-03-23 宁波市鄞州永佳电机工具有限公司 Improved type handheld tool for getting on or off automobile
CN105448599A (en) * 2015-11-20 2016-03-30 宁波市鄞州永林电子电器有限公司 Relay in improved structure
CN107130129B (en) * 2017-07-18 2018-10-23 合肥万之景门窗有限公司 A kind of composite refiner of aluminium alloy and preparation method thereof
CN112941380A (en) * 2021-01-28 2021-06-11 北京工业大学 High-strength wrought aluminum alloy and solid-state welding method

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CN101560636A (en) * 2009-05-13 2009-10-21 葫芦岛锌业股份有限公司 Hot dipping alloy plating added with La element and preparation method thereof
CN101698916A (en) * 2009-11-13 2010-04-28 中国航空工业集团公司北京航空材料研究院 Novel high-strength/tenacity aluminum alloy and preparation method thereof

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