CN103352155A - High temperature-resistant high-thermal conduction aluminum alloy for radiator of air conditioner and manufacturing method thereof - Google Patents

Abstract

The invention provides a high temperature-resistant high-thermal conduction aluminum alloy for a radiator of an air conditioner. The aluminum alloy is characterized by comprising the following components: on the basis of weight percentage, 3.0 to 3.5 of Zn, 1.2 to 1.5 of Fe, 0.5 to 0.9 of As, 0.2 to 0.24 of Sb, 1.7 to 1.9 of Mg, 0.12 to 0.15 of Mo, 1.9 to 2.2 of V, 0.55 to 0.65 of Ta and 0.32 to 0.36 of Ta, with the balance being Al. The invention further discloses a manufacturing method for the aluminum alloy. The aluminum alloy for casting provided by the invention has a high heat conductivity coefficient of 195 to 215 W/m.K and good heat dissipation capability; under the condition of same thickness, the aluminum alloy manufactured in the invention has high strength and good resistance to sagging at a high temperature and meets the requirement of no collapse of a fin of an automobile radiator during high temperature soldering.

Description

Resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy and manufacture method thereof

Technical field

The invention belongs to a kind of aluminium alloy, specifically a kind of air conditioner heat radiator aluminum alloy materials.

Background technology

The air-conditioning heat dissipation structural part is to be made by aluminium alloy mostly, comprises cast member, squeezes type spare, stamping parts and forge piece etc.Aluminum alloy cast forging piece cost is lower, but its thermal conductivity of aluminum alloy junction member of general cast form is not high, usually about 90 W/mK, to such an extent as to heat conductivility is poor, present fine aluminium commonly used (purity＞more than 99%) is although thermal conductivity very high (＞220 W/mK), but its flowability and castibility are bad, and too soft, be difficult for processing, and yielding.At present, the casting aluminum alloy that the research thermal conductivity is high, intensity is high, most important to air conditioner heat radiator.

Summary of the invention

The object of the present invention is to provide a kind of resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy and manufacture method thereof.

The technical solution used in the present invention is:

Resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy, it is characterized in that the weight percentage of its component is: zinc 3.0-3.5, iron 1.2-1.5, As0.5-0.9, Sb0.2-0.24, Mg1.7-1.9, Mo0.12-0.15, V1.9-2.2, Ta0.55-0.65, Ta0.32-0.36, surplus are aluminium.

The manufacture method of described resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy, comprise melting, skim, detect alloying constituent and adjust, add refining agent refining, casting, it is characterized in that: be cooled to 520-545 ℃ with 60-80 ℃ of/hour speed after the casting, be incubated 4-6 hour; Then, be cooled to 410-430 ℃ with 55-75 ℃ of/hour speed again, be incubated 2-3 hour; Be warming up to 480-510 ℃ with 50-70 ℃ of/hour speed again, be incubated 2-3 hour; Be cooled to 160-180 ℃ with 110-130 ℃ of/hour speed again, be incubated 2-3 hour; Be warming up to 280-310 ℃ with 80-90 ℃ of/hour speed again, be incubated 2-3 hour; Be cooled to room temperature with 160-180 ℃ of/hour speed again;

Described refining agent is formed by the feed composition mixing briquetting of following weight part: vermiculite power 6-7, sodium aluminum fluoride 2.3-2.5, SnO ₂2.2-2.5, Calcium Fluoride (Fluorspan) 2.2-2.4, gac 2.5-2.8, sodium-chlor 2-3, Bi ₂O ₃1.1-1.3, vanadium diboride 2.1-2.4, bauxitic clay 2.1-2.5, nano silicon 1-2.

The present invention processes through above-mentioned refining agent, obtain high-quality molten aluminium alloy, such molten aluminium alloy is used for Foundry Production, obviously improve yield rate, particularly the degree of porosity in the foundry goods reduces the 1-2 degree, is controlled effectively, and can not produce pore at cast(ing) surface, trapped oxide also obviously reduces, and oxide inclusion is about 2 grades.

Casting aluminum alloy of the present invention, thermal conductivity be up to 195～215W/mK, perfect heat-dissipating, and under same thickness, product has higher intensity, and sink-resistance performance is good under the high temperature, and fin does not subside in the time of adapting to the automobile radiators high temperature brazing.

Embodiment

Resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy, the weight percentage of its component is: zinc 3.0-3.5, iron 1.2-1.5, As0.5-0.9, Sb0.2-0.24, Mg1.7-1.9, Mo0.12-0.15, V1.9-2.2, Ta0.55-0.65, Ta0.32-0.36, surplus are aluminium.

The manufacture method of resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy comprises melting, skims, detects alloying constituent and adjusts, adds refining agent refining, casting, is cooled to 520-545 ℃ with 60-80 ℃ of/hour speed after the casting, is incubated 4-6 hour; Then, be cooled to 410-430 ℃ with 55-75 ℃ of/hour speed again, be incubated 2-3 hour; Be warming up to 480-510 ℃ with 50-70 ℃ of/hour speed again, be incubated 2-3 hour; Be cooled to 160-180 ℃ with 110-130 ℃ of/hour speed again, be incubated 2-3 hour; Be warming up to 280-310 ℃ with 80-90 ℃ of/hour speed again, be incubated 2-3 hour; Be cooled to room temperature with 160-180 ℃ of/hour speed again;

Described refining agent is formed by the feed composition mixing briquetting of following weight part (kilogram): vermiculite power 7, sodium aluminum fluoride 2.3, SnO ₂2.5, Calcium Fluoride (Fluorspan) 2.4, gac 2.8, sodium-chlor 2, Bi ₂O ₃1.1, vanadium diboride 2.4, bauxitic clay 2.5, nano silicon 1.

Intensity of aluminum alloy of the present invention reaches 320Mpa-340MPa, and hardness can reach 100HB～125HB, unit elongation 4-8%, the corrosion rate of its salt-fog test only be the 0.1-0.2 milligram/centimetre ². day.Thermal conductivity 195-215W/mK.

Claims (2)

1. resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy, it is characterized in that the weight percentage of its component is: zinc 3.0-3.5, iron 1.2-1.5, As0.5-0.9, Sb0.2-0.24, Mg1.7-1.9, Mo0.12-0.15, V1.9-2.2, Ta0.55-0.65, Ta0.32-0.36, surplus are aluminium.

2. the manufacture method of resistant to elevated temperatures high thermal conduction air conditioner heat radiator aluminium alloy according to claim 1, comprise melting, skim, detect alloying constituent and adjust, add refining agent refining, casting, it is characterized in that: be cooled to 520-545 ℃ with 60-80 ℃ of/hour speed after the casting, be incubated 4-6 hour; Then, be cooled to 410-430 ℃ with 55-75 ℃ of/hour speed again, be incubated 2-3 hour; Be warming up to 480-510 ℃ with 50-70 ℃ of/hour speed again, be incubated 2-3 hour; Be cooled to 160-180 ℃ with 110-130 ℃ of/hour speed again, be incubated 2-3 hour; Be warming up to 280-310 ℃ with 80-90 ℃ of/hour speed again, be incubated 2-3 hour; Be cooled to room temperature with 160-180 ℃ of/hour speed again;

Described refining agent is formed by the feed composition mixing briquetting of following weight part: vermiculite power 6-7, sodium aluminum fluoride 2.3-2.5, SnO ₂2.2-2.5, Calcium Fluoride (Fluorspan) 2.2-2.4, gac 2.5-2.8, sodium-chlor 2-3, Bi ₂O ₃1.1-1.3, vanadium diboride 2.1-2.4, bauxitic clay 2.1-2.5, nano silicon 1-2.