阅读说明：本技术 一种散热器加工工艺 (Radiator processing technology ) 是由 张恩冬 何进榜 谈结锋 王清松 周光伟 周佳彬 于 2020-04-29 设计创作，主要内容包括：本发明公开了一种散热器加工工艺,属于散热器型材加工技术领域,其技术方案要点是包括如下步骤：(1)铝熔体熔炼；在温度为675-725℃的条件下,向熔化的铝熔体中加入铝熔体重量3-7％的清渣剂,搅拌均匀,处理10-15min后,扒渣,直至无浮渣后加入1.1-1.5%的覆盖剂；(2)保温净化处理；将步骤(1)得到的铝熔体进行倒炉保温,在温度为655-685℃的条件下向铝熔体中加入除渣剂2-5‰,搅拌均匀,处理10-20min后扒渣；(3)浇注；在温度为655-685℃的条件下浇注；(4)型材表面处理。达到降低铝型材中的熔渣和针孔率,提高铝型材的机械性能的效果。(The invention discloses a radiator processing technology, which belongs to the technical field of radiator section bar processing, and the technical scheme is characterized by comprising the following steps: (1) smelting an aluminum melt; adding a slag removing agent accounting for 3-7% of the weight of the aluminum melt into the molten aluminum melt at 675-725 ℃, uniformly stirring, carrying out treatment for 10-15min, removing slag, and adding a covering agent accounting for 1.1-1.5% of the weight of the aluminum melt until no scum exists; (2) heat preservation and purification treatment; pouring the aluminum melt obtained in the step (1) for heat preservation, adding 2-5 per mill of slag removing agent into the aluminum melt at the temperature of 655-685 ℃, uniformly stirring, and removing slag after treatment for 10-20 min; (3) pouring; pouring at 655-685 ℃; (4) and (6) surface treatment of the profile. The effects of reducing the slag and pinhole rate in the aluminum profile and improving the mechanical property of the aluminum profile are achieved.)

1. The processing technology of the radiator is characterized by comprising the following steps:

(1) smelting an aluminum melt; adding a slag removing agent accounting for 3-7% of the weight of the aluminum melt into the molten aluminum melt at 675-725 ℃, uniformly stirring, carrying out treatment for 10-15min, removing slag, and adding a covering agent accounting for 1.1-1.5% of the weight of the aluminum melt until no scum exists;

(2) heat preservation and purification treatment; pouring the aluminum melt obtained in the step (1) for heat preservation, adding 2-5 per mill of slag removing agent into the aluminum melt at the temperature of 655-685 ℃, uniformly stirring, and removing slag after treatment for 10-20 min;

(3) pouring; pouring at 655-685 ℃;

(4) and (6) surface treatment of the profile.

2. The heat sink processing technology according to claim 1, wherein: the slag remover in the step (1) comprises Na₂SiF₆、Na2AlF6，Na₂SiF₆The weight ratio of the Na2AlF6 is (0.6-1.0): (0.8-1.3).

3. The heat sink processing technology according to claim 1, wherein: the covering agent in the step (1) comprises calcium fluoride, magnesium fluoride and carnallite, and the weight ratio of the calcium fluoride to the magnesium fluoride to the carnallite is (0.5-0.7): (0.3-0.6):1.

4. The heat sink processing technology according to claim 1, wherein: the slag removing agent in the step (2) comprises sodium chloride, potassium chloride, rare earth and calcium carbonate, wherein the weight ratio of the sodium chloride to the potassium chloride to the rare earth to the calcium carbonate is (2.5-3): (2-2.5): (1.2-1.5):1.

5. The heat sink processing technology according to claim 1, wherein: the surface treatment process of the sectional material in the step (4) comprises degreasing cleaning, washing, passivation treatment, washing and drying.

6. The heat sink processing technology according to claim 1, wherein: in the degreasing and cleaning step, the concentration of the degreasing agent in water is 4-6%, and the treatment temperature is 40-60 ℃.

7. The heat sink processing technology according to claim 1, wherein: and a defoaming agent is also added into the degreasing cleaning solution, and the ratio of the concentration of the defoaming agent in water to the concentration of the degreasing agent in water is (0.2-0.4): 1.

8. the heat sink processing technology according to claim 1, wherein: in the passivation treatment step, the concentration of the passivation treatment liquid is 4-6%, and the treatment temperature is 40-60 ℃.

Technical Field

The invention relates to the technical field of radiator section bar processing, in particular to a radiator processing technology.

Background

The aluminum alloy section has good ductility, surface processing treatment is easy to carry out, and the aluminum alloy section has excellent heat conduction performance, higher millennium ancient city, good corrosion resistance, moisture resistance, weather resistance and other performances, so the quality requirement on the aluminum alloy is very strict, the content of oxide films and inclusions in an aluminum melt is strictly controlled, and the lower the hydrogen content is, the better the hydrogen content is, because harmful substances such as hydrogen, oxide films and inclusions existing after the aluminum alloy is refined easily form defects such as air holes, looseness, inclusions and the like in the aluminum alloy casting, the physical performance, the mechanical performance and the heat conduction performance of the aluminum alloy casting are directly influenced, and meanwhile, the quality defects such as roughness, bubbles, cracks and the like of the surface of a product can be caused in the subsequent pouring process.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a radiator processing technology, which achieves the effects of reducing the slag and pinhole rate in an aluminum profile and improving the mechanical property of the aluminum profile.

The technical purpose of the invention is realized by the following technical scheme:

a processing technology of a radiator comprises the following steps:

(1) smelting an aluminum melt; adding a slag removing agent accounting for 3-7% of the weight of the aluminum melt into the molten aluminum melt at 675-725 ℃, uniformly stirring, carrying out treatment for 10-15min, removing slag, and adding a covering agent accounting for 1.1-1.5% of the weight of the aluminum melt until no scum exists;

(2) heat preservation and purification treatment; pouring the aluminum melt obtained in the step (1) for heat preservation, adding 2-5 per mill of slag removing agent into the aluminum melt at the temperature of 655-685 ℃, uniformly stirring, and removing slag after treatment for 10-20 min;

(3) pouring; pouring at 655-685 ℃;

(4) and (6) surface treatment of the profile.

By adopting the technical scheme, because gas, non-metallic inclusions and other harmful metals exist in the melt to different degrees, the defects of looseness, slag inclusion, pores and the like of the cast ingot are often caused, and the mechanical property, the processing property, the heat conducting property, the corrosion resistance and the surface quality of the aluminum material are greatly influenced.

After the slag removing agent is added into the aluminum melt, the slag removing agent reacts with the slag in the aluminum melt, so that the slag is separated from an aluminum casting, meanwhile, the slag floats to the surface of the aluminum melt along with the flux, the slag is effectively removed, then, the covering agent is added, a large amount of air is guaranteed to be involved in the aluminum melt, and accordingly, the slag removing and hydrogen removing efficiency is guaranteed.

In the heat preservation treatment process, the slag removing agent is added, so that slag inclusion and hydrogen in the aluminum melt can be further removed, the influence of slag inclusion and impurity gas on the quality of the aluminum profile is reduced, and the aluminum profile radiator is guaranteed to have good mechanical performance and heat conductivity. In addition, under the conditions that the smelting temperature is 675-725 ℃, the heat preservation treatment temperature is 655-685 and the pouring temperature is 655-685, the aluminum profile slag inclusion and the air holes caused by the fact that the aluminum profile slag inclusion or the air holes are not in time due to the fact that the aluminum profile slag inclusion or the air holes are formed in the aluminum melt due to the fact that the aluminum profile slag inclusion or the air holes are formed in the aluminum profile melt due to the fact that the aluminum profile slag inclusion or the air holes are not in time when the aluminum.

In conclusion, the slag removing agent and the covering agent are added in the aluminum melt smelting process, and the slag removing agent is added in the heat preservation treatment process, so that the slag and the gas in the aluminum profile are effectively removed, the temperature is controlled, the regeneration probability of the slag and the gas is reduced, the cost is saved, and the heat conductivity of the aluminum profile is improved.

The invention is further provided that the slag remover in the step (1) comprises Na₂SiF₆、Na₂AlF₆，Na₂SiF₆With Na₂AlF₆The weight ratio of (0.6-1.0): (0.8-1.3).

By adopting the technical scheme, Na₂SiF₆Has the effects of heating and refining, and can convert Na into Na₂SiF₆With Na₂AlF₆The aluminum alloy is matched for use, so that the non-metallic inclusion can be wetted and adsorbed on the surface of a flux liquid drop, and the flux can float upwards in the melt due to the fact that the density of the flux is lower than that of the melt, so that the inclusion is carried to float on the surface of the melt, the impurity content in the aluminum melt can be effectively removed, and the appearance quality, the mechanical property and the heat conductivity of the aluminum profile are guaranteed;

and Na₂AlF₆The aluminum oxide can be strongly adsorbed, the melting point is higher than 1000 ℃, and the interfacial tension between the aluminum melt and the aluminum melt is large, so that the separability between the aluminothermic melt and the molten slag can be improved, the molten slag in the aluminum melt can be more easily cleaned, the slag inclusion amount and the air hole amount contained in a finished product are reduced, and the mechanical property and the heat conductivity of the finished product are ensured.

The invention further provides that the covering agent in the step (1) comprises calcium fluoride, magnesium fluoride and carnallite, and the weight ratio of the calcium fluoride to the magnesium fluoride to the carnallite is (0.5-0.7): (0.3-0.6):1.

By adopting the technical scheme, the calcium fluoride, the magnesium fluoride and the carnallite can be uniformly dispersed on the surface of the melt in a matching way, so that the oxidation of a molten pool can be prevented, the entrainment of gas is reduced, the gathered metal drops form larger liquid clusters and then are deposited back to the molten pool, and the effect of further removing slag inclusion in the melt is achieved.

The invention is further configured that the deslagging agent in the step (2) comprises sodium chloride, potassium chloride, rare earth and calcium carbonate, wherein the weight ratio of the sodium chloride to the potassium chloride to the rare earth to the calcium carbonate is (2.5-3): (2-2.5): (1.2-1.5):1.

Through adopting above-mentioned technical scheme, the slagging-off agent that sodium chloride, potassium chloride, tombarthite and calcium carbonate were made not only has fine coverage guard action, and the fusing point of slagging-off agent is less than the fusing point of pure aluminium and the temperature of smelting in this application, and along with the fixed of slagging-off agent flux to hydrogen and the going on of deoxidation reaction process, the flux film will also be more and more compact to in effectively preventing the external air from being drawn into the aluminium melt, thereby effectively preventing the increase of the amount of hydrogen atom in the aluminium melt. In addition, the rare earth component can react with aluminum, the separated rare earth simple substance has stronger affinity with hydrogen in the melt, stable rare earth hydride which is dissolved in the aluminum melt is easily formed, the hydrogen content in the melt is reduced, meanwhile, the rare earth simple substance and aluminum oxide inclusion react to generate rare earth oxide, the rare earth oxide has larger specific gravity and can quickly sink to the bottom, thereby being convenient for removing the inclusion slag in the melt, improving the slag removal and hydrogen removal efficiency, reducing the number of the inclusion slag and air holes in the aluminum profile, and ensuring the mechanical property and the heat conduction property of the aluminum profile radiator.

The invention is further configured that the surface treatment process of the sectional material in the step (4) comprises the following steps of degreasing, cleaning, washing, passivating, washing and drying.

Through adopting above-mentioned technical scheme, carry out degrease washing, passivation with the aluminium alloy after handling, can effectively get rid of the debris on aluminium alloy surface for aluminium alloy surface turns into the difficult state of oxidizing, thereby delays the corrosion rate of metal, improves aluminium alloy radiator's life.

The invention is further set that in the degreasing and cleaning step, the concentration of the degreasing agent in water is 4-6%, and the treatment temperature is 40-60 ℃.

The invention is further set that a defoaming agent is also added into the degreasing cleaning solution, and the ratio of the concentration of the defoaming agent in water to the concentration of the degreasing agent in water is (0.2-0.4): 1.

by adopting the technical scheme, when no defoaming agent exists in the degreasing solution, the foam is easily generated in the cleaning process of the section bar, the contact between the degreasing solution and the section bar can be influenced by the existence of the foam, so that the grease removing effect on the surface of the section bar is poor, after the defoaming agent is added into the degreasing cleaning solution, the generation of bubbles in the degreasing cleaning solution can be inhibited, the surface tension is reduced, the degreasing cleaning solution can be more fully contacted with the section bar, and the cleaning efficiency of the grease on the surface of the section bar is improved,

the invention is further set that in the passivation treatment step, the concentration of the passivation treatment liquid is 4-6%, and the treatment temperature is 40-60 ℃.

In conclusion, the invention has the following beneficial effects:

1. the slag removing agent, the covering agent and the slag removing agent are used in a matched manner, so that the adsorption capacity of the slag removing agent, the covering agent and the slag removing agent is effectively improved, and the separation effect of the slag and the aluminum melt is also improved, so that the finally obtained slag is low in aluminum liquid content and light in weight, and the mechanical property of the aluminum profile is also effectively improved;

2. in the surface treatment process of the aluminum profile, the grease content on the surface of the aluminum profile is effectively reduced, so that the heat-conducting property of the aluminum profile is improved.

Detailed Description

The present invention will be described in further detail with reference to examples.

In the following examples and comparative examples:

the passivator is purchased from Shanghai Pa Ka Rice-flour noodles Co., Ltd, and has the model number of CT-3796M;

the degreasing agent is purchased from Huayang-Ensai Co Ltd, and has the model number of PWC-401;

the defoaming agent is an organic silicon defoaming agent and is purchased from Shanghai Mao congratulations chemical technology Co., Ltd;

the rare earth is purchased from Hengtai rare earth science and technology limited company of Ganzhou city, and the main components are La and Ce;

the amount of the aluminum melt was 400 kg;

the mass percentage of each element of the aluminum melt is shown in the following table, and the unit percent

Manganese oxide	Magnesium alloy	Copper (Cu)	Zinc	Silicon	Iron	Nickel (II)	Titanium (IV)	Lead (II)	Tin (Sn)	Aluminium
											0.167	0.1802	1.825	0.7464	10.45	0.7685	0.0373	0.0316	0.0320	0.0172	Balance of