阅读说明：本技术 一种散热器用铝合金型材加工工艺 (Processing technology of aluminum alloy section for radiator ) 是由 田泽 于 2019-10-24 设计创作，主要内容包括：本发明是一种散热器用铝合金型材加工工艺,包括以下步骤：将制备铝合金型材的原料投入蓄热式喷嘴熔炼炉内进行熔炼；向熔炼炉内加入精炼剂进行精炼；静置完成后,立即对铝熔体进行在线除气；除气完成后,放炉,对铝熔体进行除渣作业,然后进行浇铸,将型材热轧处理至5-8mm的厚度,冷却至常温,然后根据散热器产品的要求,进行冷轧至产品的规定厚度并锯切成所需的长度；将切割好的型材进行均匀化退火处理；对型材进行清洗、化学抛光、除油、活化、浸锌、水洗、干燥处理。本发明生产的散热器铝合金型材具有良好的延展性,表面处理后,增强了焊接强度,热传导性能良好,强度高,具有良好的耐腐蚀性能。(The invention relates to a processing technology of an aluminum alloy section for a radiator, which comprises the following steps: putting raw materials for preparing the aluminum alloy section into a heat accumulating type nozzle smelting furnace for smelting; adding a refining agent into the smelting furnace for refining; after standing, immediately carrying out online degassing on the aluminum melt; after degassing, putting the aluminum alloy into a furnace, deslagging the aluminum melt, casting, hot rolling the section to 5-8mm of thickness, cooling to normal temperature, cold rolling to the specified thickness of the product according to the requirement of a radiator product, and sawing to the required length; carrying out homogenization annealing treatment on the cut section; cleaning, chemically polishing, deoiling, activating, soaking zinc, washing and drying the section. The radiator aluminum alloy section produced by the invention has good ductility, the welding strength is enhanced after surface treatment, the heat conduction performance is good, the strength is high, and the corrosion resistance is good.)

1. The processing technology of the aluminum alloy section for the radiator is characterized by comprising the following steps of:

(1) putting raw materials for preparing the aluminum alloy section into a heat accumulating type nozzle smelting furnace for smelting, performing gas-filled stirring in the smelting process to accelerate the smelting speed, wherein the stirring time is 30-35min, then uniformly putting a slag striking agent into the smelting furnace according to 0.1-0.2% of the total mass of the raw materials, when the temperature in the smelting furnace reaches 700-720 ℃, performing slag removing operation on slag in an aluminum melt until no continuous piece of scum exists, sampling after slag removing for component analysis, then adjusting alloy components to enable the alloy components to meet the requirements, and the smelting time of the aluminum melt is 4-5 h;

(2) adding a refining agent into the smelting furnace for refining, wherein the refining temperature is 710-730 ℃, the refining time is 15-20min, scum on the surface of the aluminum melt needs to be removed in the refining process, and the aluminum melt is kept stand for 20-30min after the refining is finished;

(3) after standing, immediately carrying out online degassing on the aluminum melt;

(4) after degassing, putting the aluminum alloy into a furnace, deslagging the aluminum melt, casting at the casting temperature of 705-710 ℃ at the casting speed of 15-20mm/min, carrying out hot rolling treatment on the section to the thickness of 5-8mm, cooling to normal temperature, carrying out cold rolling to the specified thickness of the product according to the requirement of a radiator product, and sawing to the required length;

(5) carrying out homogenization annealing treatment on the cut section, firstly heating to the temperature of 300-320 ℃, preserving heat for 2-3h, then heating to the temperature of 520-90 ℃ and preserving heat for 6-8h at the temperature of 550-520 ℃ per hour, then cooling to the temperature of 150-180 ℃, preserving heat for 3-4h, and finally cooling to the normal temperature;

(6) cleaning, chemically polishing, deoiling, activating, soaking zinc, washing and drying the section.

2. The process for manufacturing an aluminum alloy profile for a radiator as claimed in claim 1, wherein in the step (3), in-line degassing, Ar and Cl are first used₂Degassing the mixed gas with the gas flow rate of 2-4m³T aluminium melt, Ar and Cl₂The flow ratio of (1: 0.03) and the partial pressure of0.1-0.3Mpa, the rotor speed is 300-; then Ar is adopted for degassing, and the gas flow is 2-4m³The partial pressure of the aluminum melt is 0.1-0.3Mpa, and the rotor speed is 300-500 rpm/min; during degassing, the temperature of the aluminum melt is controlled to be 700-710 ℃.

3. The process for manufacturing an aluminum alloy profile for a radiator according to claim 2, wherein the deslagging operation after degassing in step (4) is performed by three stages, wherein the deslagging operation is performed by using filter cloth for the first stage, the deslagging operation is performed by using a ceramic filter plate for the second stage, and the deslagging operation is performed by using a tubular filter box for the third stage.

4. The process for manufacturing an aluminum alloy profile for a radiator according to claim 3, wherein the cleaning in the step (6) is alcohol immersion cleaning, and the chemical polishing is to polish the profile in a mixed solution of phosphoric acid and glacial acetic acid at a temperature of 80-100 ℃ to obtain a smooth plane.

5. The process for manufacturing an aluminum alloy profile for a radiator according to claim 4, wherein the step (6) of removing oil is carried out by treating the surface of the profile with a mixed solution of sodium hydroxide and sodium phosphate.

Technical Field

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

Background

At present, the aluminum alloy radiator has obvious advantages in light weight of materials, has good ductility and excellent heat conduction performance, and is widely applied.

However, the existing aluminum alloy section for radiators often has the defects of high hydrogen content, oxide film, inclusion and the like in the production process, influences the physical properties, mechanical properties and service properties of products, and has poor welding strength.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a processing technology of an aluminum alloy section for a radiator.

In order to achieve the purpose, the invention adopts the following technical scheme:

a processing technology of an aluminum alloy section for a radiator comprises the following steps:

(1) putting raw materials for preparing the aluminum alloy section into a heat accumulating type nozzle smelting furnace for smelting, performing gas-filled stirring in the smelting process to accelerate the smelting speed, wherein the stirring time is 30-35min, then uniformly putting a slag striking agent into the smelting furnace according to 0.1-0.2% of the total mass of the raw materials, when the temperature in the smelting furnace reaches 700-720 ℃, performing slag removing operation on slag in an aluminum melt until no continuous piece of scum exists, sampling after slag removing for component analysis, then adjusting alloy components to enable the alloy components to meet the requirements, and the smelting time of the aluminum melt is 4-5 h;

(2) adding a refining agent into the smelting furnace for refining, wherein the refining temperature is 710-730 ℃, the refining time is 15-20min, scum on the surface of the aluminum melt needs to be removed in the refining process, and the aluminum melt is kept stand for 20-30min after the refining is finished;

(3) after standing, immediately carrying out online degassing on the aluminum melt;

(4) after degassing, putting the aluminum alloy into a furnace, deslagging the aluminum melt, casting at the casting temperature of 705-710 ℃ at the casting speed of 15-20mm/min, carrying out hot rolling treatment on the section to the thickness of 5-8mm, cooling to normal temperature, carrying out cold rolling to the specified thickness of the product according to the requirement of a radiator product, and sawing to the required length;

(5) carrying out homogenization annealing treatment on the cut section, firstly heating to the temperature of 300-320 ℃, preserving heat for 2-3h, then heating to the temperature of 520-90 ℃ and preserving heat for 6-8h at the temperature of 550-520 ℃ per hour, then cooling to the temperature of 150-180 ℃, preserving heat for 3-4h, and finally cooling to the normal temperature;

(6) cleaning, chemically polishing, deoiling, activating, soaking zinc, washing and drying the section.

When in-line degassing is carried out in the step (3), Ar and Cl are firstly adopted₂Degassing the mixed gas with the gas flow rate of 2-4m³T aluminium melt, Ar and Cl₂The flow ratio of the high-pressure-resistant material to the high-pressure-resistant material is 1:0.03, the partial pressure is 0.1-0.3Mpa, and the rotating speed of a rotor is 300-500 rpm/min; then Ar is adopted for degassing, and the gas flow is 2-4m³The partial pressure of the aluminum melt is 0.1-0.3Mpa, and the rotor speed is 300-500 rpm/min; during degassing, the temperature of the aluminum melt is controlled to be 700-710 ℃.

And (4) deslagging after degassing in the step (4) by three stages, wherein deslagging by using filter cloth is performed in the first stage, deslagging by using a ceramic filter plate is performed in the second stage, and deslagging by using a tubular filter box is performed in the third stage.

And (6) cleaning by alcohol immersion cleaning, wherein in the chemical polishing, the section is put into a mixed solution of phosphoric acid and glacial acetic acid for polishing, and the temperature is 80-100 ℃ to obtain a smooth plane.

In the step (6), mixed solution of sodium hydroxide and sodium phosphate is adopted for removing oil to treat the surface of the section.

The invention has the beneficial effects that: the radiator aluminum alloy section produced by the invention has good ductility, the welding strength is enhanced after surface treatment, the heat conduction performance is good, the strength is high, and the corrosion resistance is good.

Detailed Description

The invention will be further illustrated with reference to specific examples: