Technical_Technical_Tianjin Lucktech Chemical Industry Co., Ltd.

02/09/2021

Introduction to Aluminum Brazing Technology

Brazing definition: A welding method in which a metal material with a lower melting point than the base material is used as the solder, and the liquid solder is used to wet the base material and fill the gap between the workpiece interface and make it diffuse with the base material.

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Introduction to Aluminum Brazing Technology

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02/09/2021

Welding characteristics of aluminum and aluminum alloys

Aluminum is very easy to oxidize in the air and during welding. The resulting aluminum oxide (Al2O3) has a high melting point, is very stable, and is not easy to remove. It hinders the melting and fusion of the base material. The oxide film has a high specificity and is not easy to float on the surface. It is easy to generate defects such as slag inclusion, lack of fusion, and incomplete penetration. The oxide film on the surface of aluminum and the absorption of a large amount of moisture can easily cause pores in the weld.

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Welding characteristics of aluminum and aluminum alloys

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02/09/2021

Solution to the problem of uneven appearance of water-cooled plates

The new energy vehicle battery radiator is a water-cooled plate. Because the water-cooled plate is different from the special structure of the fuel vehicle radiator, the problem of flux overflow and uneven appearance color after welding has been plagued the enterprises in the industry. This cooperative enterprise first proposed the post-welding Re-processing the requirements of appearance, to solve the problem of flux residue and uneven color.

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Solution to the problem of uneven appearance of water-cooled plates

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02/09/2021

Solution to the problem of oxide adhesion after cleaning

After ultrasonic cleaning, it is found that there are obvious oxides on the surface of the aluminum plate, which leads to the problem that the brazing cannot be carried out in the furnace

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Solution to the problem of oxide adhesion after cleaning

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02/09/2021

Solution to the problem of inner wall oxidation

Extruded pipe manufacturers can produce different products according to customer requirements. The pipes that encounter problems are extruded automotive air-conditioning pipes, which have no composite layer, and are pickled and annealed after extrusion. After the pipe is annealed, because it is not cleaned, oily carbonization and aluminum oxide appear on the inner wall of the pipe cavity, resulting in yellowing and blackening. The company hopes that chemical treatment can solve or improve this problem, avoid the scrap of this batch of products, and reduce economic losses and impact on customers.

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Solution to the problem of inner wall oxidation

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02/09/2021

Solution to the cleaning problem of densely placed aluminum inner fins

The company uses engine oil to stamp the inner fins. In the past, the fins were soaked in gasoline for cleaning. However, the fins after soaking have a heavy smell and are harmful to the employees. Because gasoline is volatile and combustible, it causes great damage to the production workshop and storage. It is dangerous to the environment, and the amount of gasoline used is relatively large, and the production cost is high.

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Solution to the cleaning problem of densely placed aluminum inner fins

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02/09/2021

Classification of water-based cleaning agents

Industrial cleaning is an important part of industrial production. With the development of industrial production from workshop-style manual rough processing to the current automated and integrated high-tech processing, industrial cleaning is also constantly improving and developing. In order to meet the higher cleaning requirements for products in the development of various industries, cleaning equipment and cleaning agents are also constantly being developed. As an important part of environmentally friendly cleaning agents, water-based cleaners can be divided into the following three types in terms of pH.

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Classification of water-based cleaning agents

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02/09/2021

Cleaning waste liquid treatment plan

The waste liquid after cleaning the metal parts contains metal ions, oil stains and some precipitated dirt. The waste liquid must be treated to meet environmental protection requirements before the waste liquid is discharged. Our company adopts on-site treatment methods of adsorption, filtration, flocculation sedimentation, oxidation and PH value system to remove oily dirt, heavier suspended solids (SS), heavy metal ions, and reduce organic matter (COD) in waste liquid to achieve national environmental protection. Emission requirements.

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02/09/2021

Cleanliness testing

Periodically immerse the cleaned metal in an acidic copper sulfate solution composed of 50g/LCuS04 solution and 20g/LH2So4 for about 1 minute, then take it out and wash it with water and observe. If the copper film on the metal surface is dense and uniform, it is judged that the metal is clean. If the copper film is not uniform and the adhesion strength is poor, the metal surface is not clean. At this time, the liquid can be refilled at a ratio of 1-2%. Because this method is simple and feasible, it is a simple method suitable for factory use

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Introduction to Aluminum Brazing Technology

Welding characteristics of aluminum and aluminum alloys

Solution to the problem of uneven appearance of water-cooled plates

Solution to the problem of oxide adhesion after cleaning

Solution to the problem of inner wall oxidation

Solution to the cleaning problem of densely placed aluminum inner fins

Classification of water-based cleaning agents

Cleaning waste liquid treatment plan

Cleanliness testing

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