Pressure aluminum die casting application industry

scanning:174 author:John kino time:2017-07-21 classify:Industry News
Aluminum castings are used in detail, construction, hardware, equipment, engineering machinery and other large machinery, machine tools, ships, aerospace, cars, locomotives, electronics, computers, electrical appliances, lamps and other occupations, many of them are ordinary people touching all day, but not Understand the metal objects.

Aluminum castings are used in detail, construction, hardware, equipment, engineering machinery and other large machinery, machine tools, ships, aerospace, cars, locomotives, electronics, computers, electrical appliances, lamps and other occupations, many of them are ordinary people touching all day, but not Understand the metal objects.

Common problems with aluminum castings:

1. The shortcomings of cast aluminum parts with low quality and appearance requirements can be repaired by a welding machine with large heat and high speed such as argon arc welding machine.

2. The cold welder has overcome the above shortcomings. Its strengths are mainly manifested in the small heat affected zone. The cast aluminum parts do not need to be preheated, and are cold-welded at room temperature. Therefore, there is no deformation, undercut and residual stress, and local annealing will not occur. Alter the metal arrangement of the aluminum castings. Therefore, the cold welder is suitable for repairing the defects of the fine cast aluminum parts.

3, aluminum castings due to a variety of factors, often there are shortcomings such as pores, pinholes, slag inclusions, cracks, pits. Commonly used repairing equipment are argon arc welding machines, resistance welding machines, cold welding machines, and the like.

4. However, in the field of repairing defects of fine aluminum castings, because of the great influence of argon welding heat, the deformation of aluminum castings, the decrease of hardness, the blisters, the local annealing, and the use of hardware and the entire mechanical and electronic occupations, etc. In an ever-expanding trend.

Aluminum castings are used in detail, construction, hardware, equipment, engineering machinery and other large machinery, machine tools, ships, aerospace, cars, locomotives, electronics, computers, electrical appliances, lamps and other occupations, many of them are ordinary people touching all day, but not Understand the metal objects.

The deposited film on the outer surface of the aluminum casting has a corrosion-resistant effect, so no further treatment is required in many applications. Some mechanical methods, in which the aluminum castings and the selected abrasives and polishing agents are placed in the drum for barreling, can achieve a good bright appearance. Polishing can make the casting look bright and reflective, but the final effect depends to a certain extent on the type of alloy and the hardness of the cast aluminum. Shot peening can achieve a sleek appearance, and a wire brush can be used to achieve a flat and sleek appearance. Some treatments such as electroplating, painting and anodizing can improve the corrosion resistance and make the parts look beautiful.

Regarding aluminum castings, a variety of chemical dip coating methods can be used to obtain decorative corrosion resistant coatings. Aluminum castings can be further painted or unpainted. When it is required to have abrasion resistance, chemical treatment alone is not acceptable, but it can be used as a pretreatment before painting. The remaining chemical solution on the outside can be rinsed off with water, then wiped dry or naturally boring. If the aluminum casting is to be painted, it should be completed as soon as possible and as far as possible without staining the aluminum casting. When a suitable primer is used, the aluminum casting can also be enamel, painted and varnished as easily as other materials.