Maintenance and maintenance of aluminum alloy;

Aluminum profile products have the characteristics of high strength, light weight, strong corrosion resistance, novel structure, convenient assembly, material saving and durability. Unreasonable maintenance, installation and maintenance will also affect the appearance and surface color of aluminum profile products. Jin Zheda suggests that you should have correct maintenance and maintenance methods.

1, aluminum profile in the process of handling, must be handled with care, to prevent the surface damage caused by knock against the beautiful surface;

2, aluminum profile in the process of transportation, must be covered with tarpaulin, to prevent the invasion of rain and snow; 　

3, aluminum profile storage environment should be dry, bright, well ventilated, no corrosive climate, at the same time should be protected from rain, water, snow intrusion;

4. When aluminum profiles are stored, Jin Zheda suggests that small specifications can be put on the shelf, and the storage mode Z of large-size aluminum thick plates is to separate them from the ground with skids at the bottom and keep the distance from the ground greater than 10CM；; When large-scale materials are stacked together, Jin Zheda suggests that you use wood strips/boards and other materials to separate Z-good materials from each other.

5, aluminum profile in storage, it is strictly prohibited to store with chemical materials and moisture materials.

Key points and common problems of processing and heat treatment of imported 6061 aluminum plate material

The heat treatment of aluminum profile includes: aluminum profile processing annealing, aging, homogenization, solution heat treatment and so on. With the wide application of aluminum profile processing products, higher requirements are put forward for the quality of aluminum profile processing and heat treatment.

Let's first introduce the related knowledge of metal heat treatment:

Annealing refers to heating the workpiece to an appropriate temperature, using different holding times according to the material and the size of the workpiece, and then slowly cooling. Its main purpose is to reduce the hardness of the material and improve the plasticity, so as to facilitate the subsequent processing, reduce the residual stress and improve the homogenization of the structure and composition. According to different purposes, annealing can be divided into recrystallization annealing, stress relief and fireball annealing, complete annealing and so on. Normalization is to heat the workpiece to a suitable temperature and then cool it in the air. The effect of normalization is similar to that of annealing, except that the obtained microstructure is finer, which is often used to improve the cutting performance of materials and sometimes used for Z final heat treatment of some parts with low requirements. Quenching means that the workpiece is heated and insulated, and then it is quickly cooled in the quenching medium of water, oil or other inorganic salts and organic aqueous solution. After quenching, the material is unbalanced, usually hard and brittle. It needs to be kept at a temperature higher than room temperature for a long time, and then cooled. This process is called tempering (aging).

Metal heat treatment is a process of heating a metal workpiece in a certain medium to a suitable temperature, keeping it at this temperature for a certain time, and then cooling it at different speeds. Metal heat treatment is one of the most important processes in material production. Compared with other processing technologies, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but endows or improves the working performance of the workpiece by changing the internal microstructure of the workpiece or changing the chemical composition of the surface of the workpiece. Its characteristic is to improve the internal quality of the workpiece, which is generally not observed by the naked eye. The "four fires" in metal heat treatment refer to annealing, normalizing, quenching (solution) and tempering (aging).

As can be seen from the above definition, whether annealing, normalizing, quenching or tempering, the workpiece should be heated, insulated and cooled during heat treatment. Therefore, in metal heat treatment, heating speed, holding time and cooling speed become important technological parameters in heat treatment process.

The relationship between quenching and tempering (aging) is close, and they are often used together, and both are indispensable. However, in actual production, in order to save costs and improve production efficiency, for products with low performance requirements, online quenching is often used instead of quenching furnace, and natural aging is used instead of tempering.

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