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Surface Treatment Process of Flat Steel

Surface Treatment Process of Flat Steel

Ⅰ. Wide application of flat steel

The application of steel in the construction industry is a very common construction method. The types of steel used in the construction of different industries are also different. Flat steel is a very common kind of application. It is widely used in various building structures and Engineering structures, such as building beams, bridges, power transmission towers, lifting and transporting machinery, ships, industrial furnaces, reaction towers, container racks, warehouse shelves, etc. So what are the ways in the processing of flat steel?


Ⅱ. Flat steel processing method

1. There are problems in the surface treatment of flat steel. The welding seam defects are more serious. Manual mechanical polishing is used to make up for it. The resulting polishing marks cause uneven surface and affect the appearance. On the basis of large flat steel production equipment and technology, in accordance with the technical requirements of the plate and the size of the flange plate, the slats produced by continuous casting, finishing rolling, finishing and other processes are rolled at one time.


2. It is a semi-finished product of light steel structure products, and it is also the development trend of light steel structure materials in China. Semi-finished flange panels have been widely used in light steel structure construction abroad. The use of this product will effectively save costs for enterprises and improve their market competitiveness. The chemical composition of stainless steel flat steel belongs to the rolled steel series for general structural use. Flat steel can be a finished steel product, or it can be used as a billet for welded pipes and thin slabs for stacked sheets.


3. Flat steel cold deformation method (C treatment method) after solid solution treatment, cold deformation at room temperature, the amount of martensite formed during cold deformation is related to the amount of deformation and the composition of stainless steel. Generally, the required amount of martensite can be obtained with a deformation amount of 15% to 20%. Excessive deformation will cause the martensite to work hardening and significantly reduce the plasticity. After the aging treatment is adjusted, the aging treatment must be carried out.


4. The connection methods include welding and bolt connection. When in use, the design requirements and conditions are determined. Generally, welding is used for buried (wall) or hidden in concrete. Welding ( The lap length of two flat steels is greater than 2.2-2.5 times the width of the flat steel, and the lap length of the round steel and the flat steel is greater than 6-8 times the round steel ). The weld is not allowed to contain slag and bite and remove the welding slag. After the welding is completed, anti-corrosion and anti-rust should be carried out except the concrete.

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