Cold Forming Steel Profile is an economical cross-section lightweight thin-walled steel, also known as steel cooling bent sections or cold-formed sections. Cold-formed steel is the main material for making lightweight steel structures. It has a variety of extra-thin, reasonably shaped and complex sections that cannot be produced by hot rolling. Compared with hot rolled steel, in the case of the same cross-sectional area, the radius of gyration can be increased by 50% to 60%, and the cross-sectional moment of inertia can be increased by 0.5 to 3.0 times, so that the material strength can be reasonably utilized; compared with the ordinary steel structure (i.e., steel structure made of traditional I-beam, channel steel, angle steel and steel plate), steel can be saved by about 30% to 50%. In some cases, the amount of steel used in cold-formed steel structures is comparable to that used in reinforced concrete structures under the same conditions, making it a kind of economic section steel.
Cold-formed steel is the main material for making light steel structure, which is made by difference type Roll Forming Machine. Its wall thickness can not only be made very thin, and greatly simplifies the production process, improve production efficiency. Can be produced with the general hot rolling method is difficult to produce a uniform wall thickness, but the complex shape of the cross-section of a variety of profiles and different materials of cold-formed steel. Cold-formed steel in addition to a variety of building structures, but also widely used in vehicle manufacturing, agricultural machinery manufacturing and other aspects.
There are many varieties of cold-formed steel, according to the cross-section of open, semi-closed mouth, closed mouth. According to the shape of cold-formed channel steel, angle steel, Z-beam, square tube, rectangular tube, shaped tube, rolled door and so on. Increased cold-formed steel products yield strength grade classification, increased fine grain steel, increased the mechanical properties of the product specific assessment indicators.
Cold-formed steel is made of ordinary carbon structural steel, high-quality carbon structural steel, low alloy structural steel plate or steel strip cold-formed. Cold-formed steel is belongs to the economic section steel, also is the high efficiency and energy saving material, is a new type of steel varieties with strong vitality, it is widely used in various fields of the national economy, and its use can be approximately divided into highway guardrail plate, steel structure, automobiles, containers, steel moldboards and scaffolding, railroad vehicles, ships and bridges, steel sheet piles, power transmission pylons, other 10 categories.
In the cold-formed hollow square (rectangular) steel production, there are two different production molding process. One is first into a circle and then become square or rectangular; the other is directly into a square or rectangular. In the field of square (rectangular) steel pipe molding, the technology of directly into square or rectangular is the most advanced international molding technology. Directly into a square or rectangular process is more advanced than the first into a circle and then become square or rectangular process. First into a circle and then become square or rectangular process on the steel strip or coil material damage; and directly into a square, into a rectangular process, in the molding process basically does not cause damage to the material, can be very good to maintain the mechanical properties of the raw material and physical properties, to ensure that the product is excellent.