Although there is no thermal plastic compression during the forming process, there is still residual stress in the cross section of the cold plate. The cold plate must have an impact on the overall and local buckling characteristics of the steel. It can be made into a variety of cross-sectional forms, the production process of cold rolled steel sheet and Hot Rolled Steel Sheet are different.
Hot-rolled is rolled at high temperature. Cold-rolled steel has better strength and cold-rolled and hot-rolled steel has better ductility. The thickness of cold rolling is generally small, and the thickness of hot rolling can be larger. Cold plates are used to cold-bend springs and other parts. The thickness is very standard. It looks a bit brighter than stainless steel when there is no rust; the hot-rolled surface is rough.
There is no rule for cold rolling. The thickness of cold-rolled cold-rolled steel is small, and the cold-rolled plate is not thickened at the corner where the plate joins. At the same time, because the yield point is closer to the tensile strength, cold-rolled and hot-rolled are two types. Different steel rolling technology, cold rolling is the steel is rolled at room temperature, the hardness of this steel is large.
Cold Rolled Steel Sheet has high packaging requirements to prevent the product from being scratched on the surface during transportation. In addition to the above procedures, there are also special procedures when producing some special products. For example, when rolling a silicon steel sheet, decarburization annealing should be performed before cold rolling, and coating film, high temperature annealing, tensile straightening (see tension straightening), and tempering should be performed after rolling. Cold rolling is usually performed by longitudinal rolling. The cold rolling production process generally includes raw material preparation, rolling, degreasing, annealing (heat treatment), finishing, and the like. Cold plate cold rolling uses hot rolled products as raw materials. Raw materials must be descaled before cold rolling to ensure that the surface of the cold rolled products is clean.
Cold Rolled Steel Sheet
Cold plate rolling is the main process of deforming the material. The purpose of degreasing is to remove the lubricating grease attached to the rolling material during rolling, so as not to contaminate the surface of the steel during annealing, and to prevent carbon addition to stainless steel. Annealing includes intermediate annealing and heat treatment of the finished product. The intermediate annealing is to eliminate the work hardening caused by cold deformation through recrystallization to restore the plasticity of the material and reduce the deformation resistance of the metal. The purpose of the heat treatment of the finished product is to eliminate hardening by recrystallization. It is also based on the technical requirements of the product to obtain the required organization (such as various textures, etc.) and product properties (such as deep drawing, electromagnetic properties, etc.). Cold plate finishing includes inspection, cutting, straightening (leveling), printing, sorting and packaging.
The above is the plastic deformation of the cold rolled steel sheet introduced by Galvanized Steel Sheet Manufacturer. Hope to help you.