Both hot rolling and cold rolling are forming processes of steel plate or profile, which have great influence on the microstructure and properties of steel.
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Rolling below recrystallization temperature is called cold rolling. Hot-rolled coils are usually used as raw materials for cold rolling. After removing oxide scales by pickling, the products are rolled coils. The cold work hardening caused by continuous cold deformation makes the strength, hardness and toughness index of rolled coils increase, so the stamping performance will deteriorate and can only be used for parts with simple deformation.
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Whether the rolled piece can be cut or not depends on the thickness of the joint and the relative reduction, as well as the pass shape and dimensions of the slitting rolling. In the pass design of slitting process, the design of pre-slitting and slitting hole is particularly important, followed by the vertical box pass. The pass design of these passes is related to the success of slitting rolling.
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The technology of hot rolling mill is to connect the two processes of solidification and deformation of steel, and continuously send the continuous casting slab to the finishing mill in the hot state to directly roll the strip into the coil product.
What’s the Role of Hot Rolling Mill in Steel Rolling? Read More »
The technology of direct rolling without heating of bar and wire refers to the technology of directly sending the slab with residual heat after continuous casting into the rolling mill line for rolling. When the heating-free process is used, the billet does not need to be heated in the furnace, and it does not need to be reheated (some of which replenishes the corner parts through the electromagnetic induction device), completely eliminating the fuel consumption of the heating furnace, which can greatly save energy and reduce carbon dioxide of emissions.
Bar And Wire Rod Direct Rolling Technology without Heating Read More »