Generally, cold rolled steel, such as galvanized steel and color steel plate, must be annealed, so it has good plasticity and elongation, and is widely used in automobile, household appliances, hardware and other industries. The surface of the cold-rolled sheet has a certain℃of finish, which is smooth to the touch, mainly due to pickling. Generally, the surface finish of the hot rolled plate cannot meet the requirements, so the hot rolled steel strip needs to Be cold rolled. Nneɛma a ɛyɛ hyew a wɔabobɔw no mu duru no taa yɛ 1.0mm, na dade a wɔabobɔw a ɛyɛ nwini no betumi adu 0.1mm. Hot rolling rebɔ wɔ crystallization temperature point no atifi, na cold rolling no rebɔ wɔ crystallization temperature no ase.
Nsakrae a ɛba dade nsusuwii mu a ɛyɛ nwini a ɛrehuruhuruw no yɛ awɔw mu nsakrae a ɛkɔ so. adwuma a ɛyɛ nwini a ɛyɛ den a ɛnam saa adeyɛ yi so ba no ma ahoɔden ne den a ɛwɔ coil a ɛyɛ den a wɔabobɔw no mu no kɔ soro na toughness ne plasticity index no so tew.
