Accreditation Administration System:
Cold-rolled: hot rolled coils as raw material, after acid washing to remove oxide scale then cold rolling , the finished product as a rolling hard volume, due to continuous cold deformation caused by work hardening the rolling hard volume strength, hardness increased , toughness Plastic indicators declined , so press performance will deteriorate, can only be used for simple deformation of the parts. Rolling hard copy can be used as hot dip galvanizing plant raw material, as hot dip galvanizing line are set a back line of fire . rolling hard Volume heavy generally 6 to 13.5 tons , the coil at room temperature , the hot pickling volume continuous rolling . Inner diameter is 610mm
Features : because there is no annealing , the hardness is high (HRB greater than 90) , machining performance is extremely poor and only a simple directional less than 90 degrees bending processing
simply speaking, the cold-rolled , is hot rolled coil on the basis of processed rolling out , in general, are hot rolled --- pickling --- cold this process .
