How do cold-drawn seamless steel tubes perform surface rolling? Next, cold-drawn steel pipe manufacturers to introduce it. There are three basic rolling surface processes for sheet and strip, which are expressed by the production process of sheet and strip village.
1: After hot rolling, annealing, pickling and descaling. The surface of treated steel plate is a kind of dim surface, a little rough.
2: better than N0.1 surface processing, but also a dim surface. After cold rolling, annealing, descaling, and finally light rolling with surface rolls.
3: This is the most commonly used in building applications. Except for the last slight cold rolling with polishing rolls after annealing and scaling, other processes are the same as 2D, and the surface is slightly luminous, so polishing can be done.
4: Bright annealing: This is a reflective surface, which is rolled by polishing rolls and annealed in a controlled atmosphere. Bright annealing still maintains its reflective surface and does not produce oxide scale. Because there is no oxidation reaction during bright annealing, no acid pickling and passivation treatment are needed.
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