New technologies for cold-rolled sheets and strips and coated layers

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This post was last edited by yuchenchf on 2015-10-20 at 16:20. New technologies for cold-rolled sheets and coatings. Cold-rolled sheets and their coated products are widely used in industries such as construction, automotive, home appliances, and transportation; in particular, coated sheets continue to show strong growth trends. Its technological advancements are mainly reflected in the following: (1) The combination of pickling and cold rolling allows for an increase in the yield rate by 1%–3%, a rise in output per machine hour by 30%–50%, a reduction in the area required for intermediate storage by 5,000–10,000 square meters, and a decrease in roller consumption by 40%–50%. This leads to lower production costs and investment requirements ； (2) Continuous annealing yields products of high quality, with good sheet shape, smooth surface, and uniform properties; it can increase the yield rate by 1% to 3%, offers a variety of steel grades, saves more than 20% in energy consumption, reduces the production cycle from 10 days to less than 1 day, and requires less floor space for the equipment ； (3) Full-hydrogen bell-type annealing is twice as efficient as traditional bell-type furnaces; it yields products with excellent deep-drawing properties and a smooth surface, making it particularly suitable for producing cold-rolled coils in small batches with a variety of types ； (4) Sheet shape control technology has seen significant progress; hydraulic bending rolls, process lubrication and cooling, as well as closed-loop control are widely used, and a number of new types of rolling mills have been developed that can effectively control sheet shape ； (5) Significant progress has been made in the production technologies for coating layers such as hot-dip galvanizing, hot-dip galvanizing of aluminum and zinc-iron alloys, electro-galvanizing, fingerprint-resistant sheets, organic-coated sheets, vibration-damping sheets, tin plating, chromium plating, lead plating, and lead-tin plating.