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23
2022-06
Q&A on Cold-Rolling Production Processes
What are the requirements for the incoming material of cold-rolled sheet in a rolling mill?
23
2022-06
Summary of Defects in the Steel Strip Pickling and Cold Rolling Processes
Hot-rolled raw material, push‑pull hydrochloric acid pickling, single‑stand reversible cold rolling, electro‑degreasing and rinsing, full‑hydrogen (or nitrogen–hydrogen) annealing furnace, single‑stand skin‑pass rolling, heavy‑coil slitting (or cross‑slitting), stretch‑bend straightening, packaging, storage, and transportation, among others.
23
2022-06
Causes of Edge Bulging Defects in Cold-Rolled Steel Strips and Corresponding Control Measures
Edge buckling in steel coils is primarily caused by irregularities in the transverse cross‑section of hot‑rolled coils—specifically, localized high points—which result in bulging or strip‑like protrusions along the cold‑rolled strip at these elevated areas.
23
2022-06
Since entering the industry in 2017, I’ve often heard many people—traders and downstream manufacturers—wondering: Where has all this strip steel (hot‑rolled strip steel, hereafter referred to as “strip steel”) gone? Despite producing such large volumes every day, steel mills never struggle to sell; everyone keeps saying that one brand or another of strip steel is hard to work with, yet it still sells out—often at market prices. Some sales representatives, too, frequently complain that strip steel is difficult to move, but by the time they try to offload it, the goods have already been snapped up, whether destined for the open market or direct to downstream customers.
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