09-04-2014 дата публикации
Номер: CN103710507A
Принадлежит:
The invention relates to a method for preparing a low-nickel duplex stainless steel hot-rolled coil, and belongs to the technical field of metal pressure machining. The method comprises the following process steps: grinding, heating, cogging and rolling, cooling, heating, rough rolling, finish rolling, cooling and coiling, wherein a casting blank is heated to 1150-1195 DEG C after being ground and thermally insulated for 50-70 minutes in a soaking zone of a heating furnace; the cogging and the rolling adopt 3-5 passes, the pass relative reduction ratio is controlled at 8-20% during the cogging, the rolling speed is controlled at 2-7mm/s, and plate blanks are thermally insulated by a thermal insulation cover on an orbit during the cogging and the rolling; a steekle mill is adopted to roll for 5-9 passes during the finish rolling, the pass relative reduction ratio is controlled at 10-25%, the rolling speed is controlled at 2-12m/s,and the finish rolling temperature is greater than or equal ...
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