20 smelting furnaces were smelted in this test, totaling more than 2200 tons. The furnaces were connected in a continuous manner and reached 18 furnaces. The multi-furnace furnaces were pulled, the chemical composition was well controlled, and the quality of the slabs was in good condition; This time, about 1467.7 tons, product thickness specifications were 10, 11, 14, 16 and 18mm respectively, and the surface quality was good. From the test results, the pass rate of mechanical properties of steel plate reaches 100%.
It is understood that, compared with Nb, Al has the same grain refinement, improve the strength and toughness of the steel, and cheap, adequate resources, after preliminary accounting to Al generation Nb-ton steel can reduce the cost of 50 yuan. At the same time, this trial production has achieved multi-furnace pull, and the slabs are directly sent to the furnace to reduce the energy consumption and make the smelting and rolling connections more compact, facilitating production organization.