(1) The supply of slabs is dominated by continuous casting slabs, primary rolled slabs and steel ingots are basically eliminated, while medium-thick slabs account for the vast majority of continuous casting slabs, and the smelting technology of EH36 marine steel plate has also made great progress Progress, the produced slabs have a good surface quality and require less costly cleaning.
(2) EH36 marine steel plate adopts walking beam heating furnace, and realizes hot charging and hot delivery operation, and the hot charging rate can reach more than 40%.
(3) In order to meet the requirements of controlled rolling and shape control, the EH36 marine steel plate rolling mill has been enlarged, the rigidity of the rolling mill has been increased, the main drive capacity has been expanded, and the HAGC device and shape control device have been improved, resulting in a significant increase in yield.
(4) The rapid cooling device has been widely used and used in conjunction with the TMCP process.
(5) In order to reduce the amount of edge trimming in the process of flat plate shape control, many manufacturers have adopted an attached roller mill.
(6) Implement controlled rolling and controlled cooling, and adopt a combined straightening machine to strengthen the capacity of the hot straightening machine and expand the straightening range.
(7) The cooling bed adopts the stepping grid type, which reduces the scratches on the lower surface of the EH36 marine steel plate.
(8) Ultrasonic flaw detection method is adopted for the first time to inspect the internal defects of EH36 marine steel plate.
(9) In order to meet the requirements of the rolling mill capacity, the shearing line adopts rolling-cut double-sided shears and fixed-length shears, which not only have good cutting quality, but also have high productivity.
(10) The spraying, printing, and labeling of finished EH36 marine steel plates have been replaced by mechanical operations.
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