| 摘要 |
PURPOSE:To obtain the hot-dipped steel plate having excellent smoothness by gas-wiping the molten metal-deposited surface of the band steel coming out of a plating bath, and then reheating to allow the surface layer of the plated membrane to reflow. CONSTITUTION:The surface of a band steel 1 is cleaned in a reducing furnace 4 in a hot dipping line and dipped in a hot dipping bath 6, then drawn out into the atmosphere through a sink roll 7, and the plating amt. is regulated by a gas-wiping device 8. Said band steel is successively heated by a reheating burner 9, and the surface of the plated metal is allowed to reflow to smooth the plated surface by surface tension. The molten metal is solidified by natural cooling, and then forcibly cooled by blowing air with a cooler 10. In this way, the smoothness of the plated surface can be improved in the continuous Al dipping, etc. |
