IN-OVEN SOLDERING-COATING METHOD FOR STEEL MATERIAL SUCH AS MILD OR ALLOYED STEEL

摘要

PURPOSE:To contrive the rationalization of a process and equipment, the improvement of productivity, labor and energy saving and the curtailment of a cost, by cooling an in-oven soldered steel material in an oven, charging it in an applicator area directly connected to the oven, and performing application utilizing the latent heat of the steel material. CONSTITUTION:A steel material, e.g. mild or alloyed steel, mounted on a conveyer 6 is passed through a soldering oven 1 comprising a workpiece charging chamber 2, a preheating oven 3, a heating oven 4 and an in-oven cooling chamber 5. Hereon, a solder interposed in a pasty state at the joint of the steel material is melted by heating the steel material at 800-1,200 deg.C in the oven 4 to perform in-oven soldering. Thereafter, the steel material is in-oven cooled in the chamber 5 equipped with cooling pipes 502..., discharged in a discharging chamber 504 by opening a shutter 503 and then charged in an applicator device 7 at the downstream side of a communicating chamber 506 to perform application utilizing the latent heat of the steel material. Then, the coating film is baked in a baking oven 706 inside the device 7.