WELDING METHOD OF FERRITIC STAINLESS STEEL FOR EXCELLENT FORMABILITY OF WELDING PART

A welding method of ferritic stainless steel for improving formability of welded parts is provided to obtain fine grains of the welded parts at low cost by coating MgO and CaO powder along a seam before welding. A welding method of ferritic stainless steel for improving formability of welded parts c...

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Hauptverfasser:	WOO, IN SU, KIM, JEONG KIL, NOH, BYUNG DOO
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Zusammenfassung:	A welding method of ferritic stainless steel for improving formability of welded parts is provided to obtain fine grains of the welded parts at low cost by coating MgO and CaO powder along a seam before welding. A welding method of ferritic stainless steel for improving formability of welded parts comprises a step of manufacturing a mixture of MgO powder, CaO powder, or MgO and CaO powder, a step of coating a seam with the mixture(15) before welding, and a step of TIG(Tungsten Inert Gas)-welding the coated seam. The particle size of the MgO powder is 180~500mum, and that of the CaO powder is 130~500mum. The mixture is obtained by mixing MgO powder, CaO powder, or MgO and CaO powder of 0.1~5wt% into glycerin solvent 100wt%.