CURVED SURFACE WELD OVERLAY METHOD AND LANCE MANUFACTURING METHOD EMPLOYING SAME

A curved surface weld overlay method comprises: a first step of tack welding either steel or stainless steel netting material (29 31) in weld regions which are formed in the outer side of a bent portion (16) in the radial direction at the inner part of an inner pipe (14) of a lance which is formed i...

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Bibliographische Detailangaben
Hauptverfasser:	HIRATA JUN, TSUKAMOTO SHINGO, IKEGAMI HIROFUMI, YAMASHITA MASAHIDE, ENOKIDO HIROFUMI
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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Beschreibung
Zusammenfassung:	A curved surface weld overlay method comprises: a first step of tack welding either steel or stainless steel netting material (29 31) in weld regions which are formed in the outer side of a bent portion (16) in the radial direction at the inner part of an inner pipe (14) of a lance which is formed in whole or in part from a curved surface; and a second step of carrying out an overlay weld with a metal having heat and abrasion resistance upon the netting material (29 31) and forming overlays (19 21) in the weld regions. It is thus possible to smoothly carry out on an inner side surface of a steel structure having a curved surface (for example a pipe having a bent portion) an overlay weld with a metal having heat and abrasion resistance.