MANUFACTURING METHOD OF TIG WELDED STAINLESS STEEL PIPE, TIG WELDED STAINLESS STEEL PIPE, AND TIG WELDED STAINLESS MEMBER

• Main Authors: NOBUTOKI TOMOKAZU, ASADA HIROSHI, NAKAKO TAKEFUMI
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2017
• Subjects: ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a manufacturing method of a TIG welded stainless steel pipe capable of suppressing generation of a weld defect without contaminating Hinto shield gas.SOLUTION: In a manufacturing method of a TIG welded stainless steel pipe for manufacturing a welded stainless steel pipe by bending a stainless steel strip, and by butting and TIG welding both marginal parts, a pulse waveform having a pulse frequency of 40 Hz-300 Hz is used as a current waveform in a welding power source.SELECTED DRAWING: Figure 2 【課題】シールドガスにＨ２を混入させることなく、溶接欠陥の発生を抑制することができるＴＩＧ溶接ステンレス鋼管の製造方法を提供する。【解決手段】ステンレス鋼帯を幅方向に曲げ加工し、両縁部を突合せてＴＩＧ溶接することにより溶接ステンレス鋼管を製造するＴＩＧ溶接ステンレス鋼管の製造方法であって、溶接電源における電流波形としてパルス周波数４０Ｈｚ〜３００Ｈｚのパルス波形を用いる。【選択図】図２