Kawasaki Steel Corporation

Noboru Nishiyama

Kazuo Agusa

Shosaburo Nakano

Hiroaki Sasaki

Tadao Komatsu

Tadashi Nakajima

Shozaburo Nakano

Akio Kamada

Junya Matsuyama

Takaro Matsumoto

Katsuaki Nakatsuji

Toshiharu Hiro

Masaaki Kosho

Takeharu Ishikawa

Junji Tateishi

Syozaburo Nakano

Kouki Sato

In lap joint welding of galvanized sheets, the occurence of blowhole and pit is prevented by applying a blowhole.multidot.pit preventing agent comprising a phosphorus compound as an effective ingredient prior to the arc-welding.

Blowhole.multidot.pit preventing agent and arc-welding method using the

A covered arc welding electrode includes a steel core wire and a flux which is applied to the outside periphery of said steel core wire. The welding electrode can form a superior crack-resisting weld zone even if fluctuating stresses are continually applied to a base metal while the base metal is welded. The flux includes 40 to 60% metal carbonate, 10 to 25% metal fluoride and 4 to 25 metal oxide by weight. The flux comprises 24 to 32% of the total weight of said electrode. The composition of the welding electrode includes 0.005 to 0.05% carbon, 0.1 to 1.1% silicon, 1.5 to 2.5% manganese, not more than 0.007% sulfur and not more than 0.25% nickel by weight and the manganese/sulfur ratio is more than or equal to 350 to 1. In addition, the welding electrode can include 0.01 to 0.10% rare earth metal by weight. In which case, the Mn content may be 1.0 to 2.5% by weight and the manganese/sulfur ratio may be more than or equal to 270 to 1. In addition, the composition of the welding electrode can include titanium and zirconium, the total content of which may be less than or equal to 1.2% the total weight of the electrode, and/or aluminum and magnesium, the total content of which may be less than or equal to 1.2% of the total weight of the electrode.

Covered arc-welding electrode

Overlay welding method

Welding process using laser beam

A flux composition suitable for electro-slag over-lay welding a stainless steel on a circumferential inner surface of a cylindrical vessel with a strip electrode under controlling a flow of molten slag and metal with an outer electro-magnetic field, which contains 50-60% by weight of CaF.sub.2, 10-20% by weight of SiO.sub.2, 5-25% by weight of CaO and 10-30% by weight of Al.sub.2 O.sub.3 in a ratio of SiO.sub.2 /CaF.sub.2 of at least 0.20 and a ratio of CaO/SiO.sub.2 of at least 0.50.

Flux composition for electro-slag over-lay welding of a cylindrical

This disclosure relates to MIG welding. In order to obtain an instantaneous short circuit type of metal transfer in the process using only a pure inert gas shield a small amount of rare earth elements is added to the weld wire. The amount of rare earth added is between 0.02%-0.03% by weight of the wire.

MIG Arc welding method

Surfacing is conducted with horizontal electro-slag welding by using a strip electrode, and by applying a magnetic field, having component perpendicular to a base metal, to a molten metal and slag pool to control the flow of the molten pool.

Horizontal electro-slag welding process for surfacing

Growing community of inventors

Ichihara, Japan

Noboru Nishiyama