Kabushiki Kaisha Kobe Seiko Sho

Tsuyoshi Kurokawa

Fusaki Koshiishi

Hiroyuki Shimizu

Tsuneshi Ogawa

Toshiharu Maruyama

Yutaka Nishikawa

Isao Aida

Takaaki Ito

Ken Yamashita

Kazuhiko Ito

Yoshiya Sakai

Yasuyuki Yokota

Kazuo Ikemoto

Tetsuo Suga

Koichi Hosoi

Shigeo Nagaoka

Tetsuya Hashimoto

Hajime Uchiyama

A plating-free solid wire for arc welding has pits opening on its circumference, and wider inside than at each opening, and/or pits having a portion non-irradiated with an externally incoming light. A sulfide and a polyisobutene-containing oil are present in the pits and/or on the wire surface, the latter being present in an amount of 0.1-2 g/10 kg of wire. Twenty or more pits are present in total per and along wire circumference. The effective pit length ratio is 0.5% inclusive-50% exclusive. 0.1-2 g of the oil is present per 10 kg of wire. 0.01-0.5 g/10 kg of 0.1-10-&mgr;m-particle-dia MoS is present in &ldquo;bottleneck-like and/or cave-like pits&rdquo;, on the wire surface or immediately under the wire surface. A 2-10 mass ppm/total wire mass of K compound in K is present in the pits and/or on the wire surface. These ensure good feedability and lubricating properties, and less spatters.

Plating-free solid wire for MAG welding

Realized is a welding wire containing flux used for a gas shielded arc welding of a direct current/positive polarity mode, with use of which a quantity of sputter generated is small, a good weldability is realized and a weld metal with an excellent toughness is obtained in all the welding positions under application of a welding current in the range of a low current to a medium current, or in a definite manner in the range of 50 to 300 A. The flux contains 0.7 to 3 wt % Al, 0.1 to 1.0 wt % Mg and 1.2 to 5 wt % BaF , each content being a value in wt % to a total weight of the wire and the sum of a content of Al plus a content of Mg multiplied by 3 being in the range of 1.3 to 5 wt %, a filling ratio of the flux to the total weight of the wire is in the range of 5 to 30 wt %, a total Mn content in a steel sheath and the flux combined is in the range of 0.2 to 1.9 wt % and a total Si content in the steel sheath and the flux combined in the range of 0.001 to 0.9 wt %.

Gas shielded arc welding flux cored wire

Described is a solid wire for MAG welding which has no copper plating on the wire surface and which has good welding workabilities such as a reduced amount of generated spatters and good arc stability in the MAG welding of steel sheets. A solid wire for MAG welding comprises, as chemical components for the wire, 0.01 to 0.15 wt % of C, 0.20 to 1.00 wt % of Si, 0.70 to 1.70 wt % of Mn, 0.30 wt % or below of Ti, 0.025 wt % or below of S, 0.020 wt % or below of O, and the balance being Fe and inevitable impurities, wherein said wire is applied on the surface thereof with at least one compound serving as an arc stabilizer and selected from the group consisting of a K compound and a Cs compound in such a way that when an amount of the K compound to be applied to (calculated as K) is taken as Appm relative to the weight of said wire and an amount of the Cs compound (calculated as Cs) is taken as Bppm, a value of (A+3B) is in the range of 2 to 15 ppm. The wire has such a structure as not to be plated with copper on the surface thereof.

Solid wire for mag welding

Described is a flux cored wire for stainless steel which comprises a metal covering and flux filled inside of the metal covering. In the flux cored wire for stainless steel, the flux contains a slag forming agent in an amount of 6.0 wt. % to 13.0 wt. % based on the total weight of the wire and the metal covering is formed of an austenite-base stainless steel containing 0.003 wt. % to 0.090 wt. % of O, 0.0005 wt. % to 0.02 wt. % of S, 0.1 wt. % to 0.6 wt. % of Si and 0.005 wt. % to 0.2 wt. % of V, each based on the total weight of the metal covering.

Flux cored wire for stainless steel

Disclosed is a flux-cored wire for gas shield arc welding comprising a mild steel sheath and a flux composition filled in the mild steel sheath, wherein the mild steel sheath is made of a mild steel containing, based on the total weight of the sheath, 0.02% or less of C, 0.01 to 0.20% of Ti, and 0.01 to 0.15% of Al, the contents of Ti and C satisfying a relation of (Ti/C.gtoreq.1.0) and the contents of Al and C satisfying a relation of (Al/C.gtoreq.1.5); and the flux composition contains, based on the weight of the total wire, 0.50 to 3.60% of Mn (including the Mn amount in the sheath), and 0.10 to 1.80% of Si (including the Si amount in the sheath).

Flux-cored wire for gas shield arc welding with low fume

Described herein is a flux cored wire for use in stainless steel welding, the wire having a flux filled In a stainless steel sheath, the flux containing, on the basis of the total weight of the wire, 4.7-8.5% of TiO.sub.2, 0.5-3.5% of Al.sub.2 O.sub.3 and 0.6-3.0% of SiO.sub.2 and/or ZrO.sub.2 in proportions satisfying the following formula

Flux containing wire for use in stainless steel welding

Described herein is a flux containing wire for use in stainless steel welding, the wire having a flux filled in a stainless steel sheath, the flux containing, on the basis of the total weight of the wire, 4.7-8.5% of TiO.sub.2, 0.5-3.5% of Al.sub.2 O.sub.3 and 0.6-3.0% of SiO.sub.2 and/or ZrO.sub.2 in proportions satisfying the following formula

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Fujisawa, Japan

Tsuyoshi Kurokawa