A cored electrode to form a weld bead with little or no gas tracking. The cored electrode includes a metal sheath and a fill composition. The filling composition includes a slag forming agent and at least one fluorine containing compound.

Flux cored electrode with fluorine

PROBLEM TO BE SOLVED: To provide an arc welding method, an arc welding robot control device and an arc welding system capable of forming a more beautiful bead SOLUTION: The arc welding method comprises a unit welding step including a step of executing the droplet transfer by generating the arc, and a step of cooling a molten pool formed in a welding base material while generating the arc, and repeats the unit welding step, and further comprises a step of changing step by step the welding condition values which are regulated in each unit welding step, and reflected in the molten state of a consumable electrode or a molten state of the welding base material, such as the time T1 for executing the step of the droplet transfer Thus, the optimum welding condition values can be determined even if the temperature of the base material is changed Therefore, the molten state of the consumable electrode or the molten state of the base material can be optimized As a result, the appearance of a bead to be formed can be improved COPYRIGHT: (C)2011,JPO&INPIT

Arc welding method

This flux-containing wire for welding ultrahigh-tensile steel comprises, in said wire, at least one of CaF2, BaF2, SrF2, and MgF2, and, when the total content thereof is α, said α is greater than 2.0 to 8.0 mass% with respect to the total mass of the wire. The flux-containing wire also contains at least one type of Ti oxide, Si oxide, Mg oxide, and Al oxide, and when the total content thereof is β, said β is from 0.01 to 1.20 mass% with respect to the total mass of the wire. The ratio of the CaF2 content to said α is 0.50 or greater. The ratio of said α to said β is from 2.0 to 800.0 inclusive. Ceq as defined by equation (a) is from 0.60 to 1.20%. Ceq=[C]+[Si]/24+[Mn]/6+[Ni]/40+[Cr]/5+[Mo]/4+[V]/14…(a)

Flux-containing wire for welding ultrahigh-tensile steel

Various slag systems exhibiting improved flow characteristics and weld puddle properties are provided Also provided are flux cored electrodes for producing the noted slag systems and related methods of arc welding

Barium and lithium ratio for flux cored electrode

PROBLEM TO BE SOLVED: To provide a flux-cored wire which can provide a weld metal having excellent low-temperature toughness, has high welding execution efficiency, and enables omission or simplification of preheating executed for suppressing cold cracksSOLUTION: A flux-cored wire contains one or two or more kinds of CaF, BaF, SrF, MgF, and LiF When a total amount of their contents is α, the α is 20 to 70% by mass% to the total mass of the flux-cored wire and contains one or two or more kinds of Ti oxide, Si oxide, Mg oxide, Al oxide, Zr oxide and Ca oxide When a total amount of their contents is β, the β is 02 to 09% by mass% to the total mass of the flux-cored wire Ratio of the CaFcontent to the α is 090 or more, and ratio of the α to the β is 30 or more and 150 or lessSELECTED DRAWING: None

Flux-cored wire for gas shield arc welding

PURPOSE: To improve productivity and weldability by filling the flux having constant apparent density and weight ratio for the total wire weight and contg the CaF 2 , BaF 2 , etc of specified grain size to the hollow part surrounded by a steel made outer sheath CONSTITUTION: The outer sheath is composed of the steel contg ≤006% C, ≤00095% P, ≤0004% N The flux in a granular shape composed of 3W12% one or ≥two kinds of CaF 2 , BaF 2 whose apparent density is ≥13g/cm 2 for the total wire weight, 02W5% one or ≥two kinds of an iron oxide whose grain range body in 74μW350μ is ≥50%, 05W3% Al, 05W10% Mg, 01W2% Mn and 05W10% one or ≥two kinds of the iron powder contg Fe of an alloy iron and alloy material, and ≥14kg/cm 2 the apparent density of the blended total flux is filled up to the hollow part surrounded by the outer sheath at 10W30% for the wire total weight The productivity is thus improved and the mechanical property of the weld zone can be improved COPYRIGHT: (C)1989,JPO&Japio

Flux cored wire for self-shielded arc welding

PROBLEM TO BE SOLVED: To provide a flux-containing wire for gas shield arc welding capable of obtained weld metal having good welding operability and excellent low temperature toughness even in the case gaseous CO2 is particularly used as shield gas in a CaF2 series flux-containing wire. SOLUTION: In this flux-containing wire for gas shield arc welding, the inside of the outer surface made of steel is filled with flux containing CaF2 of 1.0 to 5.0%, one or two kinds of the multiple oxide of alkali metal and/or alkaline-earth metal and Ti and the multiple oxide of alkali metal and/or alkaline-earth metal, Ti and Si (hereinafter referred generically as alkali TiO2 multiple oxide) of 0.3 to 3.5% and TiO2 of 0.5 to 3.0% (inclusive of the value expressed in terms of TiO2 of Ti in the alkali TiO2 multiple oxide), to the total weight of the wire, and, in the flux-containing wire, CaF2/ alkali TiO2 multiple oxide=1.0 to 5.0, and CaF2/TiO2=1.0 to 5.0 are satisfied, moreover, the total content of hydrogen in the wire is 90 ppm or less, and furthermore, carbonate is contained in 2% or less.

武夫足立

Papers

Flux cored wire for self-shielded arc welding

Flux-containing wire for gas shield arc welding

武夫 足立

Papers

Flux cored wire for self-shielded arc welding

Flux-containing wire for gas shield arc welding

武夫足立