Variations-
Metal
Transfer
Introduction
Equipment
Description
Short Arc
Welding
Power
Supply
Shielding
Gases
Globular
Transfer
Spray Arc
Welding
Cored Wire
Welding
Wire
Electrodes
Safety
Welding
Techniques
Welding
Conditions
Economics
Weld
Defects
Mig Spot
Welding
Tables

 

6 Globular Transfer As the welding current and voltage are increased above the maximum recommended for short arc welding, metal transfer will begin to take on a different appearance. This welding technique is commonly known as globular transfer, with metal transferring through the arc. Usually, the drops of molten metal have a greater diameter than the wire itself. This mode of metal transfer can be erratic, with spatter and occasional short circuiting being common. Table 1-2 – Minimum Current for Spray Arc Welding WIRE ELECTRODE DIAMETER MINIMUM WIRE  ELECTRODE SHIELDING SPRAY ARC TYPE IN. mm GAS CURRENT (AMP) MILD STEEL .030 .76 98% ARGON-2% OXY 150 MILD STEEL .035 .89 98% ARGON-2% OXY 165 MILD STEEL .045 1.1 98% ARGON-2% OXY 220 MILD STEEL .052 1.3 98% ARGON-2% OXY 240 MILD STEEL .062 1.6
98% ARGON-2% OXY
275 STAINLESS STEEL .035 .89 99% ARGON-1% OXY 170 STAINLESS STEEL .045 1.1 99% ARGON-1% OXY 225 STAINLESS STEEL .062 1.6 99% ARGON-1% OXY 285 ALUMI NUM .030 .76 ARGON 95 ALUMIN UM .046 1.19 ARGON 135 ALUMINUM .062 1.6 ARGON 180 DEOXI DIZED COPPER .035 .89 ARGON 180 DEOXIDIZED COPPER .045 1.1 ARGON 210 DEOXIDIZED COPPER .062 1.6 ARGON 310 SILICON BRONZE .035 .89 ARGON 165 SILICON BRONZE .045 1.1 ARGON 205 SILICON BRONZ E .062 1.6 ARGON 270