The effect of metal transfer stability (spattering) on fume generation, morphology and composition in short-circuit MAG welding

The main objective of this work was to evaluate the hypothesis that the greater transfer stability leads also to less volume of fumes. Using an Ar + 25%CO2 blend as shielding gas and maintaining constant the average current, wire feed speed and welding speed, bead-on-plate welds were carried out with plain carbon steel solid wire. The welding voltage was scanned to progressively vary the transfer stability. Using two conditions of low stability and one with high stability, fume generation was evaluated by means of the AWS F1.2:2006 standard. The influence of these conditions on fume morphology and composition was also verified. A condition with greater transfer stability does not generate less fume quantity, despite the fact that this condition produces fewer spatters. Other factors such as short-circuit current, arcing time, droplet diameters and arc length are the likely governing factors, but in an interrelated way. Metal transfer stability does not influence either the composition or the size/morphology of fume particulates. (c) 2014 Elsevier B.V. All rights reserved.

Welding Equipment at the New York Trade School

Pictured is a P & H A.C. Arc Welder that would have been used to teach students in the Welding Department at the New York Trade School. Black and white photograph.

Direct support, general support, and depot maintenance repair parts and special tools lists : welding machine, arc, AC/DC, 300 amp, transformer rectifier, constant current, base mounted (Eutectic Corp. model MD301 FED), FSN 3431-235-4728.

"October 1971."

Organizational, DS, GS, and depot maintenance manual including repair parts : welding machine, arc, generator, electric motor driven, 300-amp DC arc, 220/440-V, 60-cycle, 3-phase, wheel mounted (Harnischfeger model W300 MG), FSN 3431-226-1569).

"April 1965."

Operator, organizational, direct support and general support maintenance manual : welding machine, ARC, AC/DC, 300 AMP, transformer rectifier, constant current, base mounted (Eutectic Corp. model MD301 FED) FSN 3431-235-4728.

Includes index.

Operator's, organizational direct support, general support and depot maintenance manual : welding set, arc, inert gas shielded, water cooled, aluminum welding, general purpose, (Airco model 2351 1209), FSN 3431-731-4163.

"June 1969."

Operator's manual : welding machine, ARC, generator, diesel driven, single operator, remote control, 300 AMP, DC ARC, skid MTD, 60 AMP 20 V MIN, 375 AMP AT 40 V MAX, current 115 V 3 KW auxiliary power (Libby model ODW-300) FSN 3431-894-1573.

"August 1962."

Operator, organizational, field, and depot maintenance manual : welding set, ARC, inert gas shielded, plastic or metal lined gun, for 3/64 in. wire, DC, 115V, (Linde model SWM-9-A) FSN 3431-972-7672.

Includes index.

Organizational maintenance repair parts and special tools lists : welding set, ARC, inert gas shielded, plastic or metal lined gun; for 3/64 in. wire; DC, 115V., (Linde model SWM-9-A) FSN 3431-972-7672.

"May 1970."

Organizational, direct and general support, and depot maintenance repair parts and special tools list : welding machine, ARC, G.E.D. generator, 300 amp, DC, constant current, consistant potential, skid mounted, (Libby welding model LTO 300), FSN 3431-253-0558.

"March 1971."

Organizational, DS, GS and depot maintenance repair parts and special tools list : welding set, ARC, inert gas shielded, air cooled, metal lined gun for 3/64 in. wire, (Westinghouse model SA-136), FSN 3431-121-5878.

"July 1971."

Operator, organizational, field, and depot maintenance manual : welding set, arc, inert gas shielded, plastic or metal lined gun, for 3/64 in. wire, DC, 115V (Westinghouse model SA-135), FSN 3431-879-9709.

"August 1962."

Organizational, maintenance repair parts, and special tools lists : welding machine, arc, generator, GED, 300 amp, DC (Libby welding models) (model LE-300) FSN 3431-810-9696, (model LEW-300) FSN 3431-991-2961, (model LEB-300) FSN 3431-072-0327.

"January 1971."

Organizational and direct support maintenance repair parts and special tools list : welding set, arc, inert gas shielded, water cooled, aluminum welding, general purpose (Airco model 23511209), FSN 3431-731-4163.

"December 1970."

Operator's, organizational, DS, and GS maintenance manual : welding set, arc, inert gas shielded, air cooled, metal lined gun for 3/64 in. wire (Westinghouse model SA-136), FSN 3431-121-5878.

"August 1969."