A welding machine includes a welding power supply that generates a welding waveform during a welding operation, an internal combustion engine, and a generator that is operatively connected to the welding power supply to supply electrical energy to the welding power supply. The generator includes a rotor shaft driven by the internal combustion engine, and an end casting located at an end of the generator opposite the internal combustion engine. A rotary screw compressor is mounted to the end casting of the generator. A clutch mechanism couples the rotor shaft to the rotary screw compressor to selectively drive the rotary screw compressor by the rotor shaft.

Improved steel welds, article for making the same, and methods of making the same are provided. The present disclosure provides advantageous erosion, corrosion and/or cracking resistant weld metal. More particularly, the present disclosure provides high manganese (Mn) weld metal compositions having enhanced erosion, corrosion and/or cracking resistance, articles for the production of the high manganese weld metal compositions having enhanced erosion, corrosion, and/or cracking resistance, and methods for fabricating high manganese weld metal compositions having enhanced erosion, corrosion and/or cracking resistance.

A one-side submerged arc welding method includes joining two steel plates butted to each other by submerged arc welding from one side using a plurality of electrodes. During the submerged arc welding, at least one of the electrode distances between adjacent electrodes in a terminal end region of the steel plates is changed.

A one-side submerged arc welding method includes joining two steel plates butted to each other by submerged arc welding from one side using a plurality of electrodes. During the submerged arc welding, at least one of the electrode distances between adjacent electrodes in a terminal end region of the steel plates is changed.

The present application relates to an electric arc welding method to be used with an arc welding arrangement (1) comprising a first power source, a first electrode (2) connected to said first power source, and a second electrode (7), said first electrode (2) being adapted to generate a weld pool (28) via a first electric arc present within a first arc region (31) and said second electrode (7) being adapted to generate said weld pool via a second electric arc present within a second arc region. The first electrode (2) is operated at welding parameters adapted to maintain said first arc ignited. The second electrode (7) is operated at welding parameters adapted to ensure that excess energy from at least said first electrode (2) is required to maintain said second arc ignited. The method comprises the step of feeding said second electrode (7) so that it is allowed to consume excess energy from said first electrode (2) to maintain said second arc ignited. The invention also relates to an arc welding arrangement (1) for carrying out the method.

Cladding strip feeders having independent pressure rollers and strip cladding systems with cladding strip feeders having independent pressure rollers are disclosed. A disclosed example cladding strip feeder for a strip cladding system includes: a drive roller to advance a cladding strip along a strip feed path through contact plates; a first pressure roller positioned along the strip feed path opposite a first section of the drive roller; a second pressure roller positioned along the strip feed path opposite a second section of the drive roller; a third pressure roller positioned along the strip feed path opposite a third section of the drive roller; a first pressure adjuster to set a first pressure applied to the cladding strip by the first pressure roller and the first section of the drive roller; a second pressure adjuster to set a second pressure applied to the cladding strip by the second pressure roller and the second section of the drive roller; and a third pressure adjuster to set a third pressure applied to the cladding strip by the third pressure roller and the third section of the drive roller, the first pressure roller, the second pressure roller, and the third pressure roller being configured to apply symmetric pressure across a width of the cladding strip by selectively setting at least one of the second pressure adjuster to apply the second pressure or the third pressure adjuster to apply the third pressure based on the cladding strip having one of at least three incremental strip widths.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: between 0.4 and 1.0 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at ?20? F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: between 0.4 and 1.0 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at ?20? F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: between 0.4 and 1.0 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at ?20? F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: between 0.4 and 1.0 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at ?20? F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.