A consumable electrode arc welding method using a shielding gas containing argon comprises: setting a first welding condition in which a first welding current is supplied to a welding wire; and setting a second welding condition in which a second welding current is supplied to a welding wire. The first welding condition and the second welding condition are welding conditions in which a reference current of the welding current is 350 A or higher and a current variation range is from 50 A to 150 A, and the first welding condition and the second welding condition are switched at a cycle of a frequency ranging from 1 Hz to 5 Hz.

Provided is an apparatus for coating a girth weld and a cutback region surrounding said girth weld, said apparatus having lateral travel at least equal to the length of the cutback region and circumferential rotational travel around the pipe. The apparatus can provide a multiple component coating accurately and safely, without the need for solvent flushing of the apparatus.

A welding method includes providing a first connector having a first end, providing a second connector having a second end for being welded to the first end, overlapping the first end and the second end, applying a contactless heating to a central section of the first end and melting an end section of the first end facing the second connector, and cooling the first end and the second end to form a weld connecting the first connector and the second connector. The first connector and the second connector extend in opposite directions from the weld.

A method of forming a sealed canister and a method of storing radioactive materials is provided. The method of forming includes placing a top plate on a top opening of a side wall, a bottom of the side wall being sealed to a base plate. The top plate includes a top surface with a top edge having a bevel and with a channel set in from the top edge. Finally, a weld is formed between the beveled top edge and the top opening of the side wall to seal the top plate to the side wall.

A hardfacing metal composition and method of restoring worn work string tubing by application of a hardfacing metal to the worn regions of the work string tubing.

Disclosed is a different-strength steel welding component with an aluminum or aluminum-alloy plating formed by means of butt welding of a high-strength steel plate and a low-strength steel plate, and each of the high-strength steel plate and the low-strength steel plate comprises a base body and at least one pure aluminum or aluminum-alloy plating on a surface of the base body. The tensile strength of a welding seam of the welding component after hot stamping is greater than the tensile strength of a low-strength steel base metal, and the elongation is greater than 4%, such that application requirements of the welding component in the field of automobile hot stamping are met. The present disclosure also relates to a method for manufacturing a different-strength steel welding component with an aluminum or aluminum-alloy plating and a welding wire used in the method.

An automobile undercarriage part of the present invention has a welded joint formed by base steel plate, wherein the chemical composition of a weld metal contains, with respect to a total mass of the weld metal, by mass %, C: 0.02% to 0.30%, Si: 0.10% to less than 1.0%, Mn: 1.2% to 3.0%, Al: 0.002% to 0.30%, Ti: 0.005% to 0.30%, P: more than 0% to 0.015%, and S: more than 0% to 0.030%, the following formula (1A), formula (1B), formula (2), and formula (3) are satisfied, and slag in a toe portion of the fillet weld satisfies a formula (4).

[Al]+[Ti]>0.05  Formula (1A)

[Ti]/[Al]>0.9  Formula(1B)

7×[Si]+7×[Mn]−112×[Ti]−30×[Al]≤12  Formula (2)

2.0<[Si]+[Mn]  Formula (3)

[Ti content on slag surface]>[Si content on slag surface]  Formula (4).

Embodiments of systems and methods of additive manufacturing are disclosed. In one embodiment, a computer control apparatus accesses multiple planned build patterns corresponding to multiple build layers of a three-dimensional (3D) part to be additively manufactured. A metal deposition apparatus deposits metal material to form at least a portion of a build layer of the 3D part. The metal material is deposited as a beaded weave pattern, based on a planned path of a planned build pattern, under control of the computer control apparatus. A weave width, a weave frequency, and a weave dwell of the beaded weave pattern may be dynamically adjusted during deposition of the beaded weave pattern. The adjustments are under control of the computer control apparatus based on the planned build pattern, as a width of the build layer varies along a length dimension of the build layer.

A method of joining a steel first member to a stainless steel second member includes buttering a first joint surface on the first member, the buttering including: preheating the first joint surface; welding a border layer of weld material to the first joint surface; and heat treating the border layer and the first joint surface after welding the border layer. A weld is formed between the first and second members after heat treating the border layer and the first joint surface. The border layer and a second joint surface on the second member are preheated; and a body of weld material is added between the border layer and the second joint surface.

A concrete wall frame assembly and a method of manufacturing same is disclosed. The assembly includes two generally parallel metal plates and at least one rod extending between a first end and a second end. A first end of the rod is passed through a hole in the second plate toward the first plate until the first end engages a continuous inner surface of the first plate. The second end of the rod protrudes through the hole and extends past an outer surface of the second plate. A stud welder is connected to the either the second, protruding end of the rod, or connected to the rod between the two metal plates to stud weld the first rod end to the inner surface of the first plate. The second end of the rod is then arc welded to the second metal plate at the outer surface.