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.

Provided is a welded structural member with excellent stress corrosion cracking resistance, which includes: a 7000-series aluminum alloy material that has a chemical composition containing 6.6% by mass to 8.5% by mass of Zn, 1.0% by mass to 2.1% by mass of Mg, 0.10% by mass to 0.20% by mass of Zr, and 0.001% by mass to 0.05% by mass of Ti, with a remainder including Al and unavoidable impurities, and includes a metallographic structure that is a fibrous structure; and other aluminum alloy material welded with the 7000-series aluminum alloy material. In this welded structural member, when an electrical conductivity of the 7000-series aluminum alloy material before an artificial aging treatment is defined as X % IACS and the electrical conductivity of the 7000-series aluminum alloy material after the artificial aging treatment is defined as Y % IACS, the following equation is satisfied: 0.120≤(Y/X−1)≤0.250 is satisfied, and a difference in the electrical conductivity of the 7000-series aluminum alloy material between a mother portion other than a weld heat-affected zone and the weld heat-affected zone is 5% IACS or less.

A method for determining the cooling rate of a weld, comprising locating at least one non-consumable thermal sensor at a predetermined location from a weld pool generated during an active welding process, wherein the thermal sensor is located within the same plane of travel as a welding device creating the weld pool; determining the travel speed of the welding device; using the at least one non-consumable thermal sensor to gather temperature data from the weld pool; and determining the time interval between when the weld pool has a first measured temperature and when the weld pool has a second measured temperature that is less than the first measured temperature, wherein the determined time interval represents the cooling rate of the weld.

A pulsed welding regime includes a peak phase in which energy is added to an electrode and a weld puddle, and a molten ball begins to detach from the electrode, followed by a dabbing phase in which current is significantly reduced to place the ball in the weld puddle with addition of little or no energy. The resulting short circuit clears and the system proceeds to a background phase. The current in the dabbing phase is lower than the current during the background phase. The process may be specifically adapted for particular welding wires, and may be particularly well suited for use with cored wires. The dabbing phase allows for lower energy to be transferred to the sheath of such wires, and resets the arc length after each pulse cycle.

A pulsed welding regime includes a peak phase in which energy is added to an electrode and a weld puddle, and a molten ball begins to detach from the electrode, followed by a dabbing phase in which current is significantly reduced to place the ball in the weld puddle with addition of little or no energy. The resulting short circuit clears and the system proceeds to a background phase. The current in the dabbing phase is lower than the current during the background phase. The process may be specifically adapted for particular welding wires, and may be particularly well suited for use with cored wires. The dabbing phase allows for lower energy to be transferred to the sheath of such wires, and resets the arc length after each pulse cycle.

According to one aspect of the present invention, there is provided a T-joint including a first steel sheet, a second steel sheet, and a fillet welded part, in which the sheet thickness of the second steel sheet is 6.0 mm or less, the second steel sheet is stood on a first surface of the first steel sheet, the fillet welded part joins the first surface of the first steel sheet and a first surface of the second steel sheet to each other, at least one of the first surface of the first steel sheet or the first surface of the second steel sheet includes a zinc-based plating, an abutting end portion of the second steel sheet on a second surface side of the second steel sheet has an inclined surface, and in a cross section taken along a sheet thickness direction of the first steel sheet and a sheet thickness direction of the second steel sheet, the inclined surface forms an acute angle with respect to the first surface of the first steel sheet.

A gas shield arc welding method that reduces the number of joints, which are the sites where defects occur more readily, and that enables automatic welding with a welding robot. A gas shield arc welding method in which a steel pipe Wo is welded by multi-pass welding with a steel frame erection adjusting tool attached to an erection piece on the steel pipe Wo to immobilize an open end section of the steel pipe. An initial single or several layers are welded to the open end section, after welding, the steel frame erection adjusting tool is removed; and remaining layers are welded with a welding robot such that two bead joints are formed at no more than two sites.

An example weld training system includes: a weld training device configured to perform a simulated welding procedure on a simulated weld joint; a work surface comprising the simulated weld joint; a sensing device configured to track weld training device location information during the simulated welding procedure; a visual interface configured to display results of the simulated welding procedure based on the weld training device location information; and an enclosure comprising an interior volume configured to house within its interior the visual interface, the work surface, and the sensing device.

An example weld training system includes: a weld training device configured to perform a simulated welding procedure on a simulated weld joint; a work surface comprising the simulated weld joint; a sensing device configured to track weld training device location information during the simulated welding procedure; a visual interface configured to display results of the simulated welding procedure based on the weld training device location information; and an enclosure comprising an interior volume configured to house within its interior the visual interface, the work surface, and the sensing device.

Some examples of the present disclosure relate to welding torches having a thermal insulating plate (400). The thermal insulating plate is comprised of a thermally insulating material, and is positioned between a front housing (302) and a drive gearbox (324) of the welding torch. The front housing (302) is connected to a gooseneck that conducts electrical energy to a torch tip (i.e. front end) of the welding torch. The drive gearbox (324) includes a gear assembly configured to drive a drive roll that moves a wire electrode through the welding torch (e.g. toward the torch tip of the torch). The thermal insulating plate (400) acts as a heat dam to decrease and/or reduce thermal energy transfer from the torch tip of the welding torch (e.g. via the front housing) towards the rear of the welding torch (e.g. through the drive gearbox), where the thermal energy may heat the welding torch handle and/or damage some of the more expensive and/or sensitive components in the handle (e.g. a motor of the drive gearbox).