shielding gas


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shielding gas

[′shēld·iŋ ‚gas]
(metallurgy)
Gas, such as nitrogen, oxygen, and carbon dioxide, used in shielded arc welding to protect molten weld from contamination and damage by the atmosphere.
References in periodicals archive ?
Even a little draft on the arc will disturb the shielding gas and plasma gas and cause a reduction in bonding as well as rapid oxidation of the interface area.
Tenders Are Invited For Procurement Of Plc Based Shielding Gas Alternator With Flow Control Valve
Some systems burn flux to shield the arc and others use a bottle of shielding gas.
The torches are connected with cables to the power supply and with hoses to the shielding gas source and where used, the water supply.
ESAB says the sMIG ("smart MIG") function, enables users to begin MIG welding--with an extremely stable arc--simply by setting metal thickness and wire diameter and unlike competitive units, there is no need to enter information for shielding gas mix and both units can weld dual shielded flux cored wire up to 1.
It is found that in-process effects such as sample cleanness and shielding gas fluctuations have a minor influence on the process robustness.
It operates with a shielding gas mixture of 75-80% argon and a balance of CO2, and provides a tensile strength of 121 ksi (using a 75/25 shielding gas mixture).
The shielding gas has an important role in laser welding, fulfilling the following tasks: protection of molten pool and heat-affected zone from the effect of the surrounding atmosphere, affecting the shape of the weld and protection of the optics of the device against metal vapors and spatter droplets.
The powder is carried by a stream of inert shielding gas, which is blown coaxially through the laser beam.
Suban, "Dependence of Melting Rate in MIG/MAG Welding on the Type of Shielding Gas Used", Journal of Materials Processing Technology, vol.
The topics include the influence of relative distance between ledges on the stress-strain state of rock at a face, differential equations of processes for the hydropuls power mechanism of drill machines, the effect of diamond tool performance capability on the quality of a processed surface, calculating the gas-dynamic impact of the active shielding gas on the electrode metal drop in gas jet shielded welding, and assessing efficiency of cloud-based services by linear programming.
The Boeing Company has obtained a patent for a method for applying a silicon oxy-carbide coating onto a substrate comprised of the steps of introducing a shielding gas and a plasma-source gas to an atmospheric plasma device to generate an atmospheric plasma; introducing a cyclic organosiloxane precursor to the atmospheric plasma, the cyclic organosiloxane precursor being carried by a carrier gas; and while the cyclic organosiloxane precursor is being introduced to the atmospheric plasma, positioning the substrate relative to the atmospheric plasma device such that the atmospheric plasma deposits the silicon oxy-carbide coating onto the substrate.