Topic
Shielding gas
About: Shielding gas is a research topic. Over the lifetime, 6697 publications have been published within this topic receiving 58668 citations.
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TL;DR: In this article, the feasibility of dissimilar welding between AISI 304 stainless steel and carbon steel plates with the thickness of 15 mm was studied, and the processes applied in this work were gas tungsten arc welding and shield metal arc welding (SMAW).
Abstract: . This work studied the feasibility of dissimilar welding between AISI 304 stainless steel and AISI 1020 carbon steel plates with the thickness of 15 mm. The processes applied in this work were gas tungsten arc welding (GTAW) and shield metal arc welding (SMAW). Microstructure of weld metal produced by GTAW consists of delta ferrite network in austenite matrix, while the dendrite of delta ferrite finely distributed in austenite matrix was found in the weld produced by SMAW. Hardness values of weld metals produced using these two techniques were superior to those of stainless steel and carbon steel base metals respectively. Weld metals produced by these two processes were qualified under tension and bending. This was justified by the result that the failed part after transverse tensile test was on carbon steel, and no crack was found in weld metal after U-shape bending. Impact test exhibited higher toughness of weld metal produced by GTAW than that produced by SMAW. This might be from microstructure of the former weld as network of delta ferrite in austenite matrix which might help absorb impact energy. Pitting corrosion potential of weld metal produced by GTAW was higher than that produced by SMAW and stainless steel base metal respectively. In the aspect of mechanical and corrosion properties of the weld, GTAW was considered as a promising process that could be used for dissimilar welding between these two metals.
22 citations
TL;DR: In this paper, a back propagation artificial neural network (BPANN) was used to predict the level of diffusible hydrogen (HD) based on a variety of flux-cored arc welding (FCAW) parameters such as welding current, contact-tip to work piece distance (CTWD) and shielding gas type for single run, horizontal bead-on-plate steel welds using seamed and seamless rutile consumable wires.
22 citations
Patent•
26 Mar 2007
TL;DR: A welding apparatus of a stainless steel pipe comprises a welding torch jetting argon gas for shielding oxygen into a gap of the steel pipe rolled in a circular shape, while fusing any one of base metal and a welding material as mentioned in this paper.
Abstract: A welding apparatus of a stainless steel pipe comprises a welding torch jetting argon gas for shielding oxygen into a gap of the steel pipe rolled in a circular shape, while fusing any one of base metal and a welding material; and a gas supply pipe installed inside the steel pipe, the gas supply pipe having a jetting nozzle which jets argon gas at a rate of 4 to 20 l/min toward the inner surface of a welding bead portion, where welding has been already completed and which is positioned backwardly at a predetermined distance from a welding bead portion where welding is being performed by the welding torch.
22 citations
TL;DR: In this paper, the effect of repetitive TIG welding passes, melting and remelting the same material volume on microstructure and corrosion resistance of 2507 (EN 1.4410) su
Abstract: This is a study of the effect of repetitive TIG (tungsten inert gas) welding passes, melting and remelting the same material volume on microstructure and corrosion resistance of 2507 (EN 1.4410) su ...
22 citations
Patent•
05 Mar 1976
TL;DR: Nickel-chromium-silicon steel electrode for arc welding provides maraging stainless steel weld deposits having desirable strength, toughness and corrosion resistance in age-hardened condition.
Abstract: Nickel-chromium-silicon steel electrode for arc welding provides maraging stainless steel weld deposits having desirable strength, toughness and corrosion resistance in age-hardened condition. Electrode arc can be shielded with inert gas or with lime-cryolite-titania flux containing specially controlled proportions of manganese.
22 citations