Topic
Shielded metal arc welding
About: Shielded metal arc welding is a research topic. Over the lifetime, 4462 publications have been published within this topic receiving 40560 citations. The topic is also known as: manual metal arc welding & flux shielded arc welding.
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Journal Article•
TL;DR: In this article, the effect of arc constriction on weld penetration of alternative current welding is studied. And the relationship between slag contribution and weld penetration is studied by adding aluminum powder into AF305 to change this distribution.
Abstract: Weld penetration of A-TIG welding reaches above 3 times that of conventional TIG welding for aluminum alloy when multi-component flux AF305 is used as surface activating flux. A-TIG welding with AC, DCEN and DCEP mode are carried out. It is found that, flux has different effects on weld penetration when arc polarity is different. Effect of compelled arc constriction on weld penetration of alternative current welding is studied. It is believed that, constriction of whole arc root is not the main mechanism of AF305 dramatically improving weld penetration, it has relation with separate distribution of slag on weld surface. Then SEM observation and EDS analysis of slag are carried out respectively. Separate distribution of slag on welding pool during welding and great constriction of arc spots are confirmed by TIG welding with helium shielding gas. Relation between slag contribution and weld penetration is studied by adding aluminum powder into AF305 to change this distribution. It is believed that, during welding, separate distribution of slag on welding pool results in great constriction of arc spots, increases of arc spot force and Lorentz force within the arc and welding pool, in the end, increase of weld penetration.
17 citations
TL;DR: In this paper, the authors compare the defects instigated by welded-Joint and mechanical behaviors such as tensile testing, bending, hardness, and impact test under various loads and conditions performing on work specimen in destructive testing.
17 citations
Patent•
04 Jul 1985TL;DR: The gas metal arc welding process of the present invention extends the axial spray metal transfer range with a non rotating arc from 10 to 25 Ibs/hr using an electrode wire diameter between.035 to.052 inches as discussed by the authors.
Abstract: The gas metal arc welding process of the present invention extends the axial spray metal transfer range with a non rotating arc from 10 to 25 Ibs/hr using an electrode wire diameter between .035 to .052 inches. The process is carried out by maintaining an electrode extension of between 3/4 to 1 1/4 inches with a three component shielding gas mixture consisting essentially of argon and oxygen in combination with carbon dioxide or carbon monoxide in a volume proportion of oxygen 1-2%, carbon dioxide 8-15%, balance argon. The arc voltage is maintained in a range of between 29 and 40 volts.
17 citations
Patent•
01 Feb 2008TL;DR: In this paper, a high-strength Cr-Mo steel formed by shielded metal arc welding has been shown to contain precipitated Cr in a Cr content below 0.3% by mass, and precipitated Nb in a Nb content of 0.005% or above.
Abstract: A weld metal of a high-strength Cr—Mo steel formed by shielded metal arc welding contains: 0.04 to 0.10% by mass C, 0.15 to 0.5% by mass Si, 0.5 to 1.0% by mass Mn, 2.00 to 3.25% by mass Cr, 0.9 to 1.2% by mass Mo, 0.01 to 0.03% by mass Nb, 0.2 to 0.7% by mass V, 0.003% by mass or below and above 0% by mass B, 0.02 to 0.05% by mass O, and the balance of Fe and inevitable impurities. A residual extracted by electrolytic extraction from only an unaffected zone of the weld metal contains precipitated Cr in a Cr content below 0.3% by mass, and precipitated Nb in a Nb content of 0.005% by mass or above.
17 citations