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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.


Papers
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Journal ArticleDOI
TL;DR: In this article, the influence of iron oxide flux and O2-Ar mixed shielding gas on weld shape and penetration in gas tungsten arc welding was investigated by bead-on-plate welding on SUS 304 stainless with low oxygen and low sulphur contents.
Abstract: The influence of iron oxide flux and O2–Ar mixed shielding gas on weld shape and penetration in gas tungsten arc welding is investigated by bead-on-plate welding on SUS 304 stainless with low oxygen and low sulphur contents. The oxygen content in the weld metal is measured using a HORIBA EMGA-520 oxygen/nitrogen analyzer. The results show that both the iron oxide flux and the O2–Ar mixed shielding gas can significantly modify the weld shape from shallow wide to deep narrow. A large weld depth/width ratio around of 0.5 is obtained when the oxygen content in the shielding gas is in the range of 3000–6000 vol. ppm. Oxygen over a certain critical value, i.e. 70 wt. ppm, in the weld pool alters the temperature coefficient of the surface tension on the pool surface, and hence changes the Marangoni convection. A thick oxide layer on the weld pool surface is generated when the oxygen content in the shielding gas is over 6000 vol. ppm, which becomes a barrier for the oxygen conveyance to the liquid pool an...

20 citations

Patent
27 Jun 1950

20 citations

Journal ArticleDOI
TL;DR: In this paper, the relation between temperature and emissivity of the weld pool is determined using optical emission spectroscopy in the spectral region between 660 and 840 nm and absolute calibrated high-speed camera images.
Abstract: The temperature determination of liquid metals is difficult and depends strongly on the emissivity. However, the surface temperature distribution of the weld pool is an important characteristic of an arc weld process. As an example, short-arc welding of steel with a cold metal transfer (CMT) process is considered. With optical emission spectroscopy in the spectral region between 660 and 840 nm and absolute calibrated high-speed camera images the relation between temperature and emissivity of the weld pool is determined. This method is used to obtain two-dimensional temperature profiles in the pictures. Results are presented for welding materials (wire G3Si1 on base material S235) using different welding CMT processes with CO2 (100%), Corgon 18 (18% CO2 + 82% Ar), VarigonH6 (93.5% Ar + 6.5% H2) and He (100%) as shielding gases. The different gases are used to study their influence on the weld pool temperature.

20 citations

Journal ArticleDOI
TL;DR: In this article, four different rare earth (RE) additive iron-based hardfacing alloys were prepared by the shielded metal arc welding process with pre-placement technique and the objective was to examine the effect of dry sliding wear parameters and to develop a statistical regression model using full factorial approach.

20 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202368
2022108
202192
2020109
201979
2018111