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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TL;DR: In this paper, the effect of hydrogen in argon as a shielding gas in arc welding of austenitic stainless steel was investigated and it was shown that hydrogen addition to argon changes the static characteristic of the welding arc.
84 citations
TL;DR: In this article, the cavitation erosion resistance of four alloys used to repair worn turbine by welding was tested in laboratory and the microstructure of the weld deposits was studied by Light Optical Microscopy (LOM), Scanning Electron microscopy (SEM) and X-Ray Diffraction (XRD), while the chemical composition was analyzed by Optical Emission (OES) and Energy Dispersive X-ray Spectrometry (EDXS).
83 citations
20 Nov 1990-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: The microstructure and high temperature stability of an iron-based hardfacing alloy of nominal composition Fe-30Cr-38C (weight per cent) deposited by manual metal arc welding has been investigated using microscopy, microanalysis, dilatometry and thermodynamic modelling as mentioned in this paper.
Abstract: The microstructure and high temperature stability of an iron-based hardfacing alloy of nominal composition Fe-30Cr-38C (weight per cent) deposited by manual metal arc welding has been investigated using microscopy, microanalysis, dilatometry and thermodynamic modelling In the as-deposited condition the undiluted alloy was confirmed to consist of a mixture of M 7 C 3 carbide and metastable austenite containing a high chromium concentration Since the properties of the alloy can depend on the stability of the austenite, annealing experiments were carried out to investigate the decomposition of the austenite into a mixture of ferrite and carbides The results demonstrate that at temperatures around 750 °C the austenite starts to decompose rapidly, beginning with the precipitation of M 23 C 6 carbides, although the final equilibrium phase mixture is simply chromium-depleted ferrite and M 7 C 3 The implications of these results are discussed with respect to the potential applications of the alloy
82 citations
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TL;DR: In this paper, the lowest arc voltage across the arc load is detected during a predetermined time period immediately preceding the onset of each current pulse, and the pulse repetition rate is controlled on the basis of this detected voltage so that the detected arc voltage becomes constant.
Abstract: A pulsed arc welding system includes a current pulse generating circuit and a background current generating circuit. The lowest arc voltage across the arc load is detected during a predetermined time period immediately preceeding the onset of each current pulse. The pulse repetition rate is controlled on the basis of this detected voltage so that the detected arc voltage becomes constant.
81 citations
TL;DR: In this article, different hardfacing layers were produced by shield manual arc welding (SMAW) process in which a bare electrode of H08A was coated with fluxes, to which different measures of ferrotitanium (Fe-Ti), ferrovanadium (FeV), ferromolybdenum (FeMo) and graphite had been added.
81 citations