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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Patent•
12 Jul 2007TL;DR: In this paper, a process for laser welding at least one metal workpiece by a laser beam was described, the workpiece having a surface coating containing aluminum, characterized in that the laser beam (3 ) is combined with a electric arc (4 ) so as to melt the metal and actually weld the work piece(s).
Abstract: Process for laser welding at least one metal workpiece ( 1 ) by a laser beam ( 3 ), the workpiece having a surface coating ( 2 ) containing aluminum, characterized in that the laser beam ( 3 ) is combined with at least one electric arc ( 4 ) so as to melt the metal and actually weld the workpiece(s).
36 citations
Journal Article•
TL;DR: In this article, two torches are connected to the two terminals of a single power supply to increase weld joint penetration, which increases welding joint penetration and increases weld joint weld joint strength.
Abstract: Connecting two torches to the two terminals of a single power supply achieves more concentrated arcs that increase weld joint penetration.
36 citations
Patent•
08 Apr 1996TL;DR: In this article, stress corrosion cracking damage to stainless steels and nickel base superalloys is repaired by underwater plasma transferred arc welding under conditions which reduce residual tensile stresses in the weld and adjacent portions of the repaired structure.
Abstract: Stress corrosion cracking damage to stainless steels and nickel base superalloys is repaired by underwater plasma transferred arc welding which under conditions which reduce residual tensile stresses in the weld and adjacent portions of the repaired structure.
36 citations
Journal Article•
TL;DR: In this article, an empirical equation was developed that can predict the diffusible hydrogen in weld metal for gas-shielded flux cored arc welding, which is suitable for small-diameter electrodes and welding parameter ranges commonly used for out-of-position welding.
Abstract: Two experiments were conducted on gas-shielded flux cored arc welding. The first one tested the effects of shielding gas moisture contamination and welding parameters on the diffusible hydrogen content. The second compared the hydrogen levels of various unused electrodes with the diffusible hydrogen they produced in the weld. An empirical equation has been developed that can predict the diffusible hydrogen in weld metal for gas-shielded flux cored arc welding. Estimating diffusible hydrogen is possible using measured welding parameters, shielding gas dew point, and total hydrogen of the consumable. The equation is suitable for small-diameter electrodes and welding parameter ranges commonly used for out-of-position welding.
36 citations
TL;DR: In this paper, the abrasion wear resistance of Fe-32Cr-4.5C-wt% hardfacing alloy was investigated as a function of matrix microstructure, and the Pin-on-disk test results showed that under low (5) and high (20) load conditions, the wear resistance behavior of the as-welded matrix sample is 20 and 15% higher, respectively, than the martensitic matrix sample.
Abstract: The abrasion wear resistance of Fe–32Cr–4.5C wt% hardfacing alloy was investigated as a function of matrix microstructure. In this study, the alloy was deposited on ASTM A36 carbon steel plates by the shielded metal arc welding (SMAW) process and the as-welded matrix microstructure was changed into ferrite, martensite, and tempered martensite by heat treatment processes. The Pin-on-disk test results show that under low (5 N) and high (20 N) load conditions, the wear resistance behavior of the as-welded matrix sample is 20 and 15% higher, respectively, than the martensitic matrix sample, although the bulk hardness of the as-welded matrix is 5% lower. The ferritic matrix sample has the poorest wear resistance behavior which is less than half of that of the as-welded matrix one. Micro-ploughing, micro-cutting, and micro-cracking are recognized as the micro-mechanisms in the material removal in which the proportion of micro-ploughing mechanism increased by increasing matrix toughness.
36 citations