Metallurgy and Foundry Engineering
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ISSN 1230-2325
e-ISSN: 2300-8377
Issue Date
2014
Volume
Vol. 40
Number
No. 4
Description
Journal Volume
Metallurgy and Foundry Engineering
Vol. 40 (2014)
Projects
Pages
Articles
Preliminary studies of seamless flux-cored wires stored in extreme conditions
(2014) Fydrych, Dariusz Marek; Świerczyńska, Aleksandra; Landowski, Michał Karol
In this paper, we describe the preliminary experimental studies of flux-cored wires moisturized under controlled conditions. Three seamless wires of different grades have been placed in an environmental chamber and moisturized in extremely adverse conditions (temperature T = 60°C, relative humidity H = 90%) for 240 hours. During this time, measurements of weight gain as well as surface observations of the wires have been carried out. Also, the amount of diffusible hydrogen in deposited metal was determined by the mercury method for one of the moisturized wires. A significant increase in the level of hydrogen was observed (from H5 to H10). Further research will aim to determine the effect of storage conditions on the hydrogenation of deposited metal and quality of flux-cored wires.
Diffusible hydrogen content in the deposited metal of multilayer welded joints
(2014) Fydrych, Dariusz Marek; Świerczyńska, Aleksandra; Rogalski, Grzegorz
This article describes the manufacturing technology of multilayer joints in terms of controlling the diffusible hydrogen content. The diffusible hydrogen content in deposited metal for multilayer welded joints made of covered rutile electrodes or covered cellulosic and basic electrodes was determined. It was found that, after four beads, the diffusible hydrogen content decreases from 36 m l/100 g to 18 ml/100 g in the ca se of the first technology, and about 40 ml/100 g to a level of 12 ml/100 g in the second. The explanation of the mechanisms responsible for this phenomenon and direction s for further study have been proposed.
Microstructure of TIG welded with selected magnesium alloys
(2014) Tuz, Lechosław; Pańcikiewicz, Krzysztof; Żurek, Zbigniew
An evaluation of the macro- and microstructure of magnesium alloy tungsten arc-welded butt joints is presented in this paper. Al-Zn-Mn magnesium alloys are taken into consideration in the research. Their main alloying elements are zinc and aluminum, respectively. The dendritic microstructure of the base metal is obtained. The analysis shows that achieving good-quality butt joints of magnesium alloys is possible.