Tato bakalářská práce se zabývá svařováním hliníkových slitin metodou MIG AC a porovnáním této metody s metodou MIG DC+. Teoretická část obecně popisuje problematiku svařování slitin hliníku, shrnuje normalizované značení těchto slitin, jejich rozdělení a mechanické i technologické vlastnosti. Dále popisuje vybrané metody svařování hliníkových slit...
Published in Materials
The research work and related tests aimed to identify the effect of filler metal-free laser beam welding on the structure and properties of butt joints made of steel 700MC subjected to the TMCP (thermo-mechanically controlled processed) process. The tests involved 10-mm thick welded joints and a welding linear energy of 4 kJ/mm and 5 kJ/mm. The ine...
Bakalářská práce se zaměřuje na porovnání vlastností ocelí S355J2+AR a S355NL vhodných pro svařování. V práci je popsána problematika svařitelnosti jemnozrnných a uhlíkových ocelí, a jejich značení a dělení dle evropských norem. Práce také popisuje základní druhy svařovacích procesů a jejich aplikace s ohledem na blíže zkoumané oceli. Dále práce ob...
Published in Steel in Translation
AbstractDue to general trends in the development of the heavy plate market in the segments of shipbuilding and marine engineering, as well as on the base of the rolling mill 4200, NLMK DanSteel has developed chemical compositions and mastered the production technology of rolled products with a thickness up to 55 mm from low carbon microalloyed stee...
In this study, weldability and cracking susceptibility of SN 490C steel were firstly investigated. For this study, SN 490C thick plates which had been developed for anti-seismic steel of building structures were welded by flux-cored arc welding (FCAW) and submerged arc welding (SAW) processes based on welding conditions of actual construction site....
Published in Materials
Thermo-mechanically rolled S460ML steel was chosen for welding in underwater wet welding conditions by covered electrodes. The main aim of this study was to check the weldability for fillet welds in a water environment by controlled thermal severity (CTS) tests and to check the influence of temper bead welding (TBW) on the weldability of the invest...
The modern high strength steel plates have an excellent combination of strength and toughness based on micro-alloying and complex microstructure. Retaining this combination of properties in the weld zone is a major challenge for applications in high-demanding structural construction. This work investigates the weldability of three different modern ...
Published in International Journal of Minerals, Metallurgy, and Materials
The weldability of the ZhS6U nickel-based superalloy, which is prone to solidification cracking during electron-beam welding (EBW) repair processes, was investigated. The effects of two different pre-weld heat-treatment cycles on the final microstructure before and after welding were examined. Welds were made on flat coupons using an EBW machine, a...
The present article analyses the influence of preheating and a postweld heat treatment in the microstructure, mechanical properties and wear behaviour of a joint of nodular graphite cast iron when using the tungsten inert gas (TIG) welding process with perlitic grey cast iron rods as filler material. Data obtained from the tests and the microstruct...
Published in Journal of Materials Engineering and Performance
It was attempted to produce galvannealed dual-phase (DP) steel through a commercial continuous galvanizing line (CGL). The main challenge was to form the DP microstructure even with the slow cooling rate after annealing in the CGL. A two-pronged approach was adopted for this, viz. design of the steel chemistry with calculations and optimization of ...
