Deoxidation and modification of steels with reduced silicon content

The object of research is the processes that affect mechanical characteristics steels after treatment melts with silicon-free complex master alloys according to existing technologies. One most problematic places negative effect silicon on weldability low-alloy steel, sharply increasing heterogeneity welds in sulfur and phosphorus their susceptibility hot cracks. cyclic strength welded joints decreases markedly an increase concentration steel. Also this case, there a threat formation monoxide, which significantly increases fragility finished steel products. Also, processed containing are prone decarburization, surface defects during working graphite formation, reduces endurance limit. In it was possible prove use ligatures (SFCL) smelting made obtain (2–3 times) entire operational properties, especially ductility, impact at normal test temperatures (cold resistance) , fatigue strength. some cases, level properties cast metal reaches deformed version its manufacture, for example, rolled products even obtained by electroslag remelting. Processing melt various BKL when tapping from furnace into pouring ladle instead aluminum alloys, silicocalcium ferrocerium (according current technology) provided required high stability 20GML thanks BCL, reduce consumption deoxidizers 4.2 kg per ton liquid yield rejection casting 6–10 %. It has been established work BCL leads stabilization chemical composition, refinement grain structure steels, as well dispersion characteristics.