Research into the effect of certain chemical elements in microalloyed steel grades on concast slab and rolled plate surface quality
Machines. Technologies. Materials., Vol. 13 (2019), Issue 4, pg(s) 178-182
Investigators has developed a complex technology of manufacture of high quality skelp and shipbuilding grades and nickel-,chromium-, molybdenum-, niobium- and vanadium- microalloyed steels with carbon mass fraction within 0.06% to 0.22% and manganese mass fraction within 1.0% to 1.7%. Over the course of the research, relative occurrence of surface cracks of various morphology – transverse, longitudinal, spider, net-like – on the concast slab surface has been determined. The above research resulted in the development of a number of technological innovations both in preparation of liquid steel for casting and in continuous casting itself, preventing initiation or reducing by 30% – 40% the amount of surface defects on the rolled plates.