NOVEL INCLUSION ENGINEERING METHOD FOR IMPROVING CLEANLINESS AND MECHANICAL PROPERTIES OF STEEL PLATES SUITABLE FOR PRESSURE VESSELAPPLICATION

Non-metallic inclusions, which are present in steel, are known to be main sites of fatigue and tensile crack nucleation and defects in steels. The content, size and distribution of oxide inclusions significantly affects steels quality especially for high quality plates, wire rods, bearings, steels for a pipe lines, rails & wheels etc. Non-metallic inclusions are a significant problem in cast steels that can lead to excessive nozzle clogging during continuous casting and defects in finished product. The mechanical behavior of steel is controlled to a large degree by the volume fraction, size, distribution, composition and morphology of inclusions and precipitates, which act as stress raisers.