Cleanness and Mechanical Properties of Steel after Remelting under Different Slags by ESR

Abstract

Quality of machine production is very close-knit with quality of metallurgical semi-products and with improvement their working properties. It can be achieved first of all by decrease of sulphur and non-metallic inclusions content in metal. Improvement of working properties provide remelted processes above an electro slag remelting (ESR). The slags play very important role by ESR process. By experiments steel with next chemical composition was used: C (0,9 – 1,1%), Mn (0,30 – 0,50%), Si (0,15 – 0,35%), Cr (1,30 – 1,65%), Ni (max.0,30%), Cu (max.0,25%), P (max.0,027%), S (max.0,030%). The steel was remelted under 8 types of slags on the base of CaO, Al2O3, CaF2 and SiO2 in different ratios. The contribution deals with influence of chemical composition of slag on mechanical properties and cleannes of metal after electro slag remelting. Variation of slag chemical composition enables to change chemical composition of remelted steel, to reduce the non-metallic inclusions and sulphur content and to improve the mechanical properties of steel.

Case-based product development of a high-pressure die casting injection subset using design science research

“…Defined as a hot work tool steel, it undergoes an electro-slag remelting (ESR) process, thus enabling the production of high-quality ingots. This is achieved by eradicating all traces of micro and macro segregations, ensuring a homogenous chemical composition and the materials isotropy regarding its mechanical properties, as well as achieving a high level of purity through improved distribution of inclusions [45][46]. This H13 ESR hot work tool steel features an increase in wear resistance under elevated working temperature, thermal conductivity, hardness, toughness, and tensile strength [47].…”

The effect of non-metallic inclusion size and orientation on tensile properties of stainless steel (simulation and experiment)

“…This branch of research deals with new and modern techniques for decreasing the size and volume fraction of NMIs in order to improve the properties of steel. The electro-slag remelting process is one of the modern and conventional techniques for improving steel cleanliness [17]. In previous studies, the effect of the electro-slag remelting process on microstructure, inclusion content and mechanical properties of bearing steel G20CrNi2Mo [18], H11 tool steel [19], 316 LC stainless steel [20] and STN 14 109 steel [21] were investigated.…”