Algorithm for quantifying the particle size distribution of non-metallic inclusions formation in steel production

Karlo Raić,Marija Mihailović

doi:10.30544/776

Abstract

When the quantitative characterization of non-metallic inclusions in steel is done and the effect of limiting factors is assessed, and based on that the possibility of reconstruction of the total content of non-metallic inclusions in steel is estimated, further considerations can be directed towards predicting the model of size distribution curve. The aim of this work is to establish relations on the basis of which it will be possible to quantify the content of non-metallic inclusions in extra-pure steels, when metallographic control is difficult or even impossible by routine procedures.

Highlights

Non-metallic inclusions are deoxidation products in the steelmaking process
When the quantitative characterization of non-metallic inclusions in steel is done and the effect of limiting factors is assessed, and based on that the possibility of reconstruction of the total content of non-metallic inclusions in steel is estimated, further considerations can be directed towards predicting the model of the size distribution curve
The aim of this work is to establish relations based on which it will be possible to quantify the content of non-metallic inclusions in extra-pure steels, when metallographic control is difficult or even impossible by routine procedures

Summary

Introduction

Non-metallic inclusions are deoxidation products in the steelmaking process. Their final number and shape in the steel structure is the result of three spontaneous processes:-nucleation of stable nuclei, formed from oxygen dissolved in steel and added deoxidizer;-growth of inclusions by various mechanisms, the most effective is an enlargement of small inclusions by collisions;-floating non-metallic inclusions and their transition to slag or adhering to the refractory lining.Process parameters influencing the final number and size of inclusions after steel hardening are the initial oxygen content in steel, before deoxidation, and the availableMetall. Non-metallic inclusions are deoxidation products in the steelmaking process. Their final number and shape in the steel structure is the result of three spontaneous processes:. -nucleation of stable nuclei, formed from oxygen dissolved in steel and added deoxidizer;. -floating non-metallic inclusions and their transition to slag or adhering to the refractory lining. Process parameters influencing the final number and size of inclusions after steel hardening are the initial oxygen content in steel, before deoxidation, and the available. 437-447 time from the beginning of deoxidation to steel solidification. The time is especially important when strong deoxidizing agents are used, after the addition of which very little dissolved oxygen remains in the liquid steel [1, 2]

Objectives

Conclusion