Experimental study of parameters for liquid steel sampling
2010 (English)In: Steel Grips - Journal of Steel and Related Materials, ISSN 1611-4442, Vol. 8, 115-124 p.Article in journal (Refereed) Published
Sampling of liquid steel to control the steel making process is very important in the steel industry. However, numerous types of disposable samplers are available and no united standard for sampling exists today. The goal in this study is to investigate the effect of slag protection type and sample geometry on sampling parameters such as filling velocity and solidification rate. Three sample geometries were selected: i) Björneborg, ii) 6 mm thick Lollipop, and iii)12 mm thick Lollipop. These have been tested with two types of slag protection: metal-cap protection and argon protection. The filling velocity and solidification rate of steel samples, which are very important for inclusion characteristics and sample quality, have been experimentally measured during plant trials. The study shows that argon protected samples have lower, more even, filling velocities (0.19 ± 0.09 m/s) compared to metal-cap protected samples (1.77 - 2.08 m/s). Solidification rate results for a 304L stainless steel show that the 6 mm thick Lollipop sample solidifies at a rate of about 100 °C/s while the Björneborg and the 12 mm thick Lollipop sample solidifies at a rate of about 20 °C/s.
Place, publisher, year, edition, pages
2010. Vol. 8, 115-124 p.
Liquid steel sampling, slag protection, filling velocity, solidification rate
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-26084DOI: 10.5161/steel/2010/g02332OAI: oai:DiVA.org:kth-26084DiVA: diva2:369916
QC 201011122010-11-122010-11-122010-11-12Bibliographically approved