Three Dimensional Evaluations of REM Clusters in Stainless Steel

Bi, Yanyan; Karasev, Andrey; Jönsson, Pär G.

doi:10.2355/isijinternational.54.1266

Cited by 22 publications

(28 citation statements)

References 19 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The three-dimensional morphology of REE clusters in the 20 wt%Cr(-11wt%Ni) steels was recently reported by Karasev and Jonsson's research group using electrolytic extraction method. 19,20) From pilot scale casting practice of REE treated 20wt%Cr-10wt%Ni steels, they found that small single inclusions, probably formed due to steel reoxidation, resulted in faster clogging than large clusters did. 21) Recently, we investigated the effect of Al deoxidation on the inclusion evolution process in Ce-containing ASS melts.…”

Section: Introductionmentioning

confidence: 99%

Influence of Refractory-Steel Interfacial Reaction on the Formation Behavior of Inclusions in Ce-containing Stainless Steel

Kwon

Park

2015

ISIJ Int.

View full text Add to dashboard Cite

Effect of Ce addition on the interfacial reaction between alumina refractory and 25wt%Cr-20wt%Ni-4wt%Si-0.5wt%Mn stainless steel deoxidized by Al at 1 873 K was investigated to understand the contribution of the refractory-steel reaction to the inclusion evolution processes. The oxygen content markedly decreased by Al deoxidation, followed by a sluggish decrease by Ce addition greater than 0.5 wt%. The Ce content continuously decreased, but the higher the initial Ce content, the lower the Ce-decreasing rate was obtained. The content of Al initially decreased due to the formation of Al-rich inclusions, followed by an abrupt increase mainly due to a reduction of alumina refractory by Ce at the steel-refractory interface. The content of Al decreased again because of the formation of CeAlO 3 compound not only as inclusions but also as refractory-steel reaction products. The CeAl 11 O 18 and CeAlO 3 were formed at the refractory side, while the Ce 2 O 3 and CeAlO 3 were formed at the steel side in the 0.5 wt% and 1.0 wt% Ce added systems. From the refractory-steel reaction mechanism, the process of inclusion evolution was proposed to three steps as follows. The initial SiO 2 -rich oxides are reduced by Al, resulting in the formation of aluminosilicates inclusions (Step 1). The Al 2 O 3 in the inclusions are reduced by cerium, resulting in the formation of Ce-rich oxides (Step 2). Because the Ce content continuously decreased due to the refractory-steel reaction, the inclusions transform from Ce-Al complex oxides to Al-rich aluminosilicates and from Ce 2 O 3 to Ce-Al complex oxides in the 0.1 wt% and 0.5 wt% Ce added systems (Step 3).

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Refractory-Steel Interfacial Reaction on the Formation Behavior of Inclusions in Ce-containing Stainless Steel

Kwon

Park

2015

ISIJ Int.

View full text Add to dashboard Cite

show abstract

“…Rare earth (RE)‐containing inclusions is one of the optimal inclusions for developing AF microstructures. However, the RE‐bearing inclusions tend to form clusters and remain in molten steel as large inclusions, which are harmful to the mechanical properties of steel …”

Section: Introductionmentioning

confidence: 99%

“…However, the RE-bearing inclusions tend to form clusters and remain in molten steel as large inclusions, which are harmful to the mechanical properties of steel. [24][25][26] It is generally believed that Mg treatment introduces numerous homogeneously dispersed inclusions in molten steel and the Mg-bearing inclusions show a low tendency to growth and aggregation. [27,28] The Mg-bearing inclusions have been utilized to inhibit the austenite grain growth and refine the HAZ microstructure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mg on the Evolution of Inclusions and Formation of Acicular Ferrite in La–Ti‐Treated Steels

Cui

Song

Yang

et al. 2020

steel research int.

View full text Add to dashboard Cite

The size distribution and compositions of inclusions and microstructures in steels with different Mg contents are systematically investigated. The results show that Mg treatment modified and refined the inclusions. With Mg addition, the dominant inclusions in the samples evolve from LaAlO3 with MnS to a Mg‐enriched core enwrapped by a La‐enriched shell with MnS. While the Mg content increases from 11 to 66 ppm, the core changes from MgO·Al2O3 to MgO, and the shell develops from LaAlO3 to La2O2S. With the increase in Mg content from 0 to 44 ppm, the number density of effective inclusions is improved, and the proportion of acicular ferrite (AF) increases from 15% to 39%. However, the AF fraction decreases to 16% due to the relatively low amount of effective inclusions in the sample Mg3 with 66 ppm Mg.

show abstract

“…They reported that there exists a strong attraction force between REM particles which results in an agglomeration of inclusions and clusters. Bi et al 9) studied the characteristics of REM clusters in stainless steel after electrolytic extraction. An increase in the number of large sized clusters per cubic millimeter, at an expense of smaller clusters, with an increased holding time was observed.…”

Section: Formation and Growth Mechanism Of Clusters In Liquid Remallomentioning

confidence: 99%

Formation and Growth Mechanism of Clusters in Liquid REM-alloyed Stainless Steels

2015

Self Cite

View full text Add to dashboard Cite

Three Dimensional Evaluations of REM Clusters in Stainless Steel

Cited by 22 publications

References 19 publications

Influence of Refractory-Steel Interfacial Reaction on the Formation Behavior of Inclusions in Ce-containing Stainless Steel

Influence of Refractory-Steel Interfacial Reaction on the Formation Behavior of Inclusions in Ce-containing Stainless Steel

Effect of Mg on the Evolution of Inclusions and Formation of Acicular Ferrite in La–Ti‐Treated Steels

Formation and Growth Mechanism of Clusters in Liquid REM-alloyed Stainless Steels

Contact Info

Product

Resources

About