Effect of Mg Addition on Equiaxed Grain Formation in Ferritic Stainless Steel

Effect of Mg Addition on Equiaxed Grain Formation in Ferritic Stainless Steel

The effect of Mg and Ti addition on the solidification macrostructure of ferritic stainless steel was evaluated in order to obtain fine equiaxed grains. Equiaxed solidification was promoted by adding Mg and Ti. Ti addition affects the amount of TiN as a nucleation agent of δ-Fe and the increase in c...

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Veröffentlicht in:ISIJ International 2013/12/15, Vol.53(12), pp.2167-2175
Hauptverfasser: Kimura, Ken, Fukumoto, Shigeo, Shigesato, Gen-ichi, Takahashi, Akihiko
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
columnar-to-equiaxed transition
Exact sciences and technology
ferritic stainless steel
heterogeneous nucleation
Metals. Metallurgy
Mg addition
spinel
TiN
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Zusammenfassung:The effect of Mg and Ti addition on the solidification macrostructure of ferritic stainless steel was evaluated in order to obtain fine equiaxed grains. Equiaxed solidification was promoted by adding Mg and Ti. Ti addition affects the amount of TiN as a nucleation agent of δ-Fe and the increase in constitutional undercooling. Mg addition produces spinel oxide in the molten steel, which accelerates the TiN formation. [Al] content also have an influence on the equiaxed grain formation.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.53.2167