日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 82, No. 07 (2018),
pp. 223-231

Morphological Characteristics of Alumina Cluster Inclusions Acting as Precipitation Sites for MnS in Steel

Yoshiyuki Ueshima 1, Seiki Takebayashi 2, Ken-ichi Yamamoto 3, Masafumi Miyazaki 2 and Kazumi Mizukami 2

1 Nippon Steel & Sumitomo Metal Corporation
2 Technical Research & Development Bureau, Nippon Steel & Sumitomo Metal Corporation
3 Oita R&D Laboratories, Technical Research & Development Bureau, Nippon Steel & Sumitomo Metal Corporation

Abstract:

The morphological characteristics of alumina cluster inclusions acting as precipitation sites for MnS in steel were studied by 3D-SEM observation and model calculation. It was found that notches at the bonding parts of alumina particles with an apex angle of less than 70° remarkably act as precipitation sites for MnS.

[doi:10.2320/jinstmet.J2018003]


(Received 2018/01/16)

Keywords:

manganese sulfide, alumina cluster inclusion, preferential precipitation site


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