Structure and Properties of Slags Used in the Continuous Casting of Steel: Part 1 Conventional Mould Powders

• Mills Kenneth C.

  Department of Materials, Imperial College

抄録

The physical properties of mould slags are key to their performance in the continuous casting process. The magnitudes of key properties (viscosity, break temperature, f_cryst and optical properties) are determined by the mould dimensions, casting conditions and the steel grade being cast. However, a range of other properties (e.g. interfacial tension, density) are needed to minimise defects and process problems. The extant data for thermo-physical properties of conventional mould slags are reviewed here and those for specialist powders (e.g. F-free or for casting TRIP steels) are reviewed in Part 2. It was concluded that there is a need for (i) resolution of the huge differences in thermal conductivity of mould slags for T>1050 K obtained with the LP and THW methods (ii) more data for some properties (e.g. C_p and density) and more accuracy for others (viscosity, surface tension) (iii) standardised procedures for the determination of f_cryst and (iv) characterisation of the porosity in slag films. It was also concluded that (i) gaseous convection makes a significant contribution to the heat transfer in the powder bed and (ii) glassy slag films are probably optically-thin.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 56 (1), 1-13, 2016

  一般社団法人 日本鉄鋼協会

キーワード

• mould powders
• continuous casting
• physical properties
• structure

詳細情報

• CRID: 1390001206488691456
• NII論文ID: 130005121371
• DOI: 10.2355/isijinternational.isijint-2015-231
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/56/1/56_ISIJINT-2015-231/_pdf
• 本文言語コード: en
• データソース種別:
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