Use of Slag Containing Water as Lubricant in High Straining Rolling for Ultrafine-grained Steels

Nakamoto, Masashi; Lee, Joonho; Tanaka, Toshihiro; Ikeda, Jiro; Inagaki, Satoshi

doi:https://doi.org/10.2355/isijinternational.45.1567

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論文情報

タイトル	Use of Slag Containing Water as Lubricant in High Straining Rolling for Ultrafine-grained Steels
著者	NRID 1000080467539 1000080467539 著者名 Nakamoto, Masashi
	著者名 Lee, Joonho
	NRID 1000010179773 1000010179773 著者名 Tanaka, Toshihiro
	著者名 Ikeda, Jiro
	NRID 1000010108061 1000010108061 著者名 Inagaki, Satoshi
キーワード等	lubricant
	waste slag
	high straining rolling
	ultrafine-grained steel
	slag containing water
	glass transition temperature
	hydrothermal condition
	porous structure
	water release
内容	The Iron and Steel Institute of Japan
抄録	We investigated the possibility of using waste slag as a lubricant in high straining rolling for ultrafine-grained steels. When slag is applied as a lubricant, it might satisfy the requirement for stable biting workpieces because slag is as stable as glass with high hardness at the biting temperatures in rolling (100-200°C). On the other hand, ordinary slag doesn't have the fluidity necessary to provide a lubricating effect at rolling temperatures of 300-400°C since its melting temperature is usually high. However, slag containing water has been targeted as a new lubricant, and we focused on lowering the glass transition temperature and the structural change of slag containing water with the aim of improving the lubricity of slag in rolling. The microstructures of slag containing water and slag that released water were observed in the present study, along with in-situ observation of water released from the surface of slag containing water were conducted after heating in a SiO_2-Na_2O-B_2O_3 slag system. We found that water was mainly contained in the phase formed by ions dissolved from the original slag under hydrothermal conditions, and the amount of water was dependent on the state of the phase, such as glass or crystal. It was confirmed that slag containing water could provide a lubricating effect when the water is released from the slag above the glass transition temperature because a porous structure is formed due to the water release.
出版者	日本鉄鋼協会
	The Iron and Steel Institute of Japan
	ニホン　テッコウ　キョウカイ
収録物名	ISIJ International
巻	45
号	11
開始ページ	1567
終了ページ	1571
刊行年月	2005
言語	英語
ハンドルURL	https://hdl.handle.net/11094/26407
ISSN	09151559
NCID	AA10680712
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.2355/isijinternational.45.1567
アクセス権	open access
権利情報	© 2005 ISIJ
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	ISIJ International.45(11) p.1567-p.1571
DC.title	Use of Slag Containing Water as Lubricant in High Straining Rolling for Ultrafine-grained Steels
DC.creator	Nakamoto, Masashi
	Lee, Joonho
	Tanaka, Toshihiro
	Ikeda, Jiro
	Inagaki, Satoshi
DC.publisher	日本鉄鋼協会
	The Iron and Steel Institute of Japan
	ニホン　テッコウ　キョウカイ
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2005
DC.identifier	https://doi.org/10.2355/isijinternational.45.1567
DC.subject	lubricant
	waste slag
	high straining rolling
	ultrafine-grained steel
	slag containing water
	glass transition temperature
	hydrothermal condition
	porous structure
	water release
DC.description	The Iron and Steel Institute of Japan
DCTERMS.abstract	We investigated the possibility of using waste slag as a lubricant in high straining rolling for ultrafine-grained steels. When slag is applied as a lubricant, it might satisfy the requirement for stable biting workpieces because slag is as stable as glass with high hardness at the biting temperatures in rolling (100-200°C). On the other hand, ordinary slag doesn't have the fluidity necessary to provide a lubricating effect at rolling temperatures of 300-400°C since its melting temperature is usually high. However, slag containing water has been targeted as a new lubricant, and we focused on lowering the glass transition temperature and the structural change of slag containing water with the aim of improving the lubricity of slag in rolling. The microstructures of slag containing water and slag that released water were observed in the present study, along with in-situ observation of water released from the surface of slag containing water were conducted after heating in a SiO_2-Na_2O-B_2O_3 slag system. We found that water was mainly contained in the phase formed by ions dissolved from the original slag under hydrothermal conditions, and the amount of water was dependent on the state of the phase, such as glass or crystal. It was confirmed that slag containing water could provide a lubricating effect when the water is released from the slag above the glass transition temperature because a porous structure is formed due to the water release.
DC.rights	© 2005 ISIJ
DC.format	application/pdf
citation_title	Use of Slag Containing Water as Lubricant in High Straining Rolling for Ultrafine-grained Steels
citation_author	Nakamoto, Masashi
	Lee, Joonho
	Tanaka, Toshihiro
	Ikeda, Jiro
	Inagaki, Satoshi
citation_publisher	日本鉄鋼協会
	The Iron and Steel Institute of Japan
	ニホン　テッコウ　キョウカイ
citation_language	英語
citation_date	2005
citation_journal_title	ISIJ International
citation_volume	45
citation_issue	11
citation_firstpage	1567
citation_lastpage	1571
citation_issn	09151559
citation_doi	https://doi.org/10.2355/isijinternational.45.1567
citation_public_url	https://hdl.handle.net/11094/26407

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