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jwri38_01_037
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論文情報
タイトル
Friction Stir Welding of High Carbon Tool Steel (SK85) below Eutectoid Temperature
著者
Chung, Young Dong
Chung, Young Dong
Fujii, Hidetoshi
Fujii, Hidetoshi
Nakata, Kazuhiro
Nakata, Kazuhiro
Nogi, Kiyoshi
Nogi, Kiyoshi
キーワード等
Hyper eutectoid steel (SK85, AISI-SAE W1-8)
Friction Stir Welding, Butt welding
Hardness
A₁ point (eutectoid temperature 726ºC))
Phase transformation
Microstructure
抄録
The present study is concerned with applying FSW to a high carbon tool steel (0.85 wt % carbon, JIS-SK85, AISI-1080) with below and above A₁(726℃) welding conditions and analyzing the joints as well as evaluating the joint quality. Defect-free joints can be successfully fabricated and the joint structure and the mechanical properties were investigated for both conditions. The microstructures of the above A₁ joints mainly consisted of martensite. Therefore, the micro-hardness of the above A₁ joints is significantly higher at more than 1000HV. The tensile tests results are scattered and some of the joints are fractured at the stir zone while others are fractured the base metal. On the other hand, the microstructures of the below A₁ joints consist of ferrite with globular cementite, and grain-refinement occurs because no phase transformation to the martensite structures occurs. The high carbon tool steel was successfully friction-stir was welded below the A₁ and a method has been established to obtain sound joints which show a stable fracture and a good strength.
公開者
大阪大学接合科学研究所
公開者の別表記
Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
掲載誌名
Transactions of JWRI
巻
38
号
1
開始ページ
37
終了ページ
41
刊行年月
2009-09
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/5267
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.38 No.1 (2009-09)
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.38(1) P.37-P.41
DC.title
Friction Stir Welding of High Carbon Tool Steel (SK85) below Eutectoid Temperature
DC.creator
Chung, Young Dong
Fujii, Hidetoshi
Nakata, Kazuhiro
Nogi, Kiyoshi
DC.publisher
大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766
英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF
2009-09
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/5267
DC.subject
Hyper eutectoid steel (SK85, AISI-SAE W1-8)
Friction Stir Welding, Butt welding
Hardness
A₁ point (eutectoid temperature 726ºC))
Phase transformation
Microstructure
DCTERMS.abstract
The present study is concerned with applying FSW to a high carbon tool steel (0.85 wt % carbon, JIS-SK85, AISI-1080) with below and above A₁(726℃) welding conditions and analyzing the joints as well as evaluating the joint quality. Defect-free joints can be successfully fabricated and the joint structure and the mechanical properties were investigated for both conditions. The microstructures of the above A₁ joints mainly consisted of martensite. Therefore, the micro-hardness of the above A₁ joints is significantly higher at more than 1000HV. The tensile tests results are scattered and some of the joints are fractured at the stir zone while others are fractured the base metal. On the other hand, the microstructures of the below A₁ joints consist of ferrite with globular cementite, and grain-refinement occurs because no phase transformation to the martensite structures occurs. The high carbon tool steel was successfully friction-stir was welded below the A₁ and a method has been established to obtain sound joints which show a stable fracture and a good strength.
citation_title
Friction Stir Welding of High Carbon Tool Steel (SK85) below Eutectoid Temperature
citation_author
Chung, Young Dong
Fujii, Hidetoshi
Nakata, Kazuhiro
Nogi, Kiyoshi
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2009-09
citation_journal_title
Transactions of JWRI
citation_volume
38
citation_issue
1
citation_firstpage
37
citation_lastpage
41
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/5267
citation_keywords
Hyper eutectoid steel (SK85, AISI-SAE W1-8)
Friction Stir Welding, Butt welding
Hardness
A₁ point (eutectoid temperature 726ºC))
Phase transformation
Microstructure