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溶融Zn-6mass%Al浴に浸漬した炭素鋼の界面反応挙動に及ぼす炭素濃度の影響

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Title: 溶融Zn-6mass%Al浴に浸漬した炭素鋼の界面反応挙動に及ぼす炭素濃度の影響
Other Titles: Effect of Carbon Content on the Reaction Behavior of Hot Dipped Carbon Steel in Molten Zn-6mass%Al Bath
Authors: 田中, 順一1 Browse this author
小野, 圭介2 Browse this author
林, 重成3 Browse this author →KAKEN DB
大笹, 憲一4 Browse this author
成田, 敏夫5 Browse this author
Authors(alt): Tanaka, Junichi1
Ono, Keisuke2
Hayashi, Shigenari3
Ohsasa, Kenichi4
Narita, Toshio5
Keywords: Carbon steel
Zn-Al Coating Layer
Hot Dipping
Microstructure
Alloy Layer
Issue Date: 1-Feb-2002
Publisher: 表面技術協会
Journal Title: 表面技術
Journal Title(alt): Journal of the Surface Finishing Society of Japan
Volume: 53
Issue: 2
Start Page: 129
End Page: 133
Publisher DOI: 10.4139/sfj.53.129
Abstract: The phases and microstructure of the alloy layer formed during hot dipping of carbon steels in molten Zn-Al bath were investigated. Pure iron, 0.2%C and 0.82%C steels and 2.45%C cast iron were used. A plate shape specimen of 300μm in thickness was firstly hot dipped in a molten Zn bath for 3s and then hot dipped in a molten Zn-6mass%Al alloy bath for certain times, and quenched with water. The microstructure of the quenched specimen was observed by using a SEM, and change in thickness of the specimen was measured by using a laser microscope. The pure iron specimen was entirely changed to an intermetallic compound of Fe2Al5(Zn) phase after 1.2ks hot dipping. The thickness of 0.2%C steel specimen was decreased linearly with the dipping time after an early non-reaction period, and 2/3 of the specimen was changed to the Fe2Al5(Zn) phase after 3.6ks hot dipping. It was observed that primarily precipitated ferrite phase preferentially reacted and pearlite structure scarcely reacted. The reacted thickness of the 0.82%C steel and cast iron specimens were only several μm after 86.4Ks hot dipping. In the cast iron specimen, cementite reacted with Al and an Al3C4 phase was formed. The growth of the alloy layer was restricted by the Al3C4 phase. A heat-treated 0.2%C steel specimen with sorbite structure also exhibited the same low reaction behavior as the 0.82% C steel due to homogenized ferrite + cementite structure.
Type: article
URI: http://hdl.handle.net/2115/76342
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 林 重成

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