MISC

1997年

SH-CCT diagrams for welding and continuous cooling transformation behaviour for ductile cast iron

International Journal of Cast Metals Research
  • Takeshi Nakata
  • ,
  • Takayoshi Kasugai

10
2
開始ページ
99
終了ページ
103
記述言語
英語
掲載種別
DOI
10.1080/13640461.1997.11819224
出版者・発行元
Maney Publishing

The purpose of this study is to clarify the continuous cooling transformation behaviour of the HAZ (Heat-Affected Zone) of a ductile cast iron according to JIS FCD700. For this purpose, two SH-CCT diagrams (Continuous Cooling Transformation Diagrams for simulated HAZ) for welding were prepared at a maximum temperature of 1223 K corresponding to a region of the HAZ near the base metal, and of 1323 K corresponding to a region of the HAZ near the fusion line. Ferrite and pearlite transformation regions in the SH-CCT diagram at 1323 K occurred after a longer time than those at 1223 K. A Bainite transformation region existed only in the SH-CCT diagram of 1223 K. Martensite transformation temperature is about 530 K for both of the simulated HAZs. These effects will be because of non-homogeneous carbon distribution in austenite near the graphite caused by the dissolution and growth of graphite during the heating and cooling in a welding thermal cycle. The range of cooling times when the hardness drops rapidly was about 10 s to 60 s in both simulated HAZs. It seems that the hardenability of the simulated HAZ prepared at 1323 K is a little greater than at 1223 K.

リンク情報
DOI
https://doi.org/10.1080/13640461.1997.11819224
ID情報
  • DOI : 10.1080/13640461.1997.11819224
  • ISSN : 1364-0461
  • identifiers.cinii_nr_id : 9000239248799
  • SCOPUS ID : 24044499349

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