METHOD FOR PRODUCING DIE-CAST PRODUCT OF SPHEROIDAL GRAPHITE CAST IRON HAVING ULTRAFINE SPHEROIDAL GRAPHITE, AND DIE-CAST PRODUCT OF SPHEROIDAL GRAPHITE CAST IRON

Title:

METHOD FOR PRODUCING DIE-CAST PRODUCT OF SPHEROIDAL GRAPHITE CAST IRON HAVING ULTRAFINE SPHEROIDAL GRAPHITE, AND DIE-CAST PRODUCT OF SPHEROIDAL GRAPHITE CAST IRON

Document Type and Number:

WIPO Patent Application WO/2017/010569

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing a method for producing a spheroidal graphite cast iron containing spheroidized graphite at a quantity of 3000 per mm2 or more in an as-cast state. Provided is a method for producing a die-cast product of an ultrafine spheroidal graphite cast iron that has a melting step in which an original melt is obtained by heating and melting a raw material comprising cast iron, a spheroidization step in which spheroidization is carried out, an inoculation step in which inoculation is carried out, and a casting step in which the melt is cast into a die, wherein the method is characterized in that the quantity of nitrogen is regulated so that the quantity of nitrogen generated when melting the die-cast product is 0.9 ppm (by mass) or less.

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Inventors:

ITOFUJI HARUKI (JP)
ITAMURA MASAYUKI (JP)
ANZAI KOICHI (JP)
YAMAGUCHI KAZUYOSHI (JP)

Application Number:

PCT/JP2016/071036

Publication Date:

January 19, 2017

Filing Date:

July 15, 2016

Export Citation:

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Assignee:

I2C CO LTD (JP)
UNIV TOHOKU (JP)

International Classes:

C21C1/10; B22D27/20

Foreign References:

JP2006063396A	2006-03-09
JP2004223608A	2004-08-12
JP2000045011A	2000-02-15
JPS63260667A	1988-10-27

Other References:

HARUKI ITOFUJI ET AL.: "Kyujo Kokuen Chutetsu no Muchiru Kanagata Chuzo", THE 166 TH JAPANESE FOUNDRY ENGINEERING SOCIETY, REPORTS OF THE JFS MEETING, 1 May 2015 (2015-05-01), pages 96
YONGHA, LEE ET AL.: "Chill Reducing Method of As-Cast Spheroidal Graphite Cast Iron Using Metal Mold", THE JOURNAL OF THE CASTING INSTITUTE OF JAPAN, vol. 55, no. 3, 1983, pages 156 - 163, XP055345325

Attorney, Agent or Firm:

FUKUMORI, Hisao (JP)

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