Title:
SPHEROIDAL GRAPHITE CAST IRON HAVING EXCEPTIONAL STRENGTH AND DUCTILITY AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2013/100148
Kind Code:
A1
Abstract:
Spheroidal graphite cast iron having: (a) a composition comprising 3.4-4% of C, 1.9-2.8% of Si, 0.02-0.06% of Mg, 0.2-1% of Mn, 0.2-2% of Cu, 0-0.1% of Sn, and 0.85-3% of (Mn+Cu+10×Sn) where P≤0.05%, S≤0.02%, and the remainder is constituted of Fe and unavoidable impurities (all amounts being expressed in terms of the weight ratio); (b) a two-phase mixed-base structure comprising, by area ratio, 2-40% of a fine ferrite phase and 60-98% of a fine pearlite phase, the maximum length of the ferrite phase being 300 µm or less; and (c) the pearlite phase being formed around graphite dispersed in the two-phase mixed-base structure.
Inventors:
WANG LIN (JP)
KAWABATA MASAHIDE (JP)
FUKUMOTO KENTARO (JP)
KAWABATA MASAHIDE (JP)
FUKUMOTO KENTARO (JP)
Application Number:
PCT/JP2012/084215
Publication Date:
July 04, 2013
Filing Date:
December 28, 2012
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
C22C37/04; C21D5/00; C22C33/10
Foreign References:
| JPH0813079A | 1996-01-16 | |||
| JP2010189706A | 2010-09-02 | |||
| JPS51123719A | 1976-10-28 | |||
| JP2002317238A | 2002-10-31 | |||
| JP2009001865A | 2009-01-08 | |||
| JP2001214233A | 2001-08-07 | |||
| JPH0813079A | 1996-01-16 |
Other References:
See also references of EP 2799565A4
Attorney, Agent or Firm:
TAKAISHI Kitsuma (JP)
Kitsuma Takaishi (JP)
Kitsuma Takaishi (JP)
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Claims: