Title:
LIGHT CAST-IRON PRODUCT
Document Type and Number:
WIPO Patent Application WO/2012/090761
Kind Code:
A1
Abstract:
Provided is a cast-iron product that satisfies demands for both weight reduction and strength enhancement with good balance. A cast ion product having an internal honeycomb structure is manufactured by means of: a decarburizing process in which a cast-iron product comprising hypoeutectic cast iron is heated to form a decarburized layer on the surface of the cast-iron product; an outflow-hole forming process in which an outflow hole is formed penetrating further inside than the decarburized layer; and a liquation process in which the cast-iron product is heated to a temperature lower than the melting point of the decarburized layer but higher than the melting point of the hypoeutectic cast iron in a state where the cast-iron product is held in a position such that the outflow hole is positioned in the lower part thereof.
Inventors:
ASADA YASUSHI (JP)
Application Number:
PCT/JP2011/079367
Publication Date:
July 05, 2012
Filing Date:
December 19, 2011
Export Citation:
Assignee:
ASADA KATAN CHUTETU SYO CO LTD (JP)
ASADA YASUSHI (JP)
ASADA YASUSHI (JP)
International Classes:
B22D25/02; B22D29/00; C21C1/08; C22C37/00
Foreign References:
| JP2005219083A | 2005-08-18 | |||
| JP2008215331A | 2008-09-18 | |||
| JPS5337958A | 1978-04-07 |
Attorney, Agent or Firm:
Kyoto International Patent Law Office (JP)
Patent business corporation Kyoto international patent firm (JP)
Patent business corporation Kyoto international patent firm (JP)
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