Materials Transactions Online

Materials Transactions, Vol.50 No.05 (2009) pp.1128-1134
© 2009 The Japan Institute of Metals

Mechanical Properties of Spheroidal Graphite Cast Iron Made by Reduced Pressure Frozen Mold Casting Process

Kazumichi Shimizu1, Yaer Xinba1, Masahito Tanaka2 and Hideki Shudai3

1Department of Material Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan
2Sankyo.Co.Ltd, Osaka 555-0001, Japan
3Mayekawa MFG. Co., Ltd, Tokyo 135-8482, Japan

The reduced pressure frozen mold casting process has been known as a recycling-based casting method with several advantages, such as improvement of the work environment, reduction of industrial waste and significant improvement of product yield. In this method, only water and silica sand were used to make mold, which was rapidly frozen at -40°C, then molten metal was poured into it. In the present investigation, samples were made by the reduced pressure frozen mold casting process and previous processes, and comparisons of their mechanical properties, especially the fatigue strength, were reported.
As a result, it was clarified that cast iron made by the reduced pressure frozen mold casting process has a sufficient strength; therefore the reduced pressure frozen mold casting process was expected to be applicable to other castings that have made by previous casting processes.

(Received 2008/10/8; Accepted 2009/2/23; Published 2009/4/8)

Keywords: reduced pressure, frozen mold, casting, mechanical property, fatigue strength

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