METHOD FOR PRODUCING NEAR-NET-SHAPE MATERIAL FOR ENGINE PISTON

WIPO Patent Application WO/2011/052708

A1

Disclosed is a method for producing a near-net-shape material for an engine piston, which comprises: a continuous casting step in which a cast rod (31) having a diameter of 85 mm or less is obtained by continuously casting a melt (30) of an aluminum alloy at a melt temperature of 720˚C or more; and a forging step in which a near-net-shape material (11) for an engine piston is obtained by forging a material for forging (32) that has been obtained by homogenizing the cast rod (31) at a temperature of 300-500˚C. The melt (30) has a composition that contains 11.0-13.0% of Si, 0.6-1.0% of Fe, 3.5-4.5% of Cu, 0.25% or less of Mn, 0.4-0.6% of Mg, 0.15% or less of Cr, from 0.6% to {(-4/6) × [Cu mass%] + 5}% of Ni, 0.07-0.15% of Zr, 0.005-0.010% of P, and 0.002 mass% or less of Ca, with the balance made up of Al and unavoidable impurities.

TAKEMURA Hideki (SHOWA DENKO K.K. 7840, Aza Nagauchi, Kitakata-sh, Fukushima 45, 〒9660845, JP)
竹村　英貴 (〒45 福島県喜多方市字長内７８４０　昭和電工株式会社ショウティック事業部内 Fukushima, 〒9660845, JP)

JP2010/069255

May 05, 2011

October 29, 2010

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SHOWA DENKO K.K. (13-9, Shiba Daimon 1-chome Minato-k, Tokyo 18, 〒1058518, JP)
昭和電工株式会社 (〒18 東京都港区芝大門一丁目１３番９号 Tokyo, 〒1058518, JP)
TAKEMURA Hideki (SHOWA DENKO K.K. 7840, Aza Nagauchi, Kitakata-sh, Fukushima 45, 〒9660845, JP)

C22F1/043; B21J5/00; B21K1/18; B22D11/00; B22D11/04; B22D11/041; C22C21/02; F02F3/00; F16J1/01; C22F1/00

SHIMIZU Yoshihito et al. (Idemitsu Nagahori Building, 4-26 Minamisemba 3-chome, Chuo-ku, Osaka-sh, Osaka 81, 〒5420081, JP)

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