| US 7,574,888 B2 | ||
| Method of working metal, metal body obtained by the method and metal-containing ceramic body obtained by the method | ||
| Zenji Horita, Fukuoka (Japan); Katsuaki Nakamura, Fukuoka (Japan); Koji Neishi, Fukuoka (Japan); Michihiko Nakagaki, Fukuoka (Japan); and Kenji Kaneko, Fukuoka (Japan) | ||
| Assigned to Rinascimetalli Ltd., Fukuoka (Japan) | ||
| Filed on Dec. 19, 2007, as Appl. No. 12/2,967. | ||
| Application 12/002967 is a division of application No. 10/529807, previously published as PCT/JP03/12440, filed on Sep. 29, 2003. | ||
| Claims priority of application No. 2002-285476 (JP), filed on Sep. 30, 2002; application No. 2003-048844 (JP), filed on Feb. 26, 2003; and application No. 2003-064161 (JP), filed on Mar. 10, 2003. | ||
| Prior Publication US 2008/0110227 A1, May 15, 2008 | ||
| Int. Cl. B21D 37/16 (2006.01) | ||
| U.S. Cl. 72—342.94 [72/710; 148/558] | 10 Claims |
| 1. A method of working metal comprising the following steps:
locally reducing the deformation resistance of a metal body extending in one direction;
forming a first low deformation resistance region and a second low deformation resistance region crossing the metal body with
a preset interval;
subjecting the first low deformation resistance region and the second low deformation resistance region to shear deformation,
thereby making the microstructure of the metal body fine; and
vibrating a non-low deformation resistance region sandwiched between the first low deformation resistance region and the second
low deformation resistance region along a direction approximately orthogonal to the extending direction of the metal body.
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