Metal treatment – Process of modifying or maintaining internal physical... – With vibration
Reexamination Certificate
2005-08-09
2005-08-09
Wyszomierski, George (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
With vibration
C148S605000
Reexamination Certificate
active
06926780
ABSTRACT:
The present invention relates to a method of surface treatment of metallic materials, more particularly, to a method of the surface self-nanocrystallization of metallic materials by the bombarding of supersonic fine particles. The method comprises the step of bombarding the surface of metallic substrate material with fine particles at supersonic speed of 300-1200 m/s carried by a compressed gas, which is ejected from a nozzle. The present method can be used for the surface self-nanocrystallization of metallic parts with a complicated structure or a large area, and the nanometer layer obtained is homogeneous. In addition, it can be operated in a simple way with low energy consumption, low cost, high efficiency of production and high surface nanocrystallization rate of from 1 cm2to 10 cm2/min.
REFERENCES:
patent: 2 689 431 (1993-10-01), None
Akamatsu et al., Nanocrystalline Layer Formation In A High-speed Tool Steel Surface By Repeated Intense Pulsed Ion Beam Irradiations(Abstract Only), Purazuma Oyo Kagaku, 9, 63-68, 2001, ISSN: 1340-3214, Publisher: Purazuma Oyo KagaKu Kenkyukai.
J. Mater. Sie. Technol. 1999, vol. 15(3): 193.
Chen Jinsheng
Jin Huazi
Li Ming
Li Tiefan
Wu Jie
Berman Charles
Greenberg & Traurig, LLP
Institute of Metal Research
Wyszomierski George
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