Method for surface treating a die by electron beam...

Details Method for surface treating a die by electron beam... Method for surface treating a die by electron beam...

2006-05-23

2006-05-23

Heckenberg, Donald (Department: 1722)

Electric heating

Metal heating

By arc

C219S121360, C219S121210, C249S135000

Reexamination Certificate

active

07049539

ABSTRACT:
Method for surface treating a die made of metal in which a low energy, pulsed electron beam, which does not scatter, performs a treatment over a wide area due to presence of anode plasma in a chamber in which the electron beam is formed to smooth and gloss a surface of the die and increase a surface hardness and corrosion resistance of the die. The irradiation may be performed with an energy density not less than 1 J/cm2per pulse, at least 5 pulse irradiations and a pulse duration of at least 1 μs. A die subjected to the surface treatment method exhibits improved surface smoothness and glossiness, as well as high corrosion resistance.

REFERENCES:
patent: 5859404 (1999-01-01), Wei et al.
patent: 6863531 (2005-03-01), Kensuke et al.

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