Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Reexamination Certificate
2005-02-22
2005-02-22
Padgett, Marianne (Department: 1762)
Coating processes
Direct application of electrical, magnetic, wave, or...
Pretreatment of substrate or post-treatment of coated substrate
C427S556000, C427S597000, C219S121640, C219S121800, C219S121840
Reexamination Certificate
active
06858262
ABSTRACT:
The invention relates to a method for manufacturing a surface-alloyed cylindrical, partly cylindrical or hollow cylindrical structural member where in the zone of incidence of the energy beam there is formed a locally bounded melting bath with a heating and melting front, a solution zone and a solidification front. At the side of the energy beam the hard material powder is deposited via a conveyor device in the direction of gravity and is supplied co-ordinated with the feed movement of the workpiece in a width which corresponds to the width of the linear focus and a layer height of 0.3-3 mm is thereby produced. The hard-material powder supplied to the workpiece surface in the heating front of the melting bath is heated by an energy beam at a wavelength of 780-940 nm and in contact with the liquefied matrix alloy the powder is immediately dissolved in the melting bath. Convection is produced in the solution zone by the energy beam having a specific power of at least 104W/cm2, so that the homogenization process in the melting zone is accelerated, where the linear focus acts on the solution zone until the hard material powder is uniformly distributed in the melting bath. In front of the energy beam the uniformly distributed powder material, which has gone into solution metallurgically in the solution zone, is subjected to directional solidification in the solidification front at a high cooling rate of 200-600 K/s at a feed rate of 500-10,000 mm/min. The invention also relates to a device for implementing the method, consisting of a workpiece clamping device, on which a workpiece is aligned and clamped above index holes and/or above working surfaces, onto whose surface a powder supply and a focusable beam from a beam head are directed.
REFERENCES:
patent: 4832982 (1989-05-01), Mori et al.
patent: 5038014 (1991-08-01), Pratt et al.
patent: 5405660 (1995-04-01), Psiuk et al.
patent: 5431967 (1995-07-01), Manthiram et al.
patent: 5447910 (1995-09-01), Hayashi et al.
patent: 5837960 (1998-11-01), Lewis et al.
patent: 6203861 (2001-03-01), Kar et al.
patent: 6221175 (2001-04-01), Kurz et al.
patent: 6284067 (2001-09-01), Schwartz et al.
patent: 6299707 (2001-10-01), McCay et al.
patent: 6303897 (2001-10-01), Bady et al.
patent: 6316065 (2001-11-01), Wallmann
patent: 6390050 (2002-05-01), Feikus
patent: 6548125 (2003-04-01), Warnecke
patent: 6575130 (2003-06-01), Feikus
patent: 6713191 (2004-03-01), Feikus et al.
patent: 6797916 (2004-09-01), Feikus
patent: 20020153359 (2002-10-01), Feikus
patent: 20040099644 (2004-05-01), Allen
patent: 197 11 232 (1998-04-01), None
patent: 198 17 091 (1999-10-01), None
patent: 357185927 (1982-11-01), None
patent: 361074326 (1986-04-01), None
patent: WO 97 10067 (1997-03-01), None
patent: WO 98 56566 (1998-12-01), None
Feikus Franz Josef
Fischer Alexander
Kahn Joachim
Padgett Marianne
Proskauer Rose LLP
VAW aluminium AG
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