Method of generating a pattern in the surface of a workpiece

Details Method of generating a pattern in the surface of a workpiece Method of generating a pattern in the surface of a workpiece

1993-12-16

1995-11-21

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

378132, B23K 2614

Patent

active

054689325

ABSTRACT:
The invention relates to a method of generating a pattern of depressions in the surface of a workpiece, in particular one made of molybdenum or a molybdenum alloy for rotary-anode X-ray tubes. Such a method can be arranged in a more inexpensive and/or more environmentally friendly manner in that the workpiece is heated spotwise by a laser beam, the heating spot being directed over the surface in accordance with the pattern of depressions, in that a jet of oxygen is directed at the heating spot, and in that the energy supply to the heating spot is so controlled that the melting temperature of the workpiece material is not reached, while nevertheless the sublimation temperature of the oxide formed by the heating is exceeded.

REFERENCES:
patent: 5077775 (1991-12-01), Vetter
patent: 5204890 (1993-04-01), Anno et al.
patent: 5224142 (1993-06-01), Ono et al.
patent: 5248658 (1993-09-01), Yamazaki
Chemical Abstracts, vol. 105, 1986 p. 250, No. 101399.

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