Method of forming chilled layer

Details Method of forming chilled layer Method of forming chilled layer

1991-03-04

1992-05-19

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Surface melting

21912116, 21912165, 21912166, 219123, 219 7615, 219 7614, 148565, 148572, 148903, 148904, C21D 109

Patent

active

051144999

ABSTRACT:
The surface of a metal workpiece is remelted by a heat producing energy beam so as to form a molten metal layer thereon. While remelting the surface, a magnetic field is generated coaxially with the energy beam and is applied across the molten metal layer so as to cause the heat energy to flare and, thereby, produce a Lorentz force in the molten metal layer. By the Lorentz force, the molten metal is agitated. The heat energy and magnetic field are oscillated, or reciprocally moved, relative to the surface so as to cause a flow of the molten metal from the edges of the molten metal layer toward the center, thereby providing a uniform chilled layer thickness.

REFERENCES:
patent: 4190760 (1980-02-01), Kano et al.
patent: 4652724 (1987-03-01), Morita et al.
Applicant's Admission on p. 2, Line 13 to p. 3, Line 2 (Japanese Unexamined Patent Publication No. 6-258421).

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