Electrochemical hardness modification of non-allotropic metal su

Details Electrochemical hardness modification of non-allotropic metal su Electrochemical hardness modification of non-allotropic metal su

1995-07-10

2000-10-31

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Surface melting

148522, 148565, 204164, C21D 109

Patent

active

061396567

ABSTRACT:
An electrochemical method of modifying the surface hardness of a non-allotropic metal member 10, comprising: (a) forming the member to near net-shape with at least one surface 12 to be hardened; (b) subjecting the surface 12 to rapid melting and resolidification by incidence of an electrical discharge between an electrode 16 and the surface 12 closely spaced thereto, the spacing containing an electrolyte with plasma forming capability, the surface 12 being hardened by crystallographic change of the globules resulting from substitutional alloying; and (c) cropping the surface grains 29 of the surface to increase load bearing capacity while retaining liquid retention capacity.

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patent: 5480497 (1996-01-01), Zaluzec et al.

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