Method of treating surfaces of rotors of the screw type rotary m

Details Method of treating surfaces of rotors of the screw type rotary m Method of treating surfaces of rotors of the screw type rotary m

1991-04-03

1993-06-29

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

427305, 427319, 4273741, 4273742, 4273743, 4273881, 427438, 428612, 428614, 428622, 428623, 428626, 428679, 428680, 428936, C21D 922

Patent

active

052230520

ABSTRACT:
A method treating a surface of rotors in a screw-type rotary fluid machine, with the method comprising the steps of: conducting a non-electrolytic Ni plating on the surface of each rotor so as to form a first layer of non-electrolytic Ni plating layer; heating the rotor having the first layer at a temperature not lower than 500.degree. C.; and forming, at least, a second layer of an organic resin so as to cover the first layer.

REFERENCES:
patent: 4621026 (1986-11-01), Robinson
patent: 4666786 (1987-05-01), Yano et al.
patent: 5017410 (1991-05-01), Hodgens, II

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