Method of producing accurately scaled, well-defined surfaces of

Details Method of producing accurately scaled, well-defined surfaces of Method of producing accurately scaled, well-defined surfaces of

1983-04-29

1985-09-24

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412946, 204140, B23P 100, B23P 120

Patent

active

045431701

ABSTRACT:
The invention relates to a process for producing accurately scaled, well-defined surfaces of workpieces made from carbonaceous cast iron and having tribologic properties, more particularly of cylinders or internal combustion engines, said surfaces being subjected to at least two operating cycles consisting of an electrochemical and a subsequent mechanical removal. To obtain a constant surface quality, at least the last operating cycle is carried out in a specified ratio between the electrochemical and the mechanical removal and this is a fixed removal ratio. Preferably, a metal bearing plateau percentage of 40 to 65% of the surface is produced with the last operating cycle.

REFERENCES:
patent: 3945893 (1976-03-01), Ishimori et al.
patent: 4039399 (1977-08-01), Wallace et al.
patent: 4204924 (1980-05-01), Harifinger et al.

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