Machining of aluminum surfaces

Details Machining of aluminum surfaces Machining of aluminum surfaces

2008-01-24

2011-11-15

Howell, Daniel W. (Department: 3726)

Cutting by use of rotating axially moving tool

Processes

Bit detachable

C408S056000

Reexamination Certificate

active

08057133

ABSTRACT:
Machining of aluminum workpieces with diamond or diamond-like carbon-surface coated tools may be conducted in an atmosphere containing hydrogen gas at a partial pressure effective for hydrogen to react with carbon atoms at the surface to form C—H bonds that resist adherence of aluminum to the tool surface. Suitably, hydrogen or a hydrogen-containing gas mixture is confined at the interface of tool and workpieces at the machining site. Hydrogen partial pressure may be determined for a tool-workpiece-machining temperature combination by calculation or experiment.

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Konca, E., Cheng, Y. -T., Weiner, A. M., Dasch, J. M. & Alpas, A. T. (2007). The Role of Hydrogen Atmosphere on the Tribological Behavior of Non-Hydrogenated DLC Coatings against Aluminum. Tribology Transactions, 50(2), 178-186.
Yue Qi, Erkan Konca, Ahmett T. Alpas; “Atmospheric effects on the adhesion and friction . . . ”; Publication; May 2, 2006; Surface Science 600 (2006); pp. 2955-2965.
International Search Report for Application No. PCT/US2009/030902 dated Aug. 31, 2009.
Written Opinion of the International Searching Authority for application No. PCT/US2009/030902 dated Aug. 31, 2009.

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