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US 2008/0276771 A1Published application
Method For Hardening A Machined Article
AssigneeAir Products and Chemicals, Inc.
InventorsRanajit Ghosh, Daniel James Gibson
Life of this patent
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Abstract
A machining method and an article manufactured therefrom, the method improving mechanical properties in a work surface by performing a very shallow machining pass using a cutting tool, in combination with application of a cryogenic fluid to the work surface and the cutting tool, the combination compressive force and cryogenic cooling increasing hardness, increasing compressive residual stress, and reducing surface roughness in the manufactured article.
Claims18
A method of machining a work surface, the method comprising:
- performing a first machining pass on at least a portion of the work surface using a first cutting tool positioned at a skim depth that is no greater than −254 μm;
- and
- cooling the at least a portion of the work surface with a cryogenic fluid while the first machining pass is being performed.
A method of machining a work surface, the method comprising:
- performing a first machining pass on at least a portion of the work surface using a first cutting tool positioned at a skim depth that is no greater than −12.7 μm;
- cooling the work surface with a cryogenic fluid for a predetermined period of time immediately prior to performing the first machining pass;
- cooling the first cutting tool and the at least a portion of the work surface with the cryogenic fluid while the first machining pass is being performed.
Dependencies are inferred from the claim text.