Aluminum oxide coated cutting tool and method of manufacturing t

Details Aluminum oxide coated cutting tool and method of manufacturing t Aluminum oxide coated cutting tool and method of manufacturing t

1994-12-29

1998-06-16

Speer, Timothy

Stock material or miscellaneous articles

Composite

Of inorganic material

428699, 4289088, 407119, 51307, 51309, B32B 904

Patent

active

057667829

ABSTRACT:
A body such as a cutting tool coated with refractory single- or multilayers, wherein specific layers are characterized by a controlled microstructure and phase composition with crystal planes preferably grown in a preferential direction with respect to the surface of the coated body. The coating includes one or several refractory layers of which at least one layer is a dense, fine-grained layer of .alpha.-Al.sub.2 O.sub.3 preferably textured in the (104) direction. The coated tool exhibits excellent surface finish and shows much improved wear and toughness properties compared to prior art objects when used for machining steel, cast iron and, particularly, when machining nodular cast iron.

REFERENCES:
patent: 3967035 (1976-06-01), Hale
patent: 4341834 (1982-07-01), Kikuchi
patent: 5123934 (1992-06-01), Katayama et al.
patent: 5162147 (1992-11-01), Ruppi
patent: 5487625 (1996-01-01), Ljungberg

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