Coated tool and method of manufacturing the same

Details Coated tool and method of manufacturing the same Coated tool and method of manufacturing the same

1997-11-20

1999-11-09

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

51295, 51307, 51309, 4272481, 4272552, 4272553, 4272557, 427585, 428212, 428336, 428457, 428469, 428472, 428697, 428698, 428699, 428701, 428702, 2041921, 20419215, 20419216, B32B 702

Patent

active

059810491

ABSTRACT:
A coated tool includes a base material and a wear-resistant coating film formed on the base material. The composition of the wear-resistant coating film is expressed as (Ti.sub.x,Al.sub.y,V.sub.z)(C.sub.u,N.sub.v,O.sub.w). Relations x+y+z=1, u+v+w=1, 0.2<x<1, 0.ltoreq.y<0.8, 0.02.ltoreq.z<0.6, 0.ltoreq.u<0.7, 0.3<v.ltoreq.1 and 0.ltoreq.w<0.5 hold between x, y, z, u, v and w. The thickness of the wear-resistant coating film is at least 0.5 .mu.m and not more than 15 .mu.m. A coated cutting tool in particular includes a base material consisting of cemented carbide and a wear-resistant coating film formed on the surface of the base material. The wear-resistant coating film includes a titanium nitride film which is formed to be in contact with the surface of the base material, and a composite nitride film, formed on the titanium nitride film, containing titanium, vanadium, nitrogen and an unavoidable impurity or titanium, aluminum, vanadium, nitrogen and an unavoidable impurity, or a composite carbo-nitride film, formed on the titanium nitride film, containing titanium, vanadium, carbon, nitrogen and an unavoidable impurity or titanium, aluminum, vanadium, carbon, nitrogen and an unavoidable impurity. The outermost surface of the wear-resistant coating film is coated with a low melting point oxide, containing vanadium oxide, having a melting point of not more than 1000.degree. C.

REFERENCES:
patent: 4284687 (1981-08-01), Dreyer et al.
patent: 4447263 (1984-05-01), Sugizawa et al.
patent: 4714660 (1987-12-01), Gates, Jr.
patent: 4753854 (1988-06-01), Gavrilov et al.
patent: 4842710 (1989-06-01), Freller et al.
patent: 5208102 (1993-05-01), Schulz et al.
Growth of single-crystal TiN/VN strained-layer superlattices with extremely high mechanical hardness; U. Helmersson et al.; pp. 481-484; J.Appl.Phys., 62(w) Jul. 15, 1987.

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