Coated cemented carbide body and method of making such a body

Details Coated cemented carbide body and method of making such a body Coated cemented carbide body and method of making such a body

1978-06-06

1979-12-25

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

427253, 427255, 427248B, 428546, 428469, 75208R, 75204, B22F 500

Patent

active

041804007

ABSTRACT:
An improved sintered cemented carbide body and method for making same is disclosed. The improved sintered cemented carbide body contains at least one metal carbide and a binder metal, on which body there is applied at least one thin, wear resistant surface layer consisting essentially of aluminum oxide and is characterized in that at least 85% of the aluminum oxide consists of the kappa form, the remainder, which mainly constitutes the alpha form, being formed as surface portions or spots having a size of at the most 10 .mu.m, the size and the occurrence of the surface portions being so adjusted that they lie within the area AOB in FIG. 1 of the attached drawing.
The body is made by a method wherein a cemented carbide substrate is contacted with a gas containing an aluminum halide and a reducing agent at high temperature, characterized in that a dopant addition of tetravalent titanium, zirconium and/or hafnium ions is added to the gas in an amount of 0.03-0.5% of the totally supplied amount of gas.

REFERENCES:
patent: 3967035 (1976-06-01), Hale
patent: 3999954 (1976-12-01), Kolaska et al.
patent: 4018631 (1977-04-01), Hale
patent: 4052530 (1977-10-01), Fonzi

Affiliated with

Also associated with

Rating

Coated cemented carbide body and method of making such a body does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coated cemented carbide body and method of making such a body, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coated cemented carbide body and method of making such a body will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2069261