Titanium-based carbonitride alloy with improved thermal shock re

Details Titanium-based carbonitride alloy with improved thermal shock re Titanium-based carbonitride alloy with improved thermal shock re

1998-05-11

1999-11-02

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75237, 419 10, 419 47, 419 56, C22C 2904

Patent

active

059762136

ABSTRACT:
A titanium-based carbonitride cutting tool insert with superior thermal shock resistance is disclosed. This is accomplished by sintering the material under conditions where the melting process is reversed. The melt forms in the center of the material first and the melting front propagates outwards towards the surface. This leads to minimal porosity and a macroscopic cobalt depletion towards the surface. The cobalt depletion, in turn, leads to a favorable compressive residual stress in the surface zone.

REFERENCES:
patent: 4769070 (1988-09-01), Tobioka et al.
patent: 4985070 (1991-01-01), Kitamura et al.
patent: 5145505 (1992-09-01), Saito et al.
patent: 5856032 (1999-01-01), Daub et al.

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