RU1836233C - Multilayer material for cutting tool - Google Patents

Abstract

SUMMARY OF THE INVENTION: the proposed material comprises a sintered carbide base and an adjacent layer of titanium oxycarbonitrides of composition T; CxOyNz at a ratio of 0.8 x + y + z 1.05, 1 with a thickness of 0.05-5 microns, on the layer of oxycarbonitrides there is a layer consisting of a solid solution of TIC and TICN 0.05-20 microns thick. moreover, its thickness exceeds the thickness of the oxycarbonitride layer. An alumina layer may additionally be applied to the TIC and TICN layer, and, in turn, a TIN layer may be applied to it. In addition, the surface of the carbide base may be enriched with a binder. 3 C.p.

Description

The invention relates to sintered carbide-based materials with wear-resistant coatings.

Coated cutting tools are widely used in the manufacturing industry, for example for the treatment of cast iron and cast iron alloys. Cutting inserts are known to have coatings consisting of one or more carbides, nitrides or carbonitrides of refractory metals.

TICO or TICON layers may be used as an intermediate layer between the base and the oxide layer.

The oxygen content in the intermediate layers is a favorable factor in enhancing the durability of the multilayer materials.

An object of the invention is to increase tool life.

The proposed multilayer material for a cutting tool, mainly an insert, contains a carbide base and an adjacent layer of titanium oxycarbonitrides of the composition JjCxOy Nz at. the ratio is 0.8 x + y + z 1.05 .1 with a thickness of 0.05-5 μm, on the layer of oxycarbonitrides is a layer consisting of a solid solution of TIC, TIN and TICN with a thickness of 0.05-20 μm, and its thickness exceeds the thickness of the layer hydroxycarbonitrides. An alumina layer can also be additionally applied to the TIC and TICN layer, and in turn, a TIN layer can be applied to it.

The proposed multilayer material also differs from the known one in that the surface of the carbide base can be enriched with a binder.

PRI me R 1. The cutting insert with a coating T1CQ + TIC in accordance with the declared

00

so o

With

with

with

a ratio of 4.7 microns thick was tested under the following conditions: cutting speed of 180 m / min, cutting depth of 1.5 mm, feed 0.1-0.3 mm / rev. The cutting edge is not damaged.

Example 2. A cutting insert with a surface of a carbide base enriched in a binder is coated with TiCO + TlC + AteOa + TlN.

Tests under the conditions described in Example 1 indicate an increased tool life - the cutting edge does not suffer damage after testing.

Example 3. A cutting insert with a carbide base surface not enriched with a binder has a TICO + TICN coating with a total thickness of 2 microns. Tests of the liner under the conditions described in Example 1 indicate weak damage.

Example 4. A cutting insert in which the surface of a carbide base is enriched with a binder was coated with a VCM TICCHTIN layer, in the latter of which, in the innermost layer adjacent to the TiCO layer, only a small amount of carbon was present. This TIN layer (with a small amount of C) and the TiCO layer had a total thickness of 20 μm. Tests of the liners under the conditions described in Example 1 showed that the liner suffered only minor damage.

A comparative analysis of the test results of the multilayer material for the cutting tool showed that the coated material (examples 1-3) has an increased resistance of at least 20 times. and in most cases in ZO.raz compared to a cutting element having a single TIC coating.

Formula of the invention

Claims (4)

1. A multilayer element for a cutting tool, preferably an insert, comprising a sintered carbide base and an adjacent layer of titanium oxycarbonitrides of the composition TlCxOyNz. characterized in that, in order to increase the tool life, the oxycarbonitride layer is made at a ratio of 0.8 x + y + z 1.05 where, 1, and has a thickness 0.05-5 microns, and on the oxycarbonitride layer there is a layer consisting of TIC and TICN solid solution 0.05-20 microns thick, moreover, its thickness exceeds the thickness of the oxycarbonitride layer. 2. An element according to claim 1, characterized in that an alumina layer is located on the layer of TIC and TiCN. 3. The element according to claim 1, wherein the TIN layer is located on the alumina layer. 4. An element according to claim 1, characterized in that the surface of the carbide base is enriched with a binder.