RU78196U1 - MULTI-LAYER-CUTTING TOOL - Google Patents

Abstract

The utility model relates to the field of coating, in particular to coating by evaporation and condensation in vacuum, and is intended to obtain wear-resistant coatings on a cutting tool in tool production. The technical result is an increase in the resistance of the cutting tool. A cutting tool with a multilayer wear-resistant coating is proposed, containing a tool base and a three-layer wear-resistant ion-plasma coating deposited on it, the lower layer of which is used nitride or carbonitride of a compound of titanium, molybdenum and aluminum at their ratio, wt.%: Titanium 78.7- 79.9, molybdenum 7.0-7.3, aluminum 13.1-14.0; as an intermediate, nitride or carbonitride of a compound of titanium, molybdenum, chromium and aluminum, with their ratio, wt.%: titanium 78.4-79.8, molybdenum 4.6-4.8, chromium 6.9-7.5, aluminum 8.7-9.3; as the top, nitride or carbonitride of a compound of titanium, molybdenum and chromium at their ratio, wt.%: titanium 81.5-82.7, molybdenum 6.9-7.2, chromium 10.4-11.3.

Description

The utility model relates to the field of coating, in particular to coating by evaporation and condensation in a vacuum, and can be used in tool production to obtain wear-resistant coatings on a cutting tool.

Known cutting tool (RI) with a wear-resistant ion-plasma coating of titanium nitride TIN or titanium carbonitride TiCN, 3-8 μm thick (see Tabakov V.P. Performance of cutting tools with wear-resistant coatings based on complex nitrides and titanium carbonitrides. Ulyanovsk: UlSTU , 1998.123 s.).

The reasons that impede the achievement of the technical result indicated below when using a known coated cutting tool include the fact that in the known coated cutting tool, the applied coating has a relatively low hardness, level of compressive stresses and insufficient adhesion to the tool base. As a result of this, the coating undergoes more wear and tear, cracks quickly nucleate and propagate in it, leading to the destruction of the coating, which reduces the resistance of the RI with the coating.

The closest cutting tool with a coating of the same purpose to the claimed utility model according to the totality of features is a cutting tool with a multilayer coating containing a tool base and a multilayer ion-plasma wear-resistant coating, consisting of an upper layer of nitride of a compound of titanium, molybdenum and chromium

TiMoCrN and the lower nitride layer of the titanium, molybdenum and aluminum compound TiMoAlN (Utility Model Patent RU 59581 U1), adopted as a prototype.

For reasons that impede the achievement of the technical result indicated below when using a known coated cutting tool adopted as a prototype, the multilayer coating in the known RI coated has insufficient hardness and, therefore, crack resistance. As a result, the coating poorly resists the processes of wear and tear and quickly collapses when cutting.

The technical result is an increase in the resistance of the cutting tool.

The specified technical result in the implementation of the utility model is achieved by the fact that in the known cutting tool with a coating, the nitride or carbonitride of a compound of titanium, molybdenum and aluminum is used as the lower coating layer, wt.%: Titanium 78.7-79.9, molybdenum 7.0-7.3; aluminum 13.1-14.0; as an intermediate, nitride or carbonitride of a compound of titanium, molybdenum, chromium and aluminum, with their ratio, wt.%: titanium 78.4-79.8, molybdenum 4.6-4.8, chromium 6.9-7.5, aluminum 8.7-9.3; as the top, nitride or carbonitride of a compound of titanium, molybdenum and chromium at their ratio, wt.%: titanium 81.5-82.7, molybdenum 6.9-7.2, chromium 10.4-11.3.

An analysis of the prior art by the applicant, including a search by patent and scientific and technical sources of information and identification of sources containing information about analogues of the claimed utility model, allowed to establish that the applicant did not find a source characterized by features identical to all the essential features of the claimed utility model, determined from a list of identified prototype analogues, as

the analogue closest in the totality of features made it possible to establish the set of distinguishing features that are significant with respect to the technical result perceived by the applicant in the claimed cutting tool with a wear-resistant coating, set forth in the utility model formula.

Therefore, the claimed utility model meets the condition of "novelty."

Information confirming the possibility of implementing a utility model with obtaining the above technical result.

The essence of the utility model is as follows. In the proposed carbide cutting tool 1, a multilayer coating is applied to the surface, consisting of a lower layer 2 containing a nitride or carbonitride of a compound of titanium, molybdenum and aluminum; an intermediate layer 3 comprising a nitride or carbonitride of a compound of titanium, molybdenum, chromium and aluminum; the top layer 4 containing a nitride or carbonitride compound of titanium, molybdenum and chromium.

The coatings were applied by the CIB method (condensation from the plasma phase in vacuum with ion bombardment). Non-grind plates preliminarily cleaned of contaminants made of MK8 hard alloy were placed in the chamber of the Bulat-6T installation with electric arc evaporators installed in it, the cathode materials of which include coating elements. The nitride-based coating was carried out in a nitrogen medium, and the carbonitride-based coating was carried out in a mixture of nitrogen and acetylene.

The coating thickness was 6 μm. The thickness of each layer of the three-layer coating was 2 μm.

The microhardness of the coatings was determined on a PMT-3 microhardness tester.

The adhesion strength of the coating to the tool material was evaluated by pressing a diamond indenter on a TK-2M hardness tester with a load of 600 N. The criterion for assessing the adhesion-strength properties of the coating-tool material composition was the peeling coefficient, defined as the ratio of the peeling area of the coating to the indenter imprint area.

Durable tests of the cutting tool were carried out with the longitudinal turning of blanks made of 30KhGSA steel on a 16K20 lathe. Cutting modes: cutting speed V = 180 m / min, feed S = 0.15 mm / rev, cutting depth t = 0.5 mm, processing was performed without the use of coolant. For the criterion of wear was taken the value of the chamfer of wear on the rear surface: h ₃ = 0.4 mm

In the table. 1 shows the test results of RI with the obtained coatings.

Table 1
Coated RI Test Results Coating material The chemical composition of the coating layers (ratio of metal components),% wt. Peeling ratio Microhardness, GPa Resistance, min Note 1 layer 2 layer 3 layer Ti Mo Al Ti Mo Al Cr Ti Mo Cr TiN - 1.16 29.2 45 Analogue TiMoAlN-TiMoCrN 79,4 7.1 13.5 - 82,2 7.0 10.8 1.29 40.5 183 Prototype TiMoAlN-TiMoCrFeN-TiMoCrN 79,4 7.1 13.5 80.6 4.7 9.0 5.7 84.5 7.0 8.5 1.29 43.0 231 81.4 7.1 11.5 80,4 4.7 7.7 7.2 82,2 7.0 10.8 1.36 43.7 256 79,4 7.1 13.5 79.1 4.7 9.0 7.2 82,2 7.0 10.8 1.29 45.3 281 76.9 7.1 16,0 77.4 4.7 10.7 7.2 82,2 7.0 10.8 1.40 43.8 260 79,4 7.1 13.5 77.6 4.7 9.0 8.7 80.0 7.0 13.0 1.29 43.1 233 TiMoAlCN-TiMoCrFeCN-TiMoCrCN 79,4 7.1 13.5 80.6 4.7 9.0 5.7 84.5 7.0 8.5 1.42 46.5 262 81.4 7.1 11.5 80,4 4.7 7.7 7.2 82,2 7.0 10.8 1,58 47.8 281 79,4 7.1 13.5 79.1 4.7 9.0 7.2 82,2 7.0 10.8 1.42 50,4 299 76.9 7.1 16,0 77.4 four, 10.7 7.2 82,2 7.0 10.8 1,61 48.1 285 79,4 7.1 13.5 77.6 4.7 9.0 8.7 80.0 7.0 13.0 1.42 46.5 263

As can be seen from the table. 1 data, the resistance of the plates with the proposed multilayer coatings is increased by 1.3-1.6 times compared with the tool with a coating of the prototype.

Thus, the above information indicates the fulfillment of the following set of conditions when using the declared cutting tool with a wear-resistant coating:

- a tool embodying the claimed cutting tool with a wear-resistant coating in its implementation, is intended for use in industry, namely in the field of coating, in particular in the field of coating by evaporation and condensation in a vacuum, and can be used in tool production for wear-resistant coatings on a cutting tool;

- for the declared cutting tool with a wear-resistant coating in the form described in the independent clause of the stated utility model formula, the possibility of its implementation using the means and methods described in the application or known prior to the priority date is confirmed;

- a tool that embodies the claimed utility model in its implementation, is able to ensure the achievement of the perceived by the applicant technical result.

Therefore, the claimed utility model meets the condition of "industrial applicability".

Claims (1)

A cutting tool with a multi-layer wear-resistant coating, containing the tool base and a three-layer wear-resistant ion-plasma coating deposited on it, the lower layer of which is used nitride or carbonitride of a compound of titanium, molybdenum and aluminum in their ratio, wt.%: Titanium 78.7-79 9, molybdenum 7.0-7.3, aluminum 13.1-14.0; as an intermediate, nitride or carbonitride of a compound of titanium, molybdenum, chromium and aluminum, with their ratio, wt.%: titanium 78.4-79.8, molybdenum 4.6-4.8, chromium 6.9-7.5, aluminum 8.7-9.3; as the top, nitride or carbonitride of a compound of titanium, molybdenum and chromium at their ratio, wt.%: titanium 81.5-82.7, molybdenum 6.9-7.2, chromium 10.4-11.3.