RU59611U1 - 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 a 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 two-layer wear-resistant ion-plasma coating deposited on it, the lower layer of which is used nitride or carbonitride of a compound of titanium, aluminum and iron in their ratio, wt.%: Titanium 83.7- 85.2, aluminum 13.0-14.2, iron 1.8-2.1; as the top, nitride or carbonitride of the titanium, aluminum and silicon compounds at their ratio, wt.%: titanium 84.8-86.0, aluminum 13.0-14.0, silicon 1.0-1.2.

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 a cutting tool 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 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 a combination 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 titanium, aluminum and silicon compound nitride

TiAlSiN and the lower nitride layer of the titanium and aluminum compound TiAlN (see. Decision on the grant of a patent for utility model No. 2005134103/22 (038135)) adopted as a prototype.

For reasons that impede the achievement of the technical result indicated below when using the known coated cutting tool adopted as a prototype, the multilayer coating in the known RI coated contains a TiAlN layer having low hardness and insufficient adhesion to the tool base. As a result, the coating poorly resists the processes of wear and tear and quickly collapses when cutting. Therefore, the coating should consist of an upper layer with maximum hardness and a lower layer with maximum hardness with maximum adhesion to the tool base.

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, aluminum and iron is used as the lower coating layer, in their ratio, wt.%: Titanium 83.7-85.2, aluminum 13.0-14.2, iron 1.8-2.1; as the top, nitride or carbonitride of the titanium, aluminum and silicon compounds at their ratio, wt.%: titanium 84.8-86.0, aluminum 13.0-14.0, silicon 1.0-1.2.

The 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 the list of identified analogues of the prototype, as the closest analogue in terms of characteristics, it was possible to establish a set of distinctive features that are essential for the applicant as seen 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, aluminum and iron; the top layer 3 containing a nitride or carbonitride compound of titanium, aluminum and silicon.

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 microhardness of the coatings was determined on a PMT-3 microhardness meter under a load of 100 g.

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. For the evaluation criterion

the adhesion-strength properties of the composition “coating - tool material” adopted 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 billets 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 wear criterion, the value of the chamfer of wear on the rear surface was taken: h ₃ = 0.4 mm.

Table 1 shows the test results of RI with the obtained coatings.

As can be seen from the data in table 1, the resistance of plates with multilayer coatings increases by 1.3-1.6 times in comparison with a tool with a coating 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;

Table 1
Coated RI Test Results No pp Coating material The chemical composition of the coating layers (ratio of metal components),% wt. Peeling ratio Microhardness, GPa The thickness of the coating layers, microns Resistance, min Note 1 layer 2 layer 1 layer 2 layer Ti Al Fe Ti Al Si one 2 3 four 5 6 7 8 9 10 eleven 12 13 fourteen one TiN - 1.16 29.2 5 - 45 Analogue 2 TiAlN-TiAlSiN - 0.91 42.1 2,5 2,5 166 Prototype 3 TiAlFeN-TiAlSiN 84,4 13.6 2.0 85.6 13.5 0.9 0.78 43.1 2,5 2,5 217 - four TiAlFeN-TiAlSiN 85.0 13.6 1.4 85,4 13.5 1,1 0.88 44,2 2,5 2,5 231 - 5 TiAlFeN-TiAlSiN 84,4 13.6 2.0 85,4 13.5 1,1 0.78 46.1 2,5 2,5 247 - 6 TiAlFeN-TiAlSiN 83.8 13.6 2.6 85,4 13.5 1,1 0.86 44,4 2,5 2,5 227 - 7 TiAlFeN-TiAlSiN 84,4 13.6 2.0 85,2 13.5 1.3 0.78 43,2 2,5 2,5 219 - 8 TiAlFeCN-TiAlSiCN 84,4 13.6 2.0 85.6 13.5 0.9 1.28 45,2 2,5 2,5 233 - 9 TiAlFeCN-TiAlSiCN 85.0 13.6 1.4 85,4 13.5 1,1 1.46 46.5 2,5 2,5 239 - 10 TiAlFeCN-TiAlSiCN 84,4 13.6 2.0 85,4 13.5 1,1 1.28 49.7 2,5 2,5 268 - eleven TiAlFeCN-TiAlSiCN 83.8 13.6 2.6 85,4 13.5 1,1 1.51 46.9 2,5 2,5 244 - 12 TiAlFeCN-TiAlSiCN 84,4 13.6 2.0 85,2 13.5 1.3 1.28 46.3 2,5 2,5 236 -

- 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 multilayer wear-resistant coating, containing the tool base and a two-layer wear-resistant ion-plasma coating deposited on it, the lower layer of which is used nitride or carbonitride of a compound of titanium, aluminum and iron at their ratio, wt.%: Titanium 83.7-85 , 2, aluminum 13.0-14.2, iron 1.8-2.1; as the top, nitride or carbonitride of the titanium, aluminum and silicon compounds at their ratio, wt.%: titanium 84.8-86.0, aluminum 13.0-14.0, silicon 1.0-1.2.