JPS59170261A - Surface-coated tool member with superior wear resistance - Google Patents

Abstract

PURPOSE:To improve the wear resistance and cutting performance of an iron alloy tool member by forming a coating layer having a structure contg. diamond particles dispersed in a prescribed hard compound layer on the surface of the tool member. CONSTITUTION:A coating layer contg. diamond particles dispersed in a hard compound layer is formed on the surface of an alloy tool member to obtain the titled member. The diamond particles are formed by a vapor phase synthesis method. The hard compound layer is a single layer of one kind of compound selected among the carbides, nitrides, carbonitrides and oxycarbonitrides of the IVa, Va and VIa group metals in the periodic table, Si and B or a double layer of two or more kinds of compounds selected among said compounds. Said alloy tool member contains at least one kind of iron group metal as the principal component. The titled member has superior wear resistance and cutting performance.

Description

[Detailed description of the invention] This invention has excellent wear resistance, cutting, wear resistance,
and a surface-coated tool member suitable for use in the field of grinding.

Conventionally, for example, hard dispersed phases manufactured by powder metallurgy are mainly elements 4a and 5a of the periodic table.

and group 6a metals, and carbides and nitrides of Si.

One or more carbonitrides and carbonitrides are composed of two or more, while the binder phase is mainly composed of iron group metals and one or more of the metals of groups 5a and 6a. 4 on the surface of the constructed ultra-hard alloy base tool member.
A hard material composed of a single layer or a multilayer of two or more of metals of groups a, 5a, and 6a, and carbides, nitrides, carbonitrides, and carbonitrides of Si and B. It is well known that a surface-coated superhard alloy member formed by forming a surface coating layer made of a compound layer using a chemical vapor deposition method, a physical vapor deposition method, or the like is used as a cutting tool.

However, although such conventional surface-coated cemented carbide members exhibit relatively excellent cutting performance when cutting steel or cast iron, they do not work well when cutting steel or cast iron. In the case of a calcined body, the desired cutting life was not exhibited due to insufficient wear resistance.

Therefore, from the above-mentioned viewpoint, the present inventors particularly
As a result of conducting research to obtain all tool members suitable for use as cutting tools for cutting work materials such as RP and ceramic calcined bodies, we found that the base tool member contains at least one type of iron group metal as a main component. alloys, i.e., Fe-based alloys, N1-based alloys,
4: or a CO-based alloy, and the surface coating layer formed on the surface of this base tool member is formed by chemical vapor deposition method, physical vapor deposition method, etc. 4a, 5a of the periodic table of elements,
and Group 6a metals, and 81 and B carbides, nitrides.

It has a structure in which diamond particles formed by vapor phase synthesis are dispersed in a hard compound layer consisting of a single layer or a multilayer of two or more of carbonitrides and carbonitrides. This surface-coated tool member has extremely excellent wear resistance due to the diamond grains dispersed in the surface coating layer, and therefore, when used as a cutting tool, it can be used not only on steel and cast iron but also on steel and cast iron. About F.
It exhibits excellent cutting performance when cutting work materials such as RP and ceramic calcined bodies, and also has excellent wear resistance, so it is suitable for metal hot processing, metal forming parts, dies, etc. They found that it also exhibits excellent performance when used as a wear-resistant tool or as a grinding tool for grinding wheels, lamp plates, etc.

The present invention was made based on the above knowledge, and the surface of an alloy-based tool member containing at least one of the iron group metals as a main component is coated by chemical vapor deposition, physical vapor deposition, etc. A single layer or two or more of metals of groups 4a, 5a, and 6a of the Periodic Table of the Elements, and carbides, nitrides, carbonitrides, and carbonitrides of KSi and B formed. It is made by forming a surface coating layer with a structure in which diamond particles formed by vapor phase synthesis are dispersed in a hard compound layer composed of multiple layers, and is especially used as cutting tools, wear-resistant tools, and grinding tools. The present invention is characterized by a surface-coated tool member suitable for. .

Note that the diamond grains in the surface coating layer of this invention are W, Mo,
Alternatively, it may contain about 1 to 10 atomic percentages as total impurities such as Ta.

Next, the surface-coated tool member of the present invention will be specifically explained using examples.

Example (As the base tool members, cutting tips having the compositions shown in Table 1 and having the shape of TIS-SNP431 were prepared, and these base tool members were subjected to normal Using gas phase synthesizer sound, reactor, quartz tube with inner diameter of 75 mm, heating temperature of W filament: 2k) O0℃, distance between cutting tip and W filament: 3.5 on, reaction flowing into the reactor. Gas: CH3/Hz-o by volume ratio
, oo5 mixed gas, atmospheric pressure in the reactor kept at 20 torr during the reaction,
The reaction time was 3 to 10 hours, and a normal magnetron sputtering device was used.Target material: The same compound as the compound forming the entire hard compound layer shown in Table 1. Atmosphere inside reactor = 2×
Ar of 1σ2 torr.

Chemical vapor deposition treatment was performed alternately under the following conditions: voltage applied to the target at knee *40 OV, heating temperature of the cutting tip at 2500°C, reaction time: 1 to 3 hours.
By forming on the surface of the cutting tip a surface coating layer having a structure in which diamond particles are dispersed in a hard compound consisting of a compound shown in the table and a single-layer multilayer with an average layer thickness, Cutting chips 1 to 12 were manufactured, respectively.

For the purpose of comparison, diamond grains were not formed by vapor phase synthesis, and only the chemical vapor deposition treatment by magnetron sputtering described above was applied to the surface of the cutting tip having the composition No. 1M, and the results were also shown in Table 1. By forming a surface coating layer consisting of a hard compound layer and a single layer or multiple layers with an average layer thickness, conventionally coated cutting tips 1 to 5
were manufactured respectively.

At the same time, the resulting coated cutting chips 1 to 1 of the present invention
2 and conventional coated cutting tips 1 to 5, Work material: FRP, Cutting speed: 50 tn/m1n1, Feed: 0.
A continuous cutting test was conducted under the following conditions: 2 m+n/rev, depth of cut, 1 cylinder, cutting time: iom=, and the flank wear width of the cutting edge was measured. The measurement results are shown in Table 1.

From the results shown in Table 1, the coated cutting tips 1 to 1 of the present invention
12 has extremely excellent wear resistance, so FRP
It is clear that the cutting tip exhibits superior cutting performance over a long period of time compared to conventional coated cutting tips.

As shown in the above series, the surface-coated tool part of the present invention has excellent wear resistance due to the diamond grains dispersed in the surface coating layer, so it can be used not only for steel and cast iron, but also for FRP, ceramic calcined bodies, Furthermore, it is not only suitable for use as a cutting tool for cutting work materials such as M and M alloys, but also exhibits excellent performance over a long period of time when used as a wear-resistant tool or a grinding tool. .

Applicant: Mitsubishi Metals Corporation Agent Tomi 1) Kazuo and 1 other person

Claims (1)

[Claims] 4a and 5a, which are also periodic elements, are applied to the surface of an alloy-based tool member containing at least one of the iron group metals as a main component.
, and metals of group 6a, and carbides of 81 and B,
A structure in which diamond particles are formed by vapor phase synthesis in a hard compound layer consisting of a single layer or a multilayer of two or more of nitrides, carbonitrides, and carbonitrides is formed. A surface-coated tool member with excellent wear resistance formed by forming a surface coating layer comprising: