JPS59170262A - 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 consisting of a diamond layer and prescribed hard compound layers laminated alternately on the surface of the tool member. CONSTITUTION:A coating layer consisting of at least one diamond layer and hard compound layers laminated alternately is formed on the surface of an alloy tool member to obtain the titled member. The diamond layer is formed by a vapor phase synthesis method. Each of the hard compound layers 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 produced by powder metallurgy are mainly composed of elements 4a and 5a of the periodic table.

and 6a group metals, and one or more of fEi carbides, nitride carbonitrides, and carbonitrides, while the binder phase is mainly composed of iron group metals, and fEi group 5a and 6a metals. The same 4a,
Consists of a hard compound layer composed of a single layer or a multilayer of two or more of metals of Groups 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 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 a tool part suitable for use as a cutting tool for cutting work materials such as RP and ceramic calcined bodies, it was found that the base tool part was made mainly of at least one type of iron group metal. Alloys as components, namely Fe-based alloys, Ni-based alloys,
Or, the surface coating layer formed on the surface of this base tool member is formed by a chemical vapor deposition method, a physical vapor deposition method, etc. and at least one diamond layer formed by a vapor phase synthesis method. 4a of the periodic table of elements.

5a and 6a group metals, and 81 and B carbides, nitrides, carbonitrides, and carbonitrides. The structured surface-coated tool member has one or more layers of Gui A'mond grains present in the surface coating layer,
It has extremely excellent wear resistance, so when used as a cutting tool, it can be used for cutting materials such as steel and cast iron, as well as FRP and ceramic calcined bodies. Demonstrates excellent cutting performance in cutting, and also
Because it has such excellent wear resistance, it exhibits excellent performance when used as wear-resistant tools such as metal hot processing and metal forming parts and dies, and as grinding tools such as whetstones and lap plates. We obtained the knowledge that

The present invention has been made based on the above findings, and includes the formation of at least one layer by vapor phase synthesis on the surface of an alloy-based tool member whose main component is at least one of the iron group metals. 4 a+ of the periodic table of elements formed by chemical vapor deposition method, physical vapor deposition method, etc.
' 5 a + and group 6a metals, and 81 and B carbides, nitrides.

The entire surface coating layer has an alternate lamination structure with hard compound layers composed of a single layer or a multilayer of two or more of carbonitrides and carbonitrides, and is particularly suitable for cutting tools, The present invention is characterized by a surface-coated tool member suitable for use as a wear-resistant tool and a grinder JJ.

Note that the diamond layer in the surface coating layer of this invention is made of W, Mo,
Alternatively, it may contain about 1 to 10 atomic percent of Ta or the like as an impurity.

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

Examples Cutting tips having the compositions shown in Table 1 and having the shape of JIS-8NP431 were prepared as base tool members, and these base tool members were processed using a normal vapor phase synthesis apparatus. Reactor: Quartz tube with inner diameter of 75 mm, W filament heating temperature: 2000°C, distance between cutting tip and W filament: 1.5 an, reaction gas flowed into the reactor: volume ratio CH3/H2 = 0.005
A mixed gas, an atmospheric pressure in the reactor maintained during the reaction of 20 torr,
Reaction time: 3 to 10 hours, gas phase synthesis treatment under the conditions of Inside 29 Ki: 2
Ar of X10torr.

Chemical vapor deposition treatment was performed alternately under the following conditions: voltage applied to the target was 400 V, heating temperature of the cutting tip was 500°C, reaction time was 1 to 3 hours, and the average layer thickness shown in Table 1 was obtained. The surface coating layer is composed of alternating layers of at least one diamond layer and at least one layer of a hard compound consisting of a compound shown in Table 1 and a single layer or multiple layers having an average layer thickness. Cutting tips 1 to 13 coated with the present invention were each manufactured by forming the coating on the surface of the cutting tip.

For comparison purposes, the diamond layer was 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 chip having the composition to be treated in the first furnace. By forming a surface coating layer consisting of a hard compound layer and a thin layer or multiple layers having an average layer thickness as shown, the conventional coated cutting tip 1
-5 were produced, respectively.

Next, the coated cutting chips 1 to 1 of the present invention obtained as a result
3 and conventional coated cutting tips 1 to 5, Rigid material: FRP, Cutting speed: 80 m/mn, Feed: 0.2 tnm/rev, Depth of cut: 1 m
, Cutting time: 3 ml, All continuous cutting tests were conducted under the following conditions, 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
13 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 mentioned above, the surface-coated tool member of the present invention has excellent wear resistance due to the presence of at least one diamond layer in the surface coating layer, so it can be used not only with steel and cast iron but also with FRP and ceramics. Calcined body, further M
It is not only suitable for use as a cutting tool for cutting work materials such as 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 -31 pieces

Claims (1)

[Scope of Claims] At least one diamond layer formed by a vapor phase synthesis method on the surface of an alloy-based tool member containing at least one of the iron group metals as a main component, and 4a of the periodic table of elements. ,
Group 5a and 6a metals. and carbides, nitrides, carbonitrides of Sl and B. A surface-coated tool with excellent wear resistance formed by forming a surface coating layer having an alternate lamination structure with a hard compound layer composed of a single layer or a multilayer of two or more of carbonate and nitrides. Element.