JPS635470B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] This invention has excellent wear resistance and is suitable for cutting,
The present invention relates to a wear-resistant and surface-coated tool member suitable for use in the field of grinding. [Prior Art] Conventionally, for example, hard dispersed phases produced by powder metallurgy mainly contain elements 4a, 5a, and 5a of the periodic table.
and group 6a metals, as well as carbides and nitrides of Si,
Composed of one or more of carbonitrides and carbonitrides, while the binder phase is mainly composed of iron group metals and one or more of iron group metals and metals of groups 5a and 6a. A single layer or a single layer of metals of groups 4a, 5a, and 6a, and one of carbides, nitrides, carbonitrides, and carbonitrides of Si and B is applied to the surface of the cemented carbide-based tool member. A surface-coated superhard alloy member formed by forming a surface coating layer consisting of a hard compound layer composed of two or more types of multilayers using a chemical vapor deposition method or a physical vapor deposition method is used as a cutting tool. It is a well-known place. [Problems to be Solved by the Invention] However, although such conventional surface-coated cemented carbide members exhibit relatively excellent cutting performance when cutting steel or cast iron, when the workpiece material is hard glass, for example, Plastic with built-in fibers (FRP)
In the case of a ceramic body or the like, the desired cutting life was not achieved due to insufficient wear resistance. [Means for Solving the Problems] Therefore, from the above-mentioned viewpoint, the present inventors have developed a tool member suitable for use as a cutting tool particularly for cutting work materials such as FRP and ceramic fired bodies. As a result of conducting research to obtain a base tool member, it was found that the hard dispersed phase is mainly made of metals from groups 4a, 5a, and 6a of the periodic table of elements, and
Composed of one or more of Si carbides, nitrides, carbonitrides, and carbonitrides, while the binder phase is mainly composed of iron group metals and metals from groups 5a and 6a of the periodic table of elements. One or two of the following
The surface coating layer formed on the surface of this base tool member is made of metals of Groups 4a, 5a, and 6a formed by chemical vapor deposition, physical vapor deposition, etc. and
A hard compound layer consisting of a single layer or a multilayer of two or more of Si and B carbides, nitrides, carbonitrides, and carbonitrides is the innermost layer, and at least two layers of this hard compound layer and at least one diamond layer formed by a vapor phase synthesis method. It has wear resistance, so when used as a cutting tool, it has excellent cutting performance when cutting work materials such as steel and cast iron, as well as FRP and ceramic fired bodies. In addition,
Because of its excellent wear resistance, it also 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 This invention was made based on the above knowledge, and the hard dispersed phase mainly consists of metals of groups 4a, 5a, and 6a of the periodic table of elements, as well as carbides, nitrides, carbonitrides, and silicon carbides of Si. It is composed of one or more types of carbonitrides, while the binder phase is mainly composed of iron group metals and metals of the periodic table of elements.
Group 4a, 5a, and 6a metals formed by chemical vapor deposition, physical vapor deposition, etc. on the surface of a superhard alloy base tool member composed of one or more metals of group 5a and 6a. The innermost layer is a hard compound layer composed of a single layer or a multilayer of two or more of the following metals and carbides, nitrides, carbonitrides, and carbonitrides of Si and B. A surface coating layer having an alternate laminated structure consisting of at least two compound layers and at least one diamond layer formed by a vapor phase synthesis method is formed, and is particularly useful as a cutting tool, a wear-resistant tool, and a grinding tool. It features a surface-coated tool member suitable for use. The diamond layer of the present invention may contain about 1 to 10 atomic percent of impurities such as W, Ta, or Mo evaporated from the filament of a vapor phase synthesis apparatus. [Example] Next, the surface-coated tool member of the present invention will be specifically explained with reference to Examples. Cemented carbide cutting chips having the composition shown in Table 1 and the shape of JIS/SNP431 were prepared as the base tool members, and these base tool members were subjected to a normal vapor phase synthesis apparatus. Reactor: Quartz tube with inner diameter of 75mmφ, W filament heating temperature: 2000℃, Distance between cutting tip and W filament: 1~2
cm, reaction gas flowed into the reactor: in volume fraction
Mixed gas of CH ₃ /H ₂ = 0.005, atmospheric pressure inside the reactor maintained during the reaction:
20 torr, reaction time: 3 to 10 hours, and a normal magnetron sputtering device.Target material: The same compound as the compound constituting the hard compound layer in Table 1. Atmosphere inside the reactor: Ar at 2×10 ^-2 torr, voltage applied to the target: -400V, heating temperature of the cutting chip: 500℃, reaction time: 1 to 3 hours, alternating with chemical vapor deposition under the following conditions. consisting of a hard compound as the innermost layer, at least one diamond layer each having an average layer thickness shown in Table 1, and a single layer or multiple layers of compounds and average layer thicknesses each also shown in Table 1. Coated cutting tips 1 to 13 of the present invention were each manufactured by forming a surface coating layer constituted by alternate lamination of at least two layers of a hard compound on the surface of the cutting tip.

【table】

〔Effect of the invention〕

From the results shown in Table 1, the coated cutting chips 1 to 13 of the present invention have extremely excellent wear resistance, and therefore have superior cutting performance over a long period of time when cutting FRP compared to conventional coated cutting chips. It is clear that it will be effective over a long period of time. As mentioned above, the surface-coated tool member of the present invention has excellent wear resistance due to the presence of the diamond layer in the surface coating layer, so it can be used not only for steel and cast iron, but also for FRP and ceramic fired bodies. ,
Furthermore, it is not only suitable for use as a cutting tool for cutting work materials such as Al and Al alloys, but also exhibits excellent performance over a long period of time when used as a wear-resistant tool or grinding tool. .

Claims (1)

[Claims] 1 The hard dispersed phase is mainly 4a and 4a of the periodic table of elements.
5a and 6a group metals, and one or more of Si carbides, nitrides, carbonitrides, and carbonitrides, while the binder phase is mainly composed of iron group metals and elemental periodic metals. Table 5a and
Metals from groups 4a, 5a, and 6a of the periodic table of elements, and Si
and a hard compound layer composed of a single layer or a multilayer of two or more of carbides, nitrides, carbonitrides, and carbonate nitrides as the innermost layer, and at least two of these hard compound layers A surface-coated tool member having excellent wear resistance, the surface-coated tool member having a surface-coated layer having an alternating laminated structure consisting of diamond layers and at least one diamond layer formed by a vapor phase synthesis method.