JPS6210300B2 - - Google Patents

Description

[Detailed description of the invention]

This invention has excellent wear resistance, cutting,
The present invention relates to a wear-resistant and surface-coated tool member suitable for use in the field of grinding. Conventionally, for example, hard dispersed phases manufactured by powder metallurgy mainly contain elements 4a, 5a, and 5a of the periodic table.
and 6a group metals, and one or more of Si carbides, nitrides, carbonitrides, and carbonitrides, while the binder phase is mainly iron group metals, and Si group 5a and 6a metals. 4a, 5a, and 6 on the surface of a super hard alloy base tool member made of one or more of the metals
A surface coating layer consisting of a hard compound layer composed of a single layer or a multilayer of two or more of group a metals and carbides, nitrides, carbonitrides, and carbonitrides of Si and B. It is well known that surface-coated super hard alloy members formed using chemical vapor deposition or physical vapor deposition are used as cutting tools. 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 ceramic body or the like, the desired cutting life was not achieved due to insufficient wear resistance. Therefore, from the above-mentioned viewpoint, the present inventors conducted research to obtain a tool member suitable for use as a cutting tool particularly for cutting work materials such as FRP and ceramic fired bodies. The base tool member is composed of metals from groups 5a and 6a of the periodic table of elements, Hf, and alloys thereof, and the surface coating layer formed on the surface of this base tool member is formed by a vapor phase synthesis method. 4a, 5a, and 6a formed by chemical vapor deposition, physical vapor deposition, etc.
metals of the group, as well as carbides, nitrides of Si and B,
A surface-coated tool member having an alternately laminated structure with at least one hard compound layer consisting of a single layer or a multilayer of two or more of carbonitrides and carbonitrides has a surface-coated tool member in which the surface-coated tool member has The presence of one or more diamond layers makes it extremely wear resistant, so when used as a cutting tool, it can be used not only on steel and cast iron, but also on FRP and other materials. Ceramic: Demonstrates excellent cutting performance when cutting work materials such as fired bodies, and also has excellent wear resistance, so
They discovered that it also exhibits excellent performance when used as wear-resistant tools such as metal hot processing and metal forming members and dies, and as grinding tools such as whetstones and lap plates. The present invention has been made based on the above knowledge, and is based on the above-mentioned findings. At least one layer of diamond 4a formed by chemical vapor deposition or physical vapor deposition, etc.
At least 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. A surface coating layer having an alternate laminated structure with one layer is formed, and the surface coating tool member is particularly suitable for use as a cutting tool, a wear-resistant tool, and a grinding tool. The diamond layer of the present invention may contain about 1 to 10 atomic % of impurities such as W, Ta, or Mo evaporated from the filament of a vapor phase synthesis apparatus. Next, the surface-coated tool member of the present invention will be specifically explained using examples. Example Cutting chips each having the composition shown in Table 1 and having the shape of JIS/SNP431 were prepared as base tool members, and these base tool members were processed using a normal vapor phase synthesis apparatus. Reaction furnace: 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
Gas phase synthesis treatment under the following conditions: mixed gas of CH ₃ /H ₂ = 0.005, atmosphere pressure maintained in the reactor during the reaction: 20 torr, reaction time: 3 to 8 hours, and ordinary magnetron sputtering equipment. Target material: The same compound as the hard compound layer in Table 1, Reaction furnace atmosphere: 2×10 ^-2 torr Ar, Voltage applied to target: -400V, Cutting chip heating temperature : 500°C, reaction time: 1 to 3 hours, and chemical vapor deposition treatment under the following conditions, respectively, to form at least one diamond layer with the average layer thickness shown in Table 1 and with the average layer thickness shown in Table 1. The coating of the present invention can be obtained by forming a surface coating layer on the surface of the cutting tip, which is composed of alternating layers of the compound shown above and at least one layer of a hard compound consisting of a single layer or multiple layers having an average layer thickness. Cutting chips 1 to 13 were manufactured, respectively. For the purpose of comparison, conventional cutting tips made of cemented carbide having the compositions shown in Table 1 were prepared as base tool members.

[Table] A diamond layer was not formed by vapor phase synthesis on the surface, but only the chemical vapor deposition treatment by magnetron sputtering described above was applied to the surface, and a hard compound layer and a single layer or an average layer thickness of the hard compound layer and average layer thickness shown in Table 1 were respectively applied. Conventionally coated cutting chips 1 to 5 were each manufactured by forming a multilayer surface coating layer. Next, regarding the coated cutting chips 1 to 13 of the present invention and the conventional coated cutting chips 1 to 5 obtained as a result, work material: FRP, cutting speed: 100 m/min, feed: 0.1 mm/rev, depth of cut: 1 mm, A continuous cutting test was conducted under the following conditions: cutting time: 5 min, 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 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 hard 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. It is.

Claims (1)

[Claims] 1 metals of groups 5a and 6a of the periodic table of the elements, and
Hf, and at least one diamond layer formed by vapor phase synthesis on the surface of the base tool member made of these alloys, and 4a of the periodic table of elements,
At least one hard compound 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. A surface-coated tool member with excellent wear resistance, which is formed by forming a surface coating layer having an alternate laminated structure with layers.