EP0247630A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Material for cutting tools, use of same and cutting tools
Assignee: Niterra Co Ltd
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Filing: 1987-05-29
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Granted: —
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Expires: 2007-05-29
Abstract
Abstract Cutting tools and materials for cutting ferrous work-pieces at high cutting speed comprise: a) a substrate based on a matrix composed of at least one selected from the group consisting of oxides, nitrides, carbides and oxinitrides of aluminum, silicon and IVa group transition metal elements in the International Periodic Table, the substrate comprising 5 to 50% by weight of SiC whiskers with respect to said substrate, the whiskers being uniformly dispersed therein; and b) one or more coating layers composed at least one of oxides, nitrides, carbides, borides and oxinitrides of at least one of aluminum, IVa and Va group elements in said Periodic Table, said coating layer being formed on the surface of said substrate to a thickness ranging from about 0.3 to about 20 mu m. r
Inventors
- 👤 Junichiro Suzuki
- 👤 Shoji Sakakibara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:38
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/87; B; B23; B23B; B23B27/00; B23B27/14; B23B27/148; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/119; C04B35/16; C04B35/18; C04B35/185; C04B35/515; C04B35/56; C04B35/5607; C04B35/5611; C04B35/58; C04B35/581; C04B35/622; C04B35/64; C04B35/645; C04B35/71; C04B35/78; C04B35/80; C04B41/45; C04B41/50; C04B41/5025; C04B41/5053; B23B2228/00; B23B2228/61; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/3224; C04B2235/3225; C04B2235/3231; C04B2235/3244; C04B2235/34; C04B2235/3418; C04B2235/38; C04B2235/3804; C04B2235/3813; C04B2235/3817; C04B2235/3826; C04B2235/3839; C04B2235/3843; C04B2235/3847; C04B2235/3852; C04B2235/3865; C04B2235/3886; C04B2235/40; C04B2235/404; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5244; C04B2235/526; C04B2235/5264; C04B2235/5276; C04B2235/5296; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2235/5445; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/96
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
123 words
A material for cutting tools, which comprises in combination: a) a substrate based on a matrix composed of at least one selected from the group consisting of oxides, nitrides, carbides and oxinitrides of aluminum silicon and IVa group transition metal elements in the International Periodic Table, the substrate comprising 5 to 50% by weight of SiC whiskers with respect to said substrate, the whiskers being uniformly dispersed therein; and b) one or more coating layers composed at least one of oxides, nitrides, carbides, borides and oxinitrides of at least one of aluminum, IVa and Va group elements in said Periodic Table, said coating layer being formed on the surface of said substrate to a thickness ranging from about 0.3 to about 20 µm.
Claim 2
Dependent Claim
123 words
A material for cutting tools, which comprises in combination: a) a substrate based on a matrix composed of at least one selected from the group consisting of oxides, nitrides, carbides and oxinitrides of aluminum silicon and IVa group transition metal elements in the International Periodic Table, the substrate comprising 5 to 50% by weight of SiC whiskers with respect to said substrate, the whiskers being uniformly dispersed therein; and b) one or more coating layers composed at least one of oxides, nitrides, carbides, borides and oxinitrides of at least one of aluminum, IVa and Va group elements in said Periodic Table, said coating layer being formed on the surface of said substrate to a thickness ranging from about 0.3 to about 20 µm.
Claim 3
Dependent Claim
33 words
Material for cutting tools as set forth in Claim l, wherein said matrix for the substrate is at least one selected from the group consisting of Al₂O₃, AlN, AlON, 3Al₂O₃-2SiO₂ (mullite) and TiC.
Claim 4
Dependent Claim
36 words
Material for the cutting tools as set forth in Claim l, wherein the quantity of said SiC whiskers is in a range of from 5 to 30% by weight, preferably l5 to 30 % by weight.
Claim 5
Dependent Claim
43 words
Material for cutting tools as set forth in one of the preceding claims, wherein a layer to be in direct contact with said substrate, among said coating layers, is composed of the same metallic component as that of said matrix for the substrate.
Claim 6
Dependent Claim
39 words
Material for cutting tools as set forth in Claim 4, wherein the metallic component of said matrix for the substrate is aluminum, and at least the layer to be in direct contact with said substrate is composed of aluminum.
Claim 7
Dependent Claim
57 words
Material for cutting tools as set forth in Claim 5 , wherein said matrix for the substrate is composed of one selected from the group consisting of Al₂O₃, AlN, AlON and 3Al₂O₃-2SiO₂, and said layer to be in direct contact with said substrate is composed of one selected from the group consisting of Al₂O₃, AlN and AlON.
Claim 8
Dependent Claim
65 words
Material for cutting tools as set forth in Claim 4 , wherein the metallic component of said matrix for the substrate is composed of one of the elements belonging to the IVa group of the Periodic Table, and at least the layer to be in direct contact with said substrate is composed of one of elements belonging to the IVa group of the Periodic Table.
Claim 9
Dependent Claim
45 words
Material for cutting tools as set forth in Claim 7 , wherein said matrix for the substrate is TiC, and said layer to be in direct contact with said substrate is one selected from the group consisting of TiC, TiN, TiCN, TiCO, TiON and TiCON.
Claim 10
Dependent Claim
49 words
Material for cutting tools as set forth in one of the preceding claims, wherein the metallic component of a layer to be in contact with a work-piece, among said coating layers, is one selected from the group consisting of aluminum and the group IVa elements of the Periodic Table.
Claim 11
Dependent Claim
61 words
l0. Material for cutting tools as set forth in one of the preceding claims, wherein no more than 50% by weight of the substrate matrix has been substituted with at least one substituent component seleced from the groups consisting of metals, oxides, nitrides, carbides, and borides of elements Al, Si, and IVa, Va and VIa groups of the International Periodic Table.
Claim 12
Dependent Claim
83 words
A material for cutting tools, which comprises in combination: a) a substrate based on an Al₂O₃ matrix, and comprising 5 to 70% by weight of SiC whiskers, and b) one or more coating layers composed of oxides, nitrides, carbides, carbonitrides, oxicarbides or oxicarbo-nitrides of IVa or Va group elements in the International Periodic Table, or oxide, nitride or oxinitride of aluminum, said coating layer being formed on the surface of said substrate to a thickness ranging from about 0.3 to about 20 µm.
Claim 13
Dependent Claim
83 words
A material for cutting tools, which comprises in combination: a) a substrate based on an Al₂O₃ matrix, and comprising 5 to 70% by weight of SiC whiskers, and b) one or more coating layers composed of oxides, nitrides, carbides, carbonitrides, oxicarbides or oxicarbo-nitrides of IVa or Va group elements in the International Periodic Table, or oxide, nitride or oxinitride of aluminum, said coating layer being formed on the surface of said substrate to a thickness ranging from about 0.3 to about 20 µm.
Claim 14
Dependent Claim
77 words
A material for cutting tools as set forth in claim ll in which the substrate based on an Al₂O₃ matrix comprises 5 to 50% by weight of SiC whiskers; and l to 35% by weight of at least one of substituting component selected from the group consisting of metals of IVa, Va or VIa group elements in the International Periodic Table, oxides, nitrides, carbides or borides of these metallic elements, or solid-solutions of these compounds, and SiC.
Claim 15
Dependent Claim
85 words
A material for cutting tools, which comprises in combination: a) a substrate based on AlN matrix, and comprising 5 to 50% by weight of SiC whiskers;and b) one or more coating layers composed of at least one of oxides, nitrides, carbides, carbonitrides, oxicarbides or oxicarbo-nitrides of IVa or Va group elements of the International Periodic Table, or oxide, nitride and oxinitride of aluminum, said coating layer being formed on the surface of said substrate to a thickness of from about 0.3 to about 20 µm.
Claim 16
Dependent Claim
85 words
A material for cutting tools, which comprises in combination: a) a substrate based on AlN matrix, and comprising 5 to 50% by weight of SiC whiskers;and b) one or more coating layers composed of at least one of oxides, nitrides, carbides, carbonitrides, oxicarbides or oxicarbo-nitrides of IVa or Va group elements of the International Periodic Table, or oxide, nitride and oxinitride of aluminum, said coating layer being formed on the surface of said substrate to a thickness of from about 0.3 to about 20 µm.
Claim 17
Dependent Claim
27 words
Material for cutting tools as set forth in any one of the preceding claims, wherein said coating layer is a single layer of l-l0 µm in thickness.
Claim 18
Dependent Claim
41 words
Material for cutting tools as set forth in any one of Claims l to l3 , wherein said coating layer has a multiply layer structure with an innermost layer being 0.2-5 µm and an outer layer being l-l0 µm in thickness.
Claim 19
Dependent Claim
17 words
Use of a material according to one of the preceding claims for cutting a ferrous work piece.
Claim 20
Dependent Claim
17 words
Cutting tool composed of the material as set forth in any one of claims l to l5.
Claim 21
Independent Claim
19 words
A method for cutting a ferrous work-piece by means of the cutting tool as set forth in Claim l6.
Claim 22
Independent Claim
20 words
A method for cutting as set forth in Claim l8, wherein the cutting operation is done at a high speed.
References Cited (Backward Citations)
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