EP0709353A2
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EP
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Hard composite material for tools
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1995-10-26
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Granted: —
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Expires: 2015-10-26
Abstract
Abstract Hard composite material for tools, comprising a substrate of CBN sintered body containing more than 20 % by volume of cubic boron nitride or diamond sintered body containing more than 40 % by volume of diamond. The substrate has at least one layer of hard heat-resisting film consisting mainly of Ti, Al and at least one element selected from a group comprising C, N and O on a portion or portions of said substrate where cutting participate. Improved in strength of base material, wear-resistance and oxidation-resistance, less reactive with iron and showing longer tool life comparing to known cutting tools and usable in wider applications such as hardened steel, cast ion and simultaneous cutting of cast ion and aluminum alloy.
Inventors
- 👤 Satoru c/o Itami Works of Sumitomo Elec Kukino
- 👤 Mitsuhiro c/o Itami Works of Sumitomo Elec Goto
- 👤 Tetsuo c/o Itami Works of Sumitomo Elec Nakai
- 👤 Makoto c/o Itami Works of Sumitomo Elec Setoyama
- 👤 Takashi c/o Itami Works of Sumitomo Elec Yosioka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 05:24
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/5062; C04B41/5068; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B41/89; C22; C22C; C22C26/00; C23; C23C; C23C30/00; C23C30/005; C22C2026/005; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/30
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
81 words
Hard composite material for tools, comprising a substrate of CBN sintered body containing more than 20 % by volume of cubic boron nitride (CBN) or diamond sintered body containing more than 40 % by volume of diamond, characterized in that said substrate has at least one layer of hard heat-resisting film consisting mainly of Ti, Al and at least one element selected from a group comprising C, N and O on a portion or portions of said substrate where cutting participate.
Claim 2
Dependent Claim
20 words
The composite material set forth in claim 1 wherein said hard heat-resisting film has a crystal structure of cubic system.
Claim 3
Dependent Claim
39 words
The composite material set forth in claim 1 or 2 wherein said said hard heat-resisting film is made of a compound represented by the general formula: (Ti x Al 1-x ) N in which 0.3 ≤ x ≤ 0.5.
Claim 4
Dependent Claim
26 words
The composite material set forth in any one of claims 1 to 3 wherein said hard heat-resisting film has a thickness of 0.5 to 15 µm.
Claim 5
Dependent Claim
62 words
The composite material set forth in any one of claims 1 to 4 wherein an intermediate layer having a thickness of 0.05 to 5 µm and being made of at least one compound of at least one element selected from a group comprising IVa, Va and VIa elements and at least one element selected from a group comprising C, N and O.
Claim 6
Dependent Claim
73 words
The composite material set forth in any one of claims 1 to 5 wherein a surface layer having a thickness of 0.05 to 5 µm and being made of at least one compound of at least one element selected from a group comprising IVa, Va and Via elements and at least one element selected from a group comprising C, N and O is deposited on an outer surface of said hard heat-resisting film.
Claim 7
Dependent Claim
76 words
The composite material set forth in any one of claims 1 to 6 wherein said substrate is a sintered article obtained by high-pressure sintering of 30 to 90 %. by volume of cubic boron nitride (CBN) powder and a binder powder of balance comprising at least one member selected from a group comprising nitride, carbide, boride and oxide of IVa, Va and VIa elements and their solid solutions and aluminium and/or aluminium compound, and inevitable impurities.
Claim 8
Dependent Claim
62 words
The composite material set forth in claim 7 wherein said binder consist of 50 to 95 % by weight of at least one member selected from a group comprising TiC, TiN, (TiM)C, and (TiM)CN, in which M is a transition metal selected from IVa, Va nd VIa elements except Ti, and 5 to 50 % by weight of aluminum and/or aluminium compound.
Claim 9
Dependent Claim
58 words
The composite material set forth in claim 8 wherein said binder consist of 50 to 80 % by weight of TiN z, in which 0.5 ≤ z ≤ 0.85, 15 to 50 % by weight of aluminum and/or aluminium compound and inevitable impurities, and the transverse rupture strength determined according to JIS standard of higher than 110 kgf/mm.
Claim 10
Dependent Claim
59 words
The composite material set forth in claim 8 wherein said binder consist of 50 to 80 % by weight of TiC z , in which 0.5 ≤ z ≤ 0.85, 15 to 50 % by weight of aluminum and/or aluminium compound and inevitable impurities, and the transverse rupture strength determined according to JIS standard of higher than 105 kgf/mm.
Claim 11
Dependent Claim
69 words
The composite material set forth in any one of claims 1 to 6 wherein said substrate is a sintered article obtained by high-pressure sintering of 45 to 95 % by volume of cubic boron nitride (CBN) powder and a binder powder of balance comprising at least one member selected from a group comprising Co, Ni, WC, TiN, TiC and their solid solutions, aluminum and/or aluminum compound and inevitable impurities.
Claim 12
Dependent Claim
41 words
The composite material set forth in claim 11 wherein said binder contains 1 to 50 % by weight of TiN and at least one member selected from a group comprising Co, Ni and WC, aluminum and/or aluminum compound and inevitable impurities.
Claim 13
Dependent Claim
36 words
The composite material set forth in claim 11 or 12 wherein the powder has particle size of less than 3 mm and the transverse rupture strength determined according to JIS standard of higher than 105 kgf/mm.
Claim 14
Dependent Claim
56 words
The composite material set forth in any one of claims 1 to 6 wherein said substrate is a sintered article obtained by high-pressure sintering of more than 95 % by volume of cubic boron nitride (CBN) powder and a binder powder of balance comprising a boride of of Ia or IIa elements, TiN and inevitable impurities.
Claim 15
Dependent Claim
27 words
The composite material set forth in claim 14 wherein said binder contains 1 to 50 % by weight of TiN and boride of Ia or Ila elements.
Claim 16
Dependent Claim
48 words
The composite material set forth in any one of claims 1 to 6 wherein said substrate is a sintered article obtained by high-pressure sintering of 50 to 98 % by volume of diamond powder and a binder powder of balance comprising iron group metal, WC and inevitable impurities.
Claim 17
Dependent Claim
66 words
The composite material set forth in any one of claims 1 to 6 wherein said substrate is a sintered article obtained by high-pressure sintering of 60 to 95 % by volume of diamond powder and a binder powder of balance comprising iron group metal, at least one member selected from a group comprising carbide and carbonitride of IVa, Va nd VIa element, WC and inevitable impurities.
Claim 18
Dependent Claim
18 words
The composite material set forth in claim 14 wherein said binder comprises Co, TiC, WC and inevitable impurities.
Claim 19
Dependent Claim
48 words
The composite material set forth in any one of claims 1 to 6 wherein said substrate is a sintered article obtained by high-pressure sintering of 60 to 98 % by volume of diamond powder and a binder powder of balance comprising silicon carbide, silicon, WC and inevitable impurities.
Claim 20
Dependent Claim
28 words
The composite material set forth in any one of claim 16 to 19 wherein the transverse rupture strength determined according to JIS standard is higher than 150 kgf/mm.
References Cited (Backward Citations)
JPS5243846B1
Cited
JPS5377811A
Cited
JPS5957967A
Cited
JPS61183187A
Cited
JPH0196083A
Cited
JPH0196084A
Cited
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