US4859531A
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Method for bonding a cubic boron nitride sintered compact
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-07-27
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Granted: 1989-08-22
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Expires: 2008-07-27
Abstract
Abstract A method for bonding a cubic boron nitride sintered compact to other cubic boron nitride sintered compact or to a body of shank material is disclosed. The method comprises forming a Ti layer of 0.01-1 μm in thickness over a bonding interface between two cubic boron nitride sintered compacts or between a cubic boron nitride sintered compact and a body of shank material, forming a layer of Ni or Cu over the Ti layer to a thickness of 0.01-5 μn, putting together the two cubic boron nitride sintered compacts or the cubic boron nitride sintered compact and the body of shank material with a 10-1,000 μm foil of Al, Al-Ni alloy or Ag--Cu--In alloy being placed over the boding interface, and heating the cubic boron nitride sintered compact structure to temperatures above the meeting point of the metal foil and not exceeding 750° C. in an inert atmosphere or in a vacuum.
Inventors
- 👤 Kazuwo Tsuji
- 👤 Hitoshi Sumiya
- 👤 Yoshiaki Kumazawa
- 👤 Nobuo Urakawa
- 👤 Keiichi Satoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:51
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3006; C04B37/02; C04B37/023; C04B37/026; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/121; C04B2237/122; C04B2237/124; C04B2237/125; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/361; C04B2237/40; C04B2237/401; C04B2237/403; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/76; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/26; Y10T428/261; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
137 words
A method for bonding a cubic boron nitride sintered compact comprising the steps of: preparing a pair of cubic boron nitride sintered compacts, each having a bonding surface; forming a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; forming a Ni layer of 0.01-5 μm in thickness over said Ti layer; holding said cubic boron nitride sintered compacts together, with a metal foil of 10-1,000 μm in thickness being interposed between said bonding surfaces of said sintered compacts, said metal foil being made of a material selected from the group consisting of aluminum and Al--Ni alloy; and heating said sintered compacts to a temperature above the melting point of said metal foil and not exceeding 750° C. in an inert atmosphere or in a vacuum.
Claim 2
Independent Claim
137 words
A method for bonding a cubic boron nitride sintered compact comprising the steps of: preparing a pair of cubic boron nitride sintered compacts, each having a bonding surface; forming a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; forming a Ni layer of 0.01-5 μm in thickness over said Ti layer; holding said cubic boron nitride sintered compacts together, with a metal foil of 10-1,000 μm in thickness being interposed between said bonding surfaces of said sintered compacts, said metal foil being made of a material selected from the group consisting of aluminum and Al--Ni alloy; and heating said sintered compacts to a temperature above the melting point of said metal foil and not exceeding 750° C. in an inert atmosphere or in a vacuum.
Claim 3
Dependent Claim
32 words
The method for bonding a cubic boron nitride sintered compact according to claim 1, wherein said Al--Ni alloy comprises 90 % by weight or more of Al and the balance is Ni.
Claim 4
Dependent Claim
31 words
The method for bonding a cubic boron nitride sintered compact according to claim 2, wherein said cubic boron nitride sintered compact is heat-resistant up to a temperature of approximately 750° C..
Claim 5
Dependent Claim
28 words
The method for bonding of cubic boron nitride sintered compact according to claim 3, wherein said cubic boron nitride sintered compact is produced by a reactive sintering process.
Claim 6
Dependent Claim
137 words
An article of manufacture, comprising a pair of cubic boron nitride sintered compacts, each compact having a bonding surface; a permanent bond between said bonding surfaces of said compacts, said permanent bond comprising a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; a Ni layer of 0.01-5 μm in thickness of said Ti layer; a metal foil of 10-1,000 μm in thickness interposed between said bonding surfaces of said sintered compacts, said metal foil being made of a material selected from the group consisting of aluminum and Al--Ni alloy; and wherein said metal foil forms said bond between said sintered cubic boron nitride compacts as a result of a heat treatment not exceeding 750° C. that melted said metal foil to form said permanent bond.
Claim 7
Dependent Claim
137 words
An article of manufacture, comprising a pair of cubic boron nitride sintered compacts, each compact having a bonding surface; a permanent bond between said bonding surfaces of said compacts, said permanent bond comprising a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; a Ni layer of 0.01-5 μm in thickness of said Ti layer; a metal foil of 10-1,000 μm in thickness interposed between said bonding surfaces of said sintered compacts, said metal foil being made of a material selected from the group consisting of aluminum and Al--Ni alloy; and wherein said metal foil forms said bond between said sintered cubic boron nitride compacts as a result of a heat treatment not exceeding 750° C. that melted said metal foil to form said permanent bond.
Claim 8
Independent Claim
128 words
A method for bonding a cubic boron nitride sintered compact comprising the steps of: preparing a pair of cubic boron nitride sintered compacts, each having a bonding surface; forming a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; forming a Cu layer of 0.01-5 μm in thickness on said Ti layer; holding together said cubic boron nitride sintered compacts, with a metal foil of Ag--Cu--In alloy having a thickness of 10-1,000 μm interposed between said bonding surfaces of said cubic boron nitride sintered compacts; and heating said cubic boron nitride sintered compacts to a temperature above the melting point of said Ag--Cu--In alloy and not exceeding 750° C. in an inert atmosphere or in a vacuum.
Claim 9
Independent Claim
128 words
A method for bonding a cubic boron nitride sintered compact comprising the steps of: preparing a pair of cubic boron nitride sintered compacts, each having a bonding surface; forming a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; forming a Cu layer of 0.01-5 μm in thickness on said Ti layer; holding together said cubic boron nitride sintered compacts, with a metal foil of Ag--Cu--In alloy having a thickness of 10-1,000 μm interposed between said bonding surfaces of said cubic boron nitride sintered compacts; and heating said cubic boron nitride sintered compacts to a temperature above the melting point of said Ag--Cu--In alloy and not exceeding 750° C. in an inert atmosphere or in a vacuum.
Claim 10
Dependent Claim
40 words
The method for bonding a cubic boron nitride sintered compact according to claim 6, wherein said Ag--Cu--In alloy is a ternary alloy comprising 15-25 % by weight of In, 25-35 % by weight is Cu and the balance of Ag.
Claim 11
Dependent Claim
32 words
The method for bonding a cubic boron nitride sintered compact according to claim 7, wherein said cubic boron nitride sintered compact is heat resistant up to a temperature of approximately 750° C..
Claim 12
Dependent Claim
28 words
The method for bonding a cubic boron nitride sintered compact according to claim 8, wherein said cubic boron nitride sintered compacts are produced by a reactive sintering process.
Claim 13
Dependent Claim
132 words
An article of manufacture, comprising a pair of cubic boron nitride sintered compacts, each compact having a bonding surface; a permanent bond between said bonding surfaces of said compacts, said permanent bond comprising a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; a Cu layer of 0.01-5 μm in thickness on said Ti layer; a metal foil of an Ag--Cu--In alloy having a thickness of 10-1,000 μm interposed between said bonding surfaces of said cubic boron nitride sintered compacts; and wherein said metal foil of said Ag--Cu--In alloy forms said permanent bond between said sintered cubic boron nitride compacts as a result of a heat treatment not exceeding 750° C. that melted said metal foil to form said permanent bond.
Claim 14
Dependent Claim
132 words
An article of manufacture, comprising a pair of cubic boron nitride sintered compacts, each compact having a bonding surface; a permanent bond between said bonding surfaces of said compacts, said permanent bond comprising a Ti layer of 0.01-1 μm in thickness on said bonding surface of each of said cubic boron nitride sintered compacts; a Cu layer of 0.01-5 μm in thickness on said Ti layer; a metal foil of an Ag--Cu--In alloy having a thickness of 10-1,000 μm interposed between said bonding surfaces of said cubic boron nitride sintered compacts; and wherein said metal foil of said Ag--Cu--In alloy forms said permanent bond between said sintered cubic boron nitride compacts as a result of a heat treatment not exceeding 750° C. that melted said metal foil to form said permanent bond.
Claim 15
Independent Claim
172 words
A method for bonding a cubic boron nitride sintered compacts comprising the steps of: preparing a cubic boron nitride sintered compact having a bonding surface, and preparing a body of shank material; forming a Ti layer of 0.01-1 μm in thickness on said bonding surface of said cubic boron nitride sintered compact; forming a Ni layer of 0.01-5 μm in thickness on said Ti layer; holding together said cubic boron nitride sintered compact and said body of shank material, with a metal foil of Al--Ni alloy having a thickness of 10-1,000 μm being interposed between said cubic boron nitride sintered compact and said body of shank material, said metal foil being made of Al or Al--Ni alloy comprising 90 % by weight or more of Al and the balance is Ni; and heating said cubic boron nitride sintered compact and said body of shank material to a temperature above the melting point of said Al or said Al--Ni alloy and not exceeding 750° C. in an inert atmosphere or in a vacuum.
Claim 16
Independent Claim
172 words
A method for bonding a cubic boron nitride sintered compacts comprising the steps of: preparing a cubic boron nitride sintered compact having a bonding surface, and preparing a body of shank material; forming a Ti layer of 0.01-1 μm in thickness on said bonding surface of said cubic boron nitride sintered compact; forming a Ni layer of 0.01-5 μm in thickness on said Ti layer; holding together said cubic boron nitride sintered compact and said body of shank material, with a metal foil of Al--Ni alloy having a thickness of 10-1,000 μm being interposed between said cubic boron nitride sintered compact and said body of shank material, said metal foil being made of Al or Al--Ni alloy comprising 90 % by weight or more of Al and the balance is Ni; and heating said cubic boron nitride sintered compact and said body of shank material to a temperature above the melting point of said Al or said Al--Ni alloy and not exceeding 750° C. in an inert atmosphere or in a vacuum.
Claim 17
Dependent Claim
33 words
The method for bonding a cubic boron nitride sintered compact according to claim 11, wherein said shank material is a metal selected from a group of W alloy, Mo, W and cemented carbide.
Claim 18
Dependent Claim
31 words
The method for bonding a cubic boron nitride sintered compact according to claim 12, wherein said cubic boron nitride sintered compact is heat-resistant up to a temperature of approximately 750° C..
Claim 19
Dependent Claim
28 words
The method for bonding a cubic boron nitride sintered compact according to claim 13, wherein said cubic boron nitride sintered compact is produced by a reactive sintering process.
Claim 20
Dependent Claim
174 words
An aritcle of manufacture, comprising a cubic boron nitride sintered compact and a shank body of a shank material, said cubic boron nitride sintered compact having a bonding surface, said shank body having a bonding surface, a permanent bond between said sintered compact and said shank body, said permanent bond comprising a Ti layer of 0.01-1 μm in thickness on said bonding surface of said cubic boron nitride sintered compact; a Ni layer of 0.01-5 μm in thickness on said Ti layer; a metal foil of Al--Ni alloy having a thickness of 10-1,000 μm interposed between said cubic boron nitride sintered compact and said shank body, said metal foil being made of Al or Al--Ni alloy comprising 90% by weight or more of Al and the balance of Ni; and wherein said metal foil of Al or Al--Ni forms said permanent bond beteween said cubic boron nitride sintered compact and said shank body as a result of a heat treatment not exceeding 750° C. that melted said metal foil to form said permanent bond.
Claim 21
Dependent Claim
174 words
An aritcle of manufacture, comprising a cubic boron nitride sintered compact and a shank body of a shank material, said cubic boron nitride sintered compact having a bonding surface, said shank body having a bonding surface, a permanent bond between said sintered compact and said shank body, said permanent bond comprising a Ti layer of 0.01-1 μm in thickness on said bonding surface of said cubic boron nitride sintered compact; a Ni layer of 0.01-5 μm in thickness on said Ti layer; a metal foil of Al--Ni alloy having a thickness of 10-1,000 μm interposed between said cubic boron nitride sintered compact and said shank body, said metal foil being made of Al or Al--Ni alloy comprising 90% by weight or more of Al and the balance of Ni; and wherein said metal foil of Al or Al--Ni forms said permanent bond beteween said cubic boron nitride sintered compact and said shank body as a result of a heat treatment not exceeding 750° C. that melted said metal foil to form said permanent bond.
References Cited (Backward Citations)
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