EP0079243A1
Expired / Lapsed
EP
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A composite compact component comprising a diamond or boron nitride compact
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1982-11-09
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Granted: —
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Expires: 2002-11-09
Abstract
Abstract A composite compact component with a high bond strength between the composite compact and a substrate, comprising a composite compact consisting of a diamond or BN compact (1) containing at least 50% by volume of diamond or BN powser and a base (2) of hard sintered alloy, e.g. WC or (Mo, W) C bonded by an iron group metal, bonded during sintering directly or through an interlayer (3) with a thickness of at most 0.5 mm to the diamond or BN compact, and a substrate (5 or 6) bonded to the base (2) of the composite compact (1), the substrate (5 or 6) having a larger volume than the base (2), in which the substrate (5 or 6) is a hard sintered alloy or steel which may be the same as that of the base (2). The base (2) and substrate (5 or 6) are bonded through a high strength metal or alloy (4), as a filler metal, having a thickness of at most 2 mm and a melting point of at least the liquidus point of the hard sintered alloy. The filler metal (4) may be a Fe-Ni, Fe-Ni-Cr or Fe-Co-Cr alloy. The component may be made sandwiching the filler metal (4) between the base (2) of the compact (1) and the substrate (5 or 6) then heating and melting the filler metal (4) by an electron or laser beam (7).
Inventors
- 👤 Akio Itami Works Of Sumitomo Electric Hara
- 👤 Masaya Itami Works Of Sumitomo Electric Miyaka
- 👤 Shuji Itami Works Of Sumitomo Electric Yasu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; B23; B23B; B23B27/00; B23B27/14; B23B27/18; B23B27/20; B23K; B23K31/00; B23K31/02; B23K31/025; B23K35/00; B23K35/22; B23K35/24; B23K35/30; E; E21; E21B; E21B10/00; E21B10/46; E21B10/54; E21B10/56; E21B10/567; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10S428/9335; Y10S428/934; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12146; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12625; Y10T428/12639; Y10T428/12646; Y10T428/12653; Y10T428/12771; Y10T428/12861; Y10T428/12931; Y10T428/12951; Y10T428/12958; Y10T428/12965
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
123 words
I. A composite compact component comprising a composite compact consisting of a diamond or BN compact containing at least 50% by volume of diamond or BN powder and a base of hard sintered alloy bonded during sintering directly or through an interlayer with a thickness of at most 0.5 mm to the diamond or BN compact, and a hard sintered alloy or steel substrate bonded to the base of the composite compact, the substrate having a larger volume than the base, and the base and substrate being bonded together through a joint layer of a high strength metal or alloy having a thickness of at most 2 mm and a melting point of at least the liquidus point of the hard sintered alloy.
Claim 2
Dependent Claim
36 words
A composite compact component as claimed in Claim 1, wherein the hard materials present in the hard sintered alloy of the base and substrate are diffused, dispersed and/or precipitated in the high strength metal or alloy.
Claim 3
Dependent Claim
33 words
A composite compact component as claimed in Claim 2 wherein the amount of the hard materials dispersed and/or precipitated in the high strength metal or alloy is.of from 0.1 to 60% by volume.
Claim 4
Dependent Claim
30 words
A composite compact component as claimed in any one of the preceding claims, wherein one of the base and substrate has a projection and the other has a complementary slot.
Claim 5
Dependent Claim
59 words
A composite compact component as claimed in any one of the preceding claims, wherein the base and substrate are of a hard sintered alloy consisting of at least one carbide, carbonitride, nitride or carboxynitride of a Group 4a, 5a or 6a element of the Periodic Table or a solid solution thereof, bonded by at least one iron group metal.
Claim 6
Dependent Claim
75 words
A composite compact component as claimed in Claim 5, wherein the base and substrate are of a hard sintered alloy consisting of WC or (Mo, W)C and Co or Ni, as a binder metal, and are bonded through an Ni or Ni alloy layer having a thickness of at most 1 mm, in which WC or (Mo, W)C diffused from the hard sintered alloys of the base and substrate is dissolved and precipitated during bonding.
Claim 7
Dependent Claim
34 words
A composite compact component as claimed in any one of the preceding claims, wherein the joint layer is an iron group metal or an alloy containing an iron group metal as a predominant component.
Claim 8
Dependent Claim
31 words
A composite compact component as claimed in Claim 7, wherein the joint layer is of an Fe-Ni alloy having a thermal expansion coefficient of up to 12 x 10 -6 /°C.
Claim 9
Dependent Claim
38 words
A composite compact component as claimed in Claim 7 wherein the joint layer is of a hard sintered alloy having a larger content of an iron group metal than the hard sintered alloys of the base and substrate.
Claim 10
Dependent Claim
60 words
A composite compact component as claimed in Claim 9, wherein the base, substrate and joint layer are of hard sintered alloys containing WC or (Mo, W)C optionally with at least one carbide of Ti, Zr, Hf, Cr, V, Nb or Ta, as a hard phase, and 3 to 80% by weight of an iron group metal, as a binder metal.
Claim 11
Dependent Claim
68 words
A composite compact component as claimed in Claim 9 or 10, wherein the hard sintered alloys of the base and substrate contain an iron group metal in a proportion of 3 to 20% by weight and the hard sintered - alloy of the joint layer contains 20 to 80% by weight of Ni, O to 60% by weight of Co and O to 60% by weight of Fe.
Claim 12
Dependent Claim
27 words
A composite compact component as claimed in Claim 1, wherein the substrate is of steel and the base and the substrate are directly bonded without the interlayer.
Claim 13
Dependent Claim
18 words
A composite compact component as claimed in Claim 1 or 12, wherein the substrate is of hardened steel.
Claim 14
Dependent Claim
24 words
A composite compact component as claimed in any one of the preceding claims, wherein the joint layer is fused by a high energy beam.
Claim 15
Dependent Claim
110 words
A drill bit in which a composite compact comprising a diamond or BN compact containing at least 50% by volume of diamond or BN powder and a base of hard sintered alloy bonded during sintering directly or through an interlayer with a thickness of at most O.5 mm to the diamond or BN compact is bonded to a part of cutter of cemented carbide blade through a layer of a high strength metal or alloy, having a thickness of at most 1 mm and a melting point of at least the liquidus point of the hard sintered alloy, by the use of a high energy electron beam or laser beam.
Claim 16
Dependent Claim
32 words
A drill bit as claimed in Claim 15, wherein the high strength. metal or alloy is an iron group metal or an alloy containing an iron group metal as a predominant component.
Claim 17
Dependent Claim
59 words
A composite micro tool in which a composite compact comprising a diamond compact containing at least 70% by volume of diamond or a high pressure form boron nitride compact containing at least 55% by volume of high pressure form boron nitride and a base is bonded to a tool body directly or through a filler by electron beam welding.
Claim 18
Dependent Claim
43 words
A composite micro diameter drill in which a composite compact comprising a diamond compact containing at least 70% by volume of diamond and a base, as a cutter, is bonded to a tool body directly or through a filler by electron beam welding.
Claim 19
Dependent Claim
21 words
A composite micro diameter drill as claimed in Claim 18, wherein the diameter of the drill is up to 3 mm.
Claim 20
Dependent Claim
147 words
A process for the production of a composite compact component, which comprises sandwiching a sheet of up to 2 mm thickness of high strength metal or alloy, as a filler metal, between the end of a base of a composite compact and the end of a substrate of a hard sintered alloy or steel having a larger volume than the base, the composite compact consisting of a diamond or BN compact containing at least 50% by volume of diamond or BN powder and the base of a hard sintered alloy bonded during sintering directly or through an interlayer with a thickness of at most 0.5 mm to the diamond or BN compact, then heating and melting the sheet at a temperature of at least the liquidus point of the hard sintered alloy by a high energy beam and thereby welding or bonding the base and substrate .
Claim 21
Dependent Claim
29 words
A process as claimed in Claim 20, wherein hard materials in the hard sintered alloys of the base and substrate are diffused, dispersed and/or precipitated in the melted sheet.
Claim 22
Dependent Claim
172 words
A process for the production of a composite compact component, which comprises working the form of a projection or slot on or in the end of a base of a composite compact consisting of a diamond or BN compact containing at least 50% by volume of diamond or BN powder and the base of a hard sintered alloy bonded during sintering directly or through an interlayer with a thickness of at most 0.5 mm to the diamond or BN compact, working the form of a sheet or projection in or on the end of a substrate consisting of a hard sintered alloy or steel and having a larger volume than the base, sandwiching a ring-shaped thin sheet of a high strength metal or alloy having a thickness of at most 2 mm between the base and substrate, then heating and melting the thin sheet at a temperature of at least the liquidus point of the hard sintered alloy by a high energy beam and thereby welding or bonding the base and substrate.
Claim 23
Dependent Claim
154 words
A process for the production of a composite compact component, which comprises sandwiching a powder, green compact or sintered body of a hard sintered alloy, as a filler, between the end of a base of a composite compact and the end of a substrate of a hard sintered alloy having a larger volume than the base, the composite compact consisting of a diamond or BN compact containing at least 50% by volume of diamond or BN powder and the base of a hard sintered alloy bonded during sintering directly or through an interlayer with a thickness of at most 0.5 mm to the diamond or BN compact and the hard sintered alloy of the filler having a larger content of an iron group metal than the hard sintered alloys of the base and substrate, then heating and melting the filler by a high energy beam and thereby welding or bonding the base and substrate.
Claim 24
Dependent Claim
57 words
A process as claimed in Claim 23, wherein the base, substrate and filler are of hard sintered alloys containing WC or (Mo, W)C optionally with at least one carbide of Ti, Zr, Hf, Cr, V, Nb, and Ta, as a hard phase, and 3 to 80% by weight of an iron group metal, as a binder metal.
Claim 25
Dependent Claim
62 words
A process.as claimed in Claim 23 or Claim 24, wherein the hard sintered alloys of the base and substrate contain an iron group metal in a proportion of 3 to 20% by weight and the hard sintered alloy of the filler contains 20 to 80% by weight of Ni, O to 60% of Co and O to 60% by weight of Fe.
Claim 26
Dependent Claim
121 words
A process for the production of a composite compact component, which comprises tightly contacting the end of a base of a composite compact consisting of a diamond or BN compact containing at least 50% by volume of diamond or BN powder and the base of a hard sintered alloy bonded during sintering directly or through an interlayer with a thickness of at most 0.5 mm to the diamond or BN compact with a substrate of steel haying a larger yolume than the base, applying a high energy beam in such a manner that both the contacted surface of the base and substrate be irradiated, thereby melting the contacted surface of the steel substrate and welding and bonding the base and substrate.
Claim 27
Dependent Claim
34 words
A composite compact as claimed in Claim 14 or a process as claimed in any one of Claims 20 to 26 wherein the high energy beam is an electron beam or a laser beam.
References Cited (Backward Citations)
DE947659C
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FR1255677A
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FR2278436A1
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US4168923A
Cited
EP0003116A1
Cited
US4306139A
Cited
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