US6030429A
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Hard sintered alloy
Assignee: Toyo Kohan Co Ltd
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Filing: 1997-05-05
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Granted: 2000-02-29
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Expires: 2017-05-05
Abstract
Abstract PCT No. PCT/JP97/02722 Sec. 371 Date Feb. 8, 1999 Sec. 102(e) Date Feb. 8, 1999 PCT Filed May 5, 1997 PCT Pub. No. WO98/05802 PCT Pub. Date Aug. 5, 1997A hard sintered alloy having not only a wear resistance, a high corrosion resistance and a heat resistance but also a sufficiently high strength and a high tenacity in a wide temperature region from normal temperature to a high temperature is provided. In a sintered alloy comprising a hard phase containing mainly 35-95% of Mo2 NiB2 type complex boride, and a binding phase of hard phase binding Ni group constituting the rest, 0.1-8% of Mn with respect to the whole composition is. added, whereby a hard sintered alloy having a high strength, a high tenacity and a high corrosion resistance is obtained. Furthermore, the addition of W serves to further improve the wear resistance and mechanical characteristics, the addition of Cr and/or V the corrosion resistance and mechanical characteristics, the addition of Cu the corrosion resistance, the addition of Co the oxidation resistance and high temperature characteristics, and the addition of Nb, Zr, Ti, Ta and Hf the mechanical characteristics and corrosion resistance.
Inventors
- 👤 Yuji Yamazaki
- 👤 Ken-ichi Takagi
- 👤 Kazunori Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:21
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/14; C22C32/00; C22C32/0047; C22C32/0073
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
66 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance, wherein the sintered alloy comprises a hard phase consisting mainly 35-95% by weight (hereafter, % means percent by weight) of the Mo 2 NiB 2 complex boride and a binding phase of Ni-base matrix as the rest that binds said hard phase, and contains 0.1-8% of Mn with respect to the whole composition.
Claim 2
Dependent Claim
66 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance, wherein the sintered alloy comprises a hard phase consisting mainly 35-95% by weight (hereafter, % means percent by weight) of the Mo 2 NiB 2 complex boride and a binding phase of Ni-base matrix as the rest that binds said hard phase, and contains 0.1-8% of Mn with respect to the whole composition.
Claim 3
Dependent Claim
45 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein said sintered hard alloy is characterized by comprising 3-7.5% of B, 21.3-68.3% of Mo, 0.1-8% of Mn., and 10% or more of Ni as the rest.
Claim 4
Dependent Claim
38 words
A sintered hard alloy with high strength, high toughness and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.1-30% of W.
Claim 5
Dependent Claim
38 words
A sintered hard alloy with high strength, high toughness and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.2-10% of Nb.
Claim 6
Dependent Claim
40 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.3-40% of W and Nb.
Claim 7
Dependent Claim
38 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Ni comprised in said sintered hard alloy is characteristically substituted by 0.1-5% of Cu.
Claim 8
Dependent Claim
38 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Ni comprised in said sintered hard alloy is characteristically substituted by 0.2-10% of Co.
Claim 9
Dependent Claim
40 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Ni comprised in said sintered hard alloy is characteristically substituted by 0.3-15% of Cu and Co.
Claim 10
Dependent Claim
51 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.1-30% of W and a part of content of Ni characteristically substituted by 0.1-5% of Cu.
Claim 11
Dependent Claim
51 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.1-30% of W and a part of content of Ni characteristically substituted by 0.2-10% of Co.
Claim 12
Dependent Claim
53 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.1-30% of W and a part of content of Ni characteristically substituted by 0.3-15% of Cu and Co.
Claim 13
Dependent Claim
51 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.2-10% of Nb and a part of content of Ni characteristically substituted by 0.1-5% of Cu.
Claim 14
Dependent Claim
51 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.2-10% of Nb and a part of content of Ni characteristically substituted by 0.2-10% of Co.
Claim 15
Dependent Claim
53 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.2-10% of Nb and a part of content of Ni characteristically substituted by 0.3-15% of Cu and Co.
Claim 16
Dependent Claim
53 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.3-40% of W and Nb and a part of content of Ni characteristically substituted by 0.1-5% of Cu.
Claim 17
Dependent Claim
53 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.3-40% of W and Nb and a part of content of Ni characteristically substituted by 0.2-10% of Co.
Claim 18
Dependent Claim
55 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a part of content of Mo comprised in said sintered hard alloy is characteristically substituted by 0.3-40% of W and Nb and a part of content of Ni characteristically substituted by 0.3-15% of Cu and Co.
Claim 19
Dependent Claim
50 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in any of claim 4, wherein a part or whole of Nb comprised in said sintered hard alloy is characteristically substituted by one or two or more types selected in Zr, Ti, Ta, and Hf.
Claim 20
Dependent Claim
38 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in any of claim 1, wherein a part of content of Ni comprised in said sintered hard alloy is characteristically substituted by Cr.
Claim 21
Dependent Claim
36 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 19, wherein a part or whole of Cr comprised in said sintered hard alloy is characteristically substituted by V.
Claim 22
Dependent Claim
28 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 19, wherein a content of Cr mentioned above is characteristically 0.1-35%.
Claim 23
Dependent Claim
28 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 20, wherein a content of V mentioned above is characteristically 0.1-35%.
Claim 24
Dependent Claim
32 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 20, wherein the total content of both Cr and V mentioned above is characteristically 0.1-35%.
Claim 25
Dependent Claim
37 words
A sintered hard alloy with high strength, high toughness, and high corrosion resistance as specified in claim 1, wherein a ratio of Ni in the binding phase of said sintered hard alloy is characteristically 40% or more.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2003-02-28 | 2003-08-30 | 2004-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-28 | 2007-08-30 | 2008-02-29 | $3760.00 | Window Closed / Lapsed |
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