Patent US4873150A successfully refreshed from Google Patents.
US4873150A
Expired / Lapsed
US
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High water-resistant member, and valve gear using the same for use in internal combustion engine
Assignee: M H CENTER Ltd A CORP OF JAPAN
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Filing: 1987-10-26
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Granted: 1989-10-10
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Expires: 2007-10-26
Abstract
Abstract A wear-resistant metal member comprises a surface that has a sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater. The sprayed layer has a martensite-phase matrix containing carbide particles, nitride particles or carbonitride particles. In addition, the member of the present invention is produced by the steps of: plasma-spraying the above-described metal in a reduced pressure atmosphere; and quenching the thus-sprayed metal layer from a predetermined temperature to form a materisite phase in that layer. In addition, the sprayed metal layer may be subjected to carburizing, nitriding or carbonitriding to form a carburized, nitrided or carbonitrided layer in the sprayed metal layer. The member of the present invention has a high wear resistance and is used as a sliding portion of a valve gear in an internal combustion engine.
Inventors
- 👤 Masayuki Doi
- 👤 Naotatsu Asahi
- 👤 Yoshitaka Kojima
- 👤 Hisanobu Kanamaru
- 👤 Susumu Aoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:53
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/18; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12806; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
116 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, the sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 m or less and an areal ratio of 25 to 90%.
Claim 2
Dependent Claim
116 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, the sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 m or less and an areal ratio of 25 to 90%.
Claim 3
Dependent Claim
26 words
A wear resistant metal member according to claim 1, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 4
Dependent Claim
20 words
A wear-resistant metal member according claim 1, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 5
Dependent Claim
124 words
A wear resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, the sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 or greater and having a martenside-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and wherein numerous carbide particles are bonded together.
Claim 6
Dependent Claim
124 words
A wear resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, the sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 or greater and having a martenside-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and wherein numerous carbide particles are bonded together.
Claim 7
Dependent Claim
25 words
A wear-resistant metal member according to claim 4, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 8
Dependent Claim
21 words
A wear-resistant metal member according to claim 4, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 9
Dependent Claim
136 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, the sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 mm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 10
Dependent Claim
136 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, the sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 mm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 11
Dependent Claim
25 words
A wear-resistant metal member according to claim 7, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 12
Dependent Claim
21 words
A wear-resistant metal member according to claim 7, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 13
Dependent Claim
144 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, said sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrized layer, and wherein numerous carbide particles are bonded together.
Claim 14
Dependent Claim
144 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, said sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrized layer, and wherein numerous carbide particles are bonded together.
Claim 15
Dependent Claim
25 words
A wear-resistant metal member according to claim 10, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 16
Dependent Claim
21 words
A wear-resistant metal member according to claim 10, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 17
Dependent Claim
132 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, said sprayed layer consisting essentially of, by weight, 2.5 to 5% C, 25 to 35% Cr, 3 to 11% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being substantially Fe, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal having a ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 18
Dependent Claim
132 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, said sprayed layer consisting essentially of, by weight, 2.5 to 5% C, 25 to 35% Cr, 3 to 11% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being substantially Fe, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal having a ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 19
Dependent Claim
25 words
A wear-resistant metal member according to claim 13, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 20
Dependent Claim
21 words
A wear-resistant metal member according to claim 13, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 21
Dependent Claim
155 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, said sprayed layer consisting essentially of, by weight, 2.5 to 5% C, 25 to 35% Cr, 3 to 11% V, at least one selected from the group consisting of 2 to 15% Mo, 2 to 10% W, 0.5 to 5% Nb, 0.5 to 5% Ti, 0.5 to 5% Zr and 0.5 to 5% Hf, and the balance being substantially Fe in a proportion of 35% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less an a real ratio of 40 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer, and wherein numerous carbide particles are bonded together.
Claim 22
Dependent Claim
155 words
A wear-resistant metal member comprising a metal substrate having a surface and a hardened and tempered sprayed layer formed on said surface, said sprayed layer consisting essentially of, by weight, 2.5 to 5% C, 25 to 35% Cr, 3 to 11% V, at least one selected from the group consisting of 2 to 15% Mo, 2 to 10% W, 0.5 to 5% Nb, 0.5 to 5% Ti, 0.5 to 5% Zr and 0.5 to 5% Hf, and the balance being substantially Fe in a proportion of 35% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less an a real ratio of 40 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer, and wherein numerous carbide particles are bonded together.
Claim 23
Dependent Claim
25 words
A wear-resistant metal member according to claim 16, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 24
Dependent Claim
21 words
A wear-resistant metal member according to claim 16, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 25
Dependent Claim
126 words
A wear-resistant sliding mechanism comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90%.
Claim 26
Dependent Claim
126 words
A wear-resistant sliding mechanism comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90%.
Claim 27
Dependent Claim
24 words
A wear-resistant sliding member according to claim 14, wherein said martensite-phase contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 28
Dependent Claim
21 words
A wear-resistant sliding member according to claim 19, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 29
Dependent Claim
146 words
A wear-resistant sliding mechanism comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 30
Dependent Claim
146 words
A wear-resistant sliding mechanism comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 31
Dependent Claim
25 words
A wear-resistant sliding member according to claim 22, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 32
Dependent Claim
21 words
A wear-resistant sliding member according to claim 22, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 33
Dependent Claim
158 words
A valve gear for use in an internal combustion engine which is adapted to employ a thrust generated by the rotation of a cam wheel to cause a valve stem to reciprocally move, said valve gear comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90%.
Claim 34
Dependent Claim
158 words
A valve gear for use in an internal combustion engine which is adapted to employ a thrust generated by the rotation of a cam wheel to cause a valve stem to reciprocally move, said valve gear comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90%.
Claim 35
Dependent Claim
24 words
A valve gear according to claim 25, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 36
Dependent Claim
20 words
A valve gear according to claim 25, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
Claim 37
Dependent Claim
23 words
The valve gear according to claim 25, wherein said sprayed layer is a hard coating having a thickness of 0.1 to 0.75 mm.
Claim 38
Dependent Claim
20 words
The valve gear according to claim 25, wherein an oxygen content in said sprayed layer is 1500 ppm or less.
Claim 39
Dependent Claim
24 words
The valve gear according to claim 25, including a valve lifter, wherein a carbon content in said valve lifter body is 0.1 to 0.4%.
Claim 40
Dependent Claim
43 words
The valve gear according to claim 25, wherein a carbon concentration in the surface of said sprayed layer which comes into sliding contact with the cam wheel is higher than that in the portion of said sprayed layer adjacent to a base material.
Claim 41
Dependent Claim
143 words
A valve gear for use in an internal combustion engine which is adapted to employ a thrust generated by the rotation of a cam to cause a valve stem to reciprocally move, said valve stem having a sliding surface which comes into sliding contact with said cam and provided with a hardened and tempered coating consisting having a surface hardness of 1000 or greater, said by weight, 2 to 20% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, 80% or greater of the carbon content forming a carbide, and said hard coating and the body of a valve lifter being bonded together by a diffused layer.
Claim 42
Dependent Claim
143 words
A valve gear for use in an internal combustion engine which is adapted to employ a thrust generated by the rotation of a cam to cause a valve stem to reciprocally move, said valve stem having a sliding surface which comes into sliding contact with said cam and provided with a hardened and tempered coating consisting having a surface hardness of 1000 or greater, said by weight, 2 to 20% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, 80% or greater of the carbon content forming a carbide, and said hard coating and the body of a valve lifter being bonded together by a diffused layer.
Claim 43
Dependent Claim
21 words
A valve gear according to claim 32, wherein said coating further includes at least one of a nitride and a carbonitride.
Claim 44
Dependent Claim
19 words
A valve gear according to claim 32, wherein said coating has a surface hardness of 1200 Hv or greater.
Claim 45
Dependent Claim
177 words
A valve gear for use in an internal combustion engine which is adapted to employ a thrust generated by the rotation of a cam to cause a valve stem to reciprocally move, said valve gear comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 46
Dependent Claim
177 words
A valve gear for use in an internal combustion engine which is adapted to employ a thrust generated by the rotation of a cam to cause a valve stem to reciprocally move, said valve gear comprising metal members which are maintained in sliding contact with each other, at least one of said metal members having a sliding surface provided with a hardened and tempered sprayed layer consisting essentially of, by weight, 2 to 10% C, 18 to 60% Cr, 0.3 to 20% V, 25% or less Mo, 25% or less W, 10% or less Nb, 10% or less Ti, 10% or less Zr, 10% or less Hf and the balance being Fe in a proportion of 20% or greater, said sprayed layer having a surface hardness of 1000 Hv or greater and having a martensite-phase matrix containing at least carbide particles with a width of 3 μm or less and an areal ratio of 25 to 90% and said sprayed layer further having a surface provided with a carburized layer, a nitrided layer or a carbonitrided layer.
Claim 47
Dependent Claim
24 words
A valve gear according to claim 35, wherein said martensite-phase matrix contains carbide particles and at least one of nitride particles or carbonitride particles.
Claim 48
Dependent Claim
20 words
A valve gear according to claim 35, wherein said sprayed layer has a surface hardness of 1200 Hv or greater.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |