CN1837397A - Iron-base sintered alloy valve holder materials for internal combustion engine - Google Patents
Iron-base sintered alloy valve holder materials for internal combustion engine Download PDFInfo
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- CN1837397A CN1837397A CN 200610073982 CN200610073982A CN1837397A CN 1837397 A CN1837397 A CN 1837397A CN 200610073982 CN200610073982 CN 200610073982 CN 200610073982 A CN200610073982 A CN 200610073982A CN 1837397 A CN1837397 A CN 1837397A
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Abstract
The present invention provides a valve seat material made from an iron-based sintered alloy for an internal combustion engine, including hard particles of 10-60% by mass% dispersed in a matrix phase having Vickers' hardness of 500HV to 1,200HV0.1, wherein the matrix phase includes 0.3-1.5% C and one or more elements selected from among Ni, Co, Mo, Cr and V, in a total amount of 1 to 20%; and the hard particles have a composition comprising one or more intermetallic compounds from among an intermetallic compound containing Fe, Mo and Si as main components, an intermetallic compound containing Co, Mo and Si as main components and an intermetallic compound containing Ni, Mo and Si as main components. This valve seat material has a density of 6.7 g/cm<SUP>3</SUP>or higher and a radial compression strength of 350 MPa or higher.
Description
Technical field
The present invention relates to be used for the valve holder materials of oil engine, relate in particular to iron-base sintered alloy valve holder materials, it has the reverse wearing and tearing (oppositeaggressibity) of improved strength and abrasion resistance and reduction, is the preferred material of gaseous propellant engine.
Background technology
Because fuel and products of combustion can keep lubricated between valve and the valve seat liner (insert), therefore for example liquid fuel such as gasoline, diesel oil oil engine has suppressed the wearing and tearing of valve seat liner to a certain extent.Yet, utilize geseous fuel, the engine of liquefied petroleum gas (LPG) (LPG) and compressed natural gas (CNG) for example, in any case, all trend towards making between valve and the valve seat liner and to form contacting between metal and the metal, this has just increased the wearing and tearing of valve seat liner, because the amount Billy of the products of combustion that engine produces lacking with the engine generation of liquid fuel.Therefore, this just requires further to improve the wear resistance of the valve seat liner that is used for gaseous propellant engine.
A kind of well-known method that is used to improve valve seat liner wear resistance is exactly to scatter a large amount of grits, for example Fe-W type grit, Fe-Mo type grit, carbide type grit in the matrix of valve seat liner.Yet the increase of the grit amount of distribution has increased the unnecessary reverse wearing and tearing and the wearing and tearing of valve seat liner.
In order to address this problem, for example, Japanese uncensored public announcement of a patent application No.11-12697 has proposed a kind of valve seat liner that is used for oil engine, and it contains the cobalt-based grit of a kind of matrix and 26%-50 weight %.At least the C and the total amount that contain 0.5%-1.5 weight % in this matrix are Cr and/or the V of 0.5%-10.0 weight %, and optional contain at least a among Ni, Co that total amount is 2.0%-20.0 weight % and the Mo, and all the other are Fe.According to this announcement, the valve seat liner of producing by this disclosed technology is preferred for gaseous propellant engine, and it is exposed to the valve seat liner in the severe environment for use that often relates to metal and metallic contact wearing and tearing.
Japanese Patent No.2706561 has proposed a kind of valve seat liner that is used for oil engine, it contains C, Si, Cr, Ni, Mo, W, Co and the V of predetermined amount, all the other are Fe, and has porphyritic texture, it comprises the rapid tool steel phase that is made of the dispersive metal carbide particles, by the cobalt-base alloy hard phase that the dispersive intermetallic compound particle is constituted, the iron alloy that contains Co, Ni, Mo and C and is diffused into the intermediate phase that other form in mutually by the cobalt-base alloy hard mutually mutually.According to this announcement, can provide a kind of valve seat liner in this disclosed technology, it has the high temperature abrasion resistance of improvement, and has prolonged the work-ing life in the LPG oil engine.
Among the uncensored public announcement of a patent application No.2002-285293 of Japan a kind of valve holder materials that is used for heavy duty engine has been proposed, it contains Co, Mo, Cr, V, Si, C and the Ni of predetermined amount, all the other are Fe, and has bainite (or bainite and sorbitic mixture), the metal construction of martensite and austenite mixed, the hard phase that wherein is scattered here and there and constitutes by the molybdenum silicide core that is surrounded mutually by the cobalt diffusion.According to this announcement, can provide a kind of valve holder materials in this disclosed technology, it has the wear resistance of improvement and is preferred for heavy duty engine such as the CNG engine.
Summary of the invention
At present, require further to improve the performance of gaseous propellant engine.So the valve liner is about to be exposed in the severe more environment.Therefore need further to improve the intensity and the wear resisting property of valve seat liner; Unfortunately, the valve seat liner of being produced by above-mentioned well-known technology can not guarantee to reach the performance of desired satisfaction.
A target of the present invention is favourable solution these problems of the prior art and a kind of iron-base sintered alloy valve holder materials that is used for oil engine is provided, it has enough intensity, and also can have remarkable abrasion resistance properties in environment for use severe as gaseous propellant engine.
In order to reach above-mentioned target, the research that the present inventor is thorough influence many-sided factor of wearability.As the result of research, the inventor finds to have in a large number in matrix phase than the low oppositely dispersion of the grit of wearing and tearing, is very important for raising intensity and resistance to abrasion in environment for use severe as gaseous propellant engine.The inventor finds that also for a large amount of grit of dispersion stable in matrix phase, the material require of use has 6.7g/cm
3Or higher density, and have 350MPa or higher radial crushing strength.This has prevented that grit from peeling off from matrix phase, thereby has guaranteed that the life period that prolongs in the environment for use of sternness has high intensity and remarkable abrasion resistance.Thereby on the basis of these discoveries, finish the present invention after further research.
In other words, the invention provides a kind of iron-base sintered alloy valve holder materials that is used for oil engine.This valve holder materials comprises a kind of iron-base sintered alloy matrix phase, and it contains at least a among the C of 0.3%-1.5 quality % and Ni, Co, Mo, Cr and the V that total amount is 1%-20 quality %, and all the other are Fe and incidental impurities; Dispersive grit in matrix phase with 10%-60 quality %, it has the Vickers' hardness of 500-1200 HV0.1, and contain and be selected from following at least a intermetallic compound: a kind of intermetallic compound that mainly contains Fe, Mo and Si, a kind of intermetallic compound that mainly contains Co, Mo and Si, a kind of intermetallic compound that mainly contains Ni, Mo and Si.The density of this valve holder materials is 6.7g/cm
3Or bigger, radial crushing strength is 350MPa or higher.
This matrix phase can contain the C of 0.3%-1.5 quality %; Total amount is at least a among at least a and optional Cr among Ni, the Co of 1%-20 quality % and the Mo and the V.
This grit can be to be selected from following at least a intermetallic compound: a kind of intermetallic compound that mainly contains Fe, Mo and Si, a kind of intermetallic compound that mainly contains Co, Mo and Si, a kind of intermetallic compound that mainly contains Ni, Mo and Si, and the Si that may contain 1%-15 quality %, the Mo of 20%-60 quality %, at least a among Cr, Ni, Co and the Fe of 10%-70 quality %, all the other are incidental impurities.
This grit can be iron-based grit, cobalt-based grit, Ni-based grit, or their arbitrary combination.Described iron-based grit contains the Si of 1%-15 quality %, the Mo of 20%-60 quality %, and the Co of 25 optional quality % or Cr still less and/or 10%-40 quality %, all the other are iron and incidental impurities.Described cobalt-based grit contains the Si of 1%-15 quality %, the Mo of 20%-60 quality %, and the Cr of optional 5%-25 quality %, all the other are Co and incidental impurities.Described Ni-based grit contains the Si of 1%-15 quality %, the Mo of 20%-60 quality %, and the Cr of optional 5%-25 quality % and/or 10 quality % or Co still less, all the other are Ni and incidental impurities.
This valve holder materials can further comprise the solid lubricant of 0.2%-5 quality %.
This valve holder materials can be by repeating twice pressing mold sintering process or producing by forging sintering process.
The present invention has tangible industrial advantage, produces the valve seat liner that all has fabulous intensity and abrasion resistance in environment for use severe as gaseous propellant engine because it can be simple, stable.
Embodiment
The iron-base sintered alloy valve holder materials that is applied to oil engine as described in the present invention comprises iron-base sintered alloy matrix phase and dispersive grit wherein.In the following description, the quality % that is used to describe composition is abbreviated as % hereinafter.
The matrix phase of valve holder materials of the present invention comprises the C of 0.3%-1.5%, and total amount is at least a among Ni, Co, Mo, Cr, the V of being selected from of 1%-20%, and all the other are iron and incidental impurities.
At first, the reason that this matrix phase is formed is described in detail as follows:
C：0.3％-1.5％
Add the diffusion during C is used to quicken sintering.This element is dissolved in the matrix phase to improve its intensity.By contain 0.3% or more C can obtain this effect.Yet the C that contains more than 1.5% will form cementite and cause producing liquid phase in sintering process in matrix, thereby reduces the structural stability of matrix phase and cause the great variety of product size.So in the present invention, the C content in the matrix phase is controlled between the 0.3%-1.5%.
The element of at least a Ni of being selected from, Co, Mo, Cr and V: total amount is 1%-20%.
In the present invention, must contain total amount is 1% or the element of the more at least a Ni of being selected from, Co, Mo, Cr and V; These elements are used to improve the abrasion resistance of matrix.Yet, if the total content of these elements more than 20%, is disadvantageous economically, because the effect of these elements reaches capacity and can not expect that its effect and content match again.This valve holder materials preferably contains the element of at least a Ni of being selected from, Co and Mo, because these elements have bigger effect than Cr and V aspect raising hot strength and the toughness.Therefore, containing total amount in this valve holder materials is the element of at least a Ni of being selected from, Co, Mo, Cr and the V of 1%-20%, preferably contains total amount and is the element of at least a Ni of being selected from, the Co of 1%-20% and Mo and optional be selected from least a of Cr and V.
The surplus of this matrix phase comprises Fe and incidental impurities.
This matrix phase is except having above-mentioned composition, and iron-base sintered alloy valve holder materials of the present invention also comprises the grit of the 10%-60 quality % that is dispersed in the matrix phase, and it has the Vickers' hardness of 500-1200 HV0.1.
Grit is dispersed in the matrix phase to strengthen abrasion resistance.If the hardness of grit is lower than 500HV0.1, just can not guarantee desired abrasion resistance.On the other hand, if the hardness of grit is higher than 1200 HV0.1, oppositely wearing and tearing will improve.Therefore, the Vickers' hardness of grit is controlled between the 500-1200HV0.1.From resistance to wear, self-lubricating and the reverse angle of wearing and tearing, preferred substrate mutually in the dispersive grit contain and be selected from following at least a intermetallic compound: a kind of intermetallic compound that mainly contains Fe, Mo and Si; A kind of intermetallic compound that mainly contains Co, Mo and Si; A kind of intermetallic compound that mainly contains Ni, Mo and Si.Contain at least a among Cr, Ni, Co and the Fe of being selected from this intermetallic compound for the Mo of Si, the 20%-60% of the 1%-15% of grit total mass and 10%-70%.
Especially, be dispersed in the preferred iron-based grit of grit, cobalt-based grit, Ni-based grit or their arbitrary combination in the matrix phase among the present invention.Described iron-based grit contains the Si that accounts for grit total mass 1%-15%, the Mo of 20%-60%, and optional 25% or Cr still less, and/or the Co of 10%-40%, all the other are iron and incidental impurities.Described Co base grit contains the Si that accounts for grit total mass 1%-15%, the Mo of 20%-60%, and the Cr of optional 5%-25%, all the other are Co and incidental impurities.Described Ni-based grit contains the Si that accounts for grit total mass 1%-15%, the Mo of 20%-60%, and the Cr of optional 5%-25% and/or 10% or Co still less, all the other are nickel and incidental impurities.
If the hard particle content that is dispersed in the matrix phase is lower than 10% of valve holder materials total mass, just can not guarantee desired abrasion resistance.And if hard particle content so because high production cost is uneconomical, also cause low formability simultaneously, has improved reverse wearing and tearing and low matrix sticking power more than 60%.Therefore in the present invention, hard particle content is controlled at the 10%-60% of valve holder materials total mass.
Valve holder materials of the present invention can further contain the solid lubricant that accounts for valve holder materials total mass 0.2%-5%, to improve machinability.This solid lubricant can be distributed in the matrix phase with the protection cutting tool.In addition, this dispersive solid lubricant forms the starting point of cutting with further raising mechanical property.Used solid lubricant example comprises sulfide for example MnS and MoS
2, fluorochemical CaF for example
2, and oxide compound MgSiO for example
2If the content of solid lubricant is lower than 0.2%, solid lubricant just can not reach above-mentioned effect.And if the content of solid lubricant is higher than 5%, will reduce intensity.Therefore, the content of solid lubricant preferably is controlled at 0.2%-5 quality %, preferred 0.5%-3 quality %.
In addition, valve holder materials density of the present invention is 6.7g/cm
3Or bigger, radial crushing strength is 350MPa or higher.Radial crushing strength used herein is measured according to JIS (Japanese Industrial Standards) Z 2507.
If valve holder materials density is less than 6.7g/cm
3, because valve holder materials lacks between grit and matrix and combine and show as abrasion resistance and reduce, thereby valve holder materials does not just have desired abrasion resistance in the environment for use of sternness as gaseous propellant engine.Therefore, the density of valve holder materials is defined as 6.7g/cm
3Or bigger, preferred 6.8g/cm
3Or it is bigger.
In addition, the radial crushing strength of valve holder materials of the present invention is 350MPa or higher, to improve combining between grit and the matrix, guarantees to have desired abrasion resistance in the environment for use of sternness as gaseous propellant engine.If radial crushing strength is lower than 350MPa, valve holder materials will lack between grit and matrix and combines, thereby reduces wear resistance.This valve holder materials also is easy to generate for example crackle and breach when being processed to valve seat liner (product).The radial crushing strength of valve holder materials is preferably 450MPa or higher.
Valve holder materials of the present invention is preferably by repeating twice pressing mold sintering process or produce by forging sintering process, guarantees above-mentioned density and radial crushing strength with stable.
Next, a kind of method that preferably is used to produce valve holder materials of the present invention is described below:
By adding Graphite Powder 99, at least a powder that is selected from nickel powder, molybdenum powder and cobalt powder in straight iron powder, and optional chromium powder and at least a raw material powder for preparing in the vanadium powder be as alloying element powder, to reach the composition of above-mentioned matrix phase.Add grit powder then, to reach above-mentioned hard particle content with above-mentioned hardness and composition.In addition, Ren Xuan interpolation solid lubricant powder is to reach above-mentioned solid lubrication agent content.In addition, preferably add for example Zinic stearas of a kind of lubricant.These powder mixes are also stirred with the preparation mixed powder.In the present invention, above-mentioned matrix phase is formed and can be added the alloying element powder of predetermined amount in straight iron powder by as mentioned above, and/or the low alloy steel powder or the ferroalloy powder that contain alloying element of adding predetermined amount obtains in pure iron powder.
Mixed powder is joined in the mould of valve seat shape then with predetermined size.Mixed powder preferably is molded as sintering briquette (valve holder materials) by repeating twice pressing mold sintering process.In other words, mixed powder can by mixed powder wherein by pressing mold and the first first pressing mold sintering process of agglomerating and by the first agglomerating sintering briquette that wherein obtains by pressing mold and agglomerating once more once more the pressing mold sintering process process.The sintering briquette (valve holder materials) that is come out by these explained hereafter has desired density and radial crushing strength.
Pressing mold is preferably finished by for example compactings such as mechanical compaction and hydraulic pressure system.Sintering preferably passes through in reducing atmosphere or in a vacuum, finishes 1100 ℃ of-1200 ℃ of heating.
In the present invention, forge sintering process and can replace repetition pressing mold sintering process.
Low melting point metal, for example Pb, Cu and Zn may penetrate in the hole of gained sintering briquette, with further raising abrasion resistance and oppositely wearing and tearing of reduction.
Gained sintering briquette (valve holder materials) can be chosen cutting wantonly to produce the valve seat cushioning product.
Embodiment
The present invention is described in detail by following examples.
Pure iron powder is mixed with alloying element powder to form matrix phase as shown in table 1 and is formed, mix with the solid lubricant of type as shown in table 2 and the grit of hardness and amount as shown in table 1, kind as shown in table 1 and amount with as the Zinic stearas of lubricant, and stir with the preparation mixed powder with the V-type agitator.Content as the Zinic stearas of lubricant is 1.0% of pure iron powder, alloying element powder, grit and solid lubricant gross weight.
In certain embodiments, pure iron powder and alloying element powder part is by low alloy steel powder A (Cr:3.0 quality %; Mo:0.2 quality %; V:0.3 quality %; All the other: Fe) or low alloy steel powder B (Cr:1.0 quality %; Mo:0.3 quality %; All the other: Fe) replace.
At first, mixed powder is encased in the mould, utilizes mechanical compaction to make its pressing mold, form and to have the valve seat shape, be of a size of the pressed compact of diameter 27mm * diameter 22mm * 7.0mm.Then this pressed compact tentatively is sintered into elementary sintering briquette.The elementary sintering briquette of gained is put into the mould that final size is the valve seat shape of diameter 27mm * diameter 22mm * 6.5mm, utilize hydraulic pressure pressing mold once more, and sintering once more.Like this, by repeating twice pressing mold sintering process (2P2S), mixed powder is processed to sintering briquette.Some valve holder materials are by forging sintering process production, and wherein the sintering briquette that pressing mold sintering process (1P1S) back is formed forges sintering (FS).Sintering is heat-treated (sintering processes) under 1160 ℃ of reducing atmospheres.
The gained sintering briquette is used for producing the valve seat liner as valve holder materials.The valve seat liner is estimated with density, radial crushing strength and abrasion resistance.
Density is measured by Archimedes's method.Radial crushing strength is measured according to JIS Z 2507.Abrasion resistance is estimated by following test.
The valve seat liner of each gained is all put into the natural gas engine of the embedded four cylinder four-stroke of a 2000cc, all drives with 6000rpm/WOT (maximum throttle) in its 24 hours.The used valve that matches is to be made by high temperature steel SUH35 (JIS), and valve surface is covered with Tribaloy
TMAbrasion resistance is weighed by the valve wearing depth of measuring valve seat liner and exhaust side.
The result is as shown in table 3.
Table 1
| The valve seat numbering | Sintering briquette | Manufacturing process | Remarks | |||||||||||
| Matrix phase is formed (quality %) | Grit | Solid lubricant | ||||||||||||
| C | Ni，Co，Mo，Cr，V | Surplus | Type * | Content (quality %) | Type | Content (quality %) | ||||||||
| Ni | Co | Cr | Mo | V | Amount to | |||||||||
| 1 | 1.0 | 2.0 | - | - | - | - | 2.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 2 | 1.0 | - | 4.0 | - | - | - | 4.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 3 | 1.0 | - | - | - | 5.0 | - | 5.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 4 | 1.0 | - | - | - | - | 2.0 | 2.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 5 | 1.0 | - | 4.0 | 3.0 | - | - | 7.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 6 | 1.0 | - | 4.0 | - | 0.1 | - | 4.1 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 7 | 1.0 | 4.0 | 4.0 | - | 0.2 | - | 8.2 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 8 | 1.0 | 4.0 | 4.0 | 3.0 | 0.1 | 0.2 | 11.3 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 9 | 1.0 | - | 4.0 | - | - | - | 4.0 | Fe | A1 | 12 | - | - | 2P2S | The embodiment of the invention |
| 10 | 1.0 | 5.0 | - | - | - | - | 5.0 | Fe | A1 | 35 | - | - | 2P2S | The embodiment of the invention |
| 11 | 1.0 | 6.0 | - | - | - | - | 6.0 | Fe | A1 | 55 | - | - | 2P2S | The embodiment of the invention |
| 12 | 0.4 | 6.0 | - | - | - | - | 6.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 13 | 1.3 | 6.0 | - | - | - | - | 6.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 14 | 1.0 | - | - | 3.0 | - | - | 3.0 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 15 | 1.0 | - | 4.0 | - | - | - | 4.0 | Fe | A1 | 15 | - | - | 2P2S | The embodiment of the invention |
| 16 | 1.0 | - | - | 2.0 | 0.1 | 0.2 | 2.3 | Fe | A1 | 40 | - | - | 2P2S | The embodiment of the invention |
| 17 | 1.0 | 10.0 | 6.0 | 2.0 | 0.1 | 0.2 | 18.3 | Fe | A1 | 40 | MnS | 2 | 2P2S | The embodiment of the invention |
| 18 | 1.0 | 5.0 | - | - | - | - | 5.0 | Fe | A1 | 40 | MnS | 2 | 2P2S | The embodiment of the invention |
| 19 | 1.0 | 4.0 | - | - | - | - | 4.0 | Fe | A2 | 40 | MnS | 2 | 2P2S | The embodiment of the invention |
| 20 | 1.0 | 5.0 | - | - | - | - | 5.0 | Fe | A1 | 15 | MnS | 2 | 2P2S | The embodiment of the invention |
| 21 | 1.0 | 8.0 | 4.0 | 2.0 | 0.1 | 0.2 | 14.3 | Fe | A3 | 40 | MnS | 2 | 2P2S | The embodiment of the invention |
| 22 | 1.0 | 8.0 | 5.0 | - | 0.1 | - | 13.1 | Fe | A1 | 40 | MnS | 2 | 2P2S | The embodiment of the invention |
| 23 | 1.0 | 8.0 | 4.0 | 2.0 | 0.1 | 0.2 | 14.3 | Fe | A1 | 40 | CaF2 | 4 | 2P2S | The embodiment of the invention |
| 24 | 1.0 | 9.0 | 4.0 | 2.0 | 0.1 | 0.2 | 15.3 | Fe | A1 | 40 | MgSiO2 | 2 | 2P2S | The embodiment of the invention |
| 25 | 1.0 | 10.0 | 4.0 | 2.0 | 0.1 | 0.2 | 16.3 | Fe | A1 | 50 | MnS | 2 | FS | The embodiment of the invention |
| 26 | 1.0 | 9.0 | 4.0 | 5.0 | 5.0 | 0.2 | 23.2 | Fe | A1 | 40 | - | - | 2P2S | Comparative Examples |
| 27 | 1.0 | 6.0 | - | - | - | - | 6.0 | Fe | A1 | 7 | - | - | 2P2S | Comparative Examples |
| 28 | 1.0 | - | 4.0 | - | - | - | 4.0 | Fe | A1 | 65 | - | - | 2P2S | Comparative Examples |
| 29 | 0.2 | - | 5.0 | - | - | - | 5.0 | Fe | A1 | 40 | - | - | 2P2S | Comparative Examples |
| 30 | 1.7 | - | 4.0 | - | - | - | 4.0 | Fe | A1 | 40 | - | - | 2P2S | Comparative Examples |
| 31 | 1.0 | - | - | 3.0 | - | - | 3.0 | Fe | A1 | 40 | - | - | 1P1S | Comparative Examples |
| 32 | 1.0 | 6.0 | 4.0 | 3.0 | 2.0 | 2.0 | 17.0 | Fe | A1 | 40 | - | - | 1P1S | Comparative Examples |
| 33 | 0.1 | - | - | 3.0 | - | - | 3.0 | Fe | A1 | 40 | - | - | 1P1S | Comparative Examples |
| 34 | 1.8 | - | - | 3.0 | - | - | 3.0 | Fe | A1 | 40 | - | - | 1P1S | Comparative Examples |
| 35 | 1.0 | - | - | - | - | - | - | Fe | A4 | 20 | MnS | 2 | 2P2S | Comparative Examples |
| 36 | 1.0 | 10.0 | 4.0 | - | - | - | 14.0 | Fe | A4 | 40 | MnS | 2 | 2P2S | Comparative Examples |
| 37 | 1.0 | - | - | - | - | - | - | Fe | A5 | 40 | MnS | 2 | 1P1S | Comparative Examples |
| 38 | 1.0 | 10.0 | 4.0 | 2.0 | 0.1 | 0.2 | 16.3 | Fe | A1 | 70 | MnS | 8 | 2P2S | Comparative Examples |
*) reference table 2
Table 2
| Type designations | Type | Form (quality %) | Hardness HV | ||||
| Mo | Si | Cr | Other | Surplus | |||
| A1 | Compound between the Mo-Si-Co shaped metal | 28 | 2.5 | 9 | - | Co | 750 |
| A2 | Compound between the Mo-Si-Fe shaped metal | 48 | 12 | - | Co：20 | Fe | 950 |
| A3 | Compound between the Mo-Si-Ni shaped metal | 33 | 3.5 | 16 | - | Ni | 600 |
| A4 | The Fe-Mo type | 60 | - | - | - | Fe | 1200 |
| A5 | Compound between the C-Cr-W-Co shaped metal | - | - | 65 | C：1.5，W：20，Co：10 | Fe | 1200 |
Table 3
| The valve seat numbering | Test result | Remarks | |||
| Density (g/cm 3) | Radial crushing strength (MPa) | Durable test | |||
| Exhaust side wearing depth (μ m/h) | |||||
| The valve seat liner | Valve | ||||
| 1 | 7.03 | 760 | 0.24 | 0.02 | The embodiment of the invention |
| 2 | 7.06 | 840 | 0.25 | 0.02 | The embodiment of the invention |
| 3 | 6.98 | 710 | 0.23 | 0.05 | The embodiment of the invention |
| 4 | 6.96 | 680 | 0.22 | 0.02 | The embodiment of the invention |
| 5 | 6.92 | 650 | 0.24 | 0.03 | The embodiment of the invention |
| 6 | 7.05 | 640 | 0.23 | 0.04 | The embodiment of the invention |
| 7 | 6.91 | 630 | 0.26 | 0.03 | The embodiment of the invention |
| 8 | 6.90 | 510 | 0.23 | 0.02 | The embodiment of the invention |
| 9 | 7.05 | 920 | 0.35 | 0.01 | The embodiment of the invention |
| 10 | 6.94 | 770 | 0.27 | 0.02 | The embodiment of the invention |
| 11 | 6.87 | 460 | 0.25 | 0.12 | The embodiment of the invention |
| 12 | 6.69 | 590 | 0.28 | 0.05 | The embodiment of the invention |
| 13 | 6.90 | 690 | 0.24 | 0.05 | The embodiment of the invention |
| 14 | 6.95 | 650 | 0.28 | 0.03 | The embodiment of the invention |
| 15 | 7.08 | 920 | 0.32 | 0.04 | The embodiment of the invention |
| 16 | 7.01 | 560 | 0.22 | 0.02 | The embodiment of the invention |
| 17 | 6.85 | 520 | 0.19 | 0.06 | The embodiment of the invention |
| 18 | 6.98 | 710 | 0.25 | 0.03 | The embodiment of the invention |
| 19 | 6.93 | 640 | 0.27 | 0.06 | The embodiment of the invention |
| 20 | 7.02 | 860 | 0.38 | 0.04 | The embodiment of the invention |
| 21 | 6.89 | 550 | 0.24 | 0.04 | The embodiment of the invention |
| 22 | 6.93 | 570 | 0.22 | 0.03 | The embodiment of the invention |
| 23 | 6.72 | 420 | 0.30 | 0.04 | The embodiment of the invention |
| 24 | 6.87 | 530 | 0.18 | 0.02 | The embodiment of the invention |
| 25 | 7.45 | 580 | 0.29 | 0.11 | The embodiment of the invention |
| 26 | 6.58 | 210 | 0.42 | 0.16 | Comparative Examples |
| 27 | 6.93 | 610 | 0.51 | 0.01 | Comparative Examples |
| 28 | 6.54 | 320 | 0.41 | 0.21 | Comparative Examples |
| 29 | 6.68 | 310 | 0.47 | 0.11 | Comparative Examples |
| 30 | 6.64 | 350 | 0.28 | 0.15 | Comparative Examples |
| 31 | 6.70 | 310 | 0.48 | 0.13 | Comparative Examples |
| 32 | 6.65 | 260 | 0.49 | 0.14 | Comparative Examples |
| 33 | 6.65 | 210 | 0.52 | 0.10 | Comparative Examples |
| 34 | 6.64 | 270 | 0.51 | 0.11 | Comparative Examples |
| 35 | 7.00 | 660 | 1.53 | 0.24 | Comparative Examples |
| 36 | 6.98 | 590 | 1.28 | 0.46 | Comparative Examples |
| 37 | 6.62 | 390 | 1.79 | 0.81 | Comparative Examples |
| 38 | 6.58 | 150 | 0.68 | 0.31 | Comparative Examples |
Above result shows, even in the environment for use of sternness, promptly at the exhaust side of gaseous propellant engine, is that valve seat liner or the valve that matches all have less wearing depth in the embodiment of the invention.Therefore the result proves that the seat material in the embodiment of the invention has higher abrasion resistance and lower reverse wearing and tearing.
By contrast, this result shows that also in the Comparative Examples outside the scope of the invention, valve seat liner and supporting valve all have bigger wearing depth.This result shows that the valve holder materials in the Comparative Examples has low abrasion resistance and high reverse wearing and tearing.
Claims (6)
1, a kind of iron-base sintered alloy valve holder materials that is used for oil engine comprises:
The iron-base sintered alloy matrix phase, it contains the C of 0.3%-1.5 quality %, and total amount is at least a among Ni, Co, Mo, Cr and the V of being selected from of 1%-20 quality %, and all the other are iron and incidental impurities; With
Be dispersed in the grit of the 10%-60 quality % in the matrix phase, its Vickers' hardness is 500-1200HV0.1, and contains and be selected from following at least a intermetallic compound: a kind of intermetallic compound that mainly contains Fe, Mo and Si; A kind of intermetallic compound that mainly contains Co, Mo and Si; A kind of intermetallic compound that mainly contains Ni, Mo and Si,
The density of valve holder materials is 6.7g/cm
3Or bigger, radial crushing strength is 350MPa or higher.
2, the iron-base sintered alloy valve holder materials that is used for oil engine as claimed in claim 1, wherein said matrix phase contains:
The C of 0.3%-1.5 quality %; With
Total amount is that at least a and optional among Ni, Co and the Mo of being selected from of 1%20 quality % is selected from least a among Cr and the V.
3, the iron-base sintered alloy valve holder materials that is used for oil engine as claimed in claim 1 or 2, grit wherein contains and is selected from following at least a intermetallic compound: a kind of intermetallic compound that mainly contains Fe, Mo and Si, a kind of intermetallic compound that mainly contains Co, Mo and Si; A kind of intermetallic compound that contains Ni, Mo and Si, and contain at least a among Cr, Ni, Co and the Fe of being selected from of the Mo of Si, 20%-60 quality % of 1%-15 quality % and 10%70 quality %, all the other are incidental impurities.
4, the iron-base sintered alloy valve holder materials that is used for oil engine as claimed in claim 3, wherein grit comprises the iron-based grit, bores basic grit and Ni-based grit, or their arbitrary combination,
Contain Mo and 25 quality % that choose wantonly or the Co of Cr still less and/or 10%-40 quality % of Si, the 20%-60 quality % of 1%-15 quality % in the iron-based grit, all the other are Fe and incidental impurities,
Co base grit contains the Mo of Si, the 20%-60 quality % of 1%-15 quality %, the Cr of optional 5%-25 quality %, and all the other are Co and incidental impurities,
Ni-based grit contains the Mo of Si, the 20%-60 quality % of 1%-15 quality %, Cr and/or 10 quality % or the Co still less of optional 5%-25 quality %, and all the other are Ni and incidental impurities.
5,, also contain the solid lubricant of 0.2%-5 quality % as any described iron-base sintered alloy valve holder materials that is used for oil engine in the claim 1 to 4.
6, as any described iron-base sintered alloy valve holder materials that is used for oil engine in the claim 1 to 5, it is by repeating twice pressing mold sintering process or producing by forging sintering process.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005084152 | 2005-03-23 | ||
| JP2005084152 | 2005-03-23 | ||
| JP2005-084152 | 2005-03-23 | ||
| JP2006-046138 | 2006-02-23 | ||
| JP2006046138 | 2006-02-23 |
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| CN1837397A true CN1837397A (en) | 2006-09-27 |
| CN100422376C CN100422376C (en) | 2008-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100739822A Active CN100422376C (en) | 2005-03-23 | 2006-03-23 | Iron-base sintered alloy valve holder materials for internal combustion engine |
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| CN (1) | CN100422376C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2446911B (en) * | 2005-10-12 | 2010-03-31 | Hitachi Powdered Metals | Manufacturing method for wear resistant sintered member, sintered valve seat, and manufacturing method therefor |
| CN102653045A (en) * | 2011-03-03 | 2012-09-05 | 上海广凌气门座有限公司 | Method for manufacturing valve seat of automobile engine |
| CN102762755A (en) * | 2010-02-23 | 2012-10-31 | 株式会社理研 | Valve seat |
| CN103328776A (en) * | 2011-01-20 | 2013-09-25 | 株式会社理研 | Iron-based sintered alloy valve seat |
| CN104561769A (en) * | 2013-10-11 | 2015-04-29 | 丰田自动车株式会社 | Wear-resistant iron-based sintered metal |
| CN104946966A (en) * | 2014-03-31 | 2015-09-30 | 日本活塞环株式会社 | Iron-base sintered alloy material for valve seat insert and method for manufacturing the same |
| CN108677079A (en) * | 2018-04-18 | 2018-10-19 | 燕山大学 | A kind of austenitic alloy and preparation method thereof strengthened based on the second class loading |
| CN109312669A (en) * | 2016-04-20 | 2019-02-05 | 皮尔伯格有限责任公司 | Exhaust gas valve arrangement for internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002285293A (en) * | 2001-03-27 | 2002-10-03 | Hitachi Powdered Metals Co Ltd | Valve seat material for high load engine and production method therefor |
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2006
- 2006-03-23 CN CNB2006100739822A patent/CN100422376C/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2446911B (en) * | 2005-10-12 | 2010-03-31 | Hitachi Powdered Metals | Manufacturing method for wear resistant sintered member, sintered valve seat, and manufacturing method therefor |
| US7892481B2 (en) | 2005-10-12 | 2011-02-22 | Hitachi Powdered Metals Co., Ltd. | Manufacturing method for wear resistant sintered member, sintered valve seat, and manufacturing method therefor |
| US8844903B2 (en) | 2010-02-23 | 2014-09-30 | Kabushiki Kaisha Riken | Valve seat |
| CN102762755A (en) * | 2010-02-23 | 2012-10-31 | 株式会社理研 | Valve seat |
| CN102762755B (en) * | 2010-02-23 | 2014-08-06 | 株式会社理研 | Valve seat |
| CN103328776A (en) * | 2011-01-20 | 2013-09-25 | 株式会社理研 | Iron-based sintered alloy valve seat |
| CN102653045A (en) * | 2011-03-03 | 2012-09-05 | 上海广凌气门座有限公司 | Method for manufacturing valve seat of automobile engine |
| CN104561769A (en) * | 2013-10-11 | 2015-04-29 | 丰田自动车株式会社 | Wear-resistant iron-based sintered metal |
| CN104946966A (en) * | 2014-03-31 | 2015-09-30 | 日本活塞环株式会社 | Iron-base sintered alloy material for valve seat insert and method for manufacturing the same |
| CN104946966B (en) * | 2014-03-31 | 2017-04-12 | 日本活塞环株式会社 | Iron-base sintered alloy material for valve seat insert and method for manufacturing the same |
| US9803268B2 (en) | 2014-03-31 | 2017-10-31 | Nippon Piston Ring Co., Ltd. | Iron-base sintered alloy material for valve seat insert and method for manufacturing the same |
| CN109312669A (en) * | 2016-04-20 | 2019-02-05 | 皮尔伯格有限责任公司 | Exhaust gas valve arrangement for internal combustion engine |
| CN108677079A (en) * | 2018-04-18 | 2018-10-19 | 燕山大学 | A kind of austenitic alloy and preparation method thereof strengthened based on the second class loading |
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