CN105316600A - Valve seat - Google Patents
Valve seat Download PDFInfo
- Publication number
- CN105316600A CN105316600A CN201510454867.9A CN201510454867A CN105316600A CN 105316600 A CN105316600 A CN 105316600A CN 201510454867 A CN201510454867 A CN 201510454867A CN 105316600 A CN105316600 A CN 105316600A
- Authority
- CN
- China
- Prior art keywords
- valve seat
- weight
- tissue
- volume
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011651 chromium Substances 0.000 claims abstract description 17
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 16
- 239000010941 cobalt Substances 0.000 claims abstract description 16
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 16
- 239000011733 molybdenum Substances 0.000 claims abstract description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 13
- 239000011572 manganese Substances 0.000 claims abstract description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 7
- 239000010937 tungsten Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910001563 bainite Inorganic materials 0.000 claims description 27
- 239000010949 copper Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000005864 Sulphur Substances 0.000 claims description 8
- 230000008595 infiltration Effects 0.000 claims description 8
- 238000001764 infiltration Methods 0.000 claims description 8
- 229910021332 silicide Inorganic materials 0.000 claims description 8
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 8
- 229910001566 austenite Inorganic materials 0.000 claims description 6
- 229910000734 martensite Inorganic materials 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 8
- 230000013011 mating Effects 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004939 coking Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017816 Cu—Co Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 229910002551 Fe-Mn Inorganic materials 0.000 description 1
- 229910017116 Fe—Mo Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
Abstract
The present disclosure relates to a valve seat, and the valve seat includes 0.8 to 1.7 wt% of carbon (C), 0.5 to 1.5 wt% of silicon (Si), 0.5 to 1.5 wt% of manganese (Mn), 0.01 to 1.0 wt% of sulfur (S), 2.0 to 6.0 wt% of chromium (Cr), 7.0 to 16.0 wt% of molybdenum (Mo), 2.0 to 8.0 wt% of nickel (Ni), 0.01 to 3.0 wt% of tungsten (W), 0.01 to 1.0 wt% of vanadium (V), 14.0 to 25.0 wt% of cobalt (Co), and the balance of iron and impurities.
Description
Technical field
The present invention relates to the valve seat for gas engine or diesel motor.
Background technology
Generally, be adjacent to as the valve seat of engine pack and valve face and play and keep bubble-tight effect.Also continue to contact with valve face because this valve seat is exposed in high-temperature combustion gas, therefore require that there is the physical property such as thermotolerance and wear resistance.
In order to ensure physical property as above, have in the raw material proposed for the preparation of valve seat before and include lead (Pb) to prepare the technology (with reference to following prior art document) of valve seat.Like this good and cheap containing plumbous valve seat wear resistance, but it comprises the lead (Pb) causing environmental problem, therefore its use range is restricted, and its have in high temperature environments can the problem of melting.
And have to propose to use and comprise if the raw material of the solid particles such as Fe-Mo or Fe-Cr is to prepare the technology of valve seat, but the wear resistance of this valve seat is too high, has the problem bringing damage to mating member valve on the contrary.
Summary of the invention
The problem solved
In order to solve the problem a little, the object of the invention is to provide the valve seat of the physical properties excellent such as thermotolerance and wear resistance.
The means of dealing with problems
In order to achieve the above object, the invention provides a kind of valve seat, it comprises: the carbon (C) of 0.8 % by weight ~ 1.7 % by weight, the silicon (Si) of 0.5 % by weight ~ 1.5 % by weight, the manganese (Mn) of 0.5 % by weight ~ 1.5 % by weight, the sulphur (S) of 0.01 % by weight ~ 1.0 % by weight, the chromium (Cr) of 2.0 % by weight ~ 6.0 % by weight, the molybdenum (Mo) of 7.0 % by weight ~ 16.0 % by weight, the nickel (Ni) of 2.0 % by weight ~ 8.0 % by weight, the tungsten (W) of 0.01 % by weight ~ 3.0 % by weight, the vanadium (V) of 0.01 % by weight ~ 1.0 % by weight, the cobalt (Co) of 14.0 % by weight ~ 25.0 % by weight and the iron (Fe) of surplus and impurity.
Comprise in valve seat tissue of the present invention like this: the tissue that bainite structure comprises the silicide that cobalt (Co) and molybdenum (Mo) combine comprises martensitic stucture and the austenite structure of chromium double carbide.
Now, with the total 100 volume % of valve seat for benchmark, above-mentioned bainite structure is preferably 2 volume % ~ 12 volume %.
In addition, on the cross section that obtains cutting off valve seat of above-mentioned bainite structure, shared area ratio is preferably 2% ~ 12% of section area.
On the one hand, valve seat of the present invention can have copper (Cu) or copper alloy by infiltration in in-house pore.
In addition, valve seat of the present invention also can be combined with iron system sinter.
Invention effect
Valve seat of the present invention comprises the carbon of specified range, silicon, manganese, sulphur, chromium, molybdenum, nickel, tungsten, vanadium and cobalt, the therefore physical properties excellent such as thermotolerance and wear resistance.In addition, valve seat of the present invention containing plumbous (Pb), can not reduce the generation of environmental problem.
Accompanying drawing explanation
Fig. 1 is the stereographic map of diagram according to the valve seat of an example of the present invention.
Fig. 2 is the reference drawing for illustration of experimental example 1 of the present invention.
Fig. 3 analyzes the image according to the cross section of the valve seat of embodiments of the invention 1.
Fig. 4 is the reference drawing for illustration of embodiments of the invention 4.
Embodiment
Below, the present invention is described.
1, valve seat
Valve seat of the present invention comprises the carbon of specified range, silicon, manganese, sulphur, chromium, molybdenum, nickel, tungsten, vanadium and cobalt, and therefore the physical properties excellent such as thermotolerance and wear resistance, illustrates as follows to this.
The carbon (C) of 0.8 % by weight ~ 1.7 % by weight is comprised in valve seat gross weight of the present invention.If carbon content is less than 0.8 % by weight, then the formation of the in-house carbide tissue of valve seat can reduce, if more than 1.7 % by weight, then can remain ferritic structure in valve seat tissue, therefore the wear resistance of valve seat can reduce.Thus, the carbon of above-mentioned scope is preferably comprised.
The silicon (Si) of 0.5 % by weight ~ 1.5 % by weight is comprised in valve seat gross weight of the present invention.If silicone content is less than 0.5 % by weight, then the generation that molybdenum (Mo) and cobalt (Co) combine the silicide generated can reduce, and the wear resistance of valve seat can reduce, if more than 1.5. % by weight, then when preparing valve seat, compressibility and coking property can reduce.Thus, the silicon of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the manganese (Mn) of 0.5 % by weight ~ 1.5 % by weight.If manganese containing quantity not sufficient 0.5 % by weight, then the processibility of valve seat can reduce, if more than 1.5 % by weight, then when preparing valve seat, compressibility and coking property can reduce.Thus, the manganese of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the sulphur of 0.01 % by weight ~ 1.0 % by weight.If sulfur content is less than 0.01 % by weight, then the generation of the binding substances of sulphur and manganese can reduce, if more than 1.0 % by weight, then can form excess carbides tissue in valve seat tissue, therefore when preparing valve seat, processibility can reduce.Thus, the sulphur of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the chromium (Cr) of 2.0 % by weight ~ 6.0 % by weight.If chromium is containing quantity not sufficient 2.0 % by weight, the then formation meeting of the interior carbide tissue of valve seat tissue, thus the wear resistance of valve seat can reduce, if more than 6.0 % by weight, when then preparing valve seat, compressibility and coking property can reduce, thus wear resistance becomes too high, the degree of damage is brought to uprise therefore to mating member valve.Thus, the chromium of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the molybdenum (Mo) of 7.0 % by weight ~ 16.0 % by weight.If molybdenum content is less than 7.0 % by weight, then the generation of silicide that cobalt and molybdenum combine can reduce, thus the wear resistance of valve seat can reduce, if more than 16.0 % by weight, then when preparing valve seat, compressibility can reduce.Thus, the molybdenum of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the nickel (Ni) of 2.0 % by weight ~ 8.0 % by weight.If nickel (Ni) is containing quantity not sufficient 2.0 % by weight, then the formation of the in-house austenite structure of valve seat can reduce, thus the wear resistance of valve seat and thermotolerance can reduce, if more than 8.0 % by weight, then the toughness of valve seat can become too high and the formation of bainite structure can reduce, thus the wear resistance of valve seat can reduce.Thus, the nickel of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the tungsten (W) of 0.01 % by weight ~ 3.0 % by weight.If W content is less than 0.01 % by weight, in valve seat tissue, the formation of carbide tissue can reduce, thus the wear resistance of valve seat can reduce, if more than 3.0 % by weight, then the wear resistance of valve seat becomes too high, brings the degree of damage to uprise therefore to mating member valve.Thus, the tungsten of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the vanadium (V) of 0.01 % by weight ~ 1.0 % by weight.If vanadium (V) containing quantity not sufficient 0.01 % by weight, then the formation of the interior carbide tissue of valve seat tissue can reduce, thus the wear resistance of valve seat can reduce, if more than 1.0 % by weight, then when preparing valve seat, compressibility and coking property can reduce.Thus, the vanadium (V) of above-mentioned scope is preferably comprised.
In valve seat gross weight of the present invention, comprise the cobalt (Co) of 14.0 % by weight ~ 25.0 % by weight.If cobalt contents is less than 14.0 % by weight, the generation of the silicide that cobalt and molybdenum combine can reduce, thus the wear resistance of valve seat and thermotolerance can reduce, if more than 25.0 % by weight, when preparing valve seat, compressibility and coking property can reduce.Thus, the cobalt of above-mentioned scope is preferably comprised.
Valve seat of the present invention also comprises iron (Fe) and the impurity (such as, phosphorus (P), sulphur (S) etc.) of surplus except mentioned component.
Preferably coexist in the tissue of valve seat of the present invention like this bainite structure, comprise the tissue of the silicide that cobalt (Co) and molybdenum (Mo) combine, comprise martensitic stucture and the austenite structure of chromium double carbide.When above-mentioned tissue coexists, wear resistance and excellent heat resistance can be provided, and to the valve seat that mating member valve brings the degree of damage minimum.
That is, the martensitic stucture comprising chromium double carbide can improve the wear resistance of valve seat, but when this tissue Individual existence, the wear resistance of valve seat can become too high and bring the degree of damage also can uprise to mating member valve.But, coexist together in valve seat of the present invention martensitic stucture, less damage is brought to mating member valve and the bainite structure of valve seat wear resistance can be improved and the austenite structure of valve seat toughness can be guaranteed, therefore excellent in abrasion resistance and the degree of injury that mating member valve is brought can be minimized.
Further, valve seat of the present invention has the tissue comprising the silicide that cobalt (Co) and molybdenum (Mo) combine in tissue, the associativity raising therefore between tissue and excellent heat resistance.
At this, when considering wear resistance and the degree of injury to mating member valve of valve seat, the bainite structure existed in the tissue of valve seat of the present invention, is as the criterion with the total 100 volume % of valve seat, preferably accounts for 2 volume % ~ 12 volume %.Be specially, the volume of bainite structure can calculate according to following methods, and now, the ratio of the volume calculated shared by valve seat cumulative volume is 2 volume % ~ 12 volume %.
That is, arbitrary A in valve seat
1, A
2and A
3after each aspect cuts off valve seat along the direction perpendicular to ground, be determined at the area of the bainite structure that respective cross section finds.At this, the area of bainite structure measures by image analysis.Afterwards, according to the volume (V) calculating bainite structure with following formula.
V=(A
1area+the A that the cross section upper bainite tissue put accounts for
2area+the A that the cross section upper bainite tissue put accounts for
3the area that the cross section upper bainite tissue put accounts for) × π/3
With this, in the situation that degree in the tissue of valve seat shared by bainite structure is suitable for volume %, be preferably 2 volume % ~ 12 volume %, cut off in the situation that valve seat and the degree shared by the upper bainite tissue of cross section that obtain be suitable for area %, preferably 2% ~ 12%.
Meanwhile, valve seat of the present invention, in order to improve the associativity of tissue, also can comprise the copper (Cu) or copper alloy (such as, Cu-Zn, Cu-Co, Cu-Fe-Mn, Cu-Fe-Mn-Zn etc.) of organizing infiltration in inner air vent.At this, the copper (Cu) existed in valve seat tissue or copper alloy content are not particularly limited, but when considering valve seat processibility, with valve seat gross weight for benchmark, except the chemical constitution of valve seat of the present invention, the content of copper and copper alloy is preferably 1.0 % by weight ~ 25.0 % by weight.
In addition, in order to save cost, valve seat of the present invention also can be combined with iron system sinter.Namely, the part (part contacted with valve) be adjacent to valve face of valve seat of the present invention is made up of the composition of above-mentioned explanation and component, the Dual-Layer structure that the part (not having the part contacted with valve) be not adjacent to valve face can be made up of iron system sinter.Now, composition and the component of iron system sinter are not particularly limited, but with iron system sinter gross weight for benchmark, comprise carbon (C) 0.1 % by weight ~ 1.5 % by weight, copper (Cu) 0.1 % by weight ~ 25 % by weight, all the other are made up of iron (Fe) and impurity.
2, engine
The invention provides the engine comprising above-mentioned valve seat.This engine of the present invention does not have special standby restriction, can be gas engine or diesel motor.
Below, illustrate the present invention by embodiment, but following embodiment illustrate only a kind of form of the present invention, the scope of the invention is not limited to following embodiment.
The preparation of [embodiment 1 ~ 9] valve seat
Select each component powders to mix by powder metallurgic method and press by the shaping valve seat as Fig. 1 shape.Then, in sintering oven after sintering, each valve seat had as following table 1 component is prepared through post-treatment (thermal treatment).The valve seat be shaped in embodiment 6 ~ 9, when sintering, makes the process of copper (Cu) infiltration in addition.Meanwhile, the component of each valve seat of preparation is determined by icp ms.
Table 1
The preparation of [comparative example 1 ~ 11] valve seat
Be suitable for each valve seat that method that as above embodiment 1 is identical prepares the component had as following table 2.Now, comparative example 5 and 9, after being sintered by shaping valve seat, makes the process of lead (Pb) infiltration in addition, make the process of copper (Cu) infiltration when comparative example 6,8,10 and 11 is and is sintered by shaping valve seat in addition.Meanwhile, the component of each valve seat of preparation is determined by icp ms.
Table 2
[experimental example 1] valve seat cross-section analysis
After vertically being cut off by the valve seat of preparation in embodiment 1 (with reference to Fig. 2), polishing also uses observation by light microscope (using 200 multiplying powers) after etching, then result is presented at Fig. 3.
With reference to Fig. 3, coexist in the tissue that can confirm valve seat bainite structure, the tissue comprising the silicide being combined with cobalt (Co) and molybdenum (Mo), the martensitic stucture comprising chromium double carbide and austenite structure.
[experimental example 2] bainite structure ratio is evaluated
The A of each valve seat of preparation in embodiment 1 ~ 5 and comparative example 1 ~ 4
1, A
2, A
3point (with reference to Fig. 1) upper cut off valve seat along the direction perpendicular to ground after, use observation by light microscope cross section by Cross section polishing and after etching, determines the area of the bainite structure found on respective cross section.
Afterwards, according to the volume (V) in following formulae discovery valve seat shared by bainite structure, its result is presented on table 3.
V=(A
1area+the A shared by the upper bainite tissue of cross section of point
2area+the A shared by the upper bainite tissue of cross section of point
3the area shared by the upper bainite tissue of cross section of point) × π/3
Table 3
With reference to above-mentioned table 3, can confirm that valve seat of the present invention (embodiment 1 ~ 5) is as the criterion with whole valve seat 100 volume %, bainite structure accounts for 2 volume % ~ 12 volume %.
The evaluation of [experimental example 3] wear resistance and thermotolerance
The valve seat of preparation in embodiment 1 ~ 5 and comparative example 1 ~ 11 is useful in the bench testing of imitation air gate distribution system to evaluate wear resistance, by the display of its result in table 4.Experiment condition and the evaluation method of bench testing are as follows.
Cam speed of rotation: 1100rpm
The temperature of valve seat: 150 DEG C/300 DEG C
Test period: 20 hours
Evaluation method: after using shapometer to measure the shape of the contact surface that valve contacts with valve seat, the maximum abrasion degree of depth of analysis in shape measured
Table 4
With reference to above-mentioned table 4, the excellent in abrasion resistance of valve seat of the present invention (embodiment 1 ~ 9) can be confirmed.Further, even if temperature rises to 300 DEG C from 150 DEG C, can confirm that wear loss velocity of variation is also lower, this point can support valve seat excellent heat resistance of the present invention.
[experimental example 4] post-treatment is evaluated
When preparing the valve seat of embodiment 1,6 ~ 9, post-treatment is evaluated in the following manner, and its result is presented at Fig. 4.
Evaluation method: after being sintered by the valve seat be shaped, after measuring the degree of depth cut off by post-treatment, the depth of cut of embodiment 6 is set as 1 to calculate relative quantity.
With reference to Fig. 4, can confirm that embodiment 9 is compared with embodiment 1,6 ~ 8, along with the content of the copper (Cu) of infiltration uprises, cutting output during post-treatment can increase.Consider post-treatment, this point can support that the content of the copper (Cu) of infiltration is preferably more than 25 % by weight.
Claims (7)
1. a valve seat, it is characterized in that, this valve seat comprises: the carbon (C) of 0.8 % by weight ~ 1.7 % by weight, the silicon (Si) of 0.5 % by weight ~ 1.5 % by weight, the manganese (Mn) of 0.5 % by weight ~ 1.5 % by weight, the sulphur (S) of 0.01 % by weight ~ 1.0 % by weight, the chromium (Cr) of 2.0 % by weight ~ 6.0 % by weight, the molybdenum (Mo) of 7.0 % by weight ~ 16.0 % by weight, the nickel (Ni) of 2.0 % by weight ~ 8.0 % by weight, the tungsten (W) of 0.01 % by weight ~ 3.0 % by weight, the vanadium (V) of 0.01 % by weight ~ 1.0 % by weight, the cobalt (Co) of 14.0 % by weight ~ 25.0 % by weight and the iron (Fe) of surplus and impurity.
2. valve seat as claimed in claim 1, wherein, comprise in the tissue of described valve seat: bainite structure, the tissue comprising the silicide that cobalt (Co) and molybdenum (Mo) combine, the martensitic stucture comprising chromium double carbide and austenite structure.
3. valve seat as claimed in claim 1, wherein, with the total 100 volume % of valve seat for benchmark, bainite structure is 2 volume % ~ 12 volume %.
4. valve seat as claimed in claim 1, wherein, the area ratio on the cross section obtained cutting off valve seat shared by described bainite structure is 2% ~ 12% of section area.
5. valve seat as claimed in claim 1, wherein, in the in-house pore of described valve seat, infiltration has copper (Cu) or copper alloy.
6. valve seat as claimed in claim 1, wherein, described valve seat is also combined with iron system sinter.
7. an engine, is characterized in that, this engine comprises as the valve seat in claim 1 ~ 6 as described in any one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2014-0097222 | 2014-07-30 | ||
| KR1020140097222A KR102199856B1 (en) | 2014-07-30 | 2014-07-30 | A valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105316600A true CN105316600A (en) | 2016-02-10 |
| CN105316600B CN105316600B (en) | 2017-07-21 |
Family
ID=54010832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510454867.9A Active CN105316600B (en) | 2014-07-30 | 2015-07-29 | Valve seat |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2980234B1 (en) |
| KR (1) | KR102199856B1 (en) |
| CN (1) | CN105316600B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872671A (en) * | 2018-09-03 | 2020-03-10 | 柳成企业株式会社 | High-temperature wear-resistant iron-based sintered alloy and method for manufacturing valve seat using same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017102544A1 (en) | 2017-02-09 | 2018-08-09 | Man Diesel & Turbo Se | Valve seat ring of a gas exchange valve, gas exchange valve and method of manufacturing the valve seat ring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1497056A (en) * | 2002-10-02 | 2004-05-19 | 三菱麻铁里亚尔株式会社 | Production method of iron base sintered alloy valve seat |
| JP2004232088A (en) * | 2003-01-10 | 2004-08-19 | Nippon Piston Ring Co Ltd | Valve seat made of iron-based sintered alloy, and production method therefor |
| CN102046824A (en) * | 2008-03-31 | 2011-05-04 | 日本活塞环株式会社 | Iron-base sintered alloy for valve sheet and valve sheet for internal combustion engine |
| CN103361576A (en) * | 2012-04-02 | 2013-10-23 | 现代自动车株式会社 | Sintered alloy for valve seat and manufacturing method of exhaust valve seat using the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950014352B1 (en) | 1993-11-02 | 1995-11-25 | 대우중공업주식회사 | Process for making sintering alloy of valve sheet and article made thereby |
| JP3447030B2 (en) * | 1996-01-19 | 2003-09-16 | 日立粉末冶金株式会社 | Wear resistant sintered alloy and method for producing the same |
| JP2002285293A (en) * | 2001-03-27 | 2002-10-03 | Hitachi Powdered Metals Co Ltd | Valve seat material for high load engine and production method therefor |
| JP4213060B2 (en) * | 2004-03-03 | 2009-01-21 | 日本ピストンリング株式会社 | Ferrous sintered alloy material for valve seats |
| JP6305811B2 (en) * | 2014-03-31 | 2018-04-04 | 日本ピストンリング株式会社 | Ferrous sintered alloy material for valve seat and method for producing the same |
-
2014
- 2014-07-30 KR KR1020140097222A patent/KR102199856B1/en active IP Right Grant
-
2015
- 2015-07-29 CN CN201510454867.9A patent/CN105316600B/en active Active
- 2015-07-30 EP EP15179135.7A patent/EP2980234B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1497056A (en) * | 2002-10-02 | 2004-05-19 | 三菱麻铁里亚尔株式会社 | Production method of iron base sintered alloy valve seat |
| JP2004232088A (en) * | 2003-01-10 | 2004-08-19 | Nippon Piston Ring Co Ltd | Valve seat made of iron-based sintered alloy, and production method therefor |
| CN102046824A (en) * | 2008-03-31 | 2011-05-04 | 日本活塞环株式会社 | Iron-base sintered alloy for valve sheet and valve sheet for internal combustion engine |
| CN103361576A (en) * | 2012-04-02 | 2013-10-23 | 现代自动车株式会社 | Sintered alloy for valve seat and manufacturing method of exhaust valve seat using the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872671A (en) * | 2018-09-03 | 2020-03-10 | 柳成企业株式会社 | High-temperature wear-resistant iron-based sintered alloy and method for manufacturing valve seat using same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2980234A1 (en) | 2016-02-03 |
| CN105316600B (en) | 2017-07-21 |
| KR20160015449A (en) | 2016-02-15 |
| EP2980234B1 (en) | 2019-05-01 |
| KR102199856B1 (en) | 2021-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7241327B2 (en) | Iron-based sintered alloy with dispersed hard particles | |
| US8733313B2 (en) | Iron-based sintered alloy for valve seat, and valve seat for internal combustion engine | |
| CN104428436B (en) | Iron-base sintered alloy valve seat | |
| JP5887374B2 (en) | Ferrous sintered alloy valve seat | |
| CN105102776B (en) | Valve seat | |
| JP6142987B2 (en) | Iron-based sintered sliding member | |
| CN102994896A (en) | Sintered alloy and manufacturing method thereof | |
| KR101607744B1 (en) | Iron base sintered alloy for sliding member and method for manufacturing the same | |
| JP6112473B2 (en) | Iron-based sintered sliding member | |
| CN103361576A (en) | Sintered alloy for valve seat and manufacturing method of exhaust valve seat using the same | |
| US10837087B2 (en) | Copper infiltrated molybdenum and/or tungsten base powder metal alloy for superior thermal conductivity | |
| WO2009024809A1 (en) | A valve seat insert and its method of production | |
| CN104745956A (en) | Metallic material for manufacturing valve-seat ring and preparation method of metallic material | |
| US9976202B2 (en) | Hard particles for incorporation in sintered alloy and wear-resistant iron-based sintered alloy and production method thereof | |
| WO2012140057A1 (en) | A powder metallurgical composition and sintered component | |
| CN105316600A (en) | Valve seat | |
| CN104073723A (en) | Powder metallurgy material for manufacturing high-density part and processing technology thereof | |
| KR20020028913A (en) | Sintered steel material | |
| EP3276034A1 (en) | Heat-resistant sintered material having excellent oxidation resistance, wear resistance at high temperatures and salt damage resistance, and method for producing same | |
| JP6341455B2 (en) | Manufacturing method of iron-based sintered sliding member | |
| JPH0841607A (en) | Heat resistant and wear resistant sintered stainless steel | |
| KR101199433B1 (en) | Sintered alloy for valve seat having wear resistance and self-lubricating property | |
| JP4516697B2 (en) | Hard particle dispersion type iron-based sintered alloy | |
| JP7165696B2 (en) | Use of iron-based prealloy powder for powder metallurgy as raw material powder for manufacturing sintered and forged members, diffusion bonding powder for powder metallurgy, iron-based alloy powder for powder metallurgy, and method for manufacturing sintered and forged members | |
| JP2017137580A (en) | Manufacturing method of iron-based sintered slide member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Inchon, South Korea Patentee after: Hyundai Yingweigao Co.,Ltd. Address before: Inchon, South Korea Patentee before: DOOSAN INFRACORE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |