Taw qhia: Ib xyoo caum ntawm Kev Txiav Txim Hnav Tsis Txaus los ntawm Symphony ntawm Thermal Energy thiab Kinetic Energy
Ntawm V-zoo li tus txiav nto ntawm lub pob valve, txheej txheej nrog tuab ntawm 200 micrometers tsuas yog ua haujlwm nrog kev tiv thaiv kev yaig tsis tu ncua rau ntau xyoo lossis ntau tshaj kaum xyoo. Qhov kev ua tau zoo ntawm no "micro armor" ncaj qha nyob ntawm txoj kev nws tsim - thaum lub sij hawm cov txheej txheem txau, txhua cov hmoov particle yog muab ib qho kub, ceev, thiab lub xeev. Ntawm ntau cov txheej txheem saum npoo engineering,supersonic nplaim txau (HVOF)thiabatmospheric plasma txau (APS)zoo li ob qhov sib txawv "micro forging masters", shaping lub ntiaj teb txheej nrog cov ntsiab lus sib txawv ntawm lub cev.
Kev xaiv tsis ncaj ncees lawm tsis yog txhais tau hais tias cov txheej txheem yuav ua tsis tiav ntxov, tab sis kuj tuaj yeem ua rau cov txheej txheej tev tawm hauv qhov kub thiab txias sib txawv, ua rau muaj kev puas tsuaj loj rau theem nrab hnav. Tongball ntseeg hais tias kev nkag siab qhov sib txawv ntawm qhov tseem ceeb ntawm ob lub thev naus laus zis no tsis yog lub ntsiab lus tshwj xeeb rau cov txheej txheem engineers, tab sis nws yog ib qho kev paub tseem ceeb hauv paus ntsiab lus rau txhua qhov kev txiav txim siab - tus neeg tsim khoom siv sij hawm ntev - lub sij hawm txhim khu kev lag luam ntawm li qub,ua kev xaiv scientific.
Kev Ntsuam Xyuas Kev Ntsuas: Kinetic Dominance vs. Thermal Supremacy - Lub cev qhov tseem ceeb thiab kev ua tau zoo ntawm ob txheej txheem
Qhov sib txawv tseem ceeb ntawm HVOF thiab APS yog nyob rau hauv txoj kev lub zog hloov mus rau cov hmoov nplej thiab cov txiaj ntsig ntawm lub xeev, uas ncaj qha txiav txim siab qhov kawg ntawm cov txheej txheem.
1. Supersonic Flame Spraying (HVOF): Cov txheej txheem "txias txias" uas tau tsav los ntawm lub zog kinetic
Txoj haujlwm ua haujlwm:Roj (kerosene, hydrogen, thiab lwm yam) yog combusted nyob rau hauv lub combustion chamber, tsim high- siab gas, uas yog ceev mus rausupersonic ceev (feem ntau> 1500 m / s)los ntawm ib tug ram nozzle. Cov hmoov yog txhaj rau hauv qhov siab no - roj ntws nrawm, tau nrawm thiab ua kom sov rau ib nrab -molten lossis yas lub xeev, nrog lub zog kinetic siab heev cuam tshuam rau lub substrate.
Cov yam ntxwv tseem ceeb: "Kev kub ceev, kuj tsis tshua muaj kub". Qhov ntsuas kub feem ntau tsuas yog me ntsis siab dua nws cov ntsiab lus melting, tab sis qhov ceev yog qhov siab heev.
Coating kev ua tau zoo zoo:
Ultra- ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom:Cov yas khaus deformation tshwm sim los ntawm qhov siab - nrawm particle cuam tshuam zoo li "forging", nias cov khoom ua ke,nrog rau txheej porosity qis dua 1%thiab lub zog sib txuas feem ntau tshaj 70 MPa.
Ultra{0}}siab hardness thiab hnav tsis kam:Vim tias cov cua kub tsis tshua muaj hluav taws xob, qhov decomposition thiab oxidation ntawm cov theem nyuaj xws li tungsten carbide thaum lub sij hawm lub davhlau txheej txheem raug zam, tso cai rau qhov siab tshaj plaws tuav ntawm cov hmoov qub hardness. Lub hardness ntawm WC-Coatingyooj yim mus txog saum HV1200.
Tsawg oxidation thiab tsis tshua muaj kev ntxhov siab:Qhov ntsuas kub qis dua txo cov oxidation, thiab cov txheej txheej tsim feem ntau yog nyob rau hauv kev ntxhov siab, uas yog qhov zoo rau kev npaj cov txheej tuab.
Kev txwv:Tsawg melting peev xwm rau siab melting point ceramic cov ntaub ntawv (xws li alumina, zirconia); txheej txheej yog qhov ntxhib, thiab feem ntau yuav tsum tau sib tsoo thiab polishing tom qab.
2. Atmospheric Plasma Spraying (APS): Cov txheej txheem "melted deposition" uas tau tsav los ntawm lub zog cua sov
Txoj haujlwm ua haujlwm:Nyob rau hauv rab phom, ib qho hluav taws xob arc ionizes cov roj ua haujlwm (xws li argon, nitrogen, hydrogen) los uaib plasma jet tshaj 10,000 degree.Cov hmoov yog xa mus rau hauv nruab nrab ntawm lub dav hlau thiab yog tam sim ntawd rhuab mus rau ib tug tag nrho molten lub xeev, thiab ces sprayed ntawm ib tug ceev ceev (kwv yees li 200-400 m / s) ntawm lub substrate, flattened thiab sai sai solidifying los tsim ib txheej.
Cov yam ntxwv tseem ceeb: "High kub, kuj qis ceev".Nws muaj lub peev xwm kub siab tshaj plaws kom yaj yuav luag tag nrho cov ntaub ntawv.
Coating kev ua tau zoo zoo:
Khoom siv versatility:Yuav tau txau rau yuav luag tag nrhohlau, alloys, ceramics thiab cov ntaub ntawv sib xyaw,tshwj xeeb tshaj yog zoo ntawm kev npaj oxide ceramic coatings (xws li Al2O3, Cr2O3, YSZ).
Zoo heev tshuaj stability thiab corrosion kuj:Cov txheej txheem ceramic txheej muaj cov qauv zoo ib yam thiab muaj zog tshuaj lom neeg tsis muaj zog, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev cuam tshuam cov tshuaj corrosion, siab -kub oxidation thiab rwb thaiv tsev yuav tsum tau.
Txheej txheem controllability:Los ntawm kev kho qhov tsis zoo, muaj qee yam ntawm cov porosity tuaj yeem tau txais, uas tuaj yeem siv los npaj cov txheej txheem thermal barrier coatings lossis hnav- cov txheej tiv thaiv uas yuav tsum tau khaws cov pore.
Kev txwv:Cov txheej yuav muajntau oxide inclusions thiab microscopic pores(feem ntau tshaj 2-5%); Lub zog sib txuas feem ntau qis dua HVOF; cov khoom siv hluav taws xob tsis tshua muaj siab tuaj yeem muaj kev cuam tshuam thermal ntawm lub pob valve substrate thiab ua rau muaj kev ntxhov siab loj dua hauv txheej txheej.
3. Kev Xaiv Qhov Kev Txiav Txim Matrix: Qhov "Qhov Zoo Tshaj Plaws" Raws li kev ua haujlwm
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Kev ntsuas qhov ntev |
Nyiam siab -Speed Flame spraying (HVOF) |
Nyiam atmospheric plasma spraying (APS) |
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Main tsis ua hauj lwm hom |
Abrasive hnav, yaig hnav (xws li thee slurry, ore, catalyst) |
Corrosion, oxidation, siab -kub hnav, Fretting Wear |
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Core txheej cov ntaub ntawv |
Tungsten Carbide (WC), carbide chromium (Cr3C2) thiab lwm yam hlau carbides |
Alumina, chromium oxide, zirconia thiab lwm yam ceramics |
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Ua haujlwm kub |
Nruab nrab- qis mus rau nruab nrab- siab (< 800°C |
Ultra-high (>800 degree, xws li lub hauv paus txheej ntawm thermal barrier txheej) |
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Bonding zog xav tau |
Tsis tshua muaj siab, muaj peev xwm tiv taus siab sib txawv thiab cuam tshuam |
Siab dua, tab sis qhov hnyav ntawm cov tshuaj tiv thaiv kev ua tau zoo dua |
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Cov txheej txheem txheej ceev |
Qhov kawg ntom ntom nti, caum zero nkag mus |
Tso cai tswj porosity, hais txog tshuaj tiv thaiv kab mob |
Raws li kev paub ntau xyoo ntawm kev hloov kho rau kev ua haujlwm, TongBall tau ua ke qhov kev txiav txim siab no nrog cov ntaub ntawv tseeb los tsim cov txheej txheem kev qhia kev xaiv, ua kom yooj yim rau kev sib koom ua ke sai thiab meej.
Cov ntaub ntawv pov thawj: txawvCov txheej txheem tshuaj tsuag ua rau muaj kev ua haujlwm sib txawv hauv kev ua haujlwm zoo ib yam
Coal hmoov conveying regulating valve nyob rau hauv ib tug loj thermal fais fab nroj tsuag, lub pob valve yuav tsum tau ua hauj lwm nyob rau hauv ib tug siab -ceev thee hmoov roj ntws uas muaj siab - hardness silicate hais. Thawj txoj kev npaj yog sivplasma sprayed chromium oxide txheej, mastxheej txheej ua tsis tau zoo heev vim hnav hnyav ntawm qhov nruab nrab txhua6 hli.
Kev kuaj mob thiab cov txheej txheem sib piv kev txheeb xyuas:
Kev soj ntsuam tsis tiav:TongBall technical team soj ntsuam tau qhia tias cov txheej txheej tau npog nrogclear cutting furrows,thiab qee qhov chaw ntawm txheej txheej tau tawm hauv cov nplooj ntawv los ntawm kev sib tshuam. Kev tsom xam qhia tias qhov laj thawj tseem ceeb ntawm kev ua tsis tiav yog qhov tsis txaus hardness ntawmAPS chromium oxide txheej thiab tsis muaj zog sib txuas nrog lub substrate,tsis tuaj yeem tiv thaiv microscopic txiav ntawm cov khoom tawv.
Scheme sib piv xeem:
TongBall tau ua peb lub pob valve: Qauv A txuas ntxiv cov txheej txheem APS chromium oxide qub; Qauv B sivHVOF tungsten carbidetxheej; QauvC sivHVOF chromium carbide txheej.
Kev sib piv 100-teev nrawm nrawm tau ua ntawm TongBall lub simulated kev khiav hauj lwm tej yam kev mob yaig kuaj tshuab.
Cov ntaub ntawv tshwm sim:
Qauv A (APS): Covtxheej poob hnyav hnyav, nrog rau hnav tus nqi ntawm15 mg/kg.
Qauv B (HVOF-WC): Uakev ua tau zoo yog qhov zoo tshaj plaws, nrog kev hnav tus nqi nkaus xwb1.2 mg/kg, covtxheej txheej yog du, thiab tsuas yog me ntsis polished.
StxausC (HVOF-Cr3C2):Tus nqi hnav yog2.5 mg / kg, uas yog txawm zoo dua li ntawm tus qauv A.
Daim ntawv thov teb thiab cov txiaj ntsig ntev -:Tom qab lub chaw nres tsheb fais fab tau txais kev pom zooHVOF tungsten carbide coated valve pob tau pom zoo los ntawm TongBall, nws lub neej kev pabcuam tau txuas mus rau ntau dua 36 lub hlis. Rau ib lub valve, kev txuag nyiaj txhua xyoo hauv cov nqi tu thiab kev poob qis mus txog ntau pua txhiab yuan. Cov ntaub ntawv sib piv no tau dhau los ua tus qauv xaiv rau cov txheej txheem txau ntawm pawg fais fab no for li qub nrog siab wearability rau qhuav hmoov xov xwm.
Kev txhim kho tus nqi: Tshaj li kev sib cav txog cov txheej txheem, tsom mus rau qhov tseem ceeb ntawm kev sib txuam ntawm "kev ua tsis tiav"
Thaum xaiv cov txheej txheem tshuaj tsuag, tau txais kev sib cav txog qhov yooj yim "kev tshaj lij" kev sib cav yog ib qho -sab. Qhov tseeb kev txawj ntse nyob rau hauv:
Los ntawm "muag txheej" mus rau "muag kev daws teeb meem": Tus nqi ntawm Tongball nyob rau hauv basingkev nkag siab tob rau koj qhov kev ua tsis tiav physics,pom zoo los yog kho qhov zoo tshaj plaws "khoom- txheej txheem" ua ke, tsis yog muab cov txheej txheem txheej txheem zaub mov.
Optimization ntawm tag nrho lub neej voj voog tus nqi:Qhov sib txawv ntawm cov nqi pib ua haujlwm, nyob rau hauv lub ntsej muag ntawm ntau lossis ob peb -fold qhov sib txawv hauv kev pabcuam lub neej, yog qhov tsis tseem ceeb. Qhov kev xaiv raug ncaj qha ua rauib tug structural txo nyob rau hauv tag nrho cov nqi xws li raws li cov khoom seem, cov neeg ua haujlwm, thiab kev pheej hmoo poob qis.
Kev tiv thaiv kev pheej hmoo ua ntej:Kev txheeb xyuas kev tshawb fawb-raws li kev xaiv cov txheej txheem tuaj yeem tshem tawm qhov muaj peev xwm, tsis muaj kev pheej hmoo nyob rau lub sijhawm pib ntawm cov saw hlau.
TongBall yeej ib txwm ua raws li kev ntseeg tias kev xaiv txheej txheej txheej txheem yeej tsis muaj kev sib tw, tab sis yog kev sib raug zoo nrog cov ntsiab lus ntawm kev ua haujlwm thiab cov qauv tsis ua haujlwm. Qhov no yog qhov tseem ceeb ua ntej kom ua tiav kev ntseeg siab ntev - lub sijhawm ua haujlwm ntawm li qub.
Hu rau kev nqis tes ua: Cia qhov kev xaiv txheej tom ntej pib nrog kev kuaj mob
Puas yog koj tsis txaus siab rau lub neej txheej ntawm koj li qub? Puas yog koj tsis meej pem los ntawm kev xaiv txheej txheej txheej txheem txheej txheem hauv kev npaj ua haujlwm tshiab?
Cia Tongball los ua koj cov txheej txheem thev naus laus zis "tus kws tshaj lij".
Muab koj qhov nruab nrab muaj pes tsawg leeg, hnav daim ntawv thiab kev ua haujlwm tsis zoo, thiabTongBallyuav muab:
Daim ntawv qhia kev sib piv ntawm txheej txheem txheej thiab xaiv cov khoom raws li kev soj ntsuam tsis ua haujlwm
Cov ntaub ntawv tseem ceeb ntawm kev sib piv ntawm HVOF thiab APS cov qauv ua qauv (xws li lub zog, hardness, porosity, thiab lwm yam)
Customized composite txheej txheej txheej txheem tsim rau koj cov kev ua haujlwm
Cia peb ua haujlwm ua ke, nrog rau kev xaiv cov txheej txheem tshawb fawb, nteg lub hauv paus ruaj khov thiab kav ntev rau kev hnav ntawm koj li qub.
