Dab tsi yog hnav tsis kam?
Hnav tsis kam piav qhia txog cov ntaub ntawv muaj peev xwm tiv thaiv cov npoo av uas tsis muaj kev phom sij thaum muaj kev sib txhuam, lossis zawv zawg kev sib cuag. Cov cuab yeej no txiav txim siab ntev npaum li cas cov khoom siv tau ua lawv txoj kev raug thiab kev ua haujlwm zoo nyob hauv kev ua haujlwm.
Nkag siab txog cov tsav tsheb
Cov khoom siv tsis txaus siab tshwm sim los ntawm plaub thawj lub tshuab, txhua qhov xav kom sib txawv cov tswv yim sib txawv.
Adhesive hnav
Thaum cov chaw hu rau hauv siab, microscopic high poins fuse ua ke ntawm qib molecular. Raws li cov chaw txav chaw txav, cov khoom sib hloov ntawm ib mus rau lwm tus, tsim cov khib nyiab hnav. Qhov kev siv tshuab no ua kom muaj zog sib npaug thaum mating cov chaw sib qhia sib xws medurgical lub zog- Cov ntaub ntawv zoo ib yam li cov nplaum sib txuas dua.
Qhov loj heev nyob ntawm kev tiv tauj siab thiab sib xyaw ua ke. Cheebtsam ntawm cov khoom siv nyuaj sib xws ua kom nrawm dua cov khoom nplaum kom nrawm dua li nyuaj {1} {cov ntaub ntawv muag ua ke.
Abrasive hnav
Cov khoom siv nyuaj lossis cov nplaim taws txiav ua cov khoom softer, tshem cov khoom los ntawm kev plowing lossis txiav cov kev txiav txim. Qhov no sawv cev rau kev siv cov kev tsav tsheb ntau tshaj plaws, cov nyiaj txiag rau cov khoom siv tsis tseem ceeb hauv kev txiav tawm, kev tsim kho, thiab khoom siv tes ua haujlwm.
Lub thoob ntiaj teb hnav - Tus nqi tiv thaiv steel, muaj nuj nqis ntawm $ 12,4, cov phiaj xwm kev loj hlob rau $ 1233, tsav feem ntau ntawm kev lag luam ua rau muaj kev lag luam. Sab saum toj hardness ncaj qha cuam tshuam abrasive hnav Kuj -}}}}}} Cov ntaub ntawv nrog hardive yuam kev tawm tsam cov neeg muaj kev nkag siab ntau dua.
Corrosive hnav
Tshuaj lom neeg tsis muaj zog tiv thaiv cov txheej ntawm cov khoom siv kho tshuab thaum cov khoom siv tshuab hluav taws xob tshem cov khoom siv corroded, ua rau cov hlau tshiab los ua kom tsis zoo txuas ntxiv. Qhov txheej txheem synergistic no accelerates cov khoom ploj dhau qhov mechanism yuav tsim tau ywj pheej.
Corrosive hnav feem ntau tshwm sim nyob rau hauv cov khoom siv tuav dej slurries thaum lub sijhawm ua haujlwm thiab ore ua, qhov twg ob qho chaw tshuaj lom neeg muaj feem cuam tshuam. Kev xaiv cov khoom yuav tsum tau nyob ntawm kev ua kom haum corrosion thiab tshuab siv hluav taws xob.
Nto qaug zog
Rov ua cov chaw thau khoom cycles tsim cov kev ua kom tiav cov kev ntxhov siab uas nucileate microcracks. Cov kab nrib pleb no hais tawm mus rau saum npoo, ua rau cov khoom spalling thiab pitting. Tsis zoo li cov ris kev hnav tas mus li cas, nkees hnav ua manifests tom qab tsim kev thauj khoom mus.
Ob lub hardness thiab kev cuam tshuam cuam tshuam rau cov khoom ua kom qaug zog, nrog cov ntaub ntawv muag muag zoo li txhuas qhia tau ntau dua li cam khwb cia hlau lossis hlau. Cheebtsam muaj kev paub cyclic tiv tauj - bearings, zog, rolling chaw nyuaj nrog pob txha tawv tawv.
Cov Khoom Siv Khoom Siv Muaj Kis Muaj Nqis Hnav
Kwv yees hnav yuav tsum tau kev ua tiav yuav tsum nkag siab tias muaj ntau cov khoom siv cuam tshuam nrog cov kev pabcuam.
Hardness thiab Microstructure
Hardness muab cov tiv thaiv tseem ceeb tawm tsam cov kev nkag mus txawv teb chaws, tab sis kev ua kom pom kev zoo yuav tsum muaj ntau tshaj li lub ncov siab tawv. Microstructure cuam tshuam kev ua tau zoo {{1} ingloy oms uas sib txawv ntawm matrix atomouriser discourage txav dislourage expourage kev tshem tawm, txhim kho ob lub zog thiab hnav tsis kam.
Cov tswv yim kho cua sov tuaj yeem tsim kho cov microstructures zoo rau kev hnav ib puag ncig. Martensitic structures offer high hardness, while dual-phase microstructures balance hardness with toughness for impact-abrasion conditions.
Tougness thiab kev cuam tshuam tsis kam
Cov khoom siv tuaj yeem hnav - tiv taus thiab tawv yam tsis muaj kev nyuaj tshwj xeeb, tsuas yog cov ntaub ntawv nyuaj yuav tsis muaj zog. Toughness - Lub peev xwm los nqus lub zog ywj thiab tawg yooj yim {}
Txiav txim siab cov log tsheb hluav taws xob: Cov roj hmab mos uas ua rau cov roj hmab uas muag tshwj xeeb ntawm cov pob zeb nyuaj thiab kev tawm tsam ywj pheej. Cov khoom muaj cai nyob rau hauv load tab sis rov qab los ua qauv, faib cov hnav hnav lub neej pabcuam txuas ntxiv.
Kev Tawm Tsam Kev thiab Lubricity
Qee cov ntaub ntawv muaj tau txais tus kheej selfent - roj nplua cov khoom uas txo tus txheej txheem sib txhuam thiab hnav yam tsis muaj lubricavants sab nraud. Cov ntaub ntawv xws li phosphor bronze ib txwm txo cov kua nplaum siab, ua rau lawv muaj txiaj ntsig rau kev siv tsis muaj cai.
Kev ua kom tsis zoo tseem txiav txim siab corrosion tsis kam nyob rau hauv kev ua kom muaj siab. Cov roj chromium thiab npib tsib xee tiv thaiv oxide txheej uas tiv thaiv kev tawm tsam tshuaj, tseem ceeb rau cov khoom siv hauv marine lossis cov tshuaj lom neeg.
Hlau Txhaj Moldingthiab hnav tsis kam
Hlau txhaj MOLDING (MIM) qhov Excel nyob rau hauv cov kev coj tawm tsam tsim cov khoom siv ib txwm tsim thoob plaws cov kev coj ua tsis kam hla txhua qhov chaw.
Mim Txheej Txheem Zoo
Cov txheej txheem MIM ua rau ze - net {{}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Cov khoom siv cov khoom siv tau wrought. Sintering hlau hmoov ntawm kev tswj cov kub ua rau cov tuab, homogeneous microstration yam tsis muaj kev sib xyaw ua ke pom hauv kev ua yeeb yam lossis machining txheej txheem.
Qhov kev sib txuam no txhais ncaj qha rau kev twv xyuas kev ua tau zoo. Tsoos kev tsim khoom tuaj yeem tsim cov kev hloov hauv zos hauv lub hardness lossis microstructure uas tsim cov aav lom zem. Mim cov khoom siv sib xws xws li faib cov ntsiab lus uas tsis muaj zog.
Cov Khoom Siv Rau Hnav Daim Ntawv Thov
Mim - 420 stainless hlau ua tau hardness ntawm 52}}}}}} ceev hlau-on-hlau sib cuag hlau-on-hlau sib cuag hlau-rau-hlau sib cuag hlau-rau-hlau sib cuag hlau-rau-hlau sib cuag hlau. Qhov Martensic qib ua ke ua ke siab ua ke nrog kev ua kom haum corrosion tsis kam, haum rau cov ntawv thov uas yuav tsum tau siv cov khoom siv ob yam.
Tsawg -}} alloy ineloys alleoy hauv MIMO ALTOY ALLOY thaum muab cov hluav taws xob zoo dua, cov phom, thiab cov khoom siv hluav taws xob. Cuab Yeej Cuab Yeej Cuab Yeej Siv los ntawm Mim qhia kev tawv heev rau kev txiav cov cuab yeej thiab cov pwm, txawm tias brittly txwv cov ntawv thov.
Kev ua tau zoo hauv kev thov cov ntawv thov
MIM seem nrog Hardness Ntau tshaj 60 hrc txhim kho kom ruaj khov nyob rau hauv cav tseem ceeb siv tsheb cav, txo cov zaus. Lub peev xwm los tsim cov geometries thaum tswj cov khoom coj - Cov khoom tiv thaiv qhib tsis muaj kev tsim cov khoom lag luam.
Cov khoom siv precision rau cov tshuab cov txiaj ntsig tshwj xeeb yog los ntawm MIM kev sib xyaw ntawm cov khoom raug thiab kev ua tau zoo. Bushings, me me zog, thiab cov kabmob sib kis tau ua tiav kev zam nruj thaum xa cov ris tsho tiv thaiv lossis ntau tshaj qhov chaw ua haujlwm tsim khoom lag luam.
Kev lag luam -} Tshwj xeeb hnav cov kev sib tw
Txawv cov haujlwm sib txawv lub ntsej muag sib txawv hnav lub chaw ib puag ncig uas xav tau cov khoom siv ua kom haum.
Tsuas thiab kev ua tiav
Cov cuab yeej siv tuav pob zeb, ore, thiab cov ntxhia cov zaub mov hnav zoo nkauj. High {{{1} Kev xaiv ib puag ncig siab yuav ua rau cov khoom sib xyaw nyuaj tab sis tawg ua ke nrog cov khoom lag luam ceramic tau suav nrog cov enloys enloys tsim los daws cov khoom siv cuam tshuam.
Kev xaiv cov khoom yuav tsum xav txog ob qho tib si me me hardness thiab cuam tshuam zaus. Manganese steels ua hauj lwm - Harden nyob rau hauv kev cuam tshuam, txhim kho ntau zog los ntawm kev pabcuam. High -} Cov hlau carbon hlau thiab nrum Iron muab cov kev daws teeb meem.
Lub Zog Loj
Cavitation kev puas tsuaj tshwm sim nyob rau hauv high - Cov ntaub ntawv ceev thiab cov khoom siv hluav taws xob sib tsoo ua rau muaj kev poob siab tshaj 60,000 psi. Qhov kev puas tsuaj no kev puas hlwb yuav tsum muaj cov tswv yim sib txawv dua li swb lossis kev hnav.
Cobalt - Raws alloys muaj kev tawm tsam zoo dua rau cavitation thiab siab}} kub oxidation, txawm hais tias ntawm tus nqi hwm. Cov khoom siv xaiv cov khoom xaiv kev ua tau zoo kev ua tau zoo kev xav tau kev xav tau cov kev txwv tsis pub muaj nyiaj txiag.
Automotive thiab Tsheb Thauj Mus Los
Cov Cheebtsam Ua kom muaj kev sib txuas ua ke ntawm swb kev hnav, dov hu rau kev nkees, thiab kev xeb ib puag ncig. Cov Cav Tawg ntsej muag thermal cycling, abrasive ncoo cov ntaub ntawv, thiab cov ntsev muaj xeb. Kis lub zog yuav tsum muaj saum npoo hardness rau hnav tsis kam thaum tswj hwm cov tub ntxhais ua rau kev poob siab.
Cov kev kho saum npoo xws li carburizing lossis nitriving tsim cov khaubncaws sab nraud povtseg tawv ntau dhau ntawm cov pob zeb uas muaj kev ntxhov siab.
Cov Khoom Siv Kho Mob
Kev tsim kho cov tshuab uas siv cov khoom sib txhuam uas tsis muaj kev sib txhuam ntawm cov kab lis kev cai thiab kev sib txhuam tsis zoo.
Biocompatsibility yuav tsum muaj cov khoom siv txwv tsis pub siv, xav kom ceev faj thaj chaw ua tiav thiab kev sim. Cobalt - chrome alloys thiab tshwj xeeb stainless hlau dominate orthopedic kev cog lus, ntsuas cov ris kev tiv thaiv nrog kev siv roj ntsha.
Hnav Kuaj thiab Kev Ntsuas
Txawm tias cov qoj ib ce yuav tsum tau ua qauv ntsuas uas simulates kev pabcuam thaum muab cov txiaj ntsig tau zoo thaum muab cov txiaj ntsig tau.
Cov Qauv Ntsuas Cov Qauv
ASTM Committee G-2 Tsim cov qauv kev sim, nrog kev tshuaj xyuas txhua qhov kev ntsuas txuas ntxiv 5-xyoo thiab hloov kho lossis kho tshiab raws li qhov xav tau. Cov kev sib xws suav nrog:
Pin - -} disc sim (astm g-99): Ib qho chaw nyob ruaj ruaj PIN hu rau ib qho kev sib hloov discing hauv qab tswj kev thauj khoom thiab nrawm. Hnav tus nqi ntsuas siv kev ntsuas lub cev yuag lossis ntsuas profile profile ntsuas tom qab lub voj voog teev tseg. Qhov no yooj yim geometry ua rau sib piv thoob cov ntaub ntawv.
Qhuav xuab zeb / Roj Hmab Log (Astm G-65): Txheeb kev ua kom muaj kev txwv tsis pub coj los ntawm kev yuam cov xuab zeb ntawm lub log roj hmab log thiab kuaj cov hnoos qeev. Cov qauv no tshwj xeeb hais txog abrasive hnav, cuam tshuam rau cov khoom siv mining thiab cov av hauv av.
Taber Abraser (Astm D4060): Kev ntsuas cov txheej txheej thiab cov khoom siv organic los ntawm kev sib hloov cov qauv tawm tsam cov log tsis muaj log. Lub cev yuag lossis txheej tuab tuab txo tau qhia tias coj kev coj tsis taus.
Txhais lus ntsuam xyuas
Cov Ntsiab Lus Xeem Ntawv muab cov qeb sib piv hauv cov xwm txheej tshwj xeeb tsis yog hnav ris tsho lub neej. Rov ua cov kev sib tw sib txawv ntawm cov kev sim ntawm kev sim ua lub instrumental thiab ntsuas kev ua pov thawj qhov tseem ceeb ua ntej kev pom zoo.
Kev txhais lus ua kom muaj kev ua haujlwm kom muaj kev nkag siab yuav tsum nkag siab seb kev sim ua raws li kev pabcuam tiag tiag. Chaw thau khoom, nrawm, ntsuas kub, thiab paug taus txhua yam cuam tshuam rau cov nqi. Ntau txoj kev ntsuas feem ntau muab twv ua ntej zoo dua ib qho kev sim.
Txhim Kho Cov Hnav Kuj
Ntau cov tswv yim txhim kho cov hnav ua haujlwm, feem ntau siv ua ke rau kev ua tau zoo.
Cov Khoom Siv Xaiv Cov Qauv Xaiv
Matching cov khoom siv los hnav cov tshuab muab lub hauv paus. Rau cov abrasive ib puag ncig, ua ntej hardness; Rau zawv zawg kev sib cuag, xav txog lubricity; Rau kev cuam tshuam cov xwm txheej, qhia txog kev muaj zog.
Rau qhov tsis zoo hnav tsis kam, siab- Cov khoom siv roj av lossis cov khoom nplaum kos duab los ntawm cov ntaub ntawv muaj lubricity siab zoo li Phosphor Bronze. Corrosive ib puag ncig xav tau cov khoom siv tsis kam tiv tsi-}}} alloys es tsis txhob cia siab rau cov tsho tiv no ib leeg.
Cov kev kho saum npoo thiab txheej
Kev hloov kho deg ua qauv tsim kom zoo saum npoo yam tsis muaj cov khoom hloov cov khoom siv. Cov xwm txheej tawv tawv - carburizing, nitring, lossis induction nyuaj sab txheej dhau ntawm cov tawv nqaij tawv.
Advanced Txheej Technologies zoo li laser cladding, thermal txau, thiab electroplating cov tooj liab thiab tooj liab alloys, nthuav lawv daim ntawv thov lub zog dhau kev txwv cov kev txwv ib txwm muaj. Kev xaiv txheej nyob ntawm cov txheej txheem sib xyaw ua ke, kev ua haujlwm kub, thiab xav tau txheej txheej tuab.
Tsim Txhim Kho Kom Zoo
Feem ntau cov khoom sib xyaw ua si hnav cov kev faib tawm. Cov npoo sib npaug txo cov kev ntxhov siab; Kev tshem tawm kom tsim nyog siv tsawg qha antrapment entrapment; Nto ua tiav zoo cuam tshuam cov kev coj hnav pib thaum lub sijhawm tawg- hauv.
Engineering plastics ua tiav qis coefficient of sib txhuam ib txwm nyob hauv qab 0.2, kom muaj kev ua haujlwm du thiab ntseeg tau ntau dua li lub sijhawm ntev. Cov kev xaiv tsim xaiv xws li xaiv cov ntaub ntawv polymer tshem tawm cov khoom siv roj teeb thaum muab kev coj kom tsim nyog.
Kev cuam tshuam nyiaj txiag thiab kev tsim kho
Abrasive hnav ib leeg raug nqi 1-4% ntawm cov khoom lag luam tas nrho cov khoom lag luam hauv cov haiv neeg lag luam, sawv cev kev lag luam loj heev. Feem tivthaiv tsis ua haujlwm los ntawm kev hnav ua rau kev siv sijhawm ntau lawm, hloov tus nqi, thiab theem kev puas tsuaj rau cov khoom sib txuas lus.
Kev Loj Hlob Loj Hlob
Lub thoob ntiaj teb hnav - Cov ntaub ntawv lag luam resistant, muaj nuj nqis nyob rau hauv 2024, cov phiaj xwm muaj kev loj hlob ntawm 7,5}
Tsis ntev los no kev lag luam kev lag luam muaj kev pom zoo lub sijhawm tsim kho tshiab
Kev Tshaj Tawm Tshuab
Kev tshawb nrhiav yav tom ntej pom zoo rau saum npoo ntxiv cov tswv yim zoo dua rau cov txheej txheem ua ntej -}}}} kev kho cov txheej txheem kom txhim kho tag nrho cov kev ua tau zoo tag nrho. Ntxiv cov khoom lag luam ua rau cov qhab nia sib xyaw thiab cov nyom hauv cov geometries tsis yooj yim los ntawm kev ua pa.
Nanostructured cov ntaub ntawv qhia txog kev cog lus rau qhov tshwj xeeb hnav tsis kam tawm los ntawm kev kho micrtructures. Cov ntaub ntawv sib xyaw ua ke sib txuas nyuaj theem hauv cov matrices nyuaj ua kom hloov kho ntau yam ib txhij.
Cov Lus Nquag Nug
Ua li cas lub hardness cuam tshuam nrog kev coj tsis kam?
Hardness muab qhov tseem ceeb ntawm kev hnav tsis kam tab sis tsis yog tus pom tseeb xwb. Cov khoom siv yuav tsum tiv thaiv kev nkag mus los ntawm cov khoom muaj abrasive lossis cov chaw tawm tsam, ua rau tawv tawv muaj txiaj ntsig rau kev hnav zoo rau abrasive. Txawm li cas los xij, ntau hardness yam tsis muaj kev nyuaj ua rau binitt tsis ua tiav nyob rau hauv kev cuam tshuam rau kev cuam tshuam. Qhov kev pom zoo tshaj plaws tsis kam feem ntau yuav tsum sib npaug nrog lwm cov khoom xws li tawv, thiab corrosion tsis kam nyob ntawm ntawm ntawm cov kev pabcuam.
Cov ntaub ntawv muag muag puas tuaj yeem hnav tsis kam?
Yog lawm, los ntawm cov txheej txheem sib txawv dua cov ntaub ntawv nyuaj. Cov log tsheb ris tsho qhia tau cov ntsiab cai no - Tus txheej txheem muag muag tau zoo heev coj lub neej los ntawm kev ua kom zoo thiab tawv. Cov khoom muaj cai nyob rau hauv lub nra thiab rov qab, faib cov khoom hnav ntau txog ntau lub voj voog. Self {{4} Lubricating polymers tseem muab cov kev coj ua tau zoo txawm tias muaj kev tawv tawv tsis tshua muaj zog los ntawm kev sib txhuam tsis tshua muaj zog uas ua rau hnav.
Dab tsi yog qhov sib txawv ntawm kev hnav tsis kam thiab ua tsis taus?
Puas yog kev tawm tsam tshwj xeeb tsis kam rau kev nyuaj lossis ntxhib sib chwv, sawv cev rau ib hom kev hnav khaub ncaws. Hnav kev tawm tsam muaj kev puas tsuaj ntxiv ntxiv Plus Pluas Khaub Ncaws Hnav, Corrosive hnav, thiab kev nkees nkees. Cov khoom ua tau zoo rau kev ua tsis zoo rau kev hnav tsis zoo nyob rau hauv cov kev coj sib txawv
Yuav ua li cas cov kev kho nyob rau kev txhim kho kev coj tsis kam?
Kev kho cov npoo npoo tsim cov khaubncaws sab saum npoo av tsim cov khaubncaws sab nraud povtseg lossis tiv thaiv txheej txheem hla cov ntaub ntawv txheej txheej, ua ke hnav - cov chaw tiv taus tawv me me. Carburizing lossis nitriving diffuses cov khoom rau hauv cov khaubncaws sab nraud pov tseg, ua kom tawv tawv los ntawm kev kho cua sov. Siv cov txheej txheem zoo li chrome tshuaj plating, thermal tsuag, los yog laser cladding ntxiv cov khoom siv nrog cov ntoo zoo dua. Cov hau kev no ua kom zoo rau saum npoo thiab substrate cov khoom ntawm yus tus kheej, feem ntau ua tiav kev ua tau zoo nyob rau hauv ib leeg {}} Cov khoom siv.
Tseem Ceeb Takaways
Hnav tsis kam nyob ntawm ntau cov khoom siv - hardness, thiab corrosion tsis kam - tsis hardness ib leeg
Plaub thawj cov ris tsho thawj (nplaum, cov qoob loo, muaj xeb, ua kom muaj kev nkees nkees) yuav tsum muaj cov tswv yim sib txawv
Kev txhaj tshuaj hlau tsim tawm cov khoom nrog cov khoom siv zoo dua homogeneity, kev xa mus raws li kev ua tau zoo thoob plaws cov kev ua tau zoo
Cov qauv ntsuas kev ntsuas muab cov khoom sib piv cov qeb, tab sis txhais lus txhais tau los ua kev ua haujlwm yuav tsum nkag siab cov haujlwm
Cov hnav - Cov ntaub ntawv lag luam tsis kam nthuav dav, uas tau tsav los ntawm kev ua haujlwm thev naus laus zis hauv cov txheej txheej thiab kev kho mob saum npoo
Cov Ntaub Ntawv Teev
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