Qhov twg yog Brake Discs ua?

Yog tias koj tau xav paub qhov twg nres discs tau tsim, kab lus no tuaj yeem pab koj kom nkag siab txog qhov tseem ceeb hauv tsheb.Nres discs yog ua los ntawm ntau yam khoom sib txawv.Qee cov ntaub ntawv no muaj xws li steel, ceramic composite, carbon fiber, thiab cam khwb cia hlau.Kawm ntxiv txog txhua yam ntawm cov ntaub ntawv no kom nkag siab tias lawv ua li cas.Qhov no yuav ua rau koj muaj peev xwm zoo dua los txiav txim siab txog cov khoom koj xav tau.Tsis tas li, peb yuav piav qhia qhov sib txawv ntawm cov ntaub ntawv no thiab lawv ua haujlwm li cas.

Hlau

Yog tias koj tab tom nrhiav rau steel nres disc, koj tau tuaj rau qhov chaw zoo.Tsis tsuas yog cov discs ua haujlwm zoo kawg nkaus, lawv kuj muaj nqis heev.Steel brake discs yog tsim los ntawm kev tsim cov hlau, uas tiv taus hydrochloric acid.Cov neeg tsim khoom tam sim no tau siv cov hlau no los ua cov brakes uas muaj qhov ua tau siab tshaj plaws ntawm cov tawv nqaij thiab kev puas tsuaj.Cov alloys siv nyob rau hauv steel nres discs yog raws li cov pa roj carbon, chromium, thiab silicon, uas muab nws ib tug zoo heev durability.

Kev sib xyaw ua ke ntawm ob lub alloys muaj qhov cuam tshuam loj rau kev ua haujlwm tag nrho ntawm cov nres discs.A357 / SiC AMMC txheej saum toj kawg nkaus ua kom elongation, thaum kev sib txhuam do ua kom zoo dua cov khoom sib txuas kom txo tau qhov tawg.Cov khoom siv no muaj lub zog tensile siab tshaj plaws, uas muab lub zog nruj uas xav tau los ntawm tus nres disc lub cev.Txawm li cas los xij, tsis zoo li steel, hybrid composite discs muaj kev hnav zoo dua.Nws yog qhov zoo tshaj plaws rau cov ntawv thov uas yuav tsum muaj kev hnav tsis zoo.

Steel brakes kuj tseem tiv taus corrosion ntau dua li cov brakes.Ntxiv mus, lawv yog pheej yig dua li lwm txoj kev.Koj tuaj yeem txuag tau nyiaj ntau los ntawm kev yuav cov khoom lag luam tshiab nres.Hlau nres discs tuaj yeem siv sijhawm ntev nrog cov ntaub pua tsev zoo.Cov txheej txheem no yuav ua kom muaj kev sib tw ntawm tus nres thiab yuav tiv thaiv txhua yam kev puas tsuaj los ntawm qhov tshwm sim.Tab sis, nws tsis yog tsis muaj nws drawbacks.Piv txwv li, yog tias koj muaj ib lub disc nrog cementite inclusions, nws yuav tsis tuaj yeem hloov kho nws.

Cov khoom siv hauv steel nres discs yuav tsum tau ua los ntawm ceramics uas muaj peev xwm tiv taus thermal puas.Tsis tas li ntawd, cov khoom siv ceramic kuj yuav tsum yog cov thermal conductors zoo.Tus nqi ntawm tshav kub hloov mus rau qhov ntsuas kub ua hauj lwm ntawm lub disc qhov chaw sib cuag.Thaum koj yuav lub steel nres disc tshiab, koj tuaj yeem tau txais kev lees paub rau nws yog tias koj xav hloov nws.Muaj ntau yam laj thawj vim li cas steel nres discs yuav yog qhov kev xaiv zoo dua.

Ceramic composite

Lub neej yav tom ntej ntawm ceramic nres disc yog ci.Cov discs no muaj peev xwm los txhim kho roj kev lag luam thaum tib lub sij hawm txo qhov kev ncua deb.Txhawm rau tsim cov brakes no, yuav tsum muaj kev qhia dav dav ntawm txoj kev thiab taug qab kev sim.Thaum lub sij hawm tus txheej txheem no, lub thermal load muab tso rau ntawm ib tug disc nres yog ntsuas los ntawm lub cev thiab tshuaj txhais tau tias.Cov teebmeem ntawm kev siv qhov kub thiab txias tuaj yeem thim rov qab lossis hloov tsis tau nyob ntawm seb hom nres nres thiab qhov kev ua haujlwm.

Lub downside rau CMCs yog tias tam sim no lawv kim heev.Txawm li cas los xij, txawm tias lawv cov kev ua tau zoo tshaj plaws, lawv tsis tau siv ntau hauv kev lag luam tsheb.Txawm hais tias cov khoom siv raw siv tsis yog kim, cov nqi tseem siab, thiab raws li CMCs nce hauv qhov chaw, cov nqi yuav tsum tau nqis los.Qhov no yog vim CMCs tsim tsuas yog me me ntawm cov cua sov, thiab cov thermal expansion ntawm lub nres discs tuaj yeem ua rau cov khoom tsis muaj zog.Cracking kuj tuaj yeem tshwm sim ntawm qhov chaw, ua rau lub nres nres tsis zoo.

Txawm li cas los xij, carbon-ceramic brake discs yog kim heev.Kev tsim cov discs tuaj yeem siv sijhawm 20 hnub.Cov brakes no yog qhov hnyav heev, uas yog ib qho ntxiv rau cov tsheb sib zog.Txawm hais tias carbon-ceramic brake discs yuav tsis yog qhov kev xaiv zoo tshaj plaws rau txhua lub tsheb, lub teeb yuag thiab ruaj khov ntawm cov khoom ua rau lawv muaj kev xaiv zoo rau cov tsheb ua haujlwm siab.Feem ntau, tus nqi ntawm ceramic composite discs yog hais txog ib nrab ntawm cov nqi ntawm steel discs.

Cov pa roj carbon-carbon nres disc yog kim, thiab kev puas tsuaj yog kev txhawj xeeb nrog cov nres discs.Carbon ceramic discs yog khawb heev, thiab cov chaw tsim khoom pom zoo kom koj pad cov discs nrog cov khoom tiv thaiv.Qee lub tsheb qhia txog cov tshuaj thiab cov tshuaj ntxuav lub log tuaj yeem ua rau cov pa roj carbon monoxide puas.Carbon ceramic discs kuj tuaj yeem khawb thiab ua rau cov pa roj carbon splinters tsim hauv koj cov tawv nqaij.Thiab yog tias koj tsis ceev faj, carbon-ceramic disc tuaj yeem xaus rau hauv koj ceg tawv.

Cam khwb cia hlau

Cov txheej txheem ntawm zinc txheej cam khwb cia hlau nres discs tsis yog tshiab.Thaum lub sij hawm tsim cov txheej txheem, lub disc yog ntxuav nrog chilled hlau angular grit thiab ib txheej ntawm zinc yog thov.Cov txheej txheem no hu ua sherardizing.Nyob rau hauv cov txheej txheem no, ib tug hluav taws xob arc melts zinc hmoov los yog hlau nyob rau hauv ib lub nruas thiab ua nws mus rau lub disc nto.Nws yuav siv sij hawm li 2 teev los txiav cov brake disc.Nws qhov ntev yog 10.6 nti inch los ntawm 1/2 nti tuab.Lub nres nres yuav ua rau sab nraud 2.65 nti ntawm lub disc.

Txawm hais tias cam khwb cia hlau nres discs tseem siv los tsim qee lub tsheb, cov tuam txhab tau nce nrhiav lwm cov ntaub ntawv los ua cov khoom no.Piv txwv li, lub teeb yuag brakes tuaj yeem ua kom muaj kev ua haujlwm siab dua thiab txo lub tsheb hnyav.Txawm li cas los xij, lawv cov nqi yuav piv rau cov cam khwb cia hlau nres.Kev sib xyaw ua ke ntawm cov ntaub ntawv tshiab yog qhov kev xaiv zoo tshaj plaws los ua kom lub tsheb ua haujlwm tau zoo thiab txhim kho kev ua haujlwm.Cov npe hauv qab no yog qee qhov txiaj ntsig ntawm aluminium-based brake discs.

Los ntawm cheeb tsam, lub ntiaj teb no kev lag luam rau cam khwb cia hlau nres disc yog segmented rau hauv peb cheeb tsam loj: North America, Europe, thiab Asia Pacific.Hauv Tebchaws Europe, kev ua lag luam yog txuas ntxiv los ntawm Fabkis, Lub Tebchaws Yelemees, Ltalis, Spain, thiab So ntawm Tebchaws Europe.Hauv Asia-Pacific, kev ua lag luam rau cam khwb cia hlau nres disc yog kwv yees tias yuav loj hlob ntawm CAGR ntawm ntau dua 20% los ntawm 2023. Middle East thiab Africa xav tias yuav loj hlob sai tshaj plaws nyob rau xyoo tom ntej, nrog CAGR ntawm ib ncig ntawm 30%. .Nrog rau kev lag luam tsheb loj zuj zus, cov kev lag luam tshiab tau nce kev yuav ob lub log.

Txawm hais tias qhov zoo ntawm aluminium brake discs, cam khwb cia hlau nres discs muaj ob peb qhov tsis zoo.Ntshiab aluminium yog nkig heev thiab muaj qhov hnav tsis kam, tab sis alloys tuaj yeem txhim kho nws qhov kev ua tau zoo.Aluminium nres discs tuaj yeem siv tau ntau xyoo, txo qhov tsis muaj zog ntawm 30% mus rau xya caum feem pua.Thiab lawv yog lub teeb yuag, siv tau zoo, thiab rov ua dua tshiab.Lawv yog ib qho kev xaiv zoo dua li cam khwb cia hlau nres discs.

Carbon fiber ntau

Tsis zoo li cov tsoos nres discs, cov pa roj carbon-carbon tuaj yeem tiv taus qhov kub thiab txias.Cov khoom siv woven thiab fiber-raws li cov khaubncaws sab nraud povtseg tso cai rau nws tiv thaiv thermal expansion thaum tseem yog lub teeb yuag.Cov khoom no ua rau nws zoo tagnrho rau cov nres discs, uas feem ntau siv hauv kev sib tw thiab dav hlau.Tab sis kuj muaj downsides thiab.Yog tias koj xav txaus siab rau cov txiaj ntsig ntawm carbon-fiber nres discs, koj yuav tsum paub me ntsis txog lawv cov txheej txheem tsim khoom.

Thaum cov pa roj carbon nres discs muaj ntau yam zoo hauv kev sib tw khiav, lawv tsis haum rau kev tsav tsheb txhua hnub.Lawv tsis tiv taus txoj kev kub thiab cov qauv carbon disc poob peb mus rau plaub millimeters tuab hauv 24 teev ntawm kev siv tas li.Cov pa roj carbon discs kuj yuav tsum tau coatings tshwj xeeb los tiv thaiv thermal oxidation, uas tuaj yeem ua rau muaj kev cuam tshuam loj heev.Thiab, carbon discs kuj muaj tus nqi siab.Yog hais tias koj tab tom nrhiav rau ib tug ruaj, high-zoo carbon brake disc, xav txog ib tug ntawm qhov zoo tshaj plaws nyob rau hauv lub ntiaj teb no.

Ntxiv rau qhov zoo ntawm qhov hnyav-txuag, carbon-ceramic brake discs kuj tseem siv tau ntev dua.Lawv yuav kav ntev dua li cov pa nres discs thiab tuaj yeem ua rau lub neej ntawm lub tsheb.Yog tias koj tsis tsav tsheb txhua hnub, koj yuav muaj peev xwm siv tau ib qho carbon-ceramic brake disc rau ntau xyoo lawm.Qhov tseeb, carbon ceramic discs raug suav tias yog qhov ruaj khov dua li cov tsoos nres discs, txawm tias lawv tus nqi siab dua.

Kev sib txhuam coefficient ntawm carbon-ceramic brake discs yog siab dua li ntawm cov cam khwb cia hlau discs, txo lub sij hawm ua kom braking los ntawm kaum feem pua.Qhov sib txawv kaum-foot tuaj yeem cawm tib neeg txoj sia, thiab tiv thaiv lub tsheb lub cev puas tsuaj.Nrog tshwj xeeb braking, carbon-ceramic disc yog qhov tseem ceeb rau lub tsheb ua haujlwm.Nws yuav tsis tsuas pab tus neeg tsav tsheb, tab sis kuj yuav txhim kho kev nyab xeeb ntawm lub tsheb.

phenolic cob

Phosphoric resin yog ib hom khoom siv hauv cov brakes.Nws cov khoom sib txuas zoo nrog fiber ntau ua rau nws hloov tau zoo rau asbestos.Nyob ntawm qhov feem pua ​​​​ntawm phenolic resin, nres discs tuaj yeem nyuaj thiab ntau dua compressive.Cov yam ntxwv no tuaj yeem siv los hloov cov asbestos hauv cov brakes.Qhov zoo tshaj plaws phenolic resin nres disc tuaj yeem ua neej nyob, uas txhais tau tias tus nqi hloov qis dua.

Muaj ob hom phenolic resin nyob rau hauv nres discs.Ib qho yog cov thermosetting resin thiab lwm qhov yog cov khoom tsis muaj polar, uas tsis yog-reactive.Ob hom resin yog siv los tsim cov brakes thiab cov ntaub qhwv.Cov phenolic resin yog siv nyob rau hauv kev lag luam nres ncoo vim nws decomposes ntawm txog 450 ° C, thaum lub polyester resin decomposes ntawm 250-300 ° C.

Tus nqi thiab hom binder ua lub luag haujlwm tseem ceeb hauv kev sib txhuam kev ua haujlwm ntawm phenolic resin nres disc.Cov phenolic resin feem ntau tsis tshua muaj kev tiv thaiv kub hloov dua li lwm cov ntaub ntawv, tab sis tuaj yeem ua kom ruaj khov nrog qee yam khoom ntxiv.Piv txwv li, phenolic resin tuaj yeem hloov kho nrog cashew txiv ntoo plhaub kua los txhim kho nws qhov nyuaj thiab kev sib txhuam coefficient ntawm 100 °.Qhov siab dua qhov feem pua ​​​​ntawm CNSL, qhov kev sib txhuam coefficient qis dua.Txawm li cas los xij, cov resin lub thermal stability tau nce, thiab ploj thiab rov qab tau txo qis.

Kev hnav thaum pib ua rau cov khoom tso tawm los ntawm cov resin thiab tsim ib lub toj siab loj.Lub toj siab tseem ceeb no yog hom kev sib txhuam ntau tshaj plaws.Qhov no yog cov txheej txheem dynamic, nyob rau hauv steel fibers thiab high-tensile hardened tooj liab los yog tooj dag hais ua rau kev sib cuag nrog lub disc.Cov khoom no muaj ib tug hardness tus nqi uas tshaj lub hardness ntawm lub disc.Lub toj siab kuj nyiam sau cov micrometric thiab submicrometric coj hais.