Dab tsi yog qhov thermal cov khoom ntawm stellite 6?

Stellite 6, ib tug cobalt {{1} Hais txog cov cua sov uas ua rau nws cov kev siv rau hauv qhov kev ntsuas kub hauv qhov chaw siab. Cov khoom cua thermal no, suav nrog kev nthuav dav hluav taws xob, thermal conduction, siab} kev ua kom muaj zog ua haujlwm, rov ua kom zoo dua qub- sov kis tau, lossis thermal cycling.
Thermal nthuav tawm: Qhov seem ruaj khov hauv qhov kub hloov
Kev nthuav dav thermal no hais txog qhov tshwm sim uas cov kev hloov pauv ntawm cov khoom ntim lossis ntev vim kub. Rau stellite 6, nws coefficient ntawm thermal expansion yog qhov taw qhia tseem ceeb ntawm nws qhov seem ruaj khov nyob rau hauv tshav kub. Feem ntau, txoj kab kev nthuav tawm coefficient ntawm stellite 6 li 12 txog 14 × 10-600 degree. Qhov kev hloov pauv piv txwv no tso cai rau nws kom muaj qhov ntev nyob rau qhov ntev thaum uas yog qhov tseem ceeb rau cov khoom siv uas yuav tsum muaj kev sib thooj lossis ua kom pom tseeb.
Hauv kev siv cov kev siv, xws li lub rooj zaum valve nyob rau hauv high- cov raj dej kub, stellite 6 tus tswj kav sov kev hloov pauv uas tuaj yeem ua rau tolete lossis jamming. Piv txwv li, thaum lub rooj zaum hauv stellite 6 yog nthuav tawm high- kev nthuav dav (txog li 500℃tau kwv yees thiab nyob rau hauv kev txwv. Qhov no kom ntseeg tau tias nws tseem kaw ntom nti tawm tsam lub discter disc, txawm tias nyob rau hauv thermal kev ntxhov siab. Hauv kev sib piv, cov ntaub ntawv nrog ntau dhau thermal nthuav coefficients tej zaum yuav nthuav dhau kev tsim kho, ua rau foob tsis ua haujlwm.
Thermal Conductivity: Tshav Kub Dissipation muaj peev xwm
Thermal ua kev ntsuas cov khoom siv lub peev xwm los ua kom muaj cua sov. Stellite 6 muaj cov thermal tsawg thermal, feem ntau nyob ib ncig ntawm 10-15 w / (map k) ntawm chav sov. Qhov no txhais tau tias nws tsis hloov hluav taws kub kom sai li cigals xws li tooj liab lossis txhuas, uas tuaj yeem yog ob qho txiaj ntsig thiab kev txiav txim siab nyob ntawm daim ntawv thov.
Nyob rau hauv high - kub cov ris teeb meem dig hauv cov nroj tsuag hluav taws xob, qhov qis thermal conductivity ntawm stellite 6 sawv daws ua tus tiv thaiv. Thaum cov yob nkag mus rau hauv kev sib cuag nrog kub thee hais (nyob ib ncig ntawm 300-400 degree), qhov qeeb hloov pauv kev pheej hmoo ntawm cov hauv zos overheating rau saum npoo. Qhov no pab tswj lub hardness ntawm yob txheej txheej txheej- Vim tias kub dhau lawm tuaj yeem soften cov khoom thiab ua kom zoo hnav. Txawm li cas los xij, hauv cov ntawv thov uas kub kub dissipation yuav tsum muaj, xws li cov pa roj cua sov yuav txwv tsis pub nws siv tshwj tsis yog ua kom sov- Ua cov khoom siv hluav taws xob.
High -} kub lub zog ceev cia: Txhua yam ruaj khov ntawm kev nce kub
Ib qho ntawm stellite 6 feem ntau cov cua sov feem ntau yog nws lub peev xwm los tuav cov neeg kho tshuab lub zog ntawm kev kub siab. Tsis zoo li ntau cov alloys uas poob hardness thiab tensile muaj zog sai dua 500 degree, cov khoom tseem ceeb ntawm nws cov khoom siv tam sim no.
Nyob rau hauv chav tsev kub, stellite 6 muaj lub pob zeb hluav taws xob (HRC) ntawm 38-42 thiab lub tensile lub zog ntawm kwv yees li 1,000-1,200 MPa. Thaum raug rau kub txog 600 degree, nws hardness tseem nyob saum hrc 30, thiab nws lub zog tensile tseem nyob ib puag ncig 700-800 MPa. Qhov kev ua tiav ntawm lub zog yog ntaus nqi rau nws cov cobalt- Tus carbide- Tus carbide {15} {15} {15} {15}
Cov cuab yeej no ua rau stellite 6 zoo tagnrho rau cov khoom xws li cov nroj tsuag boiler, uas ua haujlwm nyob rau hauv tas mus li siab-}} heat degree). Lub nozle yuav tsum wallet tsis tsuas yog cov kev ua tiav kev cuam tshuam ntawm cov roj kub uas kub tab sis kuj ua kom muaj kev ntseeg siab kom tsis txhob muaj kev ntseeg. Stellite 6's high - lub zog kub kom ua kom pom nws cov kab ke thiab kev ua haujlwm ntau dua kev pabcuam ntev ntev.
Oxidation tsis kam: tsis kam mus rau high - kub corrosion
Oxidation tsis kam yog cov cuab yeej thermal uas piav qhia cov khoom muaj peev xwm tiv thaiv cov tshuaj lom neeg nrog oxygen ntawm cov ntsuas kub. Stellite 6 paub zoo nyob rau hauv no pain vim nws cov ntsiab lus chromium (27-32%). Thaum nce kub, chromium cov ntaub ntawv ntom, cov lus qhia chromium (cr₂o₃) zaj duab xis nyob rau Alloter los tiv thaiv kev sib txawv ntxiv rau hauv cov khoom.
Stellite 6 tuaj yeem tawm tsam oxidation nyob rau hauv huab cua ntawm qhov kub ntawm 1,000℃rau ncua sijhawm. Txawm tias tom qab 1,000 teev ntawm kis tau rau 800℃txheej, tus oxide txheej lawm, nrog tsawg kawg nkaus poob (feem ntau tsawg dua 0.1 mg / cm / cm / cm / cm² ib teev). Qhov no yog qhov zoo dua rau ntau cov pa roj carbon lossis tsawg {- alloy} ecoflize cov hlau, uas yuav xoob, flaky xeb hauv tib qho kev mob.
Hauv cov ntawv thov xws li kev tso pa valve nyob rau hauv high - kev kub ntxhov tuaj yeem ncav cuag 850℃tau mus txog 850℃tau mus txog 850 qib no yog qhov tseem ceeb. Lub rooj zaum hauv nruab nrab yog ib txwm nthuav tawm cov pa roj cua sov uas muaj pa thiab combustion los ntawm - cov khoom. Yog tsis muaj oxidation zoo tsis kam, lub saum npoo yuav txwv, ua rau hnav, txeej, thiab cav tsis ua haujlwm. Stellite 6's oxide zaj duab xis tiv thaiv xws li kev mob siab, ua rau ntev- sij hawm kev ntseeg tau.
Thermal poob siab kuj: kev ua siab ntev rau kev hloov pauv kub sai
Thermal poob siab tsis kam hais txog cov ntaub ntawv muaj peev xwm tiv taus kom muaj kev hloov pauv sai yam tsis muaj kev tawg. Cov cuab yeej no yog nyob ntawm kev sib xyaw ntawm cov kev nthuav dav thermal, thermal conductivity, thiab tawv. Stellite 6 muaj qhov nruab nrab thermal poob siab, uas yog txaus rau ntau daim ntawv thov kev lag luam tab sis tsis siab li qee qhov nibel {}} raws supalloys.
Nws qhov kev nthuav dav nruab nrab hluav taws xob thiab cov kev hloov ua hluav taws xob tsis tshua muaj txhais tau tias qhov kev hloov pauv tam sim no (piv txwv li ntawm 20℃hauv vib nas this) tuaj yeem tsim kev ntxhov siab thermal. Txawm li cas los xij, nws lub cobalt Matrix muab cov qib nyuaj ntawm kev nruj uas yuav pab txo cov kev ntxhov siab no. Hauv kev xyaum, Stellite 6 tuaj yeem zam lub zog bermal thermal poob rau hauv cov ntawv thov, nyob qhov twg yuav sib cuag cov hlau (500-700 degree) thiab tom qab ntawd txias los ntawm dej. Thaum rov hais dua cov kev poob siab heev yuav kawg ua rau microcracks, xws li tsim nyog (xws li ntxiv nws lub neej kev pabcuam.
This property is less critical for Stellite 6's primary use cases-wear-resistant components in steady high-temperature environments- but it remains a consideration for applications involving intermittent heating and cooling.​
Cov tswv yim cuam tshuam ntawm stellite 6's thermal Khoom
Lub thermal cov khoom ntawm stellite 6 colleively 6 unable nws siv nyob rau hauv kev xav tau ib puag ncig uas kub, hnav, thiab oxidation coincide. Piv txwv li:
• Nyob rau hauv cov roj thiab roj kev lag luam, stellite 6 valve trim (rooj thiab discs}}} kub (HPHT) WELLS (txog 350 degree). Nws cov kev nthuav dav thermal zoo nrog kev ua phooj ywg, tiv thaiv kom tsis txhob xau; Nws oxidation tsis kam tiv taus corrosive roj; Thiab nws lub siab- lub zog tiv taus deformation hauv siab.
• Hauv Aerospace Av txhawb nqa cov khoom siv, xws li pob zeb cav ntsuas cov khoom siv, stellite 6 Cheebtsam kom muaj cua luv luv thaum lub sijhawm ntsuas cua. Lawv oxidation tsis kam thiab lub zog ua kom tsis txhob muaj teeb meem deb, thaum lawv lub thermal stability zam kev hloov pauv uas tuaj yeem cuam tshuam yog qhov ntsuas raug.
Hauv cov ntsiab lus, stellite 6 lub zog cua sov {}} tswj tau thermal kev tuav, ua rau nws muaj ntau yam khoom siv rau siab- kub kev lag luam. Cov khoom muaj tseeb tias nws tuaj yeem ua kom ntseeg tau nyob hauv ib puag ncig uas kub thiab tshuab kev ntxhov siab ntawm cov khoom sib xyaw ua ke, kev tsim khoom, thiab ib qho chaw aerospace.