Yuav Stellite yuav welded?

Stellite, ib tsev neeg ntawm cobalt - Raws li cov muaj zog, thiab cov txheej txheem muaj zog ntau dua li vuam hlau lossis cov hlau tsis muaj hlau. Nws cov cim sib xyaw tshwj xeeb (cov chromium siab, Tungsten, thiab cov ntsiab lus carbon thiab microstructure tsim cov kev sib tw uas xav tau kev tswj xyuas tshwj xeeb. Hauv qab no yog cov ncauj lus kom ntxaws txog kev sib tw vuam, suav nrog txoj hauv kev, cov kev sib tw, thiab kev txiav txim siab tseem ceeb.
1. Ua kom muaj kev sib tw vuam
Stellite vuam yog dav laij hauv kev lag luam, feem ntau rau ob lub hom phiaj:
• Koom nrog cov khoom sib txawv: Txuas cov khoom sib txawv rau ib leeg lossis rau cov khoom siv hauv paus (piv txwv li, cov qauv sib dhos.
• Cov tawv me me: Tso cov stellite mus rau saum npoo ntawm cov softer (zoo li cov khoom siv roj (xws li cov ntaub qhwv roj carbon) los txhim kho kev hnav lossis corrosion tawm tsam (piv txwv, cov rooj zaum valve).
Yuav luag txhua tus vuam cov txheej txheem tuaj yeem hloov kho rau stellite, txawm hais tias ib co yog qhov ua tau zoo dua li lwm tus vim muaj alloy cov yam ntxwv.
2. Cov kev sib tw vuam rau stellite
Kev xaiv ntawm kev vuam txoj kev nyob ntawm daim ntawv thov (koom nrog vs. hardfacing), feem loj me, thiab xav tau weld zoo. Ntawm no yog cov tswv yim siv thev naus laus zis feem ntau:
• Roj Tungsten Arc Vuam (GTaw / TIG):
◦ nyiam rau qhov tseeb rau kev koom nrog lossis nyias cov ntu stellite.
◦ Siv ib qho tsis -} Consumable tungsten elegsten electrode thiab inert gas (argon) tiv thaiv oxidation.
◦ Qhov zoo: tswj tau zoo heev dua cov lus tawm ua tshav sov, minimal tshob, thiab huv welds.
• Roj Hlau Arc Vuam (Gmaw / Mig):
◦ haum rau cov ntu thicker lossis siab - tso zis hardfacing.
◦ Siv hlau cov hlau uas tau txais txiaj ntsig zoo li ob lub electrode thiab muab tub lim, nrog cov thaiv pa.
◦ Qhov zoo: cov nqi tso nyiaj ntau dua li tsov, ua rau nws muaj txiaj ntsig rau cov loj- thaj chaw ua haujlwm.
• Kev thaiv cov hlau vuam (smaw / pas):
◦ Siv stellite -} coated electrodes rau portability, piv txwv, khoom siv mining lossis kev lag luam li qub).
◦ Feem ntau yuav tsum tau tiv thaiv cov ntaub thaiv npog, tab sis yuav tsum muaj kev txawj kom tsis txhob muaj Slag suav nrog.
• Plasma pauv ARC (PTA) VUAM:
Txoj kev tshwj xeeb rau kev nyuaj, uas tus mob ntshav arc melts stellite hmoov thiab tso nws mus rau hauv cov khoom siv hauv paus.
At tsim ntom ntom, siab {{- Qhov ua tau zoo tso nrog tsawg heev los ntawm lub hauv paus hlau, khaws cia stellite lub ris kev tiv thaiv.
3. Cov nyom ntawm cov vuam vuam
Stellite txoj kev sib xyaw - cov roj chromium siab (20-30%), thiab carbon%) {tsim tshwj xeeb cov hurdles:
• Nrib pleb txoj kev pheej hmoo:
◦ Kiab tawg: carbon thiab alloying cov ntsiab (chromium, tungsten) formly carrittaries ntawm cov ciaj ciam ntawm cov nplej. Sai sai txias thaum lub sij hawm vuam yuav tau cuab cov carbides sai sai, ua rau tawg ua weld solidifies.
◦ Khaub thuas tawg: Yog tias cov khoom siv hauv paus yog lub siab}}}}}}}}}} paab lossis paug) tuaj yeem ua rau tawg tom qab txias.
• Oxidation rhiab:
◦ Cov chromium thiab cobalt oxidize yooj yim ntawm qhov kub thiab txias, sib sau cov oxides uas tsis muaj zog Welsed. Kev tiv thaiv kom tsim nyog (inert gases zoo li argon) yog qhov tseem ceeb los tiv thaiv qhov no.
• Siab melting point:
◦ Stellite melts ntawm ~ 1,300-1,400℃(siab dua li cov roj carbon steel ~ 1,538℃ntau yam), nce txoj kev pheej hmoo ntawm kev txias tawg thiab kev nyuaj siab tsim.
Teeb Meem:
◦ Thaum vuam stellite mus rau ib lub hauv paus hlau (piv txwv li, hlau), kev sib xyaw ntau dhau (dilution) tuaj yeem txo cov ntsiab lus Weld cov ntsiab lus, txo nws cov txiaj ntsig tsis kam.
4. Cov lus qhia tseem ceeb rau kev ua tiav stellite vuam
Yuav kom kov yeej cov kev cov nyom no, ua raws cov kev coj ua zoo tshaj plaws:
• Pre6 - weld npaj:
◦ cov chaw huv huv kom tshem tawm cov roj, xeb, lossis pleev xim (siv ib lub tshuab txhuam lossis kuab paug) kom tiv thaiv kev nqus thiab hydrogen nqus.
◦ Rau cov kab tuab lossis siab - Cov hlau roj carbon hauv paus, preheat rau 200-400 degree. Qhov no qeeb qeeb, txo kev ntxhov siab, thiab txo qis carbide tsim.
• Vuam tsis:
◦ Siv cov kev tawm suab cua sov tsawg: khaws kev volcage thiab taug kev ceev ceev kom tsis txhob overheating, uas exacerbates carbide tsim thiab oxidation.
◦ Xaiv Xaiv Loorers: Siv stellite - refle folding xaim hlau / electrodes (piv txwv li, stellite 6) kom muaj kev tswj hwm alloy.
• Kev thaiv thiab tshaj tawm - Weld Kev Kho Mob:
◦ Muaj tseeb tias tag nrho cov roj shielding (piv txwv, Argon Flow tus nqi ntawm 10-15 L / min rau tiv thaiv lub pas dej weld thiab cua sov}} bein cuam tshuam thaj chaw (Haz).
◦ ncej post - Weld Annealing (600-700 Qib rau 1-2 teev, ua kom qeeb li ntawm carbides nyeg carbides, txo kev phom sij brittual, txo qis kev pheej hmoo.
• Zam kev noj qab haus huv (rau kev tawv):
Siv kev siv PTA zoo li PTA vuam lossis qis - mig kom txwv kev sib xyaw nrog cov hlau sib xyaw ua ke thiab hnav tsis kam.
5. Cov ntawv thov ntawm welded stellite
Txawm hais tias nws cov kev cov nyom, Welded stellite yog qhov tseem ceeb hauv kev lag luam uas xav tau cov Cheebtsam ruaj khov:
• Roj thiab roj thiab roj: welded stellite valve rooj thiab stems tsis tua yaig los ntawm high {{}} qhov siab kua.
• Aerospace: stellite hardfacing rau turbine hniav los yog cav qhov chaw tiv thaiv kub siab thiab kev sib txhuam.
• Tsuas: Welded stellite cov lus qhia ntawm tho cov khoom lossis cov pob zeb Crusher txhim kho kev coj tawm.
Tag
Stellite tuaj yeem welded nrog txoj kev txawj ntse, txawm tias nws yuav tsum npaj ua tib zoo npaj kom muaj kev tawg, oxidation, thiab ua haujlwm txaus ntshai. Los ntawm kev xaiv txoj kev tsim nyog (piv txwv li, PTA), tswj hwm cov lus qhia tshav kub, cov kab sib luag, cov kab ke ruaj khov uas khaws cov khoom tseem ceeb. Thaum tsis ncaj raws li vuam hlau, stellite vuam yog lub zoo-} nrhiav kev ua haujlwm tseem ceeb rau lub neej ntawm kev muaj lub neej.