Saib, thaum neeg feem coob hnov Stellite bearing, lawv tam sim ntawd xav tias indestructible. Qhov ntawd yog thawj qhov yuam kev. Nws yog cobalt-chromium alloy, yog, tshwj xeeb tshaj yog nyuaj thiab resistant rau hnav, galling, thiab corrosion. Tab sis nplawm Stellite rau ntawm qhov chaw bearing tsis yog qhov kho kom zoo nkauj. Kuv tau pom cov qauv tsim tsis tau vim tias ib tus neeg tau teev nws rau daim ntawv thov tsis raug, xav hardness ib leeg daws txhua yam. Qhov kev muaj tiag yog ntau nuanced - nws yog hais txog kev nkag siab qhov twg hardness ua hauj lwm, qhov twg nws yuav overkill, thiab tseem ceeb heev, yuav ua li cas koj tau txais nws mus rau qhov kev ntseeg siab.
Alloy Nws tus kheej thiab qhov twg Nws Tiag Tiag
Stellite tsis yog ib qho qauv. Koj tau txais qib zoo li 6, 12, 21 ... txhua tus nrog tweaks hauv tungsten, carbon, molybdenum cov ntsiab lus. Rau cov kabmob, koj feem ntau nyob hauv thaj tsam ntawm Stellite 6 lossis nws cov kwv tij txheeb ze. Nws lub txiaj ntsig tseem ceeb tsis yog qhov nyuaj xwb (uas yog nyob rau ntawd, nyob ib puag ncig 40-50 HRC li-cam khwb cia, siab dua yog tias tawv), tab sis nws muaj peev xwm khaws cia qhov nyuaj ntawm qhov kub siab thiab nws qhov ze-ua tiav rau kev txeeb. Qhov no ua rau nws mus rau qhov xwm txheej uas lubrication yog marginal, sib quas ntus, los yog tsis yooj yim sua - xav tias lub tes tsho twj tso kua mis hauv abrasive slurry, valve trunnions nyob rau hauv high-temperature chav, los yog tej yam hauj lwm nyob rau hauv huab-lub luag hauj lwm mixers.
Kuv nco qab txog qhov project rau cov neeg siv tshuaj lom neeg. Lawv muaj cov ntawv xov xwm stainless hlau ncej hnav tawm hauv lub lis piam vim muaj kev sib xyaw ua ke ntawm cov kua qaub me me thiab cov khoom nqa tawm. Lubrication yog tsis mus. Peb thov ib Stellite bearing lub tes tsho overlay ntawm phau ntawv journal. Tus yuam sij tsis yog qhov kev xaiv khoom xwb, tab sis qhia txog Stellite 6B rau kev tiv thaiv corrosion zoo dua li tus qauv 6. Qhov kev sib txawv tseem ceeb hauv av.
Flip sab? Nws yog nkig. Koj tsis tuaj yeem nqa cov khoom siv Stellite-coated thiab cia siab tias nws yuav tiv taus qhov kev poob siab hnyav lossis cov ntsiab lus cuam tshuam. Nws yuav nti los yog tawg. Kuv tau kawm tias txoj kev nyuaj thaum ntxov nrog daim ntawv thov pob zeb crusher. Cov lus qhia tshwj xeeb hu rau Stellite overlays ntawm lub vaj tse, tab sis tus qauv tsim tsis suav rau qee zaus tramp hlau. Qhov tshwm sim: kev puas tsuaj loj zuj zus tom qab ob peb lub hlis. Peb yuav tsum rov qab mus rau qhov nyuaj dua, txawm tias tsis tshua hnav-tiv taus, cov khoom siv hauv zos nrog lub ntsej muag nyuaj.
Kev tsim khoom Crucible: Casting vs. Overlay
Qhov no yog qhov uas cov roj hmab tau raws txoj kev. Koj tsis feem ntau nrum tag nrho cov kabmob loj loj los ntawm cov khoom Stellite-nws yog qhov txwv tsis pub kim thiab cov kev sib tw ua rau loj, suab nrov yog qhov tseem ceeb. Txoj kev siv nyiaj ntau tshaj yog siv cov Stellite overlay mus rau ib qho nyuaj, ntau cov ntaub ntawv zoo li carbon steel lossis 316 stainless.
Qhov no yog qhov uas tus khub tus txheej txheem muaj peev xwm dhau los ua qhov tseem ceeb. Tuam txhab uas muag uas tau nyob rau hauv precision casting thiab machining rau xyoo lawm, zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), tau pom cov voj voog no. Nrog ntau tshaj 30 xyoo nyob rau hauv plhaub pwm thiab peev casting, lawv nkag siab txog metallurgical bonding. Rau ib Stellite bearing nto, txheej txheem overlay-feem ntau hmoov welding los yog PTA (Plasma Transferred Arc)-yuav tsum tau tswj kom tsis txhob dilution ntawm Stellite rau hauv lub hauv paus hlau thiab kom txo tau kub-cuam tshuam cheeb tsam tawg. QSY cov keeb kwm yav dhau los ua haujlwm nrog cov alloys tshwj xeeb, suav nrog cov cobalt-based, muab ib ceg rau hauv cov txheej txheem kev kho cua sov ua ntej thiab tom qab cua sov, uas tsis tuaj yeem sib tham kom ua tiav.
Kuv tau tshuaj xyuas qhov ua tsis tau zoo overlays qhov twg Stellite txheej tsuas yog rub tawm. Lub hauv paus ua rau? Yuav luag ib txwm tsis tsim nyog qhov chaw npaj lossis cov khoom siv interlayer tsis raug. Qee lub sij hawm koj xav tau nickel-raws li tsis muaj txheej txheem ntawm cov ncej hlau thiab Stellite los tswj qhov sib txawv thermal expansion. Nws yog cov ntsiab lus gritty uas cais cov haujlwm ua haujlwm los ntawm tus neeg sib tw khib nyiab.
Machining thiab Finishing: Qhov Kawg Hurdle
Okay, koj tau txais koj cov txheej txheem Stellite tiav lawm. Tam sim no koj yuav tsum tau tshuab nws kom meej bearing tolerances. Nov yog lwm tus tsiaj nyaum. Koj tsis tuaj yeem siv tus qauv HSS lossis txawm tias qee cov cuab yeej carbide; koj xav tau cov qib tshwj xeeb ntawm carbide, feem ntau nrog cov geometry tshwj xeeb, lossis koj mus rau kev sib tsoo. Nws qeeb, nws noj cov cuab yeej, thiab nws kim heev.
CNC machining kev txawj ntse yog qhov tseem ceeb ntawm no. Cov nqi pub, ceev, thiab qhov tob ntawm kev txiav yog txawv kiag li ntawm machining me steel. Lub khw uas feem ntau ua txhuas lossis cov hlau dawb yuav tawm tsam thiab tsim cov khoom tsis zoo uas ua rau cov kabmob ua haujlwm tsis zoo. Qhov kawg ntawm a Stellite bearing nto yuav tsum tau zoo heev los tiv thaiv kev pib tawg thiab ua kom muaj kev sib khi zoo yog tias tsim nyog. Qhov no yog lwm qhov chaw uas cov khw sib koom ua ke uas tuav ob qho tib si ntawm daim ntawv thov alloy thiab kev ua haujlwm zoo, raws li tau hais hauv QSY cov kev pabcuam, tuaj yeem tswj xyuas qhov sib xws thiab kev lav phib xaub los ntawm tag nrho cov txheej txheem.
Peb muaj ib rooj plaub uas overlay yog zoo meej, tab sis qhov kawg sib tsoo qhia txog micro-cracks vim overheating. Ib feem dhau qhov kev tshuaj xyuas thawj zaug tab sis ua tsis tiav hauv kev pabcuam ntxov ntxov. Qhov kev kho tau hloov mus rau cov txheej txheem creep-feed sib tsoo nrog txhim kho kev xa khoom txias. Zaj Lus Qhia: cov txheej txheem saw tsis xaus ntawm kev tso nyiaj.
Daim Ntawv Thov Pitfalls thiab Real-World Compromises
Kev qhia txog Stellite tsis yog ib qho kev tawm dag zog. Koj yuav tsum xav txog qhov mating nto. Kev khiav Stellite tawm tsam nws tus kheej feem ntau yog kev coj tsis zoo - nws tseem tuaj yeem ua rau lub siab hnyav. Kev sib koom ua ke classic yog Stellite tiv thaiv cov khoom siv softer, sib xws xws li 316 stainless lossis bronze tshwj xeeb. Qhov no tso cai rau cov khoom siv softer hnav me ntsis, embedding tej abrasives thiab tiv thaiv Stellite.
Corrosion yog lwm qhov nuanced point. Thaum Stellite tiv thaiv ntau cov xov xwm corrosive, nws tsis yog universally inert. Hauv kev txo qis acids lossis ib puag ncig nrog cov tshuaj chlorides ntawm qhov kub thiab txias, koj yuav tsum sab laj cov lus corrosion ua tib zoo. Qee zaum, qib high-qib stainless los yog nickel-based alloy zoo li Hastelloy tej zaum yuav yog qhov kev xaiv zoo dua, txawm tias nws hnav tsis kam qis dua. Nws yog kev lag luam tawm.
Tus nqi ib txwm nkag rau hauv kev sib tham. Tag nrho cov txheej txheem Stellite overlay ntawm cov khoom loj tuaj yeem raug nqi 5-10x ntau dua li lub tes tsho steel qauv. Kev txiav txim siab yog los ntawm kev ncua sij hawm khiav, txo lub sij hawm tsis tau npaj tseg, thiab kev nyab xeeb hauv cov kaw lus kaw lossis nyuaj rau kev nkag. Koj tsis siv nws vim nws txias tech; koj siv nws vim tag nrho cov nqi ntawm cov tswv cuab lej ua haujlwm.
Saib ntawm Supply Chain
Sourcing txhim khu kev qha Stellite-cov kabmob Cheebtsam tsis yog hais txog kev nrhiav tus neeg muag khoom pheej yig tshaj. Nws yog hais txog kev nrhiav tus khub nrog kev paub txog metallurgical thiab kev tswj cov txheej txheem. 30-xyoo keeb kwm ntawm ib lub tuam txhab zoo li QSY hauv casting thiab machining tshwj xeeb alloys qhia tias lawv tau navigated txoj kev kawm nkhaus ntawm kev ua hauj lwm nrog cov ntaub ntawv nyuaj xws li cobalt thiab npib tsib xee alloys. Qhov kev paub no txhais ncaj qha rau hauv kev tsim khoom tsawg dua thiab cov lus qhia zoo dua thaum lub sijhawm tsim.
Thaum tshuaj xyuas tus neeg muag khoom, kuv tsis yog saib lawv daim ntawv qhia ci. Kuv nug txog lawv cov PTA weld overlaying tsis, lawv cov txheej txheem rau kev txheeb xyuas kev ncaj ncees (feem ntau yog kuaj ultrasonic), thiab lawv cov qauv kev coj ua rau kev ntxhov siab. Kuv xav pom lawv cov cuab yeej tuav txoj haujlwm nyuaj thaum lub sijhawm machining. Cov no yog cov unsexy, tswv yim cov ntsiab lus uas lav qhov ua hauj lwm.
Thaum kawg, a Stellite bearing kev daws teeb meem yog cov lus teb zoo heev rau cov txheej txheem tshwj xeeb ntawm kev lim hiam. Nws tsis yog khoom. Nws txoj kev vam meej hinges ntawm qhov sib sib zog nqus, kev nkag siab ntawm cov alloy tus cwj pwm los ntawm qhov chaw tsim khoom lossis vuam bay mus rau qhov kawg micron-theem tiav ntawm lub tshuab CNC. Tau txais nws txoj kev xav tias tsawg dua li kev vam meej ntawm thev naus laus zis thiab ntau dua li qhov nyuaj-tau txais txiaj ntsig ntawm kev hwm cov ntaub ntawv tshawb fawb thiab cov txheej txheem txwv.
