Cia peb hla lub suab nrov. Thaum tib neeg hnov Stellite 6, lawv feem ntau xav tias nws yog rab phom khawv koob - tsuas yog npuaj nws ntawm ib qho twg thiab hu nws ib hnub. Qhov ntawd yog ib qho yuam kev kim heev. Nws yog ib qho zoo heev cobalt-chromium alloy, yog, renowned rau galling kuj, hlau-rau-hlau hnav, thiab tuav ib tug ntug ntawm high temps. Tab sis specification thiab machining Stellite 6 ntu tsis yog ib lub checkbox ce; nws yog ib qho kev txiav txim siab, qee zaum ntxhov siab, kev xaiv. Kuv tau pom ntau txoj haujlwm uas cov khoom raug xaiv vim tias nws yog qhov nyuaj tshaj plaws lossis feem ntau hnav-tiv taus ntawm daim ntawv, tsis xav txog qhov kev tsim khoom tiag lossis hom tsis ua haujlwm tiag tiag. Nws tsis yog khoom siv xwb; nws yog kev cog lus rau cov txheej txheem tshwj xeeb.
Qhov Tseeb Ntawm Tau Nws Ua
Koj tsis yog xaj Stellite 6 zoo li 304 stainless. Cov saw hlau sib txawv. Peb tab tom tham txog cov chaw tsim khoom tshwj xeeb thiab cov tshuab ua haujlwm uas nkag siab txog cov txheej txheem exothermic thiab cov khoom siv tus cwj pwm. Thaum ntxov, peb sim kho nws zoo li tawv tawv. Qhov yuam kev loj. Rau lub rooj zaum valve qauv, peb mus nrog tus qauv peev casting tsev. Qhov tshwm sim? Micro-cracking thiab inconsistent hardness. Zaj lus qhia yog lim hiam: cov txheej txheem casting rau cobalt-based alloys yog nws tus tsiaj nyaum. Nws tsis yog tsuas yog melting thiab pouring; nws yog hais txog kev tswj qhov kub thiab txias thiab nkag siab li cas cov alloy solidifies. Qhov no yog qhov uas tus khub nrog cov khoom sib sib zog nqus-kev paub dhau los ua tsis muaj kev sib tham.
Kuv tau muaj hmoo zoo nrog cov khw uas qhia meej meej cov alloys tshwj xeeb raws li qhov tseem ceeb muaj peev xwm. Piv txwv li, tus neeg muag khoom zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) hais txog kev ua hauj lwm nrog cobalt-raws li alloys txoj cai nyob rau hauv lawv intro. Qhov ntawd yog lub teeb liab. Ib lub tuam txhab uas tau ua haujlwm hauv casting thiab machining rau ntau tshaj 30 xyoo tau pom qhov pitfalls. Lawv tsis tsuas yog muab Stellite 6 ntu; lawv (yuav tsum) muab cov txheej txheem kev paub ua kom lawv siv tau. Plhaub pwm thiab peev casting lawv sau muaj feem cuam tshuam, tab sis dab ntxwg nyoog yog nyob rau hauv qhov tsis muaj qhov tshwj xeeb alloy.
Lub machining sab yog lwm lub ntiaj teb. Koj xav tias koj tau machined cov ntaub ntawv nyuaj kom txog thaum koj sim tig los yog zeb Stellite 6 nyob rau hauv nws hardened, as-cam khwb cia lub xeev. Nws luag ntawm standard carbide. Peb tau kub hnyiab los ntawm cov cuab yeej ntawm txoj haujlwm tshuab dhos ua ntej hloov mus rau kev teeb tsa nruj, qeeb qeeb, thiab qib siab ntawm carbide. Txawm li cas los xij, nws yog txheej txheem sib tsoo ntau tshaj qhov txiav. Lub hom phiaj yog tshem tawm cov khoom tsis muaj kev ntxhov siab thermal uas tuaj yeem ua rau tawg. Nws qeeb, kim, thiab xav tau ib tus kws kho tshuab uas tau saib xyuas, tsis yog ua haujlwm xwb.
Qhov twg Nws Tiag Tiag (Thiab qhov twg Nws Tsis)
Tsis nco qab daim ntawv qhia. Tus nqi tiag tiag ntawm Stellite 6 yog nyob rau hauv tshwj xeeb, rau txim rau cov xwm txheej. Siv lub rooj vag loj loj hauv cov roj & roj-qhov chaw uas koj muaj kev kub siab kaw, cov khoom yaig, thiab kev caij tsheb kauj vab tas li. Ntawm no, nws ua ke ntawm corrosion kuj (tsis zoo li ib co npib tsib xee alloys, tab sis dlej) thiab tshwj xeeb tsis kam rau nplaum hnav thiab galling yog unmatched. Peb siv nws rau qhov tseem ceeb choke valve tivthaiv raug cov xuab zeb yaig; nws outlasted hardened 17-4PH los ntawm ib qho ntawm tsib. Qhov ntawd yog qhov yeej.
Tab sis nws yog ib qho kev xaiv tsis zoo rau kev cuam tshuam. Kuv nco qab txog qhov project rau pob zeb crusher hnav phaj. Ib tug neeg tau teev cov Stellite 6 overlay. Nws ua tsis tau tejyam kev puas tsuaj - chipping thiab spalling nyob rau hauv rov qab high-zog cuam tshuam. Qhov ntawd yog ib hom kev ua tsis tiav brittle. Peb hloov mus rau cov khoom siv tiv thaiv ntau dua, thiab qhov teeb meem ploj mus. Qhov tseem ceeb yog kuaj xyuas qhov hnav mechanism. Puas yog abrasive zawv zawg? High-temperature hlau-rau-hlau txhuam? Corrosion ntxiv rau lub teeb puas? Stellite 6 yog ci ntsa iab rau thawj ob, nruab nrab rau kev xeb dawb huv, thiab tsis zoo rau qhov hnyav.
Lub Nitty-Gritty ntawm Specifications thiab Tolerances
Koj tsis tuaj yeem xa daim duab kos nrog Cov Khoom Siv: Stellite 6. Qhov no yog thov kom muaj teeb meem. Cov specification yuav tsum nruj dua. Puas yog koj xa mus rau ASTM F75 (tus qauv cam khwb cia)? Dab tsi yog qhov yuav tsum tau hardness range? As-cam khwb cia? Los yog tshuaj annealed thiab laus? Mechanical zog thiab txawm tias hnav tsis kam hloov nrog kev kho cua sov. Rau daim ntawv thov lub nplhaib foob, peb tau kawm txoj kev nyuaj uas qhia txog HRC 40-45 tsis txaus. Peb tau txais cov khoom ntawm HRC 42, tab sis qhov microstructure tsis raug, ua rau ntxov ntxov micro-pitting. Tam sim no, peb teev cov qauv ASTM thiab micrographic xav tau rau kev faib khoom carbide.
Dimensional tolerances rau Stellite 6 ntu xav tau kev kuaj xyuas qhov tseeb. Vim nws qhov nyuaj machining, tuav lub ± 0.0005 kam rau ntawm ib txoj kab uas hla loj tsis yog kim xwb; nws yog feem ntau impractical vim kev ntxhov siab nyem thiab cov txheej txheem sib tsoo. Peb tsim rau kev ua haujlwm, tso cai dav dav qhov twg ua tau thiab qhia qhov tseem ceeb sealing lossis mating nto kom meej. Qee lub sij hawm, nws yog smarter los tsim ib lub stainless hlau substrate nrog ib tug Stellite 6 weld overlay los yog ntxig precisely qhov twg hnav tshwm sim. Qhov no hybrid mus kom ze yog ib qho kev ua si-hloov rau lub tes tsho loj lub twj tso kua mis uas peb tau ua haujlwm, txiav cov nqi thiab lub sijhawm ua haujlwm ntau heev.
Surface finish yog lwm qhov hloov maj mam. Daim iav tiav tsis yog ib txwm zoo tshaj. Rau qee qhov zawv zawg hnav daim ntaub ntawv, kev tswj, me ntsis textured tiav los ntawm kev sib tsoo tuaj yeem pab khaws lubrication. Peb qhia meej Ra, tab sis qee zaum kuj suav nrog ib daim ntawv ntawm qhov kev taw qhia nteg rau cov lus tsa suab. Nws yog cov ntsiab lus me me, kev paub dhau los uas cais ib feem uas ua haujlwm ntawm ib qho uas kav ntev.
Failures thiab Lessons Learned
Kuv qhov tsis nco qab tshaj plaws yog txheej kub shearing hniav. Peb teev cov khoom Stellite 6, peev cam khwb cia, ces precision av. Lawv ua tau zoo nkauj heev...li 20 lub voj voog. Tom qab ntawd, kev puas tsuaj tawg tau nthuav tawm los ntawm lub qhov mounting. Kev soj ntsuam tom qab kev tuag qhia tias qhov teeb meem tsis yog cov khoom siv; nws yog tus tsim. Peb muaj lub kaum ntse ntse sab hauv (qhov kev ntxhov siab concentrator) nyob ib sab ntawm qhov taw tes clamping. Nyob rau hauv ib tug tawv, kuj nkig cov ntaub ntawv, uas yog ib tug puas lawm tos kom tshwm sim. Kev kho yog yooj yim: ib lub vojvoog dav dav hauv kev tsim kho dua tshiab. Zaj lus qhia yog qhov muaj txiaj ntsig: kev tsim qauv rau kev tsim khoom yog qhov tseem ceeb, tab sis nrog cov khoom sib txawv, koj yuav tsum tsim cov khoom coj cwj pwm. Koj tsis tuaj yeem tsuas yog qhov chaw nres nkoj steel tsim.
Lwm zaj lus qhia suav nrog kev muab cov saw hlau pob tshab. Peb ib zaug tau txais qhov chaw uas tau ntsib tag nrho cov seem specs tab sis ua tsis tiav ntxov. Nws muab tawm tus neeg muag khoom tau hloov cov khoom sib xws cobalt kom txuag tau nqi. Yog tsis muaj ntaub ntawv pov thawj thiab ib tug txhim khu kev qha traceable qhov chaw, koj nyob nraum ya dig muag. Tam sim no, peb hais rau cov ntawv pov thawj zeb rau cov hlau tsis huv thiab feem ntau ua qhov chaw kuaj xyuas spectroscopy. Ntseeg, tab sis txheeb xyuas. Qhov no yog vim li cas tsim cov haujlwm nrog cov ntaub ntawv ntev, zoo li tau hais QSY Nrog nws peb lub xyoo caum, tuaj yeem muab kev ntseeg siab ntau dua-lawv muaj lub koob npe nrov los txhawb nqa thoob plaws lawv lub plhaub pwm casting, peev casting, thiab CNC machining cov kev pabcuam, thiab cov khoom siv hloov pauv yog txoj hauv kev ceev kom puas.
Qhov kev sib tw loj tshaj plaws tsis tu ncua yog tus nqi tsim nyog. Stellite 6 yog kim - cov khoom siv raw, tshwj xeeb casting, kev ua haujlwm nyuaj. Koj yuav tsum ua pov thawj nws tus nqi los ntawm tag nrho cov nqi ntawm lub neej: txo qis qis, txo qis kev hloov pauv, nce kev nyab xeeb. Rau ib tug standard industrial valve, nws yog overkill. Rau qhov uas nkag tsis tau rau hauv qab ntawm lub qhov dej tob hauv dej hiav txwv, nws yog qhov kev xaiv nkaus xwb. Ua qhov kev lag luam ntawd, nrog cov ntaub ntawv tiag tiag los ntawm kev sim ua haujlwm, yog ib feem ntawm txoj haujlwm.
Wrapping It Up: Ib Pragmatic Saib
Yog li, dab tsi yog qhov takeaway? Stellite 6 ntu yog cov cuab yeej muaj zog, tab sis lawv tsis yog kev daws teeb meem thoob ntiaj teb. Lawv thov kom muaj kev hwm rau tag nrho cov txheej txheem: los ntawm qhov tseeb hnav mechanism kuaj xyuas, tsim kom haum rau cov yam ntxwv ntawm cov hlau, kom koom tes nrog tus neeg tsim khoom uas nkag siab txog qhov tsis sib xws ntawm cobalt-based alloys los ntawm casting thiab tom qab ua tiav. Nws yog kev sib koom tes ntawm engineering thiab kev tsim khoom.
Tsis txhob raug ntxias los ntawm cov ntaub ntawv cov khoom ntiag tug ib leeg. Xav txog kev sib tsoo, kev kho cua sov, tus nqi ntawm cov khoom seem vim yog cov qauv tsim uas koj tau saib dhau. Pib nrog cov lus qhia meej meej: Peb xav tau cov khoom uas muaj sia nyob X ib puag ncig, nrog Y hom hnav, rau Z cycles. Yog tias cov lus teb taw qhia rau Stellite 6, tom qab ntawd mus nrog qhov muag qhib rau qhov kev tsim khoom tiag. Nws yog ib yam khoom uas muab nqi zog ceev faj, paub txog daim ntawv thov thiab rau txim rau cov kev xav. Nyob rau hauv qhov zoo, ntawm qhov yog, nws tsim nyog txhua lub nyiaj npib thiab txhua qhov mob taub hau me ntsis.
