Thaum ib tug hais txog a Stellite bushing, thawj yam uas feem ntau los rau hauv siab yog 'ib qho nyuaj heev, hnav-tiv taus ib feem.' Qhov ntawd tsis yog qhov yuam kev, tab sis nws yog qhov yooj yim uas tuaj yeem ua rau raug nqi yuam kev hauv kev qhia tshwj xeeb. Kuv tau pom tej yaam num uas tus tsim hu rau ib tug generic Stellite 6 bushing vim hais tias cov spec ntawv hais tias 'zoo abrasion resistance,' tsuas yog kom nws gall hnyav heev nyob rau hauv high-load, low-speed teb daim ntawv thov. Qhov tseeb yog, Stellite tsis yog ib qho khoom siv; Nws yog tsev neeg ntawm cobalt-chromium alloys, thiab kev xaiv ntawm, hais tias, Stellite 6, 12, los yog 21 rau koj bushing nyob ntawm seb koj tab tom sib ntaus sib tua dawb huv puas, abrasive yaig, hlau-rau-hlau hnav, los yog ua ke nrog corrosion. Tau txais qhov tsis ncaj ncees lawm txhais tau tias ua tsis tiav ntxov, thiab kuv tau rub kuv cov feem ntawm cov bushings seized los ua pov thawj nws.
Kev xaiv cov khoom tsis yog ib qho checkbox xwb
Thaum ntxov ntawm kuv lub sijhawm ua haujlwm nrog cov khoom no, kuv tau kawm txoj hauv kev nyuaj uas xaj a Stellite bushing zoo li kev xaj tsheb - koj xav tau cov ntsiab lus ntxiv. Peb muaj ib daim ntawv thov valve rau cov neeg siv khoom, tuav cov slurry nrog cov khoom zoo. Kev pib khiav siv bushings ua los ntawm tus qauv cobalt-chromium-tungsten alloy. Lawv hnav, tab sis tsis dramatically. Qhov teeb meem yog mating ncej, uas tau qhab nia. Cov hnav tsis yog symmetrical; nws tau tsim ib qho qauv uas ua rau muaj kev vibration. Kev ua tsis tiav tsis yog lub bushing kev puas tsuaj loj; nws yog tag nrho lub rooj sib txoos ua tau degrading tshaj ob peb puas teev. Peb yuav tsum rov qab mus saib cov alloy cov qauv carbide thiab hardness piv rau cov khoom siv ncej. Nws muab tawm tias peb xav tau qib nrog ntau dua ntawm cov carbides nyuaj rau qhov nruab nrab abrasive, txawm tias qib generic yog rau kev puas tsuaj.
Qhov no yog qhov chaw ua haujlwm nrog lub chaw tsim khoom thiab lub khw muag khoom uas nkag siab txog qhov teeb meem nuance. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) muaj keeb kwm los nug cov lus nug no. Nrog ntau tshaj 30 xyoo nyob rau hauv casting thiab machining, lawv tau pom zoo li cov xwm txheej zoo sib xws. Lawv cov kev paub nrog plhaub pwm thiab peev casting rau cov alloys tshwj xeeb txhais tau tias lawv tsis yog nchuav hlau xwb; lawv tab tom tswj cov microstructure uas txhais tau tias yog qhov ntawd Stellite bushing yuav ua haujlwm. Kuv nco qab txog kev sib tham nrog lawv pab pawg engineering ib zaug hais txog kev sib koom ua ke rau kev sib tw nyias-walled bushing thiab nws cuam tshuam li cas carbide faib. Qhov ntawd yog theem uas xaiv cov khoom siv tiag tiag.
Lwm lub ntsiab lus feem ntau tsis nco qab yog qhov sib cuam tshuam ntawm txoj kev casting thiab cov khoom kawg. Rau qhov tuab-section, yooj yim-puab bushing, ib tug zoo li qub casting tej zaum yuav zoo. Tab sis rau ib tug complex geometry nrog txawv phab ntsa thicknesses, zoo li ib tug nrog ib tug lubrication raws los yog flanges, qhov sib xws los ntawm kev peev casting txheej txheem yuav yog ib qho tseem ceeb kom tsis txhob shrinkage porosity nyob rau hauv high-stress. Koj tsis tuaj yeem tsuas tshuab qhov flaw tam sim ntawd. QSY lub peev xwm dual hauv ob lub plhaub pwm (zoo rau nruab nrab series, zoo dua saum npoo tiav) thiab peev casting (cov duab nyuaj, tag nrho cov alloys) yog qhov ua tau zoo ntawm no. Nws tso cai rau koj kom phim cov txheej txheem rau ib feem ntawm txoj haujlwm thiab lub xeev kev ntxhov siab, tsis yog nws daim duab xwb.
Machining: Qhov twg zoo Castings tuaj yeem phem
Qhov no yog ib feem uas ua rau machinists sawv thaum hmo ntuj. Koj tau txais ib tug zoo kawg nkaus cam khwb cia Stellite bushing dawb paug, thiab txoj haujlwm yog ib nrab ua tiav ntawm qhov zoo tshaj plaws. Stellite ua haujlwm nyuaj. Ua nruj ua tsiv. Yog tias koj lub cuab yeej txoj kev, nrawm, pub, lossis cov khoom siv tsis raug, koj yuav hlawv los ntawm kev ntxig, qhia txog micro-cracks ntawm qhov chaw, lossis tawm hauv qab tensile stresses uas ua rau cov ntsiab lus tsis ua haujlwm. Kuv tau muab cov khoom pov tseg los ntawm kev ua nruj dhau ntawm qhov kawg dhau, tsim kom muaj qhov zoo nkauj tiav uas zais ib qho kev ua haujlwm-tawv tawv, cuam tshuam txheej txheej.
Lub hom phiaj yog txiav cov khoom, tsis smear nws. Peb tau txiav txim siab los ntawm kev siv cov txheej txheem nruj, cov qib ntse carbide tshwj xeeb rau cov hlau kub kub, thiab txoj cai ntawm tus ntiv tes xoo: lub teeb qhov tob ntawm kev txiav, nruab nrab ceev, thiab cov khoom noj zoo ib yam kom tau raws li cov txheej txheem ua haujlwm hnyav los ntawm kev dhau dhau los. Txias yog lwm qhov kev sib cav. Qee cov lus cog tseg los ntawm dej nyab kom txias kom sov. Lwm tus, kuv tus kheej suav nrog, feem ntau nyiam huab cua tawg rau Stellite, vim tias nws zam lub thermal shock ntawm coolant uas tuaj yeem txhawb kev tawg, thiab nws tshem tawm cov chips zoo los tiv thaiv kev txiav. Nws yog qhov sib npaug, thiab koj tsim kev xav rau nws. Lub khw CNC machining kev paub, zoo li QSY qhov tseem ceeb, yog qhov tseem ceeb ntawm no. Nws tsis yog tsuas yog muaj cov tshuab; nws yog hais txog cov pab pawg neeg kev paub txog yuav ua li cas khiav lawv rau cov tawv tawv alloys.
Tom qab machining, haum thiab tiav yog txhua yam. Lub bushing tsis yog hnav thaiv; nws yog precision interface. Tus ID kam rau ua, nto tiav (Ra tus nqi), thiab txhua qhov honing lossis polishing tuaj yeem ua qhov sib txawv loj hauv kev pib khiav thiab lubrication tuav. Peb ib zaug muaj teeb meem nrog bushings seizing thaum pib commissioning ntawm lub twj tso kua mis. Tom qab txiav tawm kev sib dhos thiab lubrication, peb saib cov bushings lawv tus kheej. Tus ID tiav yog du heev - nws tsis tuav cov roj zaj duab xis kom zoo thaum lub sijhawm pib qis qis. Lub teeb cross-hatch honing daws nws. Nws yog ib qho kev nthuav dav me me nrog rau qhov tshwm sim loj heev.
Cov Ntsiab Lus Tshwj Xeeb Alloy thiab Real-World Trade-offs
Stellite zaum nyob rau hauv qhov tshwj xeeb alloy qeb vim yog vim li cas. Nws kim. Lub hauv paus cobalt, cov tswv yim zoo xws li tungsten lossis molybdenum, qhov precision casting thiab nyuaj machining - nws tag nrho ntxiv. Yog li, koj tsis qhia a Stellite bushing rau txhua daim ntawv thov. Kev suav yog tag nrho tus nqi ntawm cov tswv cuab: tus nqi ib feem piv rau tus nqi ntawm kev poob qis, hloov kev ua haujlwm, thiab kev puas tsuaj los ntawm kev ua tsis tiav. Nyob rau hauv lub twj tso kua mis tseem ceeb ntawm qhov chaw tawm sab nraud, Stellite bushing yog kev pov hwm pheej yig. Nyob rau hauv ib qho tseem ceeb tsawg, yooj yim siv conveyor cov menyuam, cov hlau tawv tawv lossis txawm tias bronze bushing yuav yog qhov kev xaiv pheej yig dua hauv nws lub neej.
Qhov no yog qhov chaw ua haujlwm puv ntoob ntawm tus khub ua qhov tseem ceeb. Ib lub tuam txhab uas muab ob qho tib si casting ntawm cov hlau thiab cov machining tom ntej, zoo li cov kev pabcuam uas tau teev tseg los ntawm QSY, tuaj yeem muab kev txheeb xyuas tus nqi ntau dua. Lawv tuaj yeem qhia yog tias qhov ze-net-puab casting tuaj yeem txo cov sijhawm ua haujlwm, lossis yog tias cov hlau sib txawv me ntsis hauv tsev neeg yuav yooj yim dua rau tshuab nrog tsuas yog kev lag luam me me ntawm cov khoom siv rau qhov kev siv tshwj xeeb. Lawv tab tom saib tag nrho cov kev tsim khoom lag luam, tsis yog muag koj lub casting.
Kuv nco txog ib qhov project uas peb tab tom saib lub bushing rau lub siab kub agitator ncej. Thawj qhov kev xav yog Stellite 6. Txawm li cas los xij, tom qab sib tham txog kev ua haujlwm ib puag ncig-lub voj voog cua sov mus txog 750 ° C, muaj cov sulfur compounds-qhov kev pom zoo tau hloov mus rau cov nickel-based alloy lawv kuj tau ua haujlwm nrog. Nws tau zoo dua kub corrosion kuj rau qhov chaw tshwj xeeb, txawm tias nws chav tsev kub hnav tsis kam qis dua. Lub bushing nyob rau hauv lub cub tawg, tsis yog ib daim ntawv qhia. Cov khoom siv yog los ntawm kev nkag siab txog daim ntawv thov, tsis yog cov khoom siv lub npe.
Failures and Lessons: Cov Dab Neeg Unpolished
Tsis yog txhua zaj dab neeg muaj qhov xaus huv si. Peb sim thawb cov kev txwv ib zaug nrog monolithic Stellite bushing nyob rau hauv qhov tsis tshua muaj siab load, cuam tshuam-nrhiav pob khawm taw tes. Txoj kev xav yog nws lub zog compressive thiab hardness yuav lis nws. Nws ua, ib pliag. Ces nws tawg. Tsis hnav tawm - tawg. Zaj lus qhia yog hais tias lub hauv paus ntawm brittleness ntawm high-hardness alloy tsis tuaj yeem tuav qhov kev poob siab. Peb daws nws los ntawm kev rov tsim kho lub rooj sib txoos kom siv lub tes tsho Stellite coj mus rau hauv ib qho nyuaj, ductile steel vaj tse, cia txhua yam khoom ua qhov zoo tshaj plaws ntawm. Lub bushing lub luag hauj lwm tau rov hais dua los ntawm ib qho kev tivthaiv rau lub ntsej muag ntshiab.
Lwm qhov pitfall yog ignoring lub mating nto. Muab ib qho super-nyuaj Stellite bushing tiv thaiv me ntsis steel ncej yog ib daim ntawv qhia rau kev rhuav tshem cov ncej. Koj feem ntau yuav tsum tau hloov kho cov khoom siv los yog nws txoj kev kho saum npoo (nyuaj chrome, thermal spray) los tsim ib khub sib xws. Nws yog qhov system. Kuv tau pom zoo nkauj ua bushings rov qab los nyob rau hauv warranty, tsuas yog nrhiav tau qhov tsis ua hauj lwm yog tshwm sim los ntawm ib tug mos mos, tau qhab nia ncej ua raws li ib tug ntaub ntawv tiv thaiv bushing ID.
Cov kev paub dhau los no ua rau pom kev pom ntau dua. Koj pib saib lub bushing tsis yog cov khoom tawm ntawm lub txee, tab sis raws li qhov tsim interface hauv ib qho system. Cov lus nug ntau ntxiv: Tus nqi PV (Pressure-Velocity) yog dab tsi? Puas yog lubrication ciam teb, sib xyaw, lossis puv-film? Puas muaj ntug-loading tej yam kev mob? Cov lus teb qhia txog kev xaiv cov alloy, txheej txheem casting rau kev ncaj ncees, machining specs rau kev ua tiav thiab kev ua siab ntev, thiab kev soj ntsuam zaum kawg.
Wrapping It Up: Tshaj li daim ntawv Spec
Yog li, dab tsi yog qhov takeaway ntawm Stellite bushings? Nws yog tias tus nqi tsis nyob hauv daim hlau uas koj tau txais. Nws yog nyob rau hauv cov saw ntawm kev txiav txim siab thiab kev txawj ntse uas tsim ib feem haum rau ib tug tshwj xeeb, feem ntau rau txim, lub hom phiaj. Nws pib nrog kev ntsuam xyuas ncaj ncees ntawm hom kev ua tsis tiav, txav los ntawm kev sib koom tes ntawm cov khoom siv thiab kev xaiv cov txheej txheem nrog tus neeg muag khoom paub, yuav tsum tau ua kom zoo zoo, thiab xav kom muaj kev pom dav dav ntawm qhov nws yuav ua haujlwm li cas.
Cov neeg muag khoom uas tau nyob hauv trench, zoo li QSY nrog lawv lub xyoo caum hauv casting thiab machining cov ntaub ntawv no, dhau los ua ntau tshaj cov neeg muag khoom. Lawv dhau los ua tus kws pab tswv yim. Tej zaum lawv tau pom ntau pua qhov txawv ntawm koj qhov teeb meem. Lawv lub luag haujlwm yog los txhais cov kev ua haujlwm uas yuav tsum tau ua - peb xav tau qhov no kom ntev dua hauv cov kua zaub kub, abrasive, corrosive - rau hauv cov khoom tsim tau, txhim khu kev qha. Qhov kev txhais lus ntawd yog qhov tseeb engineering tshwm sim, ntev ua ntej thawj pwm tsim.
Thaum kawg, qhia txog Stellite bushing yog ib nqe lus hais tias lub sijhawm poob qis yog qhov tsim nyog thiab kev ua tau zoo yog qhov tseem ceeb. Tau txais nws txoj cai yog ib qho kev tawm dag zog hauv kev siv metallurgy, kev tsim khoom, thiab kev siv tshuab. Ua yuam kev yog ib zaj lus qhia kim. Qhov sib txawv ntawm ob feem ntau yog nyob rau hauv qhov tob ntawm kev sib tham koj muaj nrog koj lub rooj cob qhia, ua ntej qhov kev txiav txim yuav puas tau txiav.
