Thaum cov neeg feem coob hnov 'stainless steel precision casting', lawv pom qhov tsis muaj qhov tsis zoo, ci ntsa iab ncaj qha tawm ntawm daim ntawv qhia. Qhov ntawd yog thawj qhov kev xav tsis zoo. Qhov tseeb yog tias 'precision' ntawm no yog ib lo lus txheeb ze, kev sib tham tas li ntawm tus qauv CAD zoo tagnrho thiab cov tawv nqaij tawv ntawm cov hlau molten. Nws tsis yog hais txog nruj tolerances; Nws yog hais txog kev tswj cov distortion, kwv yees shrinkage rau txhua qib tshwj xeeb ntawm stainless, thiab paub qhov twg nto tiav yog ua tiav 'raws li-cam khwb cia' piv rau dab tsi xav tau tom qab machining. Kuv tau pom ntau tus qauv tsim uas qhia txog kev nqis peev casting rau nws qhov nyuaj tab sis tom qab ntawd thov kev ua haujlwm siab ntawm txhua qhov chaw - nws yog ib txoj hauv kev kom tshuab nyiaj txiag. Qhov tseeb kos duab nyob hauv kev paub txog dab tsi cov txheej txheem tuaj yeem muab rau koj ib txwm muaj thiab qhov twg koj yuav tsum cuam tshuam kiag li.
Lub hauv paus ntawm cov txheej txheem: Nws yog txhua yam hais txog lub plhaub
Txhua yam hinges ntawm lub plhaub ceramic. Ntau tus neeg tuaj tshiab tuaj yeem xav tias cov hlau yog lub hnub qub, tab sis lub plhaub yog theem, tus thawj coj, thiab tus tsim khaub ncaws hnav tag nrho hauv ib qho. Lub plhaub tsis muaj zog txhais tau hais tias qhov dej ntws los yog qhov fin; lub plhaub tsis sib xws ua rau cov phab ntsa tsis sib xws. Peb siv sijhawm ib hnub, qee lub lis piam, tsuas yog nyob rau ntawm slurry formulation thiab stuccoing txheej txheem. Rau lub twj tso kua mis impeller tseem ceeb hauv 316L, piv txwv li, peb yuav siv lub tsho fused silica thawj lub tsho kom zoo dua, tab sis hloov mus rau zircon rau lub tsho tiv no rau nws cov refractoriness ntau dua. Nws yog cov kev xaiv no, feem ntau pom tsis pom hauv qhov kawg, uas txiav txim siab ua tiav lossis ib lub vaj uas muaj cov khoom seem.
Kev tswj kub thaum lub sij hawm dewaxing yog lwm tus neeg tua neeg uas ntsiag to. Heev ceev ceev, thiab lub plhaub tawg los ntawm expanding ciab. qeeb dhau, thiab koj tawm cov seem uas tig mus rau carbon inclusions thaum lub ncuav. Kuv nco qab ib pawg rau marine haum qhov twg peb muaj qhov cub me me calibration drift - tsuas yog 15 degrees Celsius tshaj spec. Qhov tshwm sim tsis yog tam sim ntawd ua tsis tiav; cov plhaub ntsia zoo. Tab sis thaum lub sij hawm nchuav, cov micro-cracks tso cai rau cov hlau nkag mus, tsim ib qho ntxhib, tsis tuaj yeem sab hauv qhov chaw uas tsis tuaj yeem kuaj pom kom txog thaum thawj lub tshuab ua tiav. Qhov ntawd yog ib zaj lus qhia kim heev hauv kev ntseeg siab, tab sis txheeb xyuas, txhua qhov kev ntsuas.
Thiab ces muaj qhov burnout. Nws tsis yog hais txog melting tawm cov quav ciab xwb. Nws yog hais txog kev hloov cov khoom seem seem mus rau cov hmoov tshauv uas tuaj yeem raug tsav tawm, tawm hauv tsis muaj cov pa roj carbon monoxide rau cov hlau tsis huv. Rau cov qib duplex zoo li 2205, qhov no yog qhov tseem ceeb heev vim tias cov ntsiab lus carbon ncaj qha cuam tshuam rau kev tiv thaiv corrosion. Koj tsis tuaj yeem hlawv nws kub dua; koj ua raws li lub voj voog thermal. Qhov no yog qhov twg ntau xyoo ntawm kev xyaum, zoo li hom tau tsim los ntawm ib lub tuam txhab xws li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), ua qhov txawv. Koj tsim kev xav rau nws. Lawv tsom mus rau lub sij hawm ntev plhaub molding thiab peev casting qhia txog kev paub tob, kev ua haujlwm ntawm cov tsis zoo nkauj tab sis cov kauj ruam tseem ceeb.
Khoom siv tsis yog ib daim ntawv tshwj xeeb xwb
Kev qhia tshwj xeeb stainless hlau zoo li hais tias tsheb-nws tsis muaj qab hau yam tsis muaj hom. 304, 316, 17-4PH, 2205—lawv txhua tus coj cwj pwm txawv txawv nyob rau hauv lub crucible thiab pwm. 304 kuj tau zam txim, tab sis nws qhov shrinkage yog qhov tseem ceeb. 17-4PH, qib nag lossis daus, yog qhov zoo heev rau lub zog-rau-hnyav, tab sis nws yog npau suav phem rau kub tearing yog tias koj lub rooj vag thiab nce siab tsis tau tsim los kom haum rau nws cov qauv solidification. Koj tsis tuaj yeem siv tib lub logic pub rau txhua qhov hlau.
Peb kawm qhov no txoj kev nyuaj nrog ib tug qauv rau ib tug aerospace bracket. Cov ntawv luam tau hu rau 17-4PH hauv H900 mob. Peb cam nws, machined nws, tshav kub-kho nws. Nws dhau qhov ntsuas qhov ntsuas tab sis tsis ua tiav kev tshuaj xyuas ultrasonic. Me me, lub kua muag kub. Qhov teeb meem? Peb cov risers, zoo meej rau 316, tsis tau muab kev taw qhia txaus rau qhov tshwj xeeb alloy. Peb yuav tsum rov qab mus, simulate lub solidification dua nrog cov khoom siv tseeb, thiab rov tsim kho tag nrho cov rooj vag layout. Nws ntxiv peb lub lis piam rau qhov project. Tam sim no, rau tej yam tshiab alloy, tshwj xeeb tshaj yog cov tshwj xeeb alloys zoo li cov nickel-based, peb hais kom khiav ib daim coupon xeem me me ua ntej kom pom tias nws ua tau zoo npaum li cas thiab txo qis hauv peb qhov chaw tsim khoom tshwj xeeb.
Qhov no yog vim li cas kev koom tes nrog ib tug foundry uas tiag tiag to taub metallurgy yog tsis-negotiable. Nws tsis yog tsuas yog melting thiab pouring; Nws yog hais txog kev paub tias rau cov nickel alloy siab, koj yuav tsum tau tswj qhov kub ntawm qhov kub ntawm 30-degree kom tsis txhob muaj kev sib cais, lossis rau qee yam kev siv, koj yuav txawm hais tias qhov sib txawv, ntau qib castable uas ua tau raws li qhov yuav tsum tau ua ntawm kev pheej hmoo qis dua. Lub khw nrog 30 xyoo hauv qhov kev ua si, zoo li QSY, yuav tau ntsib cov khoom siv tshwj xeeb ntawm dab thiab tsim cov kev daws teeb meem rau hauv lawv cov txheej txheem. Koj tuaj yeem pom qhov pom ntawm lawv cov khoom siv ntawm lawv qhov chaw ntawm https://www.tsingtaocnc.com.
Qhov twg Casting Ends thiab Machining pib
Qhov no yog qhov zoo tshaj plaws handoff, thiab nws yog qhov twg ntau qhov project stumble. Tsis muaj stainless hlau precision casting yog tiag tiag net-puab rau qhov chaw ua haujlwm. Muaj ib txwm datum ntsej muag yuav tsum tau machined, threads yuav tsum tau tapping, los yog sealing nto kom tiav. Qhov tseem ceeb yog cov khoom siv nyiaj txiag zoo. Muab cov khoom lag luam ntau dhau ntawm txhua qhov chaw kom muaj kev nyab xeeb, thiab koj nkim nyiaj ntau dhau ntawm cov hlau thiab lub sijhawm ua haujlwm. Muab me me dhau, thiab koj muaj feem cuam tshuam rau ntawm daim tawv nqaij, nthuav tawm qhov muaj peev xwm subsurface porosity.
Qhov zoo tshaj plaws yog koom tes nrog pab pawg machining los ntawm theem tsim. Peb ib txwm tsom los txheeb xyuas qhov cuam tshuam tseem ceeb thaum ntxov-hais tias, lub ntsej muag flange uas sib koom nrog lwm cov khoom lossis cov bore rau cov kabmob. Cov cheeb tsam no tau txais cov phiaj xwm, cov nyiaj tau los sib xws, feem ntau tsuas yog 0.5-1mm. Qhov chaw tsis tseem ceeb tuaj yeem raug tso rau hauv lub xeev li-cam khwb cia, uas, yog tias koj lub plhaub txheej txheem zoo, tuaj yeem ua tiav qhov huv si. Qhov kev sib xyaw ua ke no yog qhov cais cov khoom lag luam los ntawm tus muab kev daws teeb meem. Nws yog qhov tseeb los ntawm QSY qhov kev muab ua ke CNC machining tias lawv ua haujlwm ntawm lub hauv paus ntsiab lus no, tswj cov txheej txheem los ntawm pwm mus rau qhov ua tiav machined, uas tshem tawm cov txheej txheem loj ntawm kev sib txuas lus yuam kev thiab zoo ntiv tes taw.
Kuv nco qab txog qhov project valve lub cev qhov twg qhov pib casting tsim muaj niaj hnub 3mm Tshuag. Tus kws kho tshuab siv 80% ntawm nws lub sijhawm tshem cov hlau los ntawm qhov chaw tsis ua haujlwm. Los ntawm kev rov tsim cov casting ntxiv rau cov khoom siv tsuas yog qhov xav tau rau machining datums thiab cov ntsaws ruaj ruaj tseem ceeb, peb txo qhov hnyav tag nrho los ntawm 18% thiab txiav lub sijhawm ua haujlwm ib nrab. Cov nyiaj khaws cia tau ua yeeb yam. Zaj lus qhia? Precision casting yog ntau npaum li cov neeg txawj ntse rho tawm downstream raws li nws yog hais txog kev tswj ntxiv nyob rau hauv lub foundry.
Qhov Kev Muaj Peev Xwm ntawm Kev Ua Siab ntev thiab Kev Ua tiav
Cov qauv kev lag luam zoo li ISO 8062 muab rau koj ua siab ntev bands, tab sis lawv pib cov ntsiab lus, tsis lav. CT5 kam rau ua ntawm 50mm qhov ntev yog theoretically ± 0.35mm. Tab sis koj tuaj yeem tuav qhov ntawd hla tag nrho pawg, ntawm txhua qhov tshwj xeeb? Tsis zoo li. Cov yam ntxwv ntawm ib txoj kab sib cais yuav muaj ntau qhov sib txawv. Cov phab ntsa nyias yog qhov nyuaj rau tswj tau ntau dua li cov tuab tuab. Qhov kev txiav txim siab tiag tiag yog nyob rau hauv kev paub txog qhov kev tolerances yog kev lag luam (general geometry) thiab qhov twg yog qhov tseem ceeb ( haum, ua haujlwm). Koj sib tham thiab tsom ntsoov rau koj tus txheej txheem tswj hwm ntawm qhov tseem ceeb.
Surface finish yog lwm qhov chaw ripe rau kev nkag siab yuam kev. Ib yam peev casting tuaj yeem ua tiav Ra ntawm 3.2 txog 6.3 micrometers as-cam khwb cia. Qhov ntawd yog qhov zoo, tab sis nws tsis polished. Yog tias koj xav tau Ra 0.8 rau lub foob dynamic, koj yuav xav tau machining lossis polishing. Cov txheej txheem casting tuaj yeem ua rau koj kaw, tab sis nws tsis tuaj yeem ua txuj ci tseem ceeb. Kuv tau muaj cov neeg thov rau daim iav tiav ncaj qha los ntawm pwm. Nws tsis ua haujlwm li ntawd. Koj yuav tsum tau piav qhia txog qhov loj ntawm ceramic grain, qhov sib txuas ntawm thawj lub tsho slurry thiab cov hlau - nws yog qhov txwv lub cev.
Cov qauv tshuaj ntsuam pom pom kuj xav tau qhov tseeb. Dab tsi yog qhov kev lees paub me me ntawm qhov tsis zoo? Ib qho me me ntawm qhov tsis muaj kev ntxhov siab, qhov chaw tsis zoo nkauj tuaj yeem ua tau zoo raws li cov qauv ASTM, tab sis tus neeg siv khoom siv los yog cov khoom siv tshuab tuaj yeem tsis lees paub. Kev teeb tsa cov kev cia siab no ua ntej, nrog rau kev kuaj lub cev yog tias ua tau, yog qhov tseem ceeb heev. Nws yog qhov zoo dua los qhia cov qauv nrog cov qauv zoo nkauj zoo nkauj dua li muaj kev sib cav tom qab 500 daim.
Failures Yog Cov Xib Fwb tiag
Koj tsis kawm precision los ntawm kev txiav txim zoo meej; koj kawm tau los ntawm cov khib nyiab. Peb ib zaug muaj qhov teeb meem rov tshwm sim nrog micro-porosity nyob rau hauv lub hub ntawm lub me me turbine log. Nws dhau X-ray tab sis ua tsis tau raws li kev ntsuas kev ntxhov siab. Peb tweaked txhua yam: pouring temp, plhaub preheat, alloy muaj pes tsawg leeg. Tsis muaj dab tsi ua haujlwm tsis tu ncua. Thaum kawg, nyob rau hauv ib lub sij hawm ntawm kev ntxhov siab, peb saib ntawm tus qauv siv quav ciab nws tus kheej. Lub qhov rooj txhaj tshuaj tau txuas ncaj qha rau ntawm qhov chaw muaj teeb meem, tsim kom muaj qhov chaw hotspot. Los ntawm qhov yooj yim txav ntawm qhov chaw ntawm lub qhov rooj thiab ntxiv qhov txias me me hauv cov pwm ntawm qhov chaw ntawd, peb tau hloov kho lub hauv ntej thiab tshem tawm cov porosity. Qhov teeb meem tsis yog hlau; Nws yog thermal geometry peb tau tsim.
Lwm qhov tsis ua haujlwm classic yog xav tias txhua qhov kev ua haujlwm tom qab yog sib npaug. Peb xa tawm ib pawg ntawm 316 castings rau passivation rau tus neeg muag khoom tshiab. Lawv siv nitric acid da dej, kev xyaum. Tab sis lawv da dej tau kis nrog chlorides los ntawm txoj haujlwm dhau los. Qhov tshwm sim yog ib feem ntawm qhov tsis txaus ntseeg uas ua tsis tau qhov kev ntsuam xyuas ntsev tsuag spectacularly. Lub casting yog suab, tab sis peb cov saw hlau tswj tsis tau. Tam sim no, peb tsim nyog peb cov neeg koom tes ua tiav kom nruj raws li peb tus kheej cov txheej txheem. Qhov kawg-rau-kawg tswj yog, hauv kuv qhov kev xav, lub cim ntawm tus neeg muag khoom paub tab. Nws yog hom kev saib xyuas holistic ib lub tuam txhab tsim dua tshaj 30 xyoo hauv kev lag luam, tswj txhua yam ntawm cov nrum hlau mus rau kab txawv alloys nyob rau hauv ib lub ru tsev.
Yog li, thaum koj saib stainless hlau precision casting, tsis txhob pom qhov kawg geometry. Saib cov slurry tank, cov kab kos ntsuas kub, kev simulation solidification, kev xa mus rau lub tshuab CNC, thiab cov lus qhia nyuaj los ntawm kev ua yuam kev yav dhau los. Lub precision yog khwv tau, tsis muab, los ntawm ib txhiab me me, tswj cov kauj ruam thiab nkag siab tob txog qhov twg cov txheej txheem ntuj muaj peev xwm dag thiab qhov twg lawv yuav tsum nruj me ntsis rau hauv kab. Qhov ntawd yog qhov koj tab tom yuav tiag tiag.
