Thaum koj hnov 'Incoloy 825', thawj qhov uas feem ntau los rau hauv lub siab yog 'corrosion resistance' - thiab qhov ntawd yog, tab sis nws kuj yog me ntsis ntawm ntxiab. Nyob rau hauv lub tshav pob, tshwj xeeb tshaj yog rau cov khw zoo li peb li uas tuav ob qho tib si casting thiab precision machining, alloy lub koob npe nrov yuav ua rau oversimplification. Nws tsis yog ib lub mos txwv khawv koob rau kev pabcuam qaub lossis nitric acid; nws tus cwj pwm thaum lub sij hawm tsim khoom, los ntawm lub hauv pem teb foundry mus rau lub tshuab CNC, txhais nws cov nqi tseeb. Kuv tau pom ntau tus qauv qhia nws los ntawm rote, tsis xav txog qhov tseeb fabrication. Lub siab nickel-chromium-molybdenum-tooj liab muaj pes tsawg leeg muab nws zoo heev pitting thiab kev nyuaj siab corrosion cracking kuj, tab sis tib daim ntawv qhia ua rau nws ib tug txawv tsiaj nyaum ua hauj lwm nrog piv rau tus qauv 316L. Nws yog qhov sib txawv ntawm daim ntawv teev cov ntaub ntawv thiab lub rooj cob qhia uas kuv pom qhov tseem ceeb tshaj plaws.
Los ntawm Melt rau Pwm: Casting Incoloy 825 tsis ncaj nraim
Peb qhov kev paub txog kev tsim, tshwj xeeb nrog lub plhaub pwm thiab peev txheej txheej txheem peb khiav ntawm Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), tau qhia peb tias nickel alloys nyiam lus 825 thov kev hwm los ntawm thawj kauj ruam. Kev ua txhaum cai yog qhov tseem ceeb. Koj tsis tuaj yeem them taus cov ntsiab lus tramp; txawm me ntsis txhuas los yog sulfur paug tuaj yeem ua rau kub ua haujlwm. Peb tswj hwm cov txheej txheem pleev xim nruj, feem ntau siv cov qib siab dua rov qab thiab cov khoom siv nkauj xwb los tswj cov tshuaj lom neeg kom nruj. Lub hom phiaj yog ntaus qhov chaw qab zib: Ni ~ 42%, Cr ~ 21.5%, Mo ~ 3%, Cu ~ 2.2%, thiab stabilizing Ti ntxiv. Nco nws, thiab cov khoom corrosion uas koj them rau tej zaum yuav tsis nyob ntawd.
Lub solidification yam ntxwv yog lwm qhov taw tes. Nws tsis yog cov kua dej ntau tshaj thaum nchuav. Hauv kev nqis peev casting, peb yuav tsum tau kho qhov kub thiab txias ntawm peb lub plhaub ceramic thiab tweak pouring tsis txwv tsis pub mistruns hauv nyias ntu lossis kua muag kub hauv qhov hnyav dua. Nws yog ib qho kev ntsuas ntsuas - kub dhau, thiab koj yuav muaj kev pheej hmoo ntau dhau ntawm cov qoob loo loj hlob thiab micro-shrinkage; txias heev, thiab qhov sau tsis tiav. Qhov no tsis yog ib yam uas koj kawm los ntawm phau ntawv; nws tau sau los ntawm kev sim thiab, qhov tseeb, qee qhov khoom siv kim ntau xyoo. Peb ib zaug muaj ib pawg ntawm lub cev valve uas pom tias micro-porosity nyob rau hauv kev tshuaj xyuas hluav taws xob, taug qab rov qab mus rau qhov ntsuas kub me ntsis uas zoo li zoo rau carbon hlau tab sis tsuas yog hla kab rau 825.
Kev kho cua sov tom qab cam khwb cia yog tsis sib tham. Cov qauv as-casting yog inhomogeneous thiab loaded nrog residual stresses. Lub voj voog kev daws teeb meem zoo, feem ntau nyob ib puag ncig ° F ua raws li qhov nrawm nrawm, yog qhov tseem ceeb rau kev yaj cov theem nrab thiab coj tawm cov qauv austenitic. Hla qhov no lossis tau txais qhov cub cua tsis raug (oxidizing vs. tiv thaiv) tuaj yeem tawm ntawm qhov tsis zoo rau kev tawm tsam intergranular tom qab. Peb tau tsim cov qauv ntawm peb lub tshuab hluav taws xob thiab siv cov kab kos rau cov haujlwm tseem ceeb - nws yog tib txoj hauv kev los lav qhov sib xws.
Lub Taub Hau Machining: Qhov Kev Xav Tau Raws Li Txoj Cai
Yog tias casting nws xav tau kev saib xyuas, machining lus 825 yog qhov kev sib tw tiag tiag pib rau lub khw CNC. Qhov no yog qhov uas peb integrated qauv ntawm QSY qhia tau tias nws muaj nqis. Koj tsis tuaj yeem cuam tshuam tus txheej txheem stainless hlau qhov kev pab cuam ntawm nws. Lub alloy ua hauj lwm-hardens sai thiab aggressively. Ib me ntsis npub ntxig los yog tus nqi pub tsis txaus yuav tsim cov txheej tawv tawv hauv qab qhov txiav, ua rau lub caij ntuj no dhau ntawm cov cuab yeej thiab muaj peev xwm cuam tshuam qhov kev ncaj ncees ntawm qhov chaw.
Kev xaiv cuab yeej yog txhua yam. Peb tau tsiv mus yuav luag tshwj xeeb rau qib premium-qib carbide substrates nrog cov txheej tshwj xeeb (AlTiN-raws li feem ntau ua haujlwm zoo) rau roughing thiab xov. Qhov zoo rake geometries yog ib qho yuav tsum tau txo qis txiav quab yuam thiab ua haujlwm hnyav. Coolant tsis yog ua kom txias xwb; nws yog cov roj nplua nyeem los pab cov nti swb. Peb siv high-pressure, los ntawm-tool coolant systems los xyuas kom meej tias nws tau txais txoj cai mus rau lub txiav ntug. Kuv nco ntsoov ib txoj hauj lwm machining loj lub twj tso kua mis qhov chaw uas peb pib siv peb cov qauv tsis rau duplex stainless. Peb tau dhau los ntawm peb qhov kev ntxig ntxig rau hauv ib qho kev ua haujlwm. Qhov kho? Poob SFM los ntawm kwv yees li 25%, nce qhov pub rau ib tus hniav, thiab xyuas kom meej meej rigidity hauv kev teeb tsa. Mam li nco dheev, cov ntawv ntxig tau ua haujlwm tag nrho, thiab qhov ua tiav ntawm qhov kawg tau zoo tuaj.
Drilling thiab tapping yog qhov mob tshwj xeeb. Peck drilling yog qhov yuav tsum tau ua, nrog rau kev thim rov qab kom tshem cov chips thiab rhuav tshem lub voj voog ua haujlwm. Rau tapping, peb feem ntau hais kom muab kauv-fluted kais dej tsim rau cov ntaub ntawv tawv thiab siv synchronous pub rau CNC kom tsis txhob nti vuam. Nws yog qeeb dua, kev ua haujlwm ntau dua. Kev suav nyiaj txiag hloov los ntawm maximizing tshuab uptime mus rau maximizing cuab tam lub neej thiab ib feem zoo. Rushing nws yog ib txoj hauv kev kom poob nyiaj ntawm cov khoom seem thiab rhuav tshem cov cuab yeej.
Vuam thiab Fabrication: Qhov Sib Koom Sib Koom
Thaum peb tseem ceeb ntawm https://www.tsingtaocnc.com yog casting thiab machining, peb nquag muab cov khoom uas yuav tsum tau muab kev koom ua ke rau hauv loj welded lug. Yog li, kev nkag siab weldability yog ib feem ntawm kev pabcuam. lus 825 yog suav tias yog weldable, tab sis nrog loj caveats. Qhov tseem ceeb yog tiv thaiv carbide nag lossis daus nyob rau hauv tshav kub-cuam tshuam cheeb tsam (HAZ).
Peb ib txwm pom zoo kom siv cov khoom sib xyaw ua ke, xws li ERNiFeCr-1 lossis ENiFeCr-1 electrodes. Kev kub ua ntej tsis yog feem ntau yuav tsum tau, tab sis interpass kub tswj yog qhov tseem ceeb - ua kom nws qis dua 150 ° C pab. Qhov yuam kev loj tshaj plaws uas peb tau pom cov neeg siv khoom yog siv tib cov txheej txheem kev siv hluav taws xob uas lawv siv rau cov pa roj carbon steel. Qhov ntawd yog txoj hauv kev uas tau lees paub los tsim kom muaj qhov dav, sensitized HAZ. Tsawg cua sov input, stringer hlaws dai, thiab ceev txias yog cov phooj ywg ntawm 825 vuam. Kev kho cua sov tom qab vuam tsis yog qhov tshwj tsis yog tias koj yuav tsum tau txo qhov kev ntxhov siab rau qhov kev ruaj ntseg hauv kev pabcuam hnyav, tab sis yog tias koj ua, nws rov qab mus rau qhov kev daws teeb meem anneal.
Ib qho teeb meem tswv yim yog qhov sib txawv ntawm vuam. Kev koom nrog 825 rau carbon steel yog ib qho rau cov khoom siv clad lossis nozzles. Ntawm no, koj xav tau ib txheej buttering, feem ntau nrog cov nickel alloy muab tub lim, txhawm rau tiv thaiv cov pa roj carbon monoxide los ntawm cov hlau mus rau 825, uas tuaj yeem tsim ib cheeb tsam nkig. Nws yog ib qho kev nthuav dav uas yooj yim rau kev saib dhau ntawm daim duab tab sis kev puas tsuaj loj hauv kev pabcuam.
Kev hloov khoom siv thiab kaw qhov ntxiab txaus
Nyob rau hauv cov nqi-rhiab heev tej yaam num, yeej ib txwm siab los xav txog lwm txoj. Qee zaum, 316L nrog ntxiv Mo yog pom zoo, lossis alloy 20. Qhov no yog qhov kev xaiv cov khoom tau txais tiag. Rau peb, nws tsis yog hais txog chemistry; nws yog hais txog lub hnab ntawv ua haujlwm.
Alloy 20 muaj cov tshuaj sulfuric acid zoo dua tab sis tsis muaj zog nyob rau hauv ib puag ncig chloride li lus 825. Hastelloy C-276 zoo tshaj hauv oxidizing chlorides tab sis los ntawm tus nqi ntau dua. Qhov kev txiav txim siab matrix suav nrog qhov tshwj xeeb ion concentration, kub, pH, thiab muaj cov oxidizing cov neeg ua haujlwm. Peb tau raug coj mus rau qhov uas ua tsis tau tiav thaum ntxov vim tias ib tug neeg tau hloov cov hlau zoo sib xws yam tsis muaj kev nkag siab zoo ntawm qhov chaw pabcuam - feem ntau yog cov dej txias uas muaj cov tshuaj chlorides npaj txhij los yog cov txheej txheem ntws nrog cov fluorides uas 825 ua haujlwm zoo dua.
Peb lub luag haujlwm feem ntau dhau los ua kev sab laj. Tus neeg siv khoom tuaj yeem xa peb cov spec rau 825 feem. Los ntawm kev sib tham txog daim ntawv thov tiag tiag - qhov kub thiab txias, kev tshaj tawm, lub voj voog siab - qee zaum peb tuaj yeem lees paub qhov kev xaiv lossis, qee zaus, qhia txog cov khoom siv uas siv nyiaj ntau dua yog tias ib puag ncig me me. Tab sis feem ntau tsis yog, yog tias tus spec hu rau 825, muaj qhov zoo, hnyav rau nws. Hloov qhov muag tsis pom kev yog txoj hauv kev nrawm mus rau qhov tsis ua haujlwm.
Quality Assurance: Daim Ntawv Trail yog ib feem ntawm cov khoom
Nrog rau cov khoom zoo li no, daim ntawv pov thawj ntawm kev sib raug zoo tsis yog ib qho qauv; nws yog ib qho khoom xa tuaj. Peb qhov chaw peb lus 825 los ntawm cov mills muaj npe nrov thiab feem ntau ua cov ntawv pov thawj thib ob. Ib qho kev coj ua rau cov khoom tseem ceeb yog xa daim coupon los ntawm tib lub tshav kub mus rau lwm qhov chaw kuaj mob rau tag nrho cov ntub dej chemistry tsom xam. Vim li cas? Vim tias cov ntawv pov thawj zeb feem ntau yog los ntawm kev tsom xam ladle. Cov khoom chemistry kawg tuaj yeem hloov me ntsis, thiab rau 825, me ntsis hauv Ti lossis C cov ntsiab lus tuaj yeem muaj teeb meem.
NDT tseem nce ntxiv. Rau castings, peb niaj hnub ua dye penetrant kuaj rau qhov tsis xws luag. Rau cov khoom siv siab, kev kuaj hluav taws xob yog tus qauv. Cov chaw machined feem ntau raug tshuaj xyuas rau kev ua haujlwm-hardening lossis tearing. Qhov kev nruj QA no tshwm sim los ntawm qhov tseeb tias cov khoom no feem ntau nkag mus rau hauv cov tshuab uas tsis ua haujlwm tsis yog qhov kev xaiv - cov khoom siv hauv qab dej hiav txwv, cov kab ua tshuaj lom neeg, cov tshuaj tua kab mob. Tus nqi ntawm qhov tsis ua haujlwm hauv thaj chaw dwarfs tus nqi ntawm kev kuaj xyuas ua ntej.
Nws yog qhov kawg-siv kev paub uas ua rau peb cov txheej txheem tag nrho. Los ntawm lub caij no lus 825 Tshuag tuaj txog ntawm peb lub chaw nyob hauv Qingdao, mus rau qhov kawg crating ntawm ib tug tiav lawm, soj ntsuam valve lub cev los yog lub twj tso kua mis impeller, txhua kauj ruam yog tswj los ntawm kev nkag siab tias peb tsis yog shaping hlau; peb tab tom muab kev thaiv kev tiv thaiv qee qhov kev lag luam corrosive tshaj plaws nyob rau hauv lub ntiaj teb. Lub luag haujlwm ntawd hais txog kev nrawm, kev saib xyuas, thiab qee zaus kev ntxhov siab uas los nrog kev ua haujlwm nrog cov khoom muaj peev xwm tseem xav tau.
