Material Science-Matching Sheath rau txheej txheem
Tso lus
Qhov tseem ceeb tshaj plaws specs thaum xaiv lub tshuab rhaub cartridge feem ntau yog txoj kab uas hla, qhov ntev, qhov hluav taws xob, thiab wattage. Hauv kev lag luam loj heev, txawm li cas los xij, cov khoom siv ntawm lub tsho sab nrauv feem ntau txiav txim siab seb lub tshuab cua sov puas tuaj yeem raug tshem tawm thiab siv dua lossis yog tias nws dhau los ua ib qho chaw ruaj khov, kim ntawm pwm. Thaum qhov kub ntawm qhov kub ntawm qhov kub siab tshaj 400℃los yog 500-800℃vim qhov siab watt ceev los yog cov cua kub tsis zoo, lub metallurgy ntawm lub sheath hloov los ntawm cov ntsiab lus thib ob mus rau qhov kev txiav txim siab tseem ceeb uas muaj qhov cuam tshuam ncaj qha rau nws kav ntev npaum li cas, nws yooj yim npaum li cas los tswj, thiab cov txheej txheem txhim khu kev qha.
Stainless Hlau 304 yog cov khoom siv zoo tshaj plaws rau cov qauv siv uas ua haujlwm ntawm qhov kub txog li 400 degree, uas yog ib qho ntawm cov yas txhaj tshuaj pwm, ntim tshuab, sealing tuav, thiab cov cua kub cua sov. Hom 304 yog tus nqi heev- zoo, muaj kev tiv thaiv zoo tag nrho hauv cov chaw huv, qhuav, thiab muaj zog txaus los tswj qhov kub nruab nrab. Nws cov ntsiab lus 18-20% chromium tsim ib txheej chromium oxide passive uas tiv thaiv oxidation thiab tshuaj lom me me los ntawm cov yas vapors lossis cov av noo hauv huab cua. Thaum siv nrog rau qhov haum haum (0.05-0.10 mm clearance) thiab tsawg watt ntom (5-10 W / cm²), 304 sheaths tuaj yeem kav ntev li 18 mus rau 36 lub hlis ntawm kev siv tsis tu ncua hauv cov tshuab uas zoo- khaws cia.
Tab sis thaum cov pwm los yog txheej txheem kub dhau 400 degree, los yog thaum daim ntawv thov muaj ntau thermal cycling, vibration, agassive outgassing los ntawm engineering resins, los yog siab sheath kub los ntawm high watt ntom, Stainless hlau 304 sai sai qhia nws txwv . 304 ua softer ntau tshaj 650-700℃poob rau 2% (yield) chav- qhov kub thiab txias), ntsuas nrawm, thiab tsim cov txheej tuab, nkig oxide uas tawg tawm thaum lub caij txias. Qhov kev ntsuas no ua rau lub ntsej muag rougher thiab ua rau muaj kev sib txhuam ntawm cov pwm phab ntsa, uas tuaj yeem ua rau galling thiab ua rau nws nyuaj los yog tsis yooj yim sua kom rho tawm lub rhaub yam tsis muaj kev puas tsuaj rau cov kab noj hniav los ntawm kev drilling lossis EDM. Nyob rau hauv qhov chaw uas tej yam co co heev, xws li siab - ceev presses, ultrasonic vuam, los yog packing kab, repetitive spalling thiab buildup ntawm oxide ua kom qaug zog tawg thiab txiav lub neej ntawm ib nrab.
Hauv cov xwm txheej hnyav no, nws yuav tsum hloov mus rau siab dua -nickel alloys xws li Incoloy 800, Incoloy 825, lossis Stainless Steel 310S. Incoloy 800 yog npib tsib xee- hlau-chromium alloy uas muaj 30-35% npib tsib xee. Nws muaj lub zog zoo ntawm qhov kub thiab txias thiab tsim kom muaj kev ruaj khov, nruj nruj chromia- alumina oxide nplai uas tsis nti tawm txawm tias tom qab ntau txhiab cua sov mus txog 1100℃. Vim tias nws yog qhov zoo dua ntawm kev tiv thaiv carburisation, nitridation, thiab oxidation sab hauv los ntawm cov khoom yas decomposition, nws yog qhov zoo tshaj plaws rau kub - khiav manifolds, siab - kub tuag, los yog extrusion daim ntaub ntawv. Incoloy 825 muaj molybdenum thiab tooj liab ntxiv rau nws, uas ua rau nws tsis tshua muaj kev cuam tshuam hauv cov tshuaj chloride- nplua nuj lossis acidic me ntsis. Stainless hlau 310S (25% chromium, 20% npib tsib xee) yog qhov zoo ntawm kev tiv thaiv oxidation hauv qhov chaw oxidising ntshiab mus txog 1150 degree. Nws yog feem ntau siv thaum tus nqi yog qhov teeb meem tab sis qhov kub thiab txias yog qhov tseem ceeb heev.
Cov ntaub ntawv sheath kuj muaj qhov cuam tshuam loj npaum li cas qhov haum ua haujlwm thiab qhov zoo li cas tau npaj. Machining burrs, av, los yog tawm - ntawm - puag ncig bores feem ntau yuav tawm cov cim rau ntawm cov hlau softer xws li 304. Cov qhab nia no ua rau muaj kev ntxhov siab uas tuaj yeem ua rau cov kab nrib pleb ntev lossis tawg thaum kub nce lossis siab hauv cov khoom nce. Incoloy 800 yog li 50% muaj zog tshaj 304 ntawm 600 degree, uas ua rau nws nyuaj thiab tiv taus ntau dua rau deformation thiab galling. Qhov no txhais tau hais tias kev tshem tawm nruj dua (0.02-0.05 hli) tuaj yeem siv yam tsis muaj kev pheej hmoo ntawm kev khi lossis crushing thaum lub sijhawm teeb tsa lossis ua haujlwm. Qhov kev sib tw nruj no txo qis qhov sib txawv ntawm qhov sib txawv ntawm lub plhaub thiab cov pwm, txo qhov kub hauv cov xov hlau, thiab ua rau lub tshuab cua sov ntev dua.
Hauv cov chaw tshwj xeeb xws li chav huv huv, kev tsim cov khoom siv hluav taws xob, kev kho mob molding, kev ua zaub mov thiab tshuaj, lossis ultra-siab- daim ntaub ntawv purity, muaj ntau cov ntaub ntawv pov thawj. Lub tshuab rhaub cartridge yuav tsum tsis txhob hnov qab nrog cov tshuaj, tsim cov khoom, lossis cia cov pa tawm. Txhawm rau kom cov khoom tsis txhob daig thiab ua kom huv si yooj yim dua, sheaths feem ntau hais kom muaj electropolished lossis iav tiav (Ra<0.4 μm). 316L stainless steel (low-carbon for better weldability and corrosion resistance) or Incoloy 800 with high-purity surface treatment are common for these situations. In very acidic, etchant, solvent, or high-purity gas conditions, titanium grade 2, Hastelloy C-276, or fluoropolymer-sheathed designs may be needed to keep things from getting dirty or corroding.
Thaum kawg, txuam sheath metallurgy rau cov txheej txheem yog hais txog kev paub txog tag nrho cov kev khiav hauj lwm ib puag ncig, tsis tsuas yog qhov kub ntawm qhov uas nws ua hauj lwm. Cov ntsiab lus tseem ceeb yog: - Qhov kub siab tshaj plaws uas lub plhaub saum npoo tau kwv yees kom ncav cuag (feem ntau yog 100–300℃saum cov pwm kub). - Corrosive vapors, chlorides, halogens, los yog resins uas yog outgassing . - Ntau npaum li cas thiab qhov phem cua kub caij tsheb kauj vab thiab kev vibration yog li cas . - Cov khoom siv, thiab cov khoom siv ntawm cov mould tiav nto . - Kev huv huv, kev sib kis, lossis kev cai los ntawm FDA lossis USP Class VI.
Txawm hais tias koj qhia qhov voltage, wattage, thiab haum zoo npaum li cas, lub tshuab cua sov cartridge nrog cov ntaub qhwv tsis zoo tuaj yeem ntes, tawg, paug cov khoom, lossis ua tsis tau sai. Ntawm qhov tod tes, xaiv cov hlau zoo-304 rau kev siv ib txwm, Incoloy 800/825 rau qhov kub thiab txias los yog hnyav heev-ua kom lub rhaub dej nyob twj ywm detachable, txhim khu kev qha, thiab tsis muaj kab mob rau nws tag nrho lub neej. Hauv siab - tus nqi tsim khoom thaum lub sijhawm poob qis thiab qhov zoo yog qhov tseem ceeb, kev siv nyiaj ntawm txoj cai sheath metallurgy tiv thaiv ob lub rhaub thiab qhov zoo ntawm cov khoom ua. Qhov no hloov qhov tsis muaj peev xwm txuas mus rau lub cuab tam mus ntev.
