Material Science: Tsis yog -Kev xaiv Alloy sib tham rau 600℃Cartridge rhaub Ciaj sia taus

Thaum qhov kub nce mus txog 600 degree, qhov kev xaiv ntawm cov ntaub qhwv rau lub tshuab cua sov tsis yog ib lo lus nug ntawm kev nyiam; Nws dhau los ua qhov tseem ceeb uas txiav txim siab seb lub tshuab cua sov puas yuav ua haujlwm ruaj khov lossis ua tsis tau sai thiab puas tsuaj. Ntawm qhov kub thiab txias no, qhov hnyav thermal thiab tshuaj lom neeg ua rau cov pa roj carbon monoxide ua rau qhov kev sim thiab qhia lawv qhov tsis muaj zog. Qhov no txhais tau hais tias yuav tsum tau siv cov khoom siv tshwj xeeb. Txhawm rau xaiv lub tshuab cua sov uas yuav tsis tsuas yog kav ntev, tab sis kuj ua haujlwm zoo rau lub sijhawm ntev, koj yuav tsum paub txog kev tshawb fawb txog kev siv hlau hauv qab 310S stainless hlau thiab npib tsib xee-raws li cov alloys xws li Incoloy.

Qhov Kev Ua Tsis Zoo ntawm Cov Alloys ntawm 600 degree
Txhawm rau nkag siab tias vim li cas cov kev daws teeb meem ib txwm tsis ua haujlwm, koj yuav tsum xub nkag siab tias vim li cas cov khoom siv qib siab xav tau.

304/304L Stainless Hlau: Cov hlau tsis zoo no tsis zoo rau lub sijhawm ntev - siv ntawm 600℃. Muaj ob txoj hauv kev tseem ceeb uas tej yam tuaj yeem ua yuam kev uas ua rau lub neej luv:

Kev hnov ​​​​mob hnyav: Ntawm qhov kub ntawm 425 thiab 850 degrees Celsius, cov pa roj carbon atom txav mus rau thaj tsam lis thiab hnov ​​​​mob nrog chromium los ua chromium carbides. Qhov no yuav siv chromium tawm ntawm ib puag ncig matrix, uas yog lub caij uas ua rau cov txheej txheem tiv thaiv passive. Qhov kawg tshwm sim yog ib qho kev sib txuas ntawm cov cheeb tsam uas tsis tshua muaj chromium theem uas yog heev yooj yim rau tawg thiab intergranular corrosion, tshwj xeeb tshaj yog thaum kub hloov. Cov hlau tsis muaj zog thiab nkig.

Kev puas tsuaj Oxidation: Cov chromium oxide (Cr₂O₃) nplai uas tsim los tiv thaiv qhov chaw tsis muaj kev tiv thaiv. Nws tau tuab heev, ua ntxeem tau thiab tsis lo, thiab ua rau tawg. Qhov no ua rau cov hlau sai sai corrode (khoom pov tseg), uas ua rau cov phab ntsa sheath thinner thiab nws thiaj li tawg.

321 Stainless Hlau: Txawm hais tias titanium siv los ua kom ruaj khov thiab ua rau nws tsis tshua muaj kev cuam tshuam, 321 tseem ua haujlwm deb tshaj nws qhov kev pom zoo tsis tu ncua ntawm 600 degree. Nws yuav tau txais ntau qhov scaling thiab poob ntau lub zog ntawm qhov kub thiab txias (creep), uas ua rau nws muaj kev pheej hmoo xaiv.

Kev ua tau zoo hauv paus rau 310S Stainless Hlau
310S (UNS S31008, 1.4845) yog tus qauv siv tau qis tshaj plaws rau lub tshuab cua sov uas ua haujlwm ntawm 600 degrees Celsius. Qhov tseem ceeb tshaj plaws ntawm nws yog nws cov composition:

High Chromium (24–26%): Qhov no muab ntau ntau chromium rau koj ua thiab ua kom ruaj khov, ua raws, thiab tiv thaiv chromia (Cr₂O₃) nplai. Qhov no qeeb oxidation ntau dua 304/321.

Nickel cov ntsiab lus ntawm 19-22% stabilizes austenitic microstructure, ua rau nws ntau ductile ntawm qhov kub thiab txias, thiab ua rau nws resistant rau thermal cycling thiab carburization.

Siv: Zoo rau ib puag ncig uas muaj qhov kub thiab txias thiab oxidation tsis tu ncua. Nws yog ib qho kev txhim kho loj tshaj 300-series alloys, txawm hais tias nws tseem ua haujlwm ze rau nws qhov kev txwv siab tshaj plaws. Nws yog kev sib haum xeeb rau kev siv tseem ceeb lossis kev siv cyclical.

Incoloy thiab RA 330: Kev daws teeb meem rau kev cia siab
Nickel-hlau-chromium alloys xav tau rau kev ua haujlwm ntev-, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig sib xyaw lossis corrosive lossis thaum kub hloov.

RA 330® (UNS N08330): Qhov no feem ntau yog qhov zoo tshaj plaws thiab tus nqi ntau tshaj - tsim cov alloy zoo rau kev siv ntawm 600℃.

Nickel: 35%, Chromium: 19%, Silicon: 1.25%

Cov txiaj ntsig: Lub siab nickel concentration ua rau nws tiv taus oxidation, carburization, thiab nitriding. Nws ua kom nws lub zog ntawm qhov kub thiab txias (ceep resistance) zoo dua li stainless hlau. Lub silicon nyob rau hauv nws ua rau nws lo rau lub teev txawm zoo dua. Nws yog ua kom khiav tsis tu ncua ntawm 1150 degree, uas muab nws qhov kev nyab xeeb loj ntawm 600 degree.

Incoloy 800H / 800HT (UNS N08810 / N08811): Cov no yog cov qauv zoo tshaj plaws, txhim khu kev qha tshaj plaws rau kev siv ntau tshaj plaws.

Nws yog tsim los ntawm ib ncig ntawm 32% npib tsib xee, 21% chromium, thiab me me ntawm txhuas thiab titanium.

Cov txiaj ntsig: Cov txhuas pab tsim cov alumina muaj zog (Al₂O₃) sub- nplai hauv qab chromia txheej, uas ua rau nws tiv taus oxidation ntau dua. Cov alloys ruaj khov thiab daws tau -annealed los muab lawv lub zog zoo tiv thaiv siab -kub creep rupture thiab thermal qaug zog. Lawv yog cov ntaub ntawv zoo tshaj plaws rau kev siv nrog kev kub siab, huab cua hloov pauv, lossis huab cua nrog me me ntawm sulfur lossis carbon.

Synergy ntawm Internal Parts
Lub sheath tsis tuaj yeem ua haujlwm ntawm nws tus kheej; cov ntaub ntawv nyob rau hauv yuav tsum yog ib tug zoo haum rau ib puag ncig.

Standard 80/20 NiCr yog zoo rau cov hlau tsis kam, tab sis hlau -chromium- aluminium (FeCrAl) alloys zoo dua rau qhov kub siab tshaj plaws thiab lub neej ntev tshaj plaws hauv kev caij tsheb kauj vab. Lawv ua ib qho kev tiv thaiv alumina nplai uas cia lawv ua haujlwm ntawm qhov kub ntau dua.

MgO rwb thaiv tsev yuav tsum yog ntshiab thiab ntom heev, uas tsuas yog ua tau los ntawm isostatic nias. Dielectric kev puas tsuaj tshwm sim ntawm 600℃thaum muaj impurities lossis qhov chaw. The high density is important for keeping the coil cold by drawing heat away from it.

Xaus: Sheath Alloy yog qhov zoo ntev - kev nqis peev

Xaiv cov ntaub ntawv sheath rau 600℃cartridge rhaub yog qhov kev xaiv zoo uas yuav muaj kev cuam tshuam ncaj qha rau kev ua haujlwm thiab nyiaj txiag:

Siv 304/321: Tau lees tias nws yuav ua tsis tau ntxov thiab ntau zaus. Muaj kev pheej hmoo siab ntawm kev poob qis thiab kev puas tsuaj rau cov cuab yeej.

Siv 310S: Ua haujlwm zoo rau kev ruaj khov- lub xeev cov ntawv thov uas tsis xav tau ntau lub zog, tab sis tsis muaj ntau ntxiv.

Siv RA 330 lossis Incoloy 800HT: txoj hauv kev zoo kom paub tseeb tias qee yam yuav kav ntev thiab ntseeg tau. Tus nqi ntxiv ntawm cov ntaub ntawv yog me me piv rau tus nqi ntawm ib qho kev lag luam uas tsis tau teem tseg, ib qho pwm tawg, lossis qhov teeb meem kev nyab xeeb.

Yog li, qhov kev qhia tshwj xeeb yuav tsum tau ua kom meej thiab meej: "Rau kev ua haujlwm ntev ntawm 600℃nrog thermal cycling, cov ntaub ntawv sheath yuav tsum yog RA 330 (UNS N08330) lossis Incoloy 800HT (UNS N08811). Stainless steels los ntawm 300 tsev neeg tsis tau txais. Thaum koj ua haujlwm nrog cov chaw tsim khoom zoo, cov qib no tsuas yog lees paub. high-kub yam khoom uas tsim los mus kav ntev.