Sheath Materials Nyob rau hauv lub microscope - Xaiv txoj cai Alloy rau 650 degree
Ntawm 650 degree, kev xaiv ntawm cov ntaub qhwv tsis yog qhov nyiam tshaj plaws - nws yog ib qho teeb meem ntawm kev ciaj sia. Ordinary 304 stainless hlau oxidizes sai ntawm qhov kub thiab txias, ua rau lub plhaub tsis muaj zog thiab cov coil sab hauv tsis ua haujlwm. Raws li kev soj ntsuam kev lag luam, lub tshuab cua sov cartridge nrog Inconel sheath tuaj yeem siv tau peb mus rau tsib zaug ntev dua ib qho nrog cov qauv stainless hlau hauv 650℃ib puag ncig.
Kev nkag siab yog vim li cas yuav tsum tau saib ze dua ntawm qhov tshwm sim rau cov hlau sib txawv ntawm qhov kub siab.
304 thiab 321 Stainless hlau.Cov ntaub ntawv no tau txais kev puas tsuaj oxidation thiab rhiab heev ntawm 650 degree. Qhov kev tiv thaiv chromium oxide nplai uas ib txwm tiv thaiv qhov chaw nres tsis ua raws thiab rov ua dua, ua rau phab ntsa sai sai. Nyob rau tib lub sijhawm, chromium poob ntawm cov ciam teb nplej- txheej txheem hu ua rhiab heev- ua rau cov sheath tsis tshua muaj nkig thiab muaj kev cuam tshuam rau intergranular cracking. 310S stainless hlau muaj kev txhim kho me ntsis tab sis tseem ua haujlwm ntawm ntug ntawm nws lub peev xwm uas tsis muaj kev nyab xeeb margin.
316L Stainless hlau.Cov khoom no sawv cev rau ib qho tseem ceeb nce qib. Nws muab kev tiv thaiv zoo rau corrosion, nkag, thiab oxidation ntawm qhov kub thiab txias. Rau cov ntawv thov uas ib puag ncig huv si thiab lub voj voog ua haujlwm thermal yog nruab nrab, 316L tuaj yeem xa cov kev pabcuam txhim khu kev qha ntawm 650 degree. Nws tus nqi -kev ua tau zoo ua rau nws muaj kev xaiv zoo rau ntau daim ntawv thov kev lag luam.
Incoloy 800 / 800H / 800HT.Cov npib tsib xee no - hlau-chromium alloy yog dav suav hais tias yog tus qauv yam tsawg kawg nkaus rau kev pab cuam ntawm 650℃. Nws yog engineered rau siab -kub kev ua tau zoo, nrog rau oxidation thiab tuav lub zog mus txog 1150 degree. Lub 800H thiab 800HT variants muaj kev txhim kho siab -kub creep zog thiab tiv thaiv thermal qaug zog- cov yam ntxwv tseem ceeb rau kev xav tau lub luag haujlwm nrog kev caij tsheb kauj vab ntau zaus.
Inconel 600 thiab 601.Cov npib tsib xee -chromium alloys yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov 650℃nyuaj tshaj plaws. Lawv ua tau zoo nyob rau hauv ib puag ncig oxidizing hnyav lossis thaum muaj cov ntaub ntawv corrosive. Hauv kev siv lub tshuab nqus tsev, Inconel 600 muaj qhov tsis tshua muaj vapor siab, zoo heev - kub lub zog, thiab oxidation kuj zoo kawg li yog tias lub tshuab nqus tsev tawg. Inconel feem ntau yog qhov kev xaiv zoo tshaj plaws rau lub tshuab cua sov ua haujlwm hauv lub tshuab nqus tsev ntawm qhov kub siab tshaj 800 degree.
Kev xaiv cov khoom tseem cuam tshuam rau cov hlau lead thiab kev xaiv txiav. Ntawm 650 degree, txhuas yuav tsum tiv taus qhov chaw ua haujlwm tsis muaj melting lossis luv luv. Swaged-hauv kev tsim cov hlau lead- qhov twg cov hlau lead yog sib txuas ncaj qha yam tsis muaj kev sib txuas ntawm lub davhlau ya nyob twg- muab qhov kub thiab txias ua haujlwm ntau dua thiab cov khoom siv kho tshuab muaj zog dua li crimped lwm txoj kev.
Ib qho kev xav txog feem ntau tsis pom zoo: lub tshuab rhaub lub tshuab ua haujlwm sab hauv ua haujlwm ntawm qhov kub ntau pua degrees siab tshaj qhov kub ntawm lub plhaub. Hauv kev ua haujlwm tsis zoo, 650℃sheath tuaj yeem txhais tau tias yog 800-900℃kauj. Ntawm qhov kub thiab txias no, cov pa roj carbon monoxide oxidize sai, thiab kev loj hlob ntawm cov nplej tuaj yeem tshwm sim, ua rau cov khoom nkig thiab nws thiaj li ua rau tawg ntawm thermal cycling. Qhov no yog vim li cas siab -purity npib tsib xee-chromium alloys yog qhov tseem ceeb rau cov hlau tsis muaj zog sab hauv hauv 650℃ib lub taub hau cartridge rhaub.
