Qhov kev lag luam twg yog Astm A335 P9 steel yeeb nkab feem ntau siv?
ASTM A335 P9 steel yeeb nkab yog ib txwm muaj- cov yeeb nkab kub, feem ntau siv hauv lub zog thiab kev lag luam hnyav. Nws cov ntaub ntawv tseem ceeb yog hauv cov khoom siv boiler hauv cov hluav taws xob thermal, kev thauj khoom loj, thauj khoom siab} {5} - siab} lub siab. Nws tseem dav siv nyob rau hauv petrochemical kev lag luam, tuav siab - Cov txheej txheem kub hauv cov txheej txheem ua kom tawg, hloov pauv hloov pauv, thiab cov hloov cua sov. Furthermore, it is used for heating furnace piping in the metallurgical industry and in various industrial equipment requiring high-temperature and high-pressure resistance.
Hauv lub hwj chim nroj tsuag boilers, muaj feem ntawm cov khoom siv yog P9 steel kav siv rau dab tsi?
Hauv thee -}} {-}}}}}}}}} Recheratures yog qhov siab dua tab sis hauv qab no xav tau rau antenilic steel. Nws yog feem ntau siv nyob rau hauv lub boiler supermeer piping, uas cua sov saturated chav rau superheated chav. Nws tseem siv nyob rau hauv kev rov ua hauj lwm tom qab ua haujlwm tom qab ua haujlwm nyob rau hauv lub siab {{}} tshuab lub tog raj kheej rau kev ua haujlwm ntxiv. Cov feem no yog cov ua haujlwm hnyav tshaj plaws hauv kev ua haujlwm boiler system, xav tau cov ntaub ntawv nrog ob qho siab - kub ntev.
Yuav P9 Steel Kave yuav siv rau hauv cov chaw muaj kev nyab xeeb?
P9 steel kav siv, tab sis qhov no tseem ceeb hom siab- kub oxidation thiab flue roj kuab corrosion, tsis muaj zog tshuaj corrosion. Nws 8 {- 10% chromium cov ntsiab lus muab sulfide {5 5}}}}} tua boilers. Txawm li cas los xij, P9 lub corrosion tsis txaus yog qhov tsis txaus hauv chloride- nplua nuj, acidic, lossis muaj zog alkaline ib puag ncig. Nyob rau hauv cov rooj plaub no, stainless hlau lossis nickel - raws li alloys yuav tsum tau siv. Yog li, nws daim ntawv thov yog feem ntau txwv rau hom kev kub siab, gaseous corrosive ib puag ncig.
Vim li cas P9 xaiv hla cov hlau hlau lossis lwm cov hlau nplaum Alloy rau cov ntawv thov no?
P9 tau raug xaiv raws nws txoj kev ua tau zoo ntawm kev ua tau zoo thiab tus nqi. Cov hlau ua tib zoo tib yam (xws li A106b) kev ua kom lub zog sib txawv ntawm 425 Degree thiab muab cov oxidation tsis kam, tsis ua raws li cov cai no. Thaum qis {- Cov hlau aluminoy xws li P11 / P22 kev ua haujlwm siab dua, lawv cov kev ua haujlwm siab tshaj yog tseem qis dua li cov P9. Austenitic stainless hlau (xws li 304h) muaj cov kev ua tau zoo dua tab sis raug nqi thiab muaj cov coefficient ntawm thermal expansion. Yog li no, p9 muab txaus siab- kub lub zog, thiab tus nqi pheej yig tsis pub dhau 600-650 degree, ua nws txoj kev xaiv zoo tshaj plaws.
Dab tsi yog kev ua haujlwm ntau ntawm P9 steel yeeb nkab?
ASTM A335 P9 cov yeeb nkab steel feem ntau yog tsim los rau kev ua haujlwm tas mus li 650℃(1200℃f). Nyob rau hauv qhov ntsuas kub no, nws tswj hwm nws cov kev ntxhov siab uas muaj kev ntxhov siab thiab ua kom zoo nkauj thiab oxidation tsis kam. Thaum nws tuaj yeem raug nthuav dav ib ntus, ntev dua {{6} kev ua haujlwm tau txo nws lub neej kev pabcuam thiab yuav ua rau muaj kev loj hlob nrawm dua lossis ua kom muaj kev loj hlob nrawm. Rau cov ntawv thov tshaj 650 degree, siab dua- cov khoom lag luam qib xws li P91 thiab P92 thiab P92, lossis AUTENERITIC stainless hlau, feem ntau suavdias.
