Los ntawm cov kev xav tau nqi, yuav muab piv txwv li cas rau Austenitic Stainless hlau (xws li 304L)?
Los ntawm cov ntaub ntawv ua kom muaj txiaj ntsig tus nqi zeem muag, A333 Gr.7 (3.5% ni steel tab sis ho pheej yig dua li Austenitic Stainless hlau (xws li 304L). Tus nqi stainless hlau yog cuam tshuam ntau dhau los ntawm kev ua lag luam hloov pauv nyob rau hauv npib tsib xee thiab chromium, thiab lawv cov chav ntsuas yog feem ntau 1.5 zaug lossis siab dua li ntawm Gr.7. Yog li ntawd, kwv yees tsim qhov ntsuas kub ntawm -101 tau ntsib, Gr.7 yog kev lag luam ntau dua li steel hlau. Txawm li cas los xij, ib qho kev txheeb xyuas tus nqi tsom xam yuav tsum: yog tias qhov nruab nrab yog corrosive, stainless hlau tej zaum yuav tiv taus cov nqi tiv thaiv corrosion lossis txuag kev pabcuam kev ua haujlwm. Tsis tas li ntawd, Gr.7 muaj kev vuam ntau dua li cov hlau, tab sis tej zaum yuav tsis kim dua li cov hlau tsis siv. Qhov kev xaiv kawg yuav tsum muaj kev sib piv ntawm kev lag luam thiab kev sib piv ntawm kev lag luam.
Tau A333 Gr.7 siv tau ntawm qhov chaw kub qis dua (xws li -162℃lng)?
Kiag li tsis. Lub ASTM A333 Gr.7 tus qauv qhia meej qhov kev tsim tawm tsawg kawg ntawm - 10150℃f). LNG cia kub muaj kwv yees li -162 degree, deb hauv qab no qhov txwv tsis pub siv rau Gr.7. Ntawm qhov ntsuas kub no, GR.7 cov khoom poob zoo hauv qab nws txoj kev hloov chaw kub-brittic hloov pauv, ua tiav nws txoj kev nyuaj thiab muaj tseeb heev. Ib qho kev tsis txaus siab me lossis kev ntxhov siab yuav ua rau nrawm nroos tawg, ua rau kev puas tsuaj rau kev puas tsuaj. Rau kev khiav hauj lwm kub ntawm -162 degree, cov ntaub ntawv nrog cov hlau siab dua, xws li 9% Nickel Steel (uas tswj hwm kev ua kom zoo ntawm cov huab cua sov no.
Dab tsi yog qhov hloov maj mam ntawm A333 Gr.7 thiab A333 Gr.3 (3.5% ni vs {% ni)?
Ob qho tib si A3333 Gr.7 thiab Gra3 muaj kwv yees li 3.5% npib tsib, tab sis lawv qhov sib txawv tseem ceeb dag nyob rau hauv lawv qhov kev cuam tshuam ntsuas kub thiab tsim qauv ntsuas kub. GR.7 yog kev cuam tshuam xeem ntawm -101 degree, nrog qhov kev tsim tsawg kawg ntawm -101 degree. Gra3, ntawm qhov tod tes, yog cuam tshuam xeem ntawm -100 degree, nrog kev tsim tawm yam tsawg kawg nkaus ntawm -100 degree. Txawm hais tias qhov sib txawv tsuas yog 1 degree, ob qib no tau txiav txim siab cais cov qauv kev paub, xav txog qhov system nruj. Tsis tas li ntawd, Gr.3 muaj qhov txwv sab saud ntawm tooj liab (Cu) cov ntsiab lus (tsawg dua lossis sib npaug rau 0.40%), thaum Gr.7 tsis. Hauv kev siv cov kev siv, lawv tau txiav txim siab sib npaug, tab sis qib teev nyob hauv daim ntawv cog lus thiab cov ntaub ntawv tsim qauv yuav tsum tau yuav.
Thaum twg yuav 9% npib tsib xee (A333 GR.8) raug xaiv rau Gr.7?
Thaum qhov kev tsim qauv ntsuas kub yog qis dua- 101 kev txwv ntawm A333 Gr.7, 9% Nickel Hlau (A333 Gr.8) yuav tsum raug xaiv. A333 Gr.8 muaj qhov kev tsim tawm tsawg kawg ntawm -196 degree, ua rau nws dav siv nyob rau hauv cryogenic ib puag ncig xws li kua helium (-269 degree), thiab lng (-162 degree). Txawm hais tias 9% Nickel Steel tau ntau dua cov khoom siv raw ntau dua thiab cov nqi tsim khoom, nws zoo tshaj cryogenic kev ua haujlwm yog Irreplaceable. Kev txiav txim txim xaiv yog nyob ntawm nkaus ntawm kev ntsuas qhov tsawg kawg nkaus (MDMT) ntawm cov txheej txheem system. Yog tias MDMT nyob qis dua -101 degree, kho kom zoo dua rau gra8 lossis lwm cov khoom muaj zog dua yog tsim nyog.
Dhau li ntawm qhov kub, dab tsi lwm cov ntsiab lus tseem ceeb yuav tsum tau txiav txim siab thaum xaiv cov ntaub ntawv Cryogenic?
Qhov kub yog thawj qhov tseem ceeb, tab sis los ntawm tsis muaj txhais tau tias tsuas yog ib qho. Corrosiveness ntawm nruab nrab yog qhov tseem ceeb: txawm tias ntawm qhov ntsuas kub, yog tias nruab nrab yog corrosive rau cov roj carbon hlau (h ₂້ອນ Kev Ntsuas Siab: Cov khoom muaj kev ntxhov siab tau pub rau kev ua haujlwm kub yuav tsum tau xam kom txiav txim siab seb nws puas tuaj yeem ua tau raws li lub siab xav tau. Thermal Cycling: nquag kub hloov pauv hloov kev ntxhov siab, tso cov kev xav tau ntau dua ntawm cov khoom siv ceev. Ua thiab tsim cov peev txheej: piv txwv li kev sib tw, cov vuam hlau yog qhov muaj txiaj ntsig heev, yog li cov kws cog lus yuav tsum tau ntsuas. Cov Kev Tswj Cov Cai thiab Cov Qauv: Cov kev coj ua uas yuav tsum muaj nyob rau hauv qhov chaw tshaj tawm yuav muaj cov khoom siv tshwj xeeb. Qhov kev xaiv kawg yog qhov sib npaug tshuav ntawm kev sib npaug ntawm kev ua, kev nyab xeeb, kev ntseeg tau, thiab tus nqi {{} ua hauj lwm zoo.
