310S vs 330 Stainless Hlau: Siab -Temp Nickel-Alloyed Alloys

 

Dab tsi yog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab kev siv thawj zaug ntawm 310S thiab 330?
Qib 310S yog siab -chromium (25%), siab -nickel (20%) austenitic stainless hlau stabilized nrog cov ntsiab lus carbon tsawg. Alloy 330 muaj ntau nickel (35{14}}37%), nrog rau 17-20% chromium, thiab ntxiv dag zog nrog silicon. Qhov no muaj pes tsawg leeg muab 330 tshwj xeeb tsis kam rau thermal shock thiab carburization. Ob lub alloys tuav lub zog zoo thiab tiv thaiv qhov ntsuas kub ntawm qhov kub siab tshaj 1000℃. 310S feem ntau yog siv rau cov kav hlau hluav taws xob, cov raj pyrolysis, thiab cov khoom siv hluav taws xob kub kub. Alloy 330 tau teev tseg rau cov ntawv thov uas xav tau tshaj plaws xws li radiant burner raj, annealing npog, thiab kho vajtse kho dua tshiab hauv petrochemical ua.

Dab tsi yog qhov sib txawv ntawm qhov tseem ceeb hauv lawv qhov kev ua haujlwm siab - kub?
Qhov tseem ceeb sib txawv yog nyob rau hauv lawv cov kev ua tau zoo nyob rau hauv thermal cycling thiab nyob rau hauv tej huab cua. 310S muaj oxidation zoo heev nyob rau hauv tas li, siab - kub oxidizing ib puag ncig. Txawm li cas los xij, 330 ntau dua nickel thiab silicon cov ntsiab lus muab kev tiv thaiv zoo tshaj rau carburization (carbon pickup) thiab nitriding. Nws kuj nthuav tawm cov ductility zoo dua thiab ua rau cov thermal qaug zog tom qab rov ua cua sov thiab cua txias, ua rau nws ruaj khov dua hauv cov ntawv thov nrog qhov kub thiab txias hloov pauv lossis hauv ib puag ncig uas muaj cov pa roj carbon monoxide lossis hydrocarbons.

Nyob rau hauv lub qhov cub cua qhov twg yog 330 qhov txawv ntawm 310S?
Alloy 330 yog qhov zoo tshaj plaws hauv carburizing thiab txo cov huab cua, nrog rau hauv ib puag ncig nrog alternating oxidizing thiab txo cov xwm txheej. Qhov no suav nrog cov cua sov kho cua sov nrog cov cua sov tiv thaiv, cov tshuaj ua tshuaj reactors cuam tshuam nrog hydrocarbon tawg, thiab nyob txhua qhov chaw ntawm huab cua yog nplua nuj nyob rau hauv carbon monoxide. Nyob rau hauv cov xwm txheej no, 310S tuaj yeem dhau los ua rau cov pa roj carbon nqus. Rau cov huab cua oxidizing tsis tu ncua (dhau cua), 310S ua tau zoo heev thiab feem ntau raug nqi ntau dua - zoo.

Yuav ua li cas fabrication thiab nqi txiav txim siab txawv ntawm ob lub alloys?
Ob lub alloys muaj kev ua haujlwm siab- cov nqi hardening, yuav tsum muaj zog ntau dua rau kev tsim thiab machining. Vuam yog ua tau nrog kev sib txuam lossis dhau -alloyed muab tub lim, tab sis tom qab-weld annealing yog pom zoo. Thawj qhov kev txiav txim siab yog tus nqi: Alloy 330, nrog nws cov ntsiab lus nickel siab heev, nqa tus nqi siab dua li 310S. Tus nqi sib txawv no hais tias 330 tsuas yog yuav tsum tau teev tseg qhov twg nws qhov kev ua tau zoo dua qub hauv qhov tshwj xeeb, qhov xwm txheej hnyav yog qhov tsim nyog los tiv thaiv kev ua tsis tiav ntxov.

Dab tsi yog cov lus qhia kawg rau kev xaiv ntawm 310S thiab Alloy 330?
Ua raws li cov hierarchy no: Ua ntej, txhais qhov siab tshaj plaws kev pabcuam kub thiab cua. Rau kev txuas ntxiv, ruaj khov oxidizing txog 1150 degree, 310S yog qhov kev xaiv zoo heev. Thib ob, yog tias daim ntawv thov cuam tshuam nrog thermal cycling, carburizing muaj peev xwm, los yog sib xyaw / txo cov cua sov-tshwj xeeb tshaj li 1000℃-Alloy 330 yuav tsum tau. Qhov kev txiav txim siab yog qhov tseem ceeb ntawm kev sib piv cov alloy qhov tshwj xeeb tsis kam (oxidation vs. carburization) rau qhov tseem ceeb tsis ua hauj lwm mechanism hauv daim ntawv thov. Tsis txhob hloov 310S rau 330 hauv ib puag ncig carburizing.