201 vs 304 Stainless Hlau: Tus Nqi piv rau Kev Txiav Txim Siab

 

Dab tsi yog qhov sib txawv ntawm qhov sib txawv thiab ua rau cov khoom sib txawv?
Cov ntsiab lus sib txawv yog nyob rau hauv npib tsib xee thiab manganese cov ntsiab lus . 304 yog ib qho 18-8 chrome-nickel steel (18% Cr, 8% Ni). 201 txo nickel (rau ~ 4%) thiab ntxiv manganese (~ 6%) thiab nitrogen kom tswj tau cov qauv austenitic ntawm tus nqi qis. Qhov kev hloov pauv no ua rau 201 muaj zog nyob rau hauv cov mob annealed tab sis txo qhov kev ruaj ntseg ntawm nws cov austenite. Yog li ntawd, 201 ua hauj lwm-hardens sai dua, muaj qis ductility nyob rau hauv hnyav forming, thiab, feem ntau critically, muaj kuj txo qis rau pitting thiab corrosion, tshwj xeeb tshaj yog los ntawm chlorides thiab acids, piv rau 304.

Hauv qhov chaw twg yog 304 qhov kev xav tau tiag tiag, thiab qhov twg 201 txaus?
304 yog qhov yuav tsum tau muaj rau cov ntawv thov kev tsim vaj tsev sab nrauv, ib puag ncig ntawm ntug hiav txwv, cov khoom siv ua zaub mov, cov dab dej hauv chav ua noj, tshuaj siv tshuaj, thiab txhua daim ntawv thov uas cuam tshuam rau lub sijhawm ntev ntawm cov dej noo, chlorides, lossis acidic tej yam kev mob . 201 tej zaum yuav txaus rau nruj nreem qhuav tha xim sab hauv daim ntaub ntawv, hollowware nrog txwv 2} khoom noj khoom haus, khoom noj khoom haus tsis muaj kev sib cuag, chlorides, thiab lwm yam. Cov khoom siv uas zoo li luv luv - lub sij hawm thiab ib puag ncig tswj. Siv 201 nyob rau hauv txhua qhov chaw uas condensation los yog ntsev yog tam sim no txaus ntshai staining ntxov ntxov thiab tsis ua hauj lwm.

Tus nqi tag nrho ntawm cov tswv cuab txawv li cas ntawm ob qib no rau ib yam khoom?
Thaum 201 muaj tus nqi pib qis dua, tag nrho cov nqi ntawm cov tswv cuab tuaj yeem siab dua yog tias nws ua rau cov khoom xa rov qab, kev lees paub kev lees paub, lub npe nrov npe puas tsuaj, lossis hloov thaum ntxov. Rau cov khoom lag luam txhais tau tias nyob rau xyoo tas los hauv qhov tiag - ib puag ncig ntiaj teb, tus nqi nce ntxiv ntawm kev siv 304 feem ntau yog txoj cai pov hwm muaj txiaj ntsig. Rau cov khoom siv pov tseg lossis ceev ceev - voj voog cov khoom siv uas tsis muaj corrosion tsis zoo nyob rau hauv cov khoom lub neej luv luv, 201 tuaj yeem muab kev txuag nyiaj tiag. Kev suav yuav tsum muaj nyob rau hauv cov khoom lag luam lub neej, kev siv ib puag ncig, thiab qhov tshwm sim ntawm kev ua tsis tiav.

Dab tsi yog qhov sib txawv fabrication ib lub chaw tsim khoom yuav tsum cia siab tias?
Ib lub chaw tsim khoom hloov ntawm 304 mus rau 201 yuav tsum suav rau nws txoj haujlwm sai dua - tus nqi hardening. Qhov no yuav xav tau kev hloov pauv ntau zaus, cov kauj ruam nruab nrab annealing rau qhov tob tob tob, thiab kev hloov kho rau bending radii. Vuam 201 xav tau kev saib xyuas ntau dua kom tsis txhob kub tawg, feem ntau yuav tsum tau siv 308L muab tub lim hlau. Nws qhov sib tsoo sparks yuav txawv. Thaum cov no tswj tau, lawv ntxiv cov complexity thiab nqi rau cov txheej txheem fabrication, muaj peev xwm offsetting ib co ntawm raw khoom txuag.

Dab tsi yog lub luag haujlwm thiab kev coj ncaj ncees rau kev qhia cov ntaub ntawv no?
Lub luag hauj lwm specification muaj tag nrho cov pob tshab. Yog tias siv 201, nws yuav tsum raug txheeb xyuas kom meej txog qhov kawg -tus neeg siv, tsis yog tsuas yog sau tias "stainless steel," uas yog qhov kev cia siab ntawm 304- theem kev ua tau zoo. Engineers muaj lub luag haujlwm coj ncaj ncees kom phim cov khoom siv rau qhov kev pabcuam tiag tiag. Yog tias muaj kev tsis ntseeg txog cov xwm txheej, kev ua yuam kev ntawm sab ntawm 304 yog qhov kev xaiv zoo. Rau cov haujlwm uas muaj kev nyab xeeb ntawm lub neej, kev nyiam huv, lossis kev ncaj ncees ntawm cov txheej txheem, 304 (lossis siab dua) yuav tsum yog lub neej ntawd, nrog 201 txiav txim siab tsuas yog rau nws qhov tsim nyog tiag tiag, tsis yog qhov tseem ceeb.