Vim li cas 316 kim dua 304?
Taw qhia:
Thaum nws los txog rau stainless hlau, qib sib txawv ua haujlwm sib txawv thiab tuaj ntawm cov ntsiab lus sib txawv. Ib qho piv txwv zoo li no yog qhov sib piv ntawm 304 thiab 316 stainless hlau. Thaum ob qho tib si yog cov kev xaiv nrov rau ntau yam kev siv, 316 stainless hlau feem ntau kim dua 304 stainless hlau. Ntau yam ua rau muaj qhov sib txawv ntawm tus nqi no, suav nrog kev muaj pes tsawg leeg, kev tiv thaiv corrosion, thiab kev siv tshwj xeeb. Hauv tsab xov xwm no, peb yuav piav qhia txog cov laj thawj vim li cas 316 stainless hlau hais kom tus nqi siab dua piv rau 304 stainless hlau.
Kev sib xyaw thiab Alloying Elements:
Yuav kom nkag siab txog tus nqi sib txawv ntawm 316 thiab 304 stainless hlau, nws yog ib qho tseem ceeb rau kev tshuaj xyuas lawv cov muaj pes tsawg leeg thiab cov ntsiab lus alloying.
304 Stainless hlau:
- 304 stainless hlau feem ntau muaj hlau, nyob ib ncig ntawm 70-75%, thiab chromium, uas yog nyob ib ncig ntawm 18-20%.
- Nws kuj muaj me me ntawm npib tsib xee, carbon, manganese, thiab silicone.
316 Stainless hlau:
- 316 stainless hlau, ntawm qhov tod tes, muaj qhov zoo sib xws rau 304 stainless hlau, muaj li 70% hlau thiab 18% chromium.
- Txawm li cas los xij, nws kuj muaj nyob ib ncig ntawm 11-14% nickel thiab 2-3% molybdenum.
- Qhov sib ntxiv ntawm npib tsib xee thiab molybdenum ua rau muaj kev txhim kho corrosion ntawm 316 stainless hlau.
Txhim kho Corrosion Resistance:
Ib qho ntawm cov laj thawj tseem ceeb vim li cas 316 stainless hlau yog kim dua li nws cov counterpart yog nws superior corrosion kuj.
304 Stainless hlau:
- Thaum 304 stainless hlau pom zoo tiv thaiv corrosion nyob rau hauv ib puag ncig ib puag ncig, nws tsis zoo li corrosive cov ntsiab lus zoo li chlorides pom nyob rau hauv dej hiav txwv thiab chaw lag luam.
- Kev raug chloride ntev ntev tuaj yeem ua rau pitting corrosion, ua rau 304 stainless hlau tsis haum rau kev siv dej hiav txwv thiab ntug hiav txwv.
316 Stainless hlau:
- Lub xub ntiag ntawm molybdenum nyob rau hauv 316 stainless hlau ho txhim khu nws kev tiv thaiv corrosion, tshwj xeeb tshaj yog tiv thaiv chlorides thiab acids.
- Yog li ntawd, 316 stainless hlau yog dav siv nyob rau hauv marine ib puag ncig, tshuaj ua cov nroj tsuag, thiab lwm yam corrosive daim ntaub ntawv.
- Kev txhim kho corrosion kuj ua rau 316 stainless hlau yog qhov kev xaiv zoo tshaj plaws hauv kev lag luam uas muaj kev ruaj khov thiab ntev ntev yog qhov tseem ceeb.
Daim ntawv thov tshwj xeeb thiab kev lag luam xav tau:
Cov ntawv thov tshwj xeeb thiab kev lag luam xav tau rau 316 stainless hlau ua lub luag haujlwm hauv kev tsav nws tus nqi piv rau 304 stainless hlau.
304 Stainless hlau:
- Vim nws muaj ntau yam, 304 stainless hlau pom cov ntawv thov hauv ntau qhov kev lag luam thiab cov khoom lag luam.
- Nws yog feem ntau siv hauv cov khoom siv hauv chav ua noj, cov khoom siv ua zaub mov, thiab cov khoom siv vaj tsev.
- Kev nplua nuj ntawm 304 stainless hlau hauv kev ua lag luam thiab nws cov txheej txheem tsim khoom tsawg dua ua rau nws tus nqi qis dua piv rau 316 stainless hlau.
316 Stainless hlau:
- Thaum 316 stainless hlau pom cov ntawv thov hauv kev lag luam zoo sib xws li 304 stainless hlau, nws tshwj xeeb tshaj yog muaj nuj nqis hauv kev lag luam marine thiab tshuaj lom neeg ua rau nws zoo dua corrosion kuj.
- Qhov kev thov rau 316 stainless hlau feem ntau yog siab dua hauv cov kev lag luam no, ua rau cov khoom siv tsawg thiab cov nqi siab dua.
- Tsis tas li ntawd, cov txheej txheem tsim khoom rau 316 stainless hlau suav nrog ntau txoj kev alloying thiab kev kho cua sov, ntxiv rau nws cov nqi siab.
Tus nqi siab dua ntawm cov khoom siv raw:
Tus nqi ntawm cov khoom siv raw, feem ntau yog npib tsib xee thiab molybdenum, ua lub luag haujlwm tseem ceeb hauv tus nqi sib txawv ntawm 304 thiab 316 stainless hlau.
Nickel:
- 316 stainless hlau muaj feem pua nickel ntau dua piv rau 304 stainless hlau.
- Tus nqi ntawm npib tsib xee tuaj yeem hloov pauv tau vim muaj ntau yam xws li cov khoom siv thoob ntiaj teb, kev thov, thiab cov xwm txheej ntawm thaj chaw.
- Txhua qhov kev nce nqi ntawm nickel cuam tshuam ncaj qha rau tus nqi ntawm kev tsim 316 stainless hlau, ua rau nws tus nqi siab dua.
Molybdenum:
- Molybdenum, lwm yam alloying khoom tam sim no nyob rau hauv 316 stainless hlau, kuj cuam tshuam nws tus nqi.
- Zoo li npib tsib xee, tus nqi ntawm molybdenum tuaj yeem sib txawv vim yog kev lag luam thiab cov xwm txheej geopolitical.
- Kev suav nrog molybdenum hauv 316 stainless hlau ntxiv rau nws cov nqi tsim khoom, ua rau nws kim dua piv rau 304 stainless hlau.
Xaus:
Hauv cov ntsiab lus, 316 stainless hlau yog kim dua 304 stainless hlau vim muaj ntau yam. Cov muaj pes tsawg leeg, suav nrog qhov sib ntxiv ntawm npib tsib xee thiab molybdenum, muaj kev txhim kho corrosion kuj, ua rau nws tsim nyog rau kev xav tau ib puag ncig xws li marine thiab tshuaj ua lag luam. Cov ntawv thov tshwj xeeb thiab kev lag luam xav tau rau 316 stainless hlau, ua ke nrog tus nqi siab dua ntawm cov khoom siv raw xws li npib tsib xee thiab molybdenum, pab txhawb rau nws cov nqi siab. Thaum ob qib muaj lawv cov txiaj ntsig tshwj xeeb, kev nkag siab txog cov laj thawj tom qab tus nqi sib txawv ua rau muaj kev paub txog kev txiav txim siab thaum xaiv cov hlau tsis zoo rau ib daim ntawv thov.
