Dab tsi yog qhov tsis muaj zog ntawm 304 stainless hlau?
Taw qhia:
Stainless hlau yog cov khoom siv dav siv hauv ntau qhov kev lag luam vim nws zoo heev corrosion kuj, durability, thiab versatility. Ntawm qhov sib txawv ntawm cov hlau tsis muaj steel, qib 304 yog ib qho ntawm feem ntau siv alloys. Nws muaj npe nrov rau nws cov khoom tshwj xeeb thiab kev siv dav dav. Txawm li cas los xij, zoo li lwm yam khoom siv, 304 stainless hlau kuj muaj qee qhov tsis muaj zog uas yuav tsum tau xav txog hauv cov ntsiab lus tshwj xeeb. Nyob rau hauv tsab xov xwm no, peb yuav tshawb xyuas kom meej txog qhov tsis muaj zog ntawm 304 stainless hlau thiab lawv qhov cuam tshuam rau nws qhov kev ua tau zoo.
Chemical Composition ntawm 304 Stainless Hlau:
Ua ntej delving rau hauv qhov tsis muaj zog, nws yog ib qho tseem ceeb kom nkag siab txog cov tshuaj muaj pes tsawg leeg ntawm 304 stainless hlau. Cov muaj pes tsawg leeg feem ntau suav nrog chromium (18-20%), nickel (8-10.5%), manganese (2%), silicon (1%), carbon (0.{{10} 8%), phosphorus (0.045%), thiab sulfur (0.03%). Cov ntsiab lus alloying no qhia cov khoom tshwj xeeb rau cov hlau, tab sis lawv kuj ua rau nws qhov tsis muaj zog.
Weaknesses ntawm 304 Stainless hlau:
1. rhiab heev rau chloride:
Ib tug ntawm lub ntsiab tsis muaj zog ntawm1.4301 AISI 304 stainless hlauyog nws rhiab heev rau chloride. Kev raug cov tshuaj chloride-muaj ib puag ncig, xws li dej hiav txwv lossis qee qhov chaw muaj kev lag luam, tuaj yeem ua rau muaj kev xeb hauv zos, feem ntau hu ua pitting corrosion. Qhov no tshwm sim thaum cov txheej txheem passive ntawm cov hlau raug cuam tshuam, tso cai rau cov chloride ions los tua cov khoom. Pitting corrosion tuaj yeem cuam tshuam qhov kev ncaj ncees ntawm cov hlau, ua rau kev ua haujlwm tsis zoo.
2. Tsis haum rau kev siv kub-kub:
Thaum S30400 stainless hlau nthuav tawm lub zog zoo heev thiab oxidation tsis kam ntawm qhov kub nruab nrab, nws tsis haum rau lub sijhawm ntev rau huab cua sov. Ntawm qhov kub siab tshaj 800 degree (1472 degree F), cov khoom yuav raug carbide nag lossis daus, uas ua rau muaj kev kub ntxhov. Sensitization ua rau depletion ntawm chromium nyob ze ntawm cov ciam teb, txo cov khoom siv corrosion kuj thiab ua rau nws raug rau intergranular corrosion.
3. Txaus siab rau Crevice thiab Stress Corrosion Cracking:
304 stainless hlauNws yog feem ntau rau crevice thiab kev nyuaj siab corrosion cracking nyob rau hauv tej qhov chaw. Crevice corrosion tshwm sim nyob rau hauv nruj qhov chaw uas cov pa oxygen tsawg, xws li hauv qab gaskets los yog deposits ntawm qhov chaw. Kev ntxhov siab corrosion tawg, ntawm qhov tod tes, yog qhov tshwm sim ntawm kev sib xyaw tensile kev nyuaj siab thiab corrosive ib puag ncig. Ob hom kev xeb tuaj yeem ua rau muaj kev poob qis, ua rau 304 stainless hlau tsis haum rau kev siv hauv cov xwm txheej zoo li no.
4. Tsis muaj zog dua li Lwm Cov Qib Stainless Hlau:
Thaum 304 stainless hlau muaj lub zog zoo thiab ductility, nws tsis muaj zog li qee cov qib stainless hlau. Rau cov ntawv thov uas lub zog siab yog qhov tseem ceeb, lwm txoj kev nyiam316 stainless hlaulos yogduplex stainless hlautej zaum yuav tsim nyog. Cov qib no muaj cov ntsiab lus alloying ntxiv xws li molybdenum lossis nitrogen, muab lub zog zoo dua thiab tiv thaiv corrosion.
5. Yooj yim rau khawb thiab khawb:
Lwm qhov tsis muaj zog ntawm 304 stainless hlau yog nws qhov cuam tshuam rau khawb thiab khawb. Galling tshwm sim thaum ob qhov chaw hlau nyob rau hauv kev sib cuag nrog ib leeg muaj kev sib txhuam ntau dhau, ua rau cov khoom hloov mus. Qhov no tuaj yeem tshwm sim thaum zawv zawg lossis txhuam nrog lwm cov hlau. Lub xub ntiag ntawm chromium nyob rau hauv 304 stainless hlau txo qhov hnyav ntawm galling, tab sis nws tseem muaj ntau dua rau khawb thiab galling piv rau cov alloys nyuaj.
6. Txwv tsis kam rau qee yam tshuaj lom neeg:
Thaum 304 stainless hlau nthuav tawm zoo heev tiv thaiv rau ntau yam tshuaj, nws muaj kev txwv tsis pub muaj zog rau qee cov kua qaub, hauv paus, thiab chlorides. Nyob rau hauv ib puag ncig uas muaj acidic los yog alkaline heev, xws li tshuaj ua cov nroj tsuag, cov khoom yuav muaj kev ceev corrosion. Tsis tas li ntawd, raug cov tshuaj chlorides, tshwj xeeb tshaj yog nyob rau ntawm qhov kub siab, tuaj yeem ua rau muaj kev ntxhov siab corrosion tawg thiab pitting corrosion.
7. Tsis Magnetizable:
Lub austenitic qauv ntawm 304 stainless hlau ua rau nws tsis-sib nqus nyob rau hauv nws annealed mob. Qhov no tuaj yeem yog qhov zoo dua thiab qhov tsis muaj zog, nyob ntawm daim ntawv thov. Qee zaum, cov khoom sib nqus yog xav tau, xws li rau electromagnetic shielding lossis qee yam kev lag luam. Hauv cov xwm txheej zoo li no, lwm qib stainless hlau zoo li 430 lossis ferritic stainless hlau yuav tsim nyog dua.
Stainless Hlau Thiab Nickel Alloy Cov Khoom Muag Khoom
Peb muab lwm yam stainless hlau thiab npib tsib xee alloy qib ntawm cov yeeb nkab steel thiab phaj uas muaj kev tiv thaiv corrosion zoo heev thiab tsis kam mus rau qhov kub thiab txias hauv qhov chaw hnyav. Piv txwv li, Stainless hlau qib:316, 316L, 316Ti, 316L Mod, 17-4ph, 310, 310S, 317, 317L, 321, 321H, 347, 347H, 904L, 254SMO, 32520S, S3 TIAB SA 2507, S31050, S30815, lwm.
Nickel alloy qib:Kev 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Hastalloy C22, Hastalloy C276, Monel K500, Inconel 600, Inconel 601, lwm.
