Cov khoom siv 254SMO zoo yeej ib txwm muaj tus nqi zoo meej hauv nws cov tshuaj lom neeg, txhua yam khoom muaj nws txoj haujlwm:
Nickel (Ni): Nickel tuaj yeem ua rau lub zog ntawm 254SMO hlau nce ntxiv thaum tswj tau qhov zoo ntawm cov yas thiab tawv. Nickel muaj kev tiv thaiv corrosion siab rau cov kua qaub thiab alkalis, thiab muaj xeb thiab tiv taus cua sov ntawm qhov kub siab.
Molybdenum (Mo): Molybdenum tuaj yeem ua kom cov noob ntawm 254SMO hlau zoo dua, txhim kho qhov tawv thiab lub zog thermal, thiab tswj tau lub zog txaus thiab kev tiv thaiv nkag mus rau qhov kub siab (kev ntxhov siab ntev ntawm qhov kub siab, kev hloov pauv, kev hloov pauv nkag mus).
Titanium (Ti): Titanium yog ib qho deoxidizer muaj zog hauv 254SMO hlau. Nws tuaj yeem ua rau cov qauv sab hauv ntawm cov hlau ntom, txhim kho lub zog ntawm cov noob; txo qhov kev laus rhiab heev thiab qhov txias brittleness. Txhim kho kev ua haujlwm vuam. Ntxiv cov titanium tsim nyog rau chromium 18 nickel 9 austenitic stainless hlau tiv thaiv intergranular corrosion.
Chromium (Cr): Chromium tuaj yeem txhim kho qhov corrosion tsis kam ntawm cov hlau thiab yog li ntawd yog ib qho tseem ceeb alloying ntawm 254SMO stainless hlau thiab cov hlau kub-resistant.
Tooj Liab (Cu): Tooj Liab tuaj yeem ua rau lub zog thiab kev tawv ntxiv, tshwj xeeb tshaj yog thaum muaj kev xeb hauv huab cua. Qhov tsis zoo yog tias qhov kub hnyiab feem ntau tshwm sim thaum ua haujlwm kub thiab qhov yas ntawm tooj liab tshaj 0.5%. Thaum cov ntsiab lus tooj liab tsawg dua 0.50%, tsis muaj kev cuam tshuam rau qhov solderability ntawm 254SMO khoom siv.
Raws li qhov sib txawv ntawm cov khoom tseem ceeb saum toj no, cov hom 254SMO nickel alloys hauv qab no tuaj yeem siv tau:
1. Nickel-tooj liab (Ni-Cu) hlau, tseem hu ua Monel hlau (Monel hlau)
2. Nickel-chromium (Ni-Cr) alloy yog ib qho alloy uas tiv taus cua sov uas muaj nickel ua.
3. Ni-Mo alloy feem ntau yog hais txog Hastelloy B series
4. Ni-Cr-Mo alloy feem ntau yog hais txog Hastelloy C series
254SMO siv rau hauv ntau yam khoom siv hauv kev lag luam, nws siv sab hauv ntawm cov nplooj ntoos hlav, cov nplooj ntoos hlav coil, cov khoom sib khi, cov pa tawm hauv tsheb, cov khoom siv hloov pauv catalytic, EGR txias, turbochargers thiab lwm yam gaskets tiv taus cua sov, dav hlau Austenitic stainless hlau phaj siv rau cov khoom sib koom ua ke.
Tshwj xeeb, ib feem ntawm daim ntawv thov rau ntau yam khoom siv hauv kev lag luam, cov pa roj carbon dioxide hauv tsheb, thiab lwm yam siv rau hauv qhov kub siab siv NPF625 thiab NCF718 teev nyob rau hauv JIS G 4902 (corrosion-resistant thiab heat-resistant superalloy phaj) kom muaj cov feem pua ntawm qhov hnyav. Nws yog ntau dua 50% ntawm cov khoom kim heev ntawm Ni. Ntawm qhov tod tes, rau cov ntaub ntawv xws li precipitation-enhanced stainless hlau xws li SUH660 uas siv intermetallic compounds ntawm Ti thiab Al teev nyob rau hauv JIS G 4312 (heat-resisting steel phaj), qhov nyuaj ntawm 254 SMO txo qis heev thaum siv ntev ntawm qhov kub siab, thiab tsuas yog siv txog li 500 ° C tsis txaus siab rau cov yam ntxwv xav tau rau cov cua sov-resistant gaskets uas tau txhawb nqa los ntawm qhov kub siab hauv xyoo tas los no.
Hom: 254SMO
Cov qauv hauv tebchaws: 254SMO/F44 (UNS S31254/W.Nr.1.4547)
Cov Neeg Koom Tes: Outokumpu, AVESTA, Hastelloy, SMC, ATI, Lub Tebchaws Yelemees, ThyssenKrupp VDM, Mannex, Nickel, Sandvik, Sweden Nyiv Metallurgical, Nippon Steel thiab lwm yam npe nrov
Hom Asmeskas: UNS S31254
Txheej txheem cej luam ntawm 254SMo (S31254): Ib qho hlau stainless hlau super austenitic. Vim nws cov ntsiab lus molybdenum siab, nws muaj kev tiv thaiv siab heev rau kev xeb pitting thiab crevice. 254SMo stainless hlau tau tsim thiab tsim los siv rau hauv cov chaw muaj halide xws li dej hiav txwv.
254SMo (S31254) Super Stainless Steel yog ib hom hlau stainless tshwj xeeb. Nws txawv ntawm cov hlau stainless ib txwm hauv cov tshuaj lom neeg. Nws yog hais txog cov hlau stainless uas muaj nickel ntau, chromium ntau, thiab molybdenum ntau. Super stainless steel, nickel-based alloy yog ib hom hlau stainless tshwj xeeb, thawj cov tshuaj lom neeg sib txawv ntawm cov hlau stainless ib txwm, yog hais txog cov hlau stainless uas muaj nickel ntau, chromium ntau, thiab molybdenum ntau. Qhov zoo dua yog 254Mo, uas muaj 6% Mo. Hom hlau no muaj kev tiv thaiv zoo rau kev xeb hauv zos. Nws muaj kev tiv thaiv zoo rau kev xeb pitting hauv qab dej hiav txwv, aeration, qhov sib txawv, thiab cov xwm txheej erosion qis (PI ≥ 40) thiab kev ntxhov siab corrosion zoo dua, lwm cov ntaub ntawv rau Ni-based alloys thiab titanium alloys. Qhov thib ob, hauv qhov kub siab lossis kev ua haujlwm tiv thaiv corrosion, muaj kev tiv thaiv zoo dua rau qhov kub siab lossis kev tiv thaiv corrosion, yog 304 stainless hlau tsis tuaj yeem hloov pauv. Tsis tas li ntawd xwb, los ntawm kev faib tawm ntawm cov hlau tsis xeb, cov qauv hlau tshwj xeeb ntawm cov hlau tsis xeb yog cov qauv hlau austenite ruaj khov. Vim tias cov hlau tsis xeb tshwj xeeb no yog ib hom khoom siv high-alloy, nws nyuaj heev hauv cov txheej txheem tsim khoom. Feem ntau, tib neeg tsuas tuaj yeem cia siab rau cov txheej txheem ib txwm los tsim cov hlau tsis xeb tshwj xeeb no, xws li nchuav, forging, dov thiab lwm yam.
Tib lub sijhawm nws muaj cov yam ntxwv ntawm kev kub siab ua haujlwm raws li nram no:
1. Muaj ntau qhov kev sim hauv thaj teb thiab kev paub dhau los qhia tau tias txawm tias qhov kub me ntsis siab, 254SMO muaj kev tiv thaiv corrosion siab hauv dej hiav txwv, thiab tsuas yog ob peb hom stainless hlau muaj cov khoom no.
2. Qhov kev tiv thaiv xeb ntawm 254SMO hauv cov kua qaub thiab cov tshuaj oxidizing halide xws li cov uas xav tau rau kev tsim cov tshuaj dawb raws li ntawv tuaj yeem piv rau cov hlau nickel-base thiab titanium alloys uas tiv taus xeb heev.
Lub sijhawm tshaj tawm: Plaub Hlis-24-2018