Cov khoom zoo 254SMO ib txwm muaj tus qauv zoo tshaj plaws hauv nws cov tshuaj muaj pes tsawg leeg, txhua yam muaj nws tus kheej ua haujlwm:
Nickel (Ni): Nickel tuaj yeem ua kom lub zog ntawm 254SMO hlau thaum tuav cov yas zoo thiab tawv. Nickel muaj kev tiv thaiv corrosion siab rau cov kua qaub thiab alkalis, thiab muaj xeb thiab kub ua haujlwm ntawm qhov kub thiab txias.
Molybdenum (Mo): Molybdenum tuaj yeem kho cov nplej ntawm 254SMO steel, txhim kho lub zog hardenability thiab thermal zog, thiab tswj kom muaj zog txaus thiab nkag mus rau qhov kub thiab txias (ntev ntev ntawm qhov kub thiab txias, deformation, creeping hloov).
Titanium (Ti): Titanium yog lub zog deoxidizer hauv 254SMO steel. Nws tuaj yeem ua rau cov qauv sab hauv ntawm cov hlau ntom, ua kom muaj cov hmoov nplej zom; txo cov laus rhiab heev thiab txias brittleness. Txhim kho vuam kev ua tau zoo. Ntxiv qhov tsim nyog titanium rau chromium 18 npib tsib xee 9 austenitic stainless hlau tiv thaiv intergranular corrosion.
Chromium (Cr): Chromium tuaj yeem txhim kho corrosion ntawm cov hlau thiab yog li ntawd yog ib qho tseem ceeb alloying ntawm 254SMO stainless hlau thiab kub-resistant hlau.
Copper (Cu): tooj liab tuaj yeem ua rau muaj zog thiab tawv, tshwj xeeb tshaj yog nyob rau hauv atmospheric corrosion. Qhov tsis zoo yog tias kub brittleness yuav tshwm sim thaum kub ua hauj lwm thiab cov yas ntawm tooj liab ntau tshaj 0.5%. Thaum cov ntsiab lus tooj liab tsawg dua 0.50%, tsis muaj kev cuam tshuam rau cov khoom siv ntawm 254SMO.
Raws li qhov sib txawv ntawm cov khoom tseem ceeb saum toj no, cov nram qab no hom 254SMO nickel alloys tuaj yeem siv tau:
1. Nickel-tooj liab (Ni-Cu) alloy, tseem hu ua Monel alloy (Monel alloy)
2. Nickel-chromium (Ni-Cr) alloy yog nickel-raws li kub-resistant alloy.
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 yog siv nyob rau hauv ntau yam khoom siv, nws siv sab hauv ntawm nplooj springs, coil springs, sealing qhov chaw, automotive tso manifolds, catalytic converters, EGR coolers, turbochargers thiab lwm yam tshav kub-resistant gaskets, aircraft Austenitic stainless hlau daim hlau yog siv rau kev sib koom ua ke.
Tshwj xeeb, ib feem ntawm cov ntawv thov rau ntau yam khoom siv, tsheb tso pa gaskets, thiab lwm yam siv nyob rau hauv qhov kub siab siv NPF625 thiab NCF718 tau teev tseg hauv JIS G 4902 (corrosion-resistant thiab heat-resistant superalloy phaj) kom muaj cov feem pua ntawm cov khoom loj. Nws yog ntau tshaj 50% ntawm cov khoom kim heev ntawm Ni. Ntawm qhov tod tes, rau cov ntaub ntawv xws li nag lossis daus-txhim kho stainless hlau xws li SUH660 uas siv intermetallic compounds ntawm Ti thiab Al teev nyob rau hauv JIS G 4312 (heat-resisting steel phaj), hardness ntawm 254 SMO yuav txo tau zoo heev thaum siv mus ntev. lub sij hawm ntawm qhov kub thiab txias, thiab tsuas yog Kev siv txog li 500 ° C tsis txaus siab rau cov yam ntxwv uas yuav tsum tau ua rau cov cua kub-tiv thaiv gaskets uas tau nce los ntawm qhov kub siab hauv xyoo tas los no.
Qauv: 254SMO
Teb chaws tus qauv: 254SMO/F44 (UNS S31254/W.Nr.1.4547)
Cov neeg koom tes: Outokumpu, AVESTA, Hastelloy, SMC, ATI, Lub teb chaws Yelemees, ThyssenKrupp VDM, Mannex, Nickel, Sandvik, Sweden Nyiv Metallurgical, Nippon Steel thiab lwm yam nto moo hom
American hom: UNS S31254
Txheej txheem cej luam ntawm 254SMO (S31254): Super austenitic stainless hlau. Vim nws cov ntsiab lus molybdenum siab, nws muaj qhov ua haujlwm siab heev rau pitting thiab crevice corrosion. 254SMo stainless hlau tau tsim thiab tsim los siv rau hauv qhov chaw muaj halide xws li dej hiav txwv.
254SMO (S31254) Super Stainless hlau yog ib hom tshwj xeeb ntawm stainless hlau. Nws txawv ntawm cov hlau tsis muaj hlau zoo tib yam hais txog cov tshuaj muaj pes tsawg leeg. Nws hais txog cov hlau tsis xeb hlau uas muaj cov nickel siab, siab chromium, thiab molybdenum siab. Super stainless hlau, npib tsib xee-raws li alloy yog ib hom tshwj xeeb ntawm stainless hlau, thawj cov tshuaj muaj pes tsawg leeg yog txawv los ntawm cov zoo tib yam stainless hlau, hais txog ib tug siab alloy uas muaj cov nickel siab, siab chromium, high-molybdenum stainless hlau. Qhov zoo dua yog 254Mo, uas muaj 6% Mo. Cov hlau no muaj kev tiv thaiv zoo heev rau hauv cheeb tsam corrosion. Nws muaj kev tiv thaiv zoo rau pitting corrosion nyob rau hauv dej hiav txwv, aeration, qhov khoob, thiab qis-ceev yaig tej yam kev mob (PI ≥ 40) thiab zoo zog corrosion kuj, lwm yam ntaub ntawv rau Ni-based alloys thiab titanium alloys. Thib ob, nyob rau hauv qhov kub thiab txias los yog corrosion kuj ua tau zoo, muaj kev tiv thaiv zoo rau qhov kub thiab txias, yog 304 stainless hlau tsis tuaj yeem hloov tau. Tsis tas li ntawd, los ntawm kev faib tawm ntawm stainless hlau, tshwj xeeb stainless hlau metallographic qauv yog ib tug ruaj khov austenite metallographic qauv. Vim tias qhov tshwj xeeb stainless hlau no yog cov khoom siv high-alloy, nws nyuaj heev rau kev tsim khoom. Feem ntau, tib neeg tuaj yeem tso siab rau cov txheej txheem ib txwm ua los tsim cov hlau tsis muaj steel tshwj xeeb, xws li nchuav, forging, dov thiab lwm yam.
Nyob rau tib lub sijhawm nws muaj cov yam ntxwv ntawm kev kub siab ua haujlwm raws li hauv qab no:
1. Muaj ntau qhov kev sim thiab kev paub dhau los qhia tau tias txawm tias qhov kub siab me ntsis, 254SMO muaj kev tiv thaiv corrosion siab hauv dej hiav txwv, thiab tsuas yog ob peb hom stainless hlau muaj cov cuab yeej no.
2. Lub corrosion kuj ntawm 254SMO nyob rau hauv acidic daws thiab oxidizing halide cov kev daws teeb meem xws li cov uas yuav tsum tau rau daim ntawv-raws li bleach ntau lawm yuav muab piv rau nickel-base alloys thiab titanium alloys uas yog heev resistant rau corrosion.
Post lub sij hawm: Apr-24-2018