Zamtundu wa 254SMO nthawi zonse zimakhala ndi mtengo wabwino kwambiri pamapangidwe ake, gawo lililonse limakhala ndi ntchito yake:
Nickel (Ni): Nickel ikhoza kuonjezera mphamvu ya zitsulo za 254SMO pokhalabe ndi pulasitiki wabwino komanso kulimba. Nickel imakhala ndi kukana kwa dzimbiri ku ma acid ndi alkalis, ndipo imakhala ndi dzimbiri komanso kukana kutentha pakatentha kwambiri.
Molybdenum (Mo): Molybdenum ikhoza kuyeretsa njere ya 254SMO zitsulo, kupititsa patsogolo kuuma ndi kutenthetsa mphamvu, ndikukhalabe ndi mphamvu zokwanira ndi kukwawa kukana pa kutentha kwakukulu (kupsinjika kwa nthawi yaitali pa kutentha kwakukulu, kusinthika, kusintha kwa zokwawa).
Titaniyamu (Ti): Titaniyamu ndi deoxidizer wamphamvu mu zitsulo 254SMO. Ikhoza kupanga mkati mwa chitsulo cholimba, kuyeretsa mphamvu yambewu; kuchepetsa tcheru ukalamba ndi ozizira brittleness. Kupititsa patsogolo ntchito zowotcherera. Kuphatikizika kwa titaniyamu yoyenera ku chromium 18 nickel 9 austenitic chitsulo chosapanga dzimbiri kumalepheretsa dzimbiri la intergranular.
Chromium (Cr): Chromium imatha kupititsa patsogolo kukana kwa chitsulo chifukwa chake ndi gawo lofunikira la alloying la 254SMO chitsulo chosapanga dzimbiri ndi chitsulo chosagwira kutentha.
Mkuwa (Cu): Mkuwa ukhoza kuwonjezera mphamvu ndi kulimba, makamaka pakuwonongeka kwamlengalenga. Choyipa chake ndikuti brittleness yotentha imakonda kuchitika pakugwira ntchito yotentha ndipo pulasitiki yamkuwa imaposa 0.5%. Pamene mkuwa uli wocheperapo 0.50%, palibe zotsatira pa solderability wa zinthu 254SMO.
Kutengera kusiyana kwa zigawo zazikuluzikuluzi, mitundu yotsatirayi ya 254SMO nickel alloys ingagwiritsidwe ntchito:
1. Nickel-copper (Ni-Cu) alloy, yomwe imadziwikanso kuti Monel alloy (Monel alloy)
2. Nickel-chromium (Ni-Cr) aloyi ndi nickel-based alloy yosagwira kutentha.
3. Ni-Mo alloy makamaka amatanthauza Hastelloy B mndandanda
4. Ni-Cr-Mo aloyi makamaka amatanthauza Hastelloy C mndandanda
254SMO imagwiritsidwa ntchito pazida zosiyanasiyana zamafakitale, kugwiritsa ntchito kwake mkati mwa akasupe amasamba, akasupe a koyilo, magawo osindikizira, manifolds otulutsa magalimoto, osinthira othandizira, ma EGR ozizira, ma turbocharges ndi ma gaskets osagwira kutentha, mbale za Austenitic zosapanga dzimbiri zimagwiritsidwa ntchito pazolumikizana.
Makamaka, mbali ya ntchito kwa zida zosiyanasiyana mafakitale, galimoto utsi gaskets, etc. ntchito pansi kutentha ntchito NPF625 ndi NCF718 otchulidwa JIS G 4902 ( dzimbiri zosagwira ndi kutentha zosagwira superalloy mbale) kukhala ndi magawo misa. Ndizoposa 50% zamtengo wapatali wa Ni. Komano, pazinthu monga zitsulo zosapanga dzimbiri zowonjezera mpweya monga SUH660 zomwe zimagwiritsa ntchito mankhwala a intermetallic a Ti ndi Al omwe amatchulidwa mu JIS G 4312 (mbale yachitsulo yosagwira kutentha), kuuma kwa 254 SMO kumachepa kwambiri pamene kumagwiritsidwa ntchito kwa nthawi yaitali pa kutentha kwakukulu, ndipo kokha Kugwiritsa ntchito mpaka kumafunika 500 ° C kusagwirizana ndi kutentha kwa 500 ° zalimbikitsidwa ndi kutentha kwakukulu m'zaka zaposachedwapa.
Mtundu: 254SMO
Miyezo ya dziko: 254SMO/F44 (UNS S31254/W.Nr.1.4547)
Othandizana nawo: Outokumpu, AVESTA, Hastelloy, SMC, ATI, Germany, ThyssenKrupp VDM, Mannex, Nickel, Sandvik, Sweden Japan Metallurgical, Nippon Steel ndi zinthu zina zodziwika bwino.
Mtundu waku America: UNS S31254
Chidule cha 254SMo (S31254): Chitsulo chosapanga dzimbiri cha austenitic. Chifukwa cha kuchuluka kwake kwa molybdenum, imakhala ndi mphamvu yolimbana ndi kupindika komanso kuwonongeka kwa ming'alu. 254SMo zitsulo zosapanga dzimbiri zidapangidwa ndikupangidwa kuti zizigwiritsidwa ntchito m'malo okhala ndi halide monga madzi am'nyanja.
254SMo (S31254) Super Stainless Steel ndi mtundu wapadera wachitsulo chosapanga dzimbiri. Ndizosiyana ndi chitsulo chosapanga dzimbiri wamba potengera kapangidwe kake. Zimatanthawuza chitsulo chosapanga dzimbiri chapamwamba chokhala ndi faifi tambala, high chromium, ndi high molybdenum. Chitsulo chapamwamba chosapanga dzimbiri, aloyi opangidwa ndi faifi ndi mtundu wapadera wachitsulo chosapanga dzimbiri, kapangidwe kake koyamba ndi kosiyana ndi chitsulo chosapanga dzimbiri, chimatanthawuza aloyi wapamwamba wokhala ndi faifi tambala, high chromium, high-molybdenum chitsulo chosapanga dzimbiri. Yabwino kwambiri ndi 254Mo, yomwe ili ndi 6% Mo. Mtundu uwu wachitsulo uli ndi kukana kwabwino kwambiri kwa dzimbiri m'deralo. Imakhala ndi kukana bwino kutsekereza dzimbiri pansi pa madzi a m'nyanja, mpweya, mipata, ndi kukokoloka kwa liwiro lotsika (PI ≥ 40) komanso kukana kukhazikika kwa dzimbiri, zida zina zopangira ma Ni-based alloys ndi titaniyamu. Chachiwiri, mu kutentha kwakukulu kapena kukana kwa dzimbiri, kumakhala bwino kukana kutentha kwambiri kapena kukana kwa dzimbiri, ndi 304 chitsulo chosapanga dzimbiri sichingasinthidwe. Kuphatikiza apo, kuchokera kumagulu azitsulo zosapanga dzimbiri, mawonekedwe apadera achitsulo chosapanga dzimbiri ndi chokhazikika cha austenite metallographic. Chifukwa chitsulo chosapanga dzimbiri chapadera ichi ndi mtundu wa aloyi wapamwamba kwambiri, ndizovuta kwambiri popanga. Nthawi zambiri, anthu amatha kudalira njira zachikhalidwe zopangira chitsulo chosapanga dzimbiri chapadera, monga kuthira, kupangira, kugudubuza ndi zina zotero.
Pa nthawi yomweyo ali ndi makhalidwe a mkulu kutentha kukana motere:
1. Chiwerengero chachikulu cha mayesero a m'munda ndi zochitika zambiri zimasonyeza kuti ngakhale kutentha kwapamwamba pang'ono, 254SMO imakhala ndi kukana kwa corrosion corrosion m'madzi a m'nyanja, ndipo ndi mitundu yochepa chabe ya zitsulo zosapanga dzimbiri zomwe zili ndi katundu uyu.
2. Kukana kwa dzimbiri kwa 254SMO mu njira za acidic ndi oxidizing halide solutions monga zomwe zimafunikira pakupanga bleach-based bleach zitha kufaniziridwa ndi ma alloys a nickel-base ndi titaniyamu omwe amalimbana kwambiri ndi dzimbiri.
Nthawi yotumiza: Apr-24-2018