F51, F53, F55, F60 ndi F61 ndi ma duplex komanso super duplex zosapanga dzimbiri zotengedwa kuchokera ku ASTM A182. Muyezo uwu ndi umodzi mwa mfundo zomwe zimatchulidwa kwambiri popereka zitsulo zosapanga dzimbiri.
American Society of Testing and Equipment (ASTM) ndi imodzi mwamabungwe akuluakulu padziko lonse lapansi omwe ali ndi miyezo yapamwamba kwambiri padziko lonse lapansi, akuwunikanso, kugwirizanitsa ndi kusindikiza miyezo yaukadaulo yazinthu zambiri zomwe zikuchulukirachulukira. Miyezo yosindikizidwa kuyambira ndi chilembo 'A' zitsulo zoyambira.
Standard ASTM A182 ('Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Forged Fittings, and Mavavu and Parts for High-Temperature Service') tsopano ili mu kope lake la 19th (2019). M'kati mwa zolembedwazi, ma aloyi atsopano awonjezedwa ndikupatsidwa nambala yatsopano ya 'grade'. Chiyambi cha 'F' chikuwonetsa kufunikira kwa mulingo uwu kuzinthu zabodza. Kumayambiriro kwa manambala kumagawika pang'ono ndi mtundu wa aloyi mwachitsanzo austenitic, martensitic, koma silolemba kwathunthu. Zomwe zimatchedwa 'Ferritic-Austenitic' zitsulo zapawiri zimawerengedwa pakati pa F50 ndi F71, ndipo manambala okwera pang'ono akuyandikira magiredi owonjezera posachedwapa.
Magulu Osiyanasiyana a Duplex Stainless Steels
ASTM A182 F51 ikufanana ndi UNS S31803. Awa anali mawu oyamba a 22% Cr duplex chitsulo chosapanga dzimbiri. Komabe, monga tafotokozera m'nkhani yapitayi, opanga adakongoletsa zomwe zidapangidwa mpaka kumapeto kwa malire kuti zithandizire kukana dzimbiri. Gululi, lomwe lili ndi mawonekedwe olimba, limatchedwa F60, lofanana ndi UNS S32205. Chifukwa chake, S32205 ikhoza kukhala yotsimikizika ngati S31803 koma osati mosinthanitsa. Imawerengera pafupifupi 80% yazopanga zonse zaduplex zosapanga dzimbiri. Langley Alloys stockSanmac 2205, chomwe ndi katundu wa Sandvik yemwe amapereka 'machinability yowonjezera monga muyezo'. Zogulitsa zathu zimayambira ½” mpaka 450mm m'mimba mwake mipiringidzo yolimba, kuphatikiza zitsulo zopanda kanthu ndi mbale nazonso.
ASTM A182 F53 ikufanana ndi UNS S32750. Ichi ndi 25% Cr super duplex chitsulo chosapanga dzimbiri chomwe chimalimbikitsidwa kwambiri ndi Sandvik ngatiSAF2507. Ndi kuchuluka kwa chromium poyerekeza ndi F51 kumapereka kukana kwa dzimbiri. Mphamvu zokolola zimakhalanso zapamwamba, zomwe zimalola opanga chigawo kuti achepetse kukula kwa magawo a ntchito zonyamula katundu. Langley Alloys imasunga mipiringidzo yolimba ya SAF2507 kuchokera ku Sandvik, kukula kwake kuchokera ½ "mpaka 16" awiri.
ASTM A182 F55 ikufanana ndi UNS S32760. Magwero a giredi iyi atha kutsatiridwa ndi chitukuko cha Zeron 100 lolemba Platt & Mather, Manchester UK. Ndi chitsulo china chosapanga dzimbiri chosapanga dzimbiri chopangidwa ndi 25% Cr, koma ndikuwonjezera kwa tungsten. Langley Alloys stockSAF32760mipiringidzo yolimba yochokera ku Sandvik, kukula kwake kuchokera ½ "mpaka 16" awiri.
ASTM A182 F61 ikufanana ndi UNS S32550. Izi, ndikuyerekeza kwa Ferralium 255, chitsulo choyambirira chosapanga dzimbiri chopangidwa ndi super duplex chopangidwa ndiLangley Alloys. Chokhazikitsidwa mu 1969, tsopano chapereka zaka zoposa 50 ntchito yopambana m'mafunso osiyanasiyana ovuta. Poyerekeza ndi F53 ndi F55 imapereka mphamvu zowonjezera ndikuchita dzimbiri. Mphamvu zake zochepa zokolola zimaposa 85ksi, pomwe magiredi ena amangokhala 80ksi. Kuphatikiza apo, imakhala ndi mpaka 2.0% yamkuwa, yomwe imathandizira kukana dzimbiri. Langley Alloys stockFerralium 255-SD50kukula kwake kuchokera ku 5/8 "mpaka 14" m'mimba mwake molimba, kuphatikiza mbale mpaka 3" makulidwe.
Nthawi yotumiza: Mar-06-2020