F51, F53, F55, F60 na F61 ni duplex na super duplex idafite ibyuma byerekana ibyuma byakuwe muri ASTM A182. Ibipimo ngenderwaho nimwe mubipimo byavuzwe cyane mugutanga ibyuma bitagira umwanda.
Sosiyete y'Abanyamerika ishinzwe ibizamini n'ibikoresho (ASTM) ni umwe mu mashyirahamwe akomeye ku isi, gusuzuma, gukusanya no gutangaza ibipimo bya tekiniki ku bikoresho byinshi bigenda byiyongera. Ibipimo byatangajwe bitangirira ku nyuguti 'A' bitwikiriye ibyuma.
Bisanzwe ASTM A182 ('Ibipimo ngenderwaho byerekana ibihimbano cyangwa byazungurutswe hamwe na flanges y'ibyuma bitagira umuyonga, ibikoresho byahimbwe, hamwe na Valve hamwe nibice bya serivisi yo mu rwego rwo hejuru') ubu biri mu nshuro yayo ya 19 (2019). Mugihe cyibi bisohokayandikiro, ibivanze bishya byongeweho kandi bigenerwa umubare 'urwego' rushya. Imbanzirizamushinga ya 'F' yerekana akamaro k'iki gipimo ku bicuruzwa byahimbwe. Umubare winyongera washyizwe hamwe muburyo bwa alloy ni ukuvuga austenitis, martensitike, ariko ntabwo byanditse rwose. Ibyuma byitwa 'Ferritic-Austenitike' ibyuma bya duplex bibarwa hagati ya F50 na F71, hamwe numubare uzamuka igice ugereranije nicyiciro cya vuba cyongeweho.
Ibyiciro Bitandukanye bya Duplex Ibyuma
ASTM A182 F51 ihwanye na UNS S31803. Nibisobanuro byumwimerere kuri 22% Cr duplex idafite ibyuma. Ariko, nkuko byasobanuwe mu ngingo ibanziriza iyi, abayikora batezimbere ibice bigana ku mpera y’imipaka kugira ngo barwanye ruswa. Uru rwego, hamwe nibisobanuro birambuye, byanditseho nka F60, bihwanye na UNS S32205. Kubwibyo, S32205 irashobora kwemezwa kabiri nka S31803 ariko ntabwo aribyo. Ifite hafi 80% yumusaruro rusange duplex idafite ibyuma. Langley Alloys ububikoSanmac 2205, nicyo gicuruzwa cyihariye cya Sandvik gitanga 'imashini yongerewe imbaraga nkibisanzwe'. Ibicuruzwa byacu biva kuri ½ ”bigera kuri 450mm ya diametre ikomeye, wongeyeho utubari twuzuye na plaque.
ASTM A182 F53 ihwanye na UNS S32750. Nibintu 25% Cr super duplex ibyuma bidafite ibyuma byamamajwe cyane na Sandvik nkukoSAF2507. Hamwe na chromium yiyongereye ugereranije na F51 itanga uburyo bwiza bwo kurwanya ruswa. Imbaraga zitanga umusaruro nazo ziri hejuru, zemerera abashushanya ibice kugabanya ingano yicyiciro kubitwara imitwaro. Langley Alloys ibitse SAF2507 ibibari bikomeye kuva Sandvik, mubunini kuva kuri ½ ”kugeza kuri 16”.
ASTM A182 F55 ihwanye na UNS S32760. Inkomoko y'iki cyiciro irashobora kuva mu iterambere rya Zeron 100 na Platt & Mather, Manchester UK. Nubundi buryo bwa super duplex butagira ibyuma bushingiye kuri 25% Cr, ariko hiyongereyeho tungsten. Langley Alloys ububikoSAF32760utubari dukomeye kuva Sandvik, mubunini kuva ½ ”kugeza kuri 16” diameter.
ASTM A182 F61 ihwanye na UNS S32550. Ibi na byo, ni ikigereranyo cya Ferralium 255, umwimerere wa super duplex idafite ibyuma byahimbwe naLangley Alloys. Yatangijwe mu 1969, ubu imaze gutanga imyaka irenga 50 serivisi nziza muburyo butandukanye bwo gusaba. Ugereranije na F53 na F55 itanga imbaraga ziyongera no gukora ruswa. Imbaraga ntoya yumusaruro urenga 85ksi, mugihe andi manota agarukira kuri 80ksi. Byongeye kandi, irimo 2,2% yumuringa, ifasha kurwanya ruswa. Langley Alloys ububikoFerralium 255-SD50mubunini kuva 5/8 ”kugeza 14” diametre ikomeye, wongeyeho amasahani agera kuri 3 ”.
Igihe cyo kohereza: Werurwe-06-2020