Duplex idafite ibyuma bingana na> 80% yo gukoresha duplex, super duplex na hyper duplex amanota.Yatunganijwe mu myaka ya za 1930 kugirango ikoreshwe mu mpapuro na pulp, duplex alloys ishingiye kuri 22% Cr igizwe na austenitike ivanze: microstructure ferritic itanga ibikoresho byubukanishi.
Ugereranije na 304/316 rusange ya austenitis ibyuma bitagira umuyonga, umuryango wamanota ya duplex mubusanzwe uzaba ufite imbaraga inshuro ebyiri kandi utanga kuzamuka gukomeye mukurwanya ruswa.Kongera chromium yibigize ibyuma bitagira umwanda bizongera imbaraga zo kurwanya ruswa.Nyamara, Piting Resistance ihwanye numubare (PREN) winjiza ibinyomoro birwanya ruswa kandi harimo nibindi bintu byinshi muburyo bwayo.Ubu buryo bworoshye bushobora gukoreshwa mugusobanura uburyo itandukaniro riri hagati ya UNS S31803 na UNS S32205 ryateye imbere niba ari ngombwa.
Nyuma yiterambere rya duplex idafite ibyuma, ibisobanuro byabo byafashwe nka UNS S31803.Nyamara, abatari bake bayobora ibicuruzwa bahoraga batanga iki cyiciro kugeza kumpera yo hejuru yemewe.Ibi byagaragazaga icyifuzo cyabo cyo kugwiza imikorere ya ruswa, ifashijwe niterambere ryogukora ibyuma bya AOD byemerera kugenzura neza ibihimbano.Mubyongeyeho, yemereye kandi urwego rwa azote yongeweho kugira uruhare, aho kuba gusa nkibintu byimbere.Kubwibyo, urwego rwo hejuru rwa duplex rwashatse kongera urugero rwa chromium (Cr), molybdenum (Mo) na azote (N).Itandukaniro riri hagati ya duplex alloy ibice byayo bihura hepfo yibisobanuro, bitandukanye nimwe ikubita hejuru yibisobanuro birashobora kuba ingingo nyinshi zishingiye kuri formula PREN =% Cr + 3.3% Mo + 16% N.
Mu rwego rwo gutandukanya ibyuma bya duplex bitagira ibyuma byakozwe ku mpera yo hejuru y’ibigize, hashyizweho ikindi gisobanuro, aricyo UNS S32205.Duplex ibyuma bidafite ingese bikozwe kuri S32205 (F60) byujuje byuzuye S31803 (F51), mugihe ibinyuranye atari ukuri.Kubwibyo S32205 irashobora kwemezwa kabiri nka S31803.
| Icyiciro | Ni | Cr | C | P | N | Mn | Si | Mo | S |
| S31803 | 4.5-6.5 | 21.0-23.0 | Max 0.03 | Max 0.03 | 0.08-0.20 | Max 2.00 | Max 1.00 | 2.5-3.5 | Max 0.02 |
| S32205 | 4.5-6.5 | 22-23.0 | Max 0.03 | Max 0.03 | 0.14-0.20 | Max 2.00 | Max 1.00 | 3.0-3.5 | Max 0.02 |
SAKYSTEEL ibitse urwego rwuzuye rwa duplex idafite ibyuma nkumufatanyabikorwa wo gukwirakwiza Sandvik.Duteganyiriza S32205 mubunini kuva 5/8 ″ kugeza kuri 18 ″ diametre mu ruziga ruzengurutse, ibyinshi mubigega byacu bikaba biri mu cyiciro cya Sanmac® 2205, byongeraho 'imashini zongerewe imbaraga nkibisanzwe' mubindi bintu.Twongeyeho, tubitse kandi urutonde rwa S32205 rwuzuye ruva mububiko bwacu bwo mu Bwongereza, hamwe nisahani igera kuri 3 ″ kuva ububiko bwacu bwa Portland, muri Amerika.
Igihe cyo kohereza: Ukwakira-25-2019