Duplex UNS S31803
Duplex UNS S31803 Lintlha tsa Teknoloji
Kakaretso
Duplex ke motsoako oa austenitic ferritic Iron Chromium-Nickel alloy e kenyelletsoeng Molybdenim. E na le khanyetso e ntle ea pitting, matla a phahameng a tsitsipano le khanyetso e phahameng ea khatello ea maikutlo ho phatloha hoa mocheso o itekanetseng ho ea ho litšepe tse tloaelehileng tsa austenitic.
Duplex ke thepa e nang le tekanyo e lekanang ea austenite le ferrite. Tsena li kopanya khanyetso e ntle ea kutu le matla a phahameng. Mehaho ea mochini e batla e imenne habeli ea tšepe e le 'ngoe ea austenitic mme ho hanyetsa khatello ea maikutlo ho senyeha ho phahametse mofuta oa 316 tšepe e sa hloekang ka tharollo ea chloride. Lisebelisoa tsa Duplex li na le phetoho ea ductile / brittle hoo e ka bang -50 ° C. Tšebeliso e phahameng ea mocheso hangata e lekanyelitsoe ho mocheso o phahameng oa 300 ° C bakeng sa tšebeliso e sa lekanyetsoang ka lebaka la embrittlement.
Melemo
Ho na le melemo e mengata ea Duplex ho kenyelletsa:
Matla a Phahameng
Khanyetso e phahameng ea pitting, khanyetso ea kutu ea crevice
Ho hanyetsa ho hoholo ha khatello ea maikutlo ho senyeha ha kutu, mokhathala le khoholeho ea mobu
Ho hanyetsa ho hoholo ha Chloride stress corrosion cracking
Katoloso e tlase ea mocheso le mocheso o phahameng oa mocheso ho feta litšepe tsa Austenitic
Ho monya matla a phahameng
Ho sebetsa hantle le weldability
Lisebelisoa
Pipe - ASTM A790
Mokhoa oa ho etsa o ka ba o se nang seam kapa oa othomathiki, o se na tlatsetso ea tšepe ea ho tlatsa. Pipe e ka 'na ea chesa kapa ea bata e felile empa e tlameha ho lula e fanoe e le boemong ba mocheso.
BUTT WELD - ASTM A815
Sehlopha sena se akaretsa sehlopha sa WP, se entsoeng ka lihlopha tsa 4 le ho finyella litlhoko tsa ANSI B16.9. Litekanyetso tsa khatello li tšoana hantle le phaephe e ts'oanang.
Lihlopha :-
WP-S : Kaho e se nang Seam
WP-W : Kaho e cheselitsoeng moo litšepe tsa kaho li etsoang ka radiographed
WP-WX : Kaho e cheselitsoeng moo li-welds tsohle li hlahisoang ka radiograph
WP-WU : Kaho ea Welded moo li-al welds li Lekoang ka Ultrasonically.
Flanges ASTM A182
Litlhaloso tsa ASTM li laola lisebelisoa tse tala tse lumelletsoeng tseo li-flange li ka etsoang ka tsona. Liphaephe tse entsoeng ka tšepe tse entsoeng ka tšepe tse entsoeng kapa tse phuthoang, li-fittings le li-valve bakeng sa lisebelisoa tse phahameng tsa mocheso.
Li-valve ASTM A890 Kereiti ea 5A
Tlhaloso e Tloaelehileng ea Castings, lron-Chromium-Nickel-Molybdenum Corrosion-
E hanyetsanang, Duplex (Austenitic/Ferritic) bakeng sa Kopo e Akaretsang'
Lintlha tsa Tekheniki
CHEMICAL COMPOSITION (Litekanyetso tsohle li holimo ntle le ha ho boletsoe ka tsela e 'ngoe)
| %C | %Cr | %Ho | %Mo | %Mn | %S | %P | %Mme | %N |
| 0.03 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 2.00 | 0.02 | 0.03 | 1.00 | 0.08-0.2 |
LITŠOANTŠISO MOCHEFE
| Kotulo Matla | Matla a tšepe | Elongation (Bonyane) | Phokotso ea Sebaka (Bonyane) | Ho thatafala (Boholo)* |
| Ksi/Mpa | Ksi/Mpa | BHN | ||
| 65/450 | 60/620 | 20 | 290 |
*(Tlhahlobo ea morao-rao ea NACE MR-01-75 e ka fokotsa boima ba lits'ebetso tse itseng)
PREn (PITTING RESISTANCE EQUIVALENT) – (%Cr) + (3.3 x %Mo) + (16 x %N)
PHEKO EA MOCHESO: THAROLLO E ANNEALED HO 1020 DEG C - 1100 DEG C CENCH TSA METSI
LIKREITI TSE LEKANANANG +
| US | BS EN | SWEDEN SS | JEREMANE DIN | FAKA TSOHLE | SANDVIK |
| 31803 | 1.4462 | 2377 | X2 CrNiMoN 22.5.3 | Z2 CND 22.05.03 | SAF 2205 |
Nako ea poso: Aug-11-2022