I-Duplex UNS S31803
I-Duplex UNS S31803 Ulwazi Lobuchwepheshe
Uhlolojikelele
I-Duplex iyingxube ye-austenitic ferritic Iron Chromium-Nickel ene-Molybdenim eyengeziwe. Inokumelana okuhle nokugoba, amandla aqinile aphezulu kanye nokumelana okuphezulu nokucindezela kokugqwala kokuqhekeka emazingeni okushisa aphakathi nendawo kuya kwezinsimbi ezingenasici ze-austenitic ezivamile.
I-Duplex iyinto enenani elilinganayo elilinganayo le-austenite ne-ferrite. Lezi zihlanganisa ukumelana nokugqwala okuhle kakhulu namandla aphezulu. Izakhiwo zemishini zicishe ziphindwe kabili lezo zensimbi eyodwa ye-austenitic futhi ukumelana nokucindezeleka kokuqhekeka kokugqwala kuphakeme kunohlobo lwensimbi engagqwali engu-316 ezixazululweni ze-chloride. I-Duplex material ine-ductile / brittle transition cishe -50°C. Ukusetshenziswa kwezinga lokushisa okuphezulu kuvame ukukhawulelwa ekushiseni okuphezulu okungama-300°C ukuze kusetshenziswe isikhathi esingenamkhawulo ngenxa ye-embrittlement.
Izinzuzo
Kunezinzuzo eziningana ze-Duplex ezihlanganisa:
Amandla Aphakeme
Ukumelana okuphezulu nokugoba, ukumelana nokugqwala kwe-crevice
Ukumelana okuphezulu nokuqhekeka kokugqwala kwengcindezi, ukukhathala nokuguguleka
Ukumelana okuhle kakhulu nokuqhekeka kwe-Chloride stress corrosion
Ukunwetshwa kwe-thermal okuphansi kanye nokushisa okuphezulu kokushisa kunezinsimbi ze-Austenitic
Ukumuncwa kwamandla aphezulu
Ukusebenza okuhle nokushisela
Izinhlelo zokusebenza
Ipayipi – ASTM A790
Indlela yokukhiqiza ingaba i-seamless noma i-othomathikhi ye-welding, ngaphandle kokungezwa kwe-filler metal. Ipayipi lingase lishise noma libanda liqedwe kodwa kufanele lihlale lifakwe esimweni sokwelashwa ngokushisa.
BUTT WELD – ASTM A815
Leli klasi lihlanganisa ikilasi le-WP, elakhiwe izigaba ezi-4 futhi lihlangabezana nezidingo ze-ANSI B16.9. Izilinganiso zokucindezela ziwukuhambisana okufanayo kwepayipi elifanayo.
Izigaba :-
I-WP-S : Ukwakhiwa Okungenazihibe
I-WP-W : Ukwakhiwa Okushiselwe lapho okushisela khona kwenziwa nge-radiograph
I-WP-WX: Ukwakhiwa Okushiselwe lapho wonke ama-welds enziwa nge-radiograph
I-WP-WU : Ukwakhiwa Okushiselwe lapho ama-al weld ahlolwa nge-Ultrasonically.
Flanges ASTM A182
Imininingwane ye-ASTM ilawula izinto zokusetshenziswa ezivunyiwe lapho ama-flange angenziwa khona. Ama-flange amapayipi ensimbi afojiwe noma agingqelwe, izifakelo ezifojiwe namavalvu okusetshenziswa kwezinga lokushisa eliphezulu.
Amavavu ASTM A890 Ibanga 5A
Ukucaciswa Okujwayelekile Kokusakaza, i-lron-Chromium-Nickel-Molybdenum Corrosion-
I-Resistant, i-Duplex (i-Austenitic/Ferritic) yohlelo lokusebenza olujwayelekile'
Imininingwane Yezobuchwepheshe
UKWENZIWA KWEKHEMICAL (Wonke amanani aphezulu ngaphandle kwalapho kushiwo ngenye indlela)
| %C | %Cr | %Ngena | %Mo | %Mn | %S | %P | %Futhi | %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 |
IZIMPAHLA ZEMITHETHO
| Isivuno Amandla | Amandla Okuqina | Ubude (Obuncane) | Ukuncishiswa Kwendawo (Okungenani) | Ukuqina (Ubukhulu)* |
| Ksi/Mpa | Ksi/Mpa | I-BHN | ||
| 65/450 | 60/620 | 20 | 290 |
*(Isibuyekezo sakamuva se-NACE MR-01-75 singakhawulela ubulukhuni kwezinye izinhlelo zokusebenza)
I-PREn (PITTING RESISTANCE EQUIVALENT) – (%Cr) + (3.3 x %Mo) + (16 x %N)
UKWELASHWA OKUSHISA: ISIXAZULULO SIHLANGANISIWE KU-1020 DEG C – 1100 DEG C CENCH AMANZI
AMABANGA ALINGANAYO +
| E-US | BS EN | ESWEDEN SS | EJALIMANE DIN | I-FRANCE AFNOR | SANDVIK |
| 31803 | 1.4462 | 2377 | I-X2 CrNiMoN 22.5.3 | Z2 CND 22.05.03 | I-SAF 2205 |
Isikhathi sokuthumela: Aug-11-2022