Isingeniso
I-Duplex 2205 insimbi engagqwali (kokubili i-ferritic ne-austenitic) isetshenziswa kakhulu ezinhlelweni ezidinga ukumelana nokugqwala okuhle namandla.Insimbi engagqwali yezinga le-S31803 iye yabhekana nenani lokuguqulwa okuholele ku-UNS S32205, futhi yagunyazwa ngonyaka we-1996. Leli banga linikeza ukumelana okuphezulu nokugqwala.
Emazingeni okushisa angaphezu kuka-300°C, izakhi ezincane zaleli banga zithola imvula, futhi emazingeni okushisa angaphansi kuka -50°C ama-micro-constituents adlulela ku-ductile-to-brittle transition;yingakho leli banga lensimbi engagqwali alifanele ukusetshenziswa kulawa mazinga okushisa.
Izakhiwo Eziyinhloko
Insimbi Engagqwali - Ibanga 2205 Duplex (UNS S32205)
Izakhiwo ezishiwo kumathebula angezansi ziphathelene nemikhiqizo egoqelwe isicaba njengamapuleti, amashidi namakhoyili e-ASTM A240 noma i-A240M.Lokhu kungase kungafani kweminye imikhiqizo efana namabha namapayipi.
Ukwakheka
Insimbi Engagqwali - Ibanga 2205 Duplex (UNS S32205)
Ithebula 1 lihlinzeka ngezigaba zokuqamba zebanga lama-2205 insimbi engagqwali eyi-duplex.
Ithebula 1- Ukwakheka kobubanzi bezinsimbi ezingagqwali ezingama-2205
| Ibanga | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| I-2205 (S31803) | Okuncane Ubukhulu | - 0.030 | - 2.00 | - 1.00 | - 0.030 | - 0.020 | 21.0 23.0 | 2.5 3.5 | 4.5 6.5 | 0.08 0.20 |
| I-2205 (S32205) | Okuncane Ubukhulu | - 0.030 | - 2.00 | - 1.00 | - 0.030 | - 0.020 | 22.0 23.0 | 3.0 3.5 | 4.5 6.5 | 0.14 0.20 |
Izakhiwo Zemishini
Izakhiwo ezijwayelekile zemishini zebanga lama-2205 zensimbi ezingenasici zibalwe kuthebula elingezansi.IBanga S31803 linezinto zomshini ezifanayo nalezo ze-S32205.
Ithebula 2- Izakhiwo zikaMechanical zama-2205 grade stainless steels
| Ibanga | I-Tensile Str | Isivuno Amandla | Ukwelula | Ukuqina | |
| I-Rockwell C (HR C) | Brinell (HB) | ||||
| 2205 | 621 | 448 | 25 | 31 ubuningi | 293 ubuningi |
Izakhiwo Zomzimba
Insimbi Engagqwali - Ibanga 2205 Duplex (UNS S32205)
Izakhiwo ezibonakalayo zebanga le-2205 lezinsimbi ezingenasici zibhalwe ngezansi.IBanga S31803 linezinto ezibonakalayo ezifanayo nalezo ze-S32205.
Ithebula 3- Izakhiwo ezingokomzimba zezinsimbi ezingenasici ezingama-2205
| Ibanga | Ukuminyana | I-Elastic (GPA) | Kusho i-Co-eff ye-Thermal | Okushisayo | Specific (J/kg.K) | Ezogesi | |||
| 0-100°C | 0-315°C | 0-538°C | ku-100°C | ku-500°C | |||||
| 2205 | 7800 | 190 | 13.7 | 14.2 | - | 19 | - | 418 | 850 |
Ukuqhathaniswa Kwencazelo Yebanga
Insimbi Engagqwali - Ibanga 2205 Duplex (UNS S32205)
Ithebula lesi-4 linikeza ukuqhathaniswa kwebanga lezinsimbi ezingenasici ezingama-2205.Amanani awukuqhathaniswa kwezinto ezisebenzayo ezifanayo.Okufana ncamashí kungase kutholakale emibhalweni yokuqala.
Ithebula 4-Ukuqhathaniswa kokucaciswa kwebanga kwezinsimbi ezingenasici zebanga lama-2205
| Ibanga | I-UNS | Old British | I-Euronorm | IsiSwidi SS | IsiJapane I-JIS | ||
| BS | En | No | Igama | ||||
| 2205 | I-S31803 / S32205 | 318S13 | - | 1.4462 | X2CrNiMoN22-5-3 | 2377 | I-SUS 329J3L |
Amanye Amabanga Angenzeka
Okunikezwe ngezansi uhlu lwamamaki ahlukile okungenzeka akhethwe, angakhethwa esikhundleni sika-2205.
Ithebula 5-Ukuqhathaniswa kokucaciswa kwebanga kwezinsimbi ezingenasici zebanga lama-2205
| Ibanga | Izizathu zokukhetha ibanga |
| 904L | Kudingeka ukwakheka okungcono, okunokumelana nokugqwala okufanayo namandla aphansi. |
| UR52N+ | Kudingeka ukumelana nokugqwala okuphezulu, isb ukumelana nezinga lokushisa eliphakeme lamanzi olwandle. |
| 6%Mo | Kudingeka ukumelana nokugqwala okuphezulu, kodwa ngamandla aphansi kanye nokubunjwa okungcono. |
| 316L | Ukumelana nokugqwala okuphezulu namandla we-2205 akudingekile.I-316L yizindleko eziphansi. |
Ukumelana Nokugqwala
Izindaba Ezihlobene
I-Grade 2205 insimbi engagqwali ikhombisa ukumelana nokugqwala okuhle kakhulu, okuphakeme kakhulu kunalelo lebanga lama-316. Imelana nezinhlobo zokugqwala zendawo ezifana ne-intergranular, i-crevice kanye ne-pitting.I-CPT yalolu hlobo lwensimbi engagqwali icishe ibe ngu-35°C.Leli banga liyamelana ne-chloride stress corrosion cracking (SCC) emazingeni okushisa angu-150°C.Izinsimbi ze-Stainless Grade 2205 ziwushintsho olufanele lwamamaki e-austenitic, ikakhulukazi ezindaweni zokuhluleka ngaphambi kwesikhathi nasezindaweni zasolwandle.
Ukumelana Nokushisa
Isakhiwo esiphezulu sokumelana ne-oxidation yeBanga lama-2205 sonakaliswe ukwakheka kwayo okungaphezu kuka-300°C.Lokhu embrittlement kungashintshwa ngokwelashwa okugcwele kwe-annealing.Leli banga lenza kahle emazingeni okushisa angaphansi kuka-300°C.
Ukwelashwa Kokushisa
Ukwelashwa kokushisa okufanele kakhulu kwaleli banga ukwelashwa kwesixazululo (i-annealing), phakathi kuka-1020 - 1100°C, okulandelwa ukupholisa ngokushesha.IBanga 2205 lingasebenza kanzima kodwa alikwazi ukwenziwa lukhuni ngezindlela ezishisayo.
Ukushisela
Izindlela eziningi zokushisela ezijwayelekile zifanelana naleli banga, ngaphandle kokushisela ngaphandle kwezinsimbi zokugcwalisa, okuphumela ku-ferrite eyeqile.I-AS 1554.6 ifanelekela ngaphambili i-welding engu-2205 ngezinduku noma ama-electrode angu-2209 ukuze insimbi ediphozithi ibe nesakhiwo se-duplex esilinganayo.
Ukwengeza i-nitrogen kwigesi evikelayo kuqinisekisa ukuthi i-austenite eyanele yengezwa esakhiweni.Ukufakwa kokushisa kufanele kugcinwe ezingeni eliphansi, futhi ukusetshenziswa kokushisa kwangaphambili noma okuthunyelwe kufanele kugwenywe.Ukusebenza ngokubambisana kokunwetshwa kokushisa kwaleli banga kuphansi;ngakho-ke ukuhlanekezela nokucindezeleka kuncane kunalokhu kumabanga we-austenite.
Ukwenza imishini
I-machinability yaleli banga iphansi ngenxa yamandla alo aphezulu.Isivinini sokusika sicishe sibe ngama-20% esingaphansi kwalesi sebanga lama-304.
Ukwenziwa
Ukwakhiwa kwaleli banga nakho kuthinteka ngamandla alo.Ukugoba nokwakhiwa kwaleli banga kudinga okokusebenza okunamandla amakhulu.I-Ductility yebanga le-2205 incane kunamamaki e-austenitic;ngakho-ke, isihloko esibandayo asinakwenzeka kuleli banga.Ukuze wenze imisebenzi yesihloko esibandayo kuleli banga, ukuhushula okuphakathi kufanele kwenziwe.
Izinhlelo zokusebenza
Ezinye zezinhlelo ezijwayelekile ze-duplex steel grade 2205 zibalwe ngezansi:
- Ukuhlola uwoyela negesi
- Imishini yokucubungula
- Ezokuthutha, ukugcinwa kanye nokucubungula amakhemikhali
- I-chloride ephezulu nezindawo zasolwandle
- Imishini yamaphepha, amathange otshwala, i-pulp kanye nezigaya zamaphepha
Isikhathi sokuthumela: Mar-11-2023