Mephato ea 321 le 347 ke lisebelisoa tsa motheo tsa austenitic 18/8 (Kereiti ea 304) tse tiisitsoeng ke tlatsetso ea Titanium (321) kapa Niobium (347).Limaraka tsena li sebelisoa hobane ha li amehe ho kutu ka har'a granular ka mor'a ho futhumatsa ka har'a mocheso oa carbide oa 425-850 ° C.Kereiti ea 321 ke mofuta oa khetho bakeng sa lits'ebetso tse maemong a mocheso a ka bang 900 ° C, ho kopanya matla a phahameng, ho hanyetsa sekhahla le botsitso ba mohato le ho hanyetsa ho bola ha metsi ho latelang.
Sehlopha sa 321H ke phetoho ea 321 e nang le khabone e phahameng, ho fana ka matla a ntlafetseng a mocheso o phahameng.
Moeli o nang le 321 ke hore titanium ha e fetise hantle ho pholletsa le arc e phahameng ea mocheso, kahoo ha e khothalletsoe e le ts'ebetso ea ho cheselletsa.Tabeng ena sehlopha sa 347 se khethoa - niobium e etsa mosebetsi o tšoanang oa ho tsitsisa carbide empa e ka fetisetsoa ho pholletsa le arc welding.Ka hona, Kereiti ea 347 ke ea maemo a sebelisoang bakeng sa ho cheselletsa 321. Kereiti ea 347 e sebelisoa ka linako tse ling e le lisebelisoa tsa poleiti ea batsoali.
Joalo ka limaraka tse ling tsa austenitic, 321 le 347 li na le litšobotsi tse ntle haholo tsa ho theha le ho tjheseletsa, li na le brake kapa li entsoe ka roll ebile li na le litšobotsi tse hlahelletseng tsa welding.Post-weld annealing ha e hlokehe.Li boetse li na le boima bo babatsehang, esita le ho fihlela mocheso oa cryogenic.Kereiti ea 321 ha e benche hantle, ka hona ha e khothalletsoe bakeng sa lits'ebetso tsa mokhabiso.
Grade 304L e fumaneha habonolo ka mefuta e mengata ea lihlahisoa, 'me ka kakaretso e sebelisoa ho khetha 321 haeba tlhokahalo e le feela bakeng sa ho hanyetsa ho bola ha intergranular ka mor'a ho cheselletsa.Leha ho le joalo, 304L e na le matla a tlase a chesang ho feta 321, kahoo ha se khetho e ntle ka ho fetisisa haeba tlhokahalo e le ho hanyetsa tikoloho ea ts'ebetso ho feta 500 ° C.
Thepa ea Bohlokoa
Mehaho ena e hlalositsoe bakeng sa lihlahisoa tse pota-potiloeng (plate, sheet, le coil) ho ASTM A240/A240M.Lintho tse ts'oanang empa eseng hakaalo li hlalositsoe bakeng sa lihlahisoa tse ling tse kang pipe le bar ho ea ka litlhaloso tsa tsona.
Sebopeho
Mekhahlelo e tloaelehileng ea lishiti tsa tšepe tsa sehlopha sa 321 li fanoe tafoleng ea 1.
Lethathamo la 1.Mefuta ea libopeho tsa tšepe e sa hloekang ea grade 321
| Kereiti | C | Mn | Si | P | S | Cr | Mo | Ni | N | Tse ding | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 321 | min. max | - 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 | - | 9.0 12.0 | 0.10 | Ti=5(C+N) 0.70 |
| 321H | min. max | 0.04 0.10 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 | - | 9.0 12.0 | - | Ti=4(C+N) 0.70 |
| 347 | min. max | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 | - | 9.0 13.0 | - | Nb=10(C+N) 1.0 |
Thepa ea Mechini
Mehaho e tloaelehileng ea mochini bakeng sa lishiti tsa tšepe tsa grade 321 li fanoe tafoleng ea 2.
Lethathamo la 2.Mechini ea thepa ea tšepe e sa hloekang ea 321-grade
| Kereiti | Tensile Strength (MPa) min | Matla a Kotulo 0.2% Bopaki (MPa) min | Elongation (% in 50 mm) min | Ho thatafala | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321 | 515 | 205 | 40 | 95 | 217 |
| 321H | 515 | 205 | 40 | 95 | 217 |
| 347 | 515 | 205 | 40 | 92 | 201 |
Lintho Tsa 'Mele
Mehaho e tloaelehileng ea lishiti tse se nang tšepe tsa sehlopha sa 321 li fanoe tafoleng ea 3.
Lethathamo la 3.Thepa ea 'mele ea tšepe e sa hloekang ea sehlopha sa 321 maemong a annealed
| Kereiti | Boima ba 'mele (kg/m3) | Elastic Modulus (GPA) | Kakaretso ea Coefficient ea Katoloso ea Thermal (μm/m/°C) | Thermal Conductivity (W/mK) | Mocheso o khethehileng 0-100 °C (J/kg.K) | Ho hanyetsa Motlakase (nΩ.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-100 °C | 0-315 °C | 0-538 °C | ka mocheso oa 100 ° C | ka mocheso oa 500 ° C | |||||
| 321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
Kereiti Specification Papiso
Papiso e hakanyetsoang ea lishiti tse 321 tsa tšepe li fanoe tafoleng ea 4.
Lethathamo la 4.Litlhaloso tsa sehlopha sa tšepe e sa hloekang ea grade 321
| Kereiti | Nomoro ea UNS | Old British | Euronorm | Seswedishe SS | JIS ea Japane | ||
|---|---|---|---|---|---|---|---|
| BS | En | No | Lebitso | ||||
| 321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
| 321H | S32109 | 321S51 | - | 1.4878 | X10CrNiTi18-10 | - | SUS 321H |
| 347 | S34700 | 347S31 | 58G | 1.4550 | X6CrNiNb18-10 | 2338 | SUS 347 |
Nako ea poso: Jun-06-2023