L485 lipeipi tsa tšepe bakeng sa indasteri ea peterole
L485 Pipeline Steel, E bolela mofuta oa tšepe o nang le litlhoko tse khethehileng tse sebelisetsoang ho tsamaisa oli, khase ea tlhaho le liphaephe tse ling.Ho ea ka botenya le sebopeho se latelang le likarolo tse ling, e ka hlahisoa ka leloala le chesang le chesang, leloala la steckel kapa leloala la poleiti, 'me le entsoe ka tjheseletsa ea spiral kapa UOE seam seam welding ea phala e kholo ea tšepe ea bophara.
L485 Pipeline Steel, Selelekela sa The
Lipalangoang tsa lipeipi le lipalangoang tsa literene, lipalangoang tsa litsela tse kholo, lipalangoang tsa metsing le lipalangoang tsa sefofane li thathamisitsoe e le mekhoa e mehlano ea sejoale-joale ea lipalangoang.Ho tloha qalong ea lipeipi tsa indasteri ho tla fihlela joale, kaho ea lipeipi tsa oli le khase e bile le nts'etsopele ea lilemo tse ka bang makholo a mabeli.Ho hlahisoa le ho sebelisoa ha tšepe ea liphaephe ho qalile morao Chaena, 'me ho ne ho se na tlhahiso ea tšepe ea liphaephe ea sebele pele ho 1985. Leha ho le joalo, lilemong tsa morao tjena, nts'etsopele, nts'etsopele le ts'ebeliso ea tšepe ea liphaephe Chaena li tsoetse pele ka potlako.Ka khothaletso ea merero e meholo ea lipeipi tse kang lipeipi tsa bophirima, phaephe ea phetiso ea khase ea Bophirima-bochabela le phaephe ea mothating oa bobeli oa phetiso ea khase ea bophirima-bochabela, tlhahiso le tšebeliso ea tšepe ea liphaephe tsa X60, X70 le X80 li phethetsoe ka tatelano, 'me liphetho tsa lipatlisiso. ea X100 le X120 e fumanoe.
L485 Pipeline Steel, Mefuta ea Lithane
L485 Pipeline Steel, Sebopeho sa mokhatlo ke motheo oa ho khetholla ts'ebetso ea eona le ts'ebeletso e sireletsehileng.Hajoale, litšepe tsa liphaephe li ka aroloa ka mekhahlelo e mene e latelang ho latela microstructure ea tsona:
1. Ferritic pearlite pipeline tšepe
Ferritic pearlite pipeline steel ke sebopeho sa mantlha sa tšepe ea lipeipi e ntlafalitsoeng pele ho lilemo tsa bo-1960.X52 le tšepe ea pipeline e nang le matla a tlase kaofela ke pearlite ea ferritic.Likarolo tsa eona tsa mantlha ke k'habone le manganese, 'me litaba tsa khabone (karolo ea boima, e tšoanang ka tlase) ke 0.10% ho isa ho 0.20%,' me litaba tsa manganese ke 1.30% ho isa ho 1.70%.Ka kakaretso sebelisa hot rolling kapa ho chesa tlhahiso ea ts'ebetso ea kalafo.Ha matla a phahameng a hlokahala, moeli o ka holimo oa carbon content oa lakatseha, kapa trace niobium le vanadium li kenngoa tsamaisong ea manganese.Litšepe tsa lipeipi tsa ferritic pearlite hangata li nkuoa li na le polygonal ferrite ka boholo ba lijo-thollo tse ka bang 7μm le perela e nang le karoloana e ka bang 30%.Litšepe tse tloaelehileng tsa perritic pearlite ke 5LB, X42, X52, X60, X60 le X70.
2. Acicular ferrite pipeline tšepe
Patlisiso ea tšepe ea lipeipi tsa acicular ferritic e qalile ho elella bofelong ba lilemo tsa bo-1960 mme e kentsoe tlhahiso ea indasteri mathoasong a bo-1970.Ka nako eo, tsamaiso ea manganese - niobium e thehiloeng ho E e ile ea hlahisa carbon e tlaase.Ka tšepe ea liphaephe tsa microalloy ea mn-Mo-Nb, ho eketsoa ha molybdenum ho ka fokotsa mocheso oa phetoho ho thibela sebopeho sa ferrite ea polygonal, ho khothaletsa phetoho ea acicular ferrite, le ho ntlafatsa phello e matlafatsang ea carbon le niobium nitride, e le ho eketsa matla a tšepe. le ho fokotsa ho thatafala le mocheso oa phetoho ea brittle.Theknoloji ena ea ho kopanya molybdenum e 'nile ea etsoa ka lilemo tse ka bang 40.Lilemong tsa morao tjena, theknoloji e 'ngoe ea mocheso o phahameng oa ho fumana ferrite ea acicular e ntse e hlaha.E ka fumana ferrite ea acicular ka mocheso o phahameng oa mocheso ka ho sebelisa theknoloji e phahameng ea niobium alloying.Litšepe tse tloaelehileng tsa acicular ferrite pipeline ke X70 le X80.
3. Bainite - martensite pipeline tšepe
Ka nts'etsopele ea khatello e phahameng le phallo e kholo ea lipeipi tsa khase ea tlhaho ea tšepe le ho phehella ho fokotsa litšenyehelo tsa kaho ea liphaephe, sebopeho sa ferrite sa acicular se ke ke sa fihlela litlhoko.Qetellong ea lekholo la bo20 la lilemo, ho ile ha hlaha mofuta oa tšepe ea lipeipi tse matla haholo.Limaraka tse tloaelehileng tsa tšepe ke X100 le X120.X100 e ile ea tlalehoa ka lekhetlo la pele ke SMI Japane ka 1988. Ka mor'a lilemo tsa lipatlisiso le nts'etsopele, phala ea X100 e ile ea behoa ka lekhetlo la pele karolong ea teko ea boenjiniere ka 2002. ExxonMobil ea United States e qalile lipatlisiso ka tšepe ea liphaephe tsa X120 ka 1993, 'me ka 1996, e ile ea sebelisana le SMI le NSC ea Japane ho khothaletsa ka kopanelo ts'ebetso ea lipatlisiso ea X120.Ka 2004, tšepe ea X120 e ile ea behoa ka lekhetlo la pele karolong ea teko ea lipeipi.
Moralong oa sebopeho sa tšepe ea liphaephe tsa bainite-martensitic, ho khethiloe motsoako o nepahetseng oa khabone - manganese - koporo - nickel - molybdenum - niobium - vanadium - titanium - boron.Moqapi oa motsoako ona o sebelisa ka botlalo litšobotsi tsa bohlokoa tsa boron ho matla a phetoho ea mohato.Ho eketsoa ha trace boron (ωB = 0.0005% ~ 0.003%) ka ho hlakileng ho ka thibela nucleation ea ferrite moeling oa lijo-thollo tsa austenite 'me ea etsa hore lekhalo la ferrite le fetohe ka ho le letona ho hlakile. Phetoho ea phetoho ea bainite e batalatsoa ka ho theola mocheso oa ho qetela oa ho pholisa (& LT; 300 ℃) le sekhahla se ntlafalitsoeng sa ho pholisa (> 20 ℃/s), sebopeho se tlase sa bainite le lath martensite le sona se ka fumanoa.Litšepe tse tloaelehileng tsa bainite-martensite (B -- M) ke X100 le X120.
4. Tšepe ea pipeline ea sophorite e halefileng
Ka tsoelo-pele ea sechaba, tšepe ea liphaephe e hlokahalang ho ba le matla a phahameng le ho tiea.Haeba thekenoloji e laoloang ea ho roala le ho pholisa e sa khone ho finyella litlhoko tse joalo, mokhoa oa phekolo ea mocheso oa ho tima le ho futhumatsa o thata o ka amoheloa ho finyella litlhoko tse feletseng tsa lerako le teteaneng, matla a phahameng le boima bo lekaneng ka ho etsa sorbitite e bohale.Ka tšepe ea lipeipi, mofuta ona oa homogenous sortensite, o tsejoang hape e le homogenous martensite, ke mofuta oa mokhatlo oa tšepe ea tšepe ea X120 e matla haholo.
Sebopeho sa Lik'hemik'hale
L245 Pipeline Steel, Foromo ea ho bala boima ba 'mele :[(bophara ba ka ntle - botenya ba lebota)* botenya ba lebota]*0.02466=kg/ m (boima ka mithara)
| Sebopeho sa lik'hemik'hale (karolo ea bongata)…/% | khabone e lekanang(CEV) | |||||||||||||||||
| C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | N | Mo | B | Als | ||||
| ka tlase ho kapa ho lekana |
| ka tlase ho kapa ho lekana | ||||||||||||||||
| Q345 | A | 0.2 | 0.5 | 1.7 | 0.035 | 0.035 |
|
|
| 0.3 | 0.5 | 0.2 | 0.012 | 0.1 |
|
| 0.45 | |
| B | 0.035 | 0.035 |
|
|
|
|
| |||||||||||
| C | 0.03 | 0.03 | 0.07 | 0.15 | 0.2 |
| 0.015 | |||||||||||
| D | 0.18 | 0.03 | 0.025 |
| ||||||||||||||
| E | 0.025 | 0.02 |
| |||||||||||||||
| Q390 | A | 0.2 | 0.5 | 1.7 | 0.035 | 0.035 | 0.07 | 0.2 | 0.2 | 0.3 | 0.5 | 0.2 | 0.015 | 0.1 |
|
| 0.46 | |
| B | 0.035 | 0.035 |
|
| ||||||||||||||
| C | 0.03 | 0.03 |
| 0.015 | ||||||||||||||
| D | 0.03 | 0.025 |
| |||||||||||||||
| E | 0.025 | 0.02 |
| |||||||||||||||
| Q420 | A | 0.2 | 0.5 | 1.7 | 0.035 | 0.035 | 0.07 | 0.2 | 0.2 | 0.3 | 0.8 | 0.2 | 0.015 | 0.2 |
|
| 0.48 | |
| B | 0.035 | 0.035 |
| 0.015 | ||||||||||||||
| C | 0.03 | 0.03 |
| |||||||||||||||
| D | 0.03 | 0.025 |
| |||||||||||||||
| E | 25 | 0.02 |
| |||||||||||||||
| Q450 | C | 0.2 | 0.6 | 1.8 | 0.03 | 0.03 | 0.11 | 0.2 | 0.2 | 0.3 | 0.8 | 0.2 | 0.015 | 0.2 | 0.005 | 0.015 | 0.53 | |
| D | 0.03 | 0.025 | ||||||||||||||||
| E | 0.025 | 0.02 | ||||||||||||||||
Pontšo ea Sehlahisoa
