Liphaephe tsa Sebopeho sa Karolo e Sekoti Bakeng sa Mehala ea Khase ea Tlhaho e Ka tlas'a Lefatše
Spiral submered arcphalasli sebelisoa haholo kahong ea mehala ea khase ea tlhaho e ka tlas'a lefatše ka lebaka la ts'ebetso ea tsona e ikhethang ea tlhahiso.Liphaephe li etsoa ka ho etsa likhoele tsa tšepe e kolobisitsoeng ka ho chesa hore li be sebopeho se bilikang ebe li li tjheseletsa ka mokhoa oa ho tjheseletsa ka tlas'a metsi.Sena se hlahisa liphaephe tsa arc tse nang le matla a phahameng a Spiral tse nang le botenya bo ts'oanang le ho nepahala ha maemo, ho li etsa tse loketseng ho tsamaisa khase ea tlhaho e ka tlas'a lefatše.
Lethathamo la 2 Thepa e ka Sehloohong ea 'Mele le ea Lik'hemik'hale ea Liphaephe tsa Tšepe (GB/T3091-2008, GB/T9711-2011 le API Spec 5L) | ||||||||||||||
Standard | Kereiti ea tšepe | Likarolo tsa Lik'hemik'hale (%) | Thepa ea Tensile | Teko ea Tšusumetso ea Charpy(V notch) | ||||||||||
c | Mn | p | s | Si | Tse ding | Yield Strength (Mpa) | Tensile Strength (Mpa) | (L0=5.65 √ S0 )Metsotso e Lebelo la ho Otlolla (%) | ||||||
max | max | max | max | max | min | max | min | max | D ≤ 168.33mm | D ~ 168.3 limilimithara | ||||
GB/T3091 -2008 | Q215A | ≤ 0.15 | 0.25 < 1.20 | 0.045 | 0.050 | 0.35 | Ho eketsa Nb\V\Ti ho latela GB/T1591-94 | 215 |
| 335 |
| 15 | > 31 |
|
Q215B | ≤ 0.15 | 0.25-0,55 | 0.045 | 0.045 | 0.035 | 215 | 335 | 15 | > 31 | |||||
Q235A | ≤ 0.22 | 0.30 < 0.65 | 0.045 | 0.050 | 0.035 | 235 | 375 | 15 | >26 | |||||
Q235B | ≤ 0.20 | 0.30 ≤ 1.80 | 0.045 | 0.045 | 0.035 | 235 | 375 | 15 | >26 | |||||
Q295A | 0.16 | 0.80-1,50 | 0.045 | 0.045 | 0.55 | 295 | 390 | 13 | >23 | |||||
Q295B | 0.16 | 0.80-1,50 | 0.045 | 0.040 | 0.55 | 295 | 390 | 13 | >23 | |||||
Q345A | 0.20 | 1.00-1.60 | 0.045 | 0.045 | 0.55 | 345 | 510 | 13 | >21 | |||||
Q345B | 0.20 | 1.00-1.60 | 0.045 | 0.040 | 0.55 | 345 | 510 | 13 | >21 | |||||
GB/T9711-2011 (PSL1) | L175 | 0.21 | 0.60 | 0.030 | 0.030 |
| Ka boikhethelo ho kenyelletsa e 'ngoe ea likarolo tsa Nb\V\Ti kapa motsoako ofe kapa ofe oa tsona | 175 |
| 310 |
| 27 | E 'ngoe kapa tse peli tsa toughness index of impact energy le sebaka sa ho kuta li ka khethoa.Bakeng sa L555, bona maemo. | |
L210 | 0.22 | 0.90 | 0.030 | 0.030 | 210 | 335 | 25 | |||||||
L245 | 0.26 | 1.20 | 0.030 | 0.030 | 245 | 415 | 21 | |||||||
L290 | 0.26 | 1.30 | 0.030 | 0.030 | 290 | 415 | 21 | |||||||
L320 | 0.26 | 1.40 | 0.030 | 0.030 | 320 | 435 | 20 | |||||||
L360 | 0.26 | 1.40 | 0.030 | 0.030 | 360 | 460 | 19 | |||||||
L390 | 0.26 | 1.40 | 0.030 | 0.030 | 390 | 390 | 18 | |||||||
L415 | 0.26 | 1.40 | 0.030 | 0.030 | 415 | 520 | 17 | |||||||
L450 | 0.26 | 1.45 | 0.030 | 0.030 | 450 | 535 | 17 | |||||||
L485 | 0.26 | 1.65 | 0.030 | 0.030 | 485 | 570 | 16 | |||||||
API 5L (PSL 1) | A25 | 0.21 | 0.60 | 0.030 | 0.030 |
| Bakeng sa tšepe ea sehlopha sa B,Nb+V ≤ 0.03%; bakeng sa tšepe ≥ sehlopha sa B, ka boikhethelo ho eketsa Nb kapa V kapa motsoako oa bona, le Nb+V+Ti ≤ 0.15% | 172 |
| 310 |
| (L0=50.8mm) e tla baloa ho latela foromo e latelang:e=1944·A0 .2/U0 .0 A: Sebaka sa sampole ho mm2 U: Matla a fokolang a boletsoeng ho Mpa | Ha ho letho kapa leha e le efe kapa bobeli ba matla a tšusumetso le sebaka sa ho kuta e hlokahalang e le mokhoa oa ho thatafala. | |
A | 0.22 | 0.90 | 0.030 | 0.030 |
| 207 | 331 | |||||||
B | 0.26 | 1.20 | 0.030 | 0.030 |
| 241 | 414 | |||||||
X42 | 0.26 | 1.30 | 0.030 | 0.030 |
| 290 | 414 | |||||||
X46 | 0.26 | 1.40 | 0.030 | 0.030 |
| 317 | 434 | |||||||
X52 | 0.26 | 1.40 | 0.030 | 0.030 |
| 359 | 455 | |||||||
X56 | 0.26 | 1.40 | 0.030 | 0.030 |
| 386 | 490 | |||||||
X60 | 0.26 | 1.40 | 0.030 | 0.030 |
| 414 | 517 | |||||||
X65 | 0.26 | 1.45 | 0.030 | 0.030 |
| 448 | 531 | |||||||
X70 | 0.26 | 1.65 | 0.030 | 0.030 |
| 483 | 565 |
E 'ngoe ea melemo ea mantlha ea liphaephe tsa sebopeho sa karolo e se nang letho ke ho hanyetsa ha tsona ho hoholo ha kutu.Ha li patoa ka tlas'a lefatše, liphaephe tsa khase ea tlhaho li pepesehela mongobo, lik'hemik'hale tsa mobu le lintho tse ling tse senyang.Lipeipi tsa "spiral submerged arc" li etselitsoe ka ho khetheha ho mamella maemo ana a thata a ka tlas'a lefatše, ho netefatsa bophelo bo bolelele le ho tšepahala ha lipeipi tsa khase ea tlhaho.
Ntle le ho hanyetsa kutu,liphaephe tsa sebopeho sa karolo e sekotifana ka matla a phahameng le botsitso, ho etsa hore li tšoanelehe bakeng sa ho kenngoa ka tlas'a lefatše.Moetso oa spiral oa liphaephe tsena o fana ka bokhoni bo babatsehang ba ho jara moroalo, o li lumella ho mamella boima ba mobu le matla a mang a ka ntle ntle le ho senya botšepehi ba tsona ba sebopeho.Sena se bohlokoa ka ho khetheha libakeng tse nang le phephetso ea jeoloji, moo liphaephe li tlamehang ho khona ho mamella ho sisinyeha ha mobu le ho rala.
Ho feta moo, liphaephe tsa sebopeho sa karolo e sekoti li tsebahala ka ho feto-fetoha ha tsona le ho baballa litšenyehelo.Li tla ka boholo bo fapaneng le botenya 'me li ka etsoa ka mokhoa o ikhethileng ho fihlela litlhoko tse khethehileng tsa merero ea lipeipi tsa khase ea tlhaho tse ka tlas'a lefatše.Sena se fokotsa tlhokahalo ea lisebelisoa tse eketsehileng le welding, e leng se etsang hore ho be le ho kenngoa ka potlako le litšenyehelo tse fokolang ka kakaretso.Boemo bo bobebe ba liphaephe tsena le bona bo etsa hore lipalangoang le ho li tšoara ka katleho, e leng se tlatsetsang ho babaleng litšenyehelo.
Ha ho tluoa tabeng ea polokeho le katleho eamehala ea khase ea tlhaho e ka tlas'a lefatše, khetho ea thepa ke ea bohlokoa.Liphaephe tsa sebopeho sa karolo e sekoti, haholo-holo liphaephe tsa spiral tse ka tlas'a metsi, li kopanya matla, ho tšoarella, ho hanyetsa kutu le ho sebetsa hantle ha litšenyehelo, ho li etsa tse loketseng phetiso ea khase ea tlhaho e ka tlas'a lefatše.Ka ho tsetela liphaepheng tsa boleng bo phahameng tse etselitsoeng ka ho khetheha bakeng sa lisebelisoa tsa ka tlas'a lefatše, lik'hamphani tsa khase li ka netefatsa ho tšepahala le ho phela nako e telele ha lisebelisoa tsa bona tsa motheo ha li ntse li fokotsa litšenyehelo tsa tlhokomelo le tokiso ka nako e telele.
Ka bokhuts'oane, liphaephe tsa meralo e se nang letho li bapala karolo ea bohlokoa kahong ea likhoele tsa khase ea tlhaho tse ka tlas'a lefatše.Ho hanyetsa ho hoholo ha eona ho phahameng, matla a phahameng le ho boloka litšenyehelo ho etsa hore e be khetho ea pele bakeng sa merero ea lipalangoang tsa khase ea tlhaho.Ka ho khetha lisebelisoa tse nepahetseng bakeng sa lits'ebeletso tsa ka tlas'a lefatše, lik'hamphani tsa khase ea tlhaho li ka boloka polokeho le ts'epahalo ea lisebelisoa tsa bona tsa motheo, qetellong li thusa ho fana ka khase ea tlhaho ka katleho ho bareki.