Melemo Of Cold Thehile Welded Structural
Litšepe tse batang tse entsoeng ka serame li hlahisoa ka ho koba le ho etsa lipampiri tsa tšepe kapa li-coil ka mocheso oa kamore ntle le ho sebelisa mocheso. Mokhoa ona o hlahisa thepa e matla, e tšoarellang ho feta tšepe e entsoeng ka mocheso o chesang. Tšepe ena e entsoeng ka serame e fana ka melemo e 'maloa ea bohlokoa ha e kopantsoe hammoho ho etsa likarolo tsa sebopeho.
Standard | Kereiti ea tšepe | Sebopeho sa lik'hemik'hale | Thepa ea tensile | Teko ea Charpy Impact le Teko ea ho theola boima ba 'mele | ||||||||||||||
C | Si | Mn | P | S | V | Nb | Ti | CEV4) (%) | Rt0.5 Mpa Ho hlahisa matla | Rm Mpa Tensile Matla | Rt0.5/ Rm | (L0=5.65 √ S0 )Elongation A% | ||||||
max | max | max | max | max | max | max | max | Tse ding | max | min | max | min | max | max | min | |||
L245MB | 0.22 | 0.45 | 1.2 | 0.025 | 0.15 | 0.05 | 0.05 | 0.04 | 1) | 0.4 | 245 | 450 | 415 | 760 | 0.93 | 22 | Teko ea phello ea Charpy: Matla a ho monya matla a 'mele oa liphaephe le seam ea weld e tla lekoa joalo ka ha ho hlokahala maemong a mantlha. Bakeng sa lintlha, sheba maemo a mantlha. Teko ea ho theola boima ba 'mele: Sebaka sa boikhethelo sa ho kuta | |
GB/T9711-2011 (PSL2) | L290MB | 0.22 | 0.45 | 1.3 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | 1) | 0.4 | 290 | 495 | 415 | 21 | |||
L320MB | 0.22 | 0.45 | 1.3 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | 1) | 0.41 | 320 | 500 | 430 | 21 | ||||
L360MB | 0.22 | 0.45 | 1.4 | 0.025 | 0.015 | 1) | 0.41 | 360 | 530 | 460 | 20 | |||||||
L390MB | 0.22 | 0.45 | 1.4 | 0.025 | 0.15 | 1) | 0.41 | 390 | 545 | 490 | 20 | |||||||
L415MB | 0.12 | 0.45 | 1.6 | 0.025 | 0.015 | 1)2)3 | 0.42 | 415 | 565 | 520 | 18 | |||||||
L450MB | 0.12 | 0.45 | 1.6 | 0.025 | 0.015 | 1)2)3 | 0.43 | 450 | 600 | 535 | 18 | |||||||
L485MB | 0.12 | 0.45 | 1.7 | 0.025 | 0.015 | 1)2)3 | 0.43 | 485 | 635 | 570 | 18 | |||||||
L555MB | 0.12 | 0.45 | 1.85 | 0.025 | 0.015 | 1)2)3 | Puisano | 555 | 705 | 625 | 825 | 0.95 | 18 | |||||
Hlokomela: | ||||||||||||||||||
1)0.015 ≤ Altot < 0.060;N ≤ 0.012;AI—N ≥ 2—1;Cu ≤ 0.25;Ni ≤ 0.30;Cr ≤ 0.30;Mo ≤ 0.10; | ||||||||||||||||||
2)V+Nb+Ti ≤ 0.015% | ||||||||||||||||||
3) Bakeng sa limaraka tsohle tsa tšepe, Mo e ka ≤ 0.35%, tlas'a konteraka. | ||||||||||||||||||
Mong Cr+Mo+V Ke+Ni4)CEV=C+6 + 5 + 5 |
E 'ngoe ea melemo e ka sehloohong eahatsela bopehile ka sebopeho se cheselitsoeng tšepe ke karo-karolelano e phahameng ea matla-to-boima. Sena se bolela hore e fana ka matla a phahameng ha e ntse e batla e le bobebe, e etsa hore ho be bonolo ho sebetsana le ho tsamaisa nakong ea kaho. Ho feta moo, matla a phahameng a tšepe e entsoeng ka serame a thusa meralo e menyenyane le e sebetsang hantle ea meralo e eketsang sebaka le ho fokotsa tšebeliso ea thepa.
Molemo o mong oa bohlokoa oa tšepe ea tšepe e entsoeng ka mokhoa o batang ke ho lumellana le ho tsitsa ha eona. Mokhoa o batang oa ho theha o tiisa hore tšepe e boloka thepa e tsitsitseng ea mechine ho pholletsa le thepa, e leng se etsang hore ho be le ts'ebetso e sa lebelloang le e ka tšeptjoang. Ho tsitsana hona ho bohlokoa ho netefatsa bots'epehi ba sebopeho le polokeho ea kaho ea ho qetela.

Ntle le matla le ho tsitsa, tšepe e batang e entsoeng ka Welded Structural e fana ka ho nepahala le ho nepahala ho hoholo. Mokhoa o batang oa ho theha o lumella ho mamellana ka thata le ho bōptjoa ka mokhoa o nepahetseng, ho netefatsa hore likarolo tsa mohaho li lumellana ka mokhoa o tsitsitseng nakong ea kopano. Boemo bona ba ho nepahala bo bohlokoa bakeng sa ho fumana sehlahisoa se felileng sa boleng bo holimo, se khahlang ka pono.
Ntle le moo, tšepe e batang e entsoeng ka Welded Structural e sebetsa ka mefuta-futa 'me e ka etsoa ka mokhoa o ikhethileng ho fihlela litlhoko tse ikhethang tsa projeke. E ka bōptjoa habonolo 'me ea etsoa ka mefuta e sa tšoaneng ea li-contours le litlhophiso, e leng se lumellang hore ho thehoe meralo e rarahaneng ea meralo. Ts'ebetso ena e fapaneng e etsa hore e tšoanelehe bakeng sa mefuta e mengata ea likopo ho tloha mohahong oa bolulo ho ea mehahong ea indasteri.
Tšebeliso ea tšepe e batang ea Formed Welded Structural e boetse e kenya letsoho mekhoeng e tsitsitseng ea ho haha. Boemo ba eona bo bobebe bo fokotsa mojaro o akaretsang holim'a motheo le sebopeho sa ts'ehetso, se bakang ho boloka litšenyehelo le melemo ea tikoloho. Ho feta moo, ts'ebetso ea tšepe e sebelisoa hape e etsa hore e be khetho e ntle ea tikoloho bakeng sa merero ea kaho.
Ka kakaretso, tšepe e batang ea Formed Welded Structural steel e fana ka melemo e mengata e etsang hore e be khetho e ntle bakeng sa merero ea kaho. Karolelano ea eona e phahameng ea matla ho boima, ho tsitsisa, ho nepahala, ho feto-fetoha ha maemo le ho tšoarella ho etsa hore e be thepa ea bohlokoa bakeng sa ho theha mehaho e tšoarellang, e sebetsang hantle. Ha indasteri ea kaho e ntse e tsoela pele ho fetoha, tšepe e batang e Felletseng e Welded Structural e tla bapala karolo ea bohlokoa ho bopeng meaho le meralo ea motheo ea bokamoso.