BV E500 yog lub siab -lub zog marine steel phaj ntawv pov thawj los ntawm Bureau Veritas (BV). Qib "E" qhia tau hais tias nws raug kuaj ntawm -40 degree, kom ntseeg tau tias kev ua tau zoo hauv qhov chaw txias. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 500 MPa thiab tensile lub zog ntawm 610 txog 770 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 16%. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.20%, manganese Tsawg dua lossis sib npaug li 1.70%, thiab silicon Tsawg dua lossis sib npaug li 0.55%. Qib no feem ntau yog muab rau hauv quenched thiab tempered (QT) lossis thermomechanical controlled processed (TMCP) tej yam kev mob. Nws yog dav siv rau kev tsim vaj tse, decks, bulkheads, thiab offshore lug xav tau lub zog siab thiab zoo weldability.
BV E690 yog ib qho ultra- siab- lub zog marine steel kuj tau ntawv pov thawj los ntawm Bureau Veritas (BV) nrog rau kev cuam tshuam toughness kuaj ntawm -40℃. Lub "690" qhia txog qhov tsawg kawg nkaus tawm lub zog ntawm 690 MPa . Nws muaj lub zog tensile xws li 770 txog 940 MPa thiab elongation yam tsawg kawg nkaus ntawm 14%. Cov tshuaj muaj pes tsawg leeg yog nruj me ntsis tswj nrog carbon Tsawg dua los yog sib npaug rau 0.20%, manganese Tsawg dua los yog sib npaug rau 1.70%, thiab microalloying ntsiab. Qib no yuav tsum tau ua tiav qib siab thiab feem ntau yog muab rau hauv quenched thiab tempered (QT) lossis TMCP cov xwm txheej. Nws yog tsim los rau cov khoom siv uas xav tau tshaj plaws hauv kev tsim cov nkoj, cov chaw ua haujlwm sab nrauv, thiab cov khoom siv hauv hiav txwv uas xav tau lub zog siab tshaj plaws - rau qhov hnyav piv.
Ob leeg BV E500 thiab BV E690 yog BV- ntawv pov thawj siab - lub zog marine steels nrog zoo heev qis - kub toughness kuaj ntawm -40 degree, kom ntseeg tau tias kev ua tau zoo nyob rau hauv hnyav marine ib puag ncig . Lawv qhov sib txawv tseem ceeb nyob hauv qib siab: E500 muaj qhov tsawg kawg nkaus lub zog ntawm 500 MPa nrog lub zog tensile ntawm 610-770 MPa, haum rau kev siab dav - lub zog hull kev tsim kho thiab cov qauv sab nrauv , thaum E690 muab qhov muaj zog ntau dua qhov tsawg kawg nkaus lub zog ntawm kaum 6709 MPa 690 MPa, tsim los rau kev siv zog ntxiv rau hauv cov khoom tseem ceeb ntawm cov kabmob. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.20% thiab manganese Tsawg dua lossis sib npaug li 1.70%, thiab yuav tsum tau ua tiav qib siab xws li QT lossis TMCP kom ua tiav lawv cov khoom siv kho tshuab thaum tuav cov khoom zoo rau kev pabcuam marine.
Tshuaj muaj pes tsawg leeg
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BV E500 ntxiv Cov Tshuaj Muaj Zog Muaj Zog Muaj Zog Tempering thiab Quenching |
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|
Qib |
Cov ntsiab lus Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al (min) |
N |
|
|
BV E500 |
0.20 |
0.55 |
1.70 |
0.030 |
0.030 |
0.015 |
0.020 |
|
BV E690 ntxiv Cov Tshuaj Muaj Zog Muaj Zog Muaj Zog Tempering thiab Quenching |
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|
Qib |
Cov ntsiab lus Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al (min) |
N |
|
|
BV E690 |
0.20 |
0.55 |
1.70 |
0.030 |
0.030 |
0.015 |
0.020 |
Mechanical Property
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BV E500 ntxiv Cov khoom muaj zog siab hauv Tempering thiab quenching |
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|
Qib |
Mechanical Property |
Charpy V Impact Test |
||||
|
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
|
|
BV E500 |
Min Mpa |
Mpa |
Tsawg% |
-40 |
J |
J |
|
500 |
610-770 |
16% |
33 |
50 |
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|
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev |
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|
BV E690 ntxiv Cov khoom muaj zog siab hauv Tempering thiab quenching |
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|
Qib |
Mechanical Property |
Charpy V Impact Test |
||||
|
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
|
|
BV E690 |
Min Mpa |
Mpa |
Tsawg% |
-40 |
J |
J |
|
690 |
770-940 |
14% |
46 |
69 |
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|
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev |
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