DNV E690 thiab E400 yog siab -lub zog shipbuilding/offshore steel daim hlau ntawv pov thawj los ntawm DNV (Det Norske Veritas), nrog rau tus naj npawb qhia tawm yam tsawg kawg nkaus lub zog (690 MPa rau E690, ~ 400 MPa rau E400), siv rau qhov tseem ceeb marine qauv, tshwj tsis yog lub zog tawm ntawm ntug dej hiav txwv, cov khoom siv thiab cov khoom siv. toughness, thiab weldability, feem ntau xa nyob rau hauv quenched & tempered (QT) los yog TMCP tej yam kev mob rau superior kev kawm. E690 yog ib qho ntxiv - qib siab zog, thaum E400 poob rau hauv qib siab - lub zog, ob qho tib si muaj cov tshuaj tswj tau thiab cov khoom siv kho tshuab nruj rau cov dej hiav txwv hnyav.
Tshuaj muaj pes tsawg leeg
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DNV E420 ntxiv muaj zog Chemical Composition |
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Qib |
Cov ntsiab lus Max (%) |
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C |
Si |
Mn |
P |
S |
Al |
N |
|
|
DNV E420 |
0.20 |
0.10-0.55 |
1.7 |
0.030 |
0.030 |
0.015-0.08 |
0.020 |
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Nb |
V |
Ti |
Cu |
B |
Ni |
Mo |
|
|
0.02-0.05 |
0.04-0.10 |
0.02 |
|
0.005 |
|
|
|
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DNV E690 ntxiv muaj zog Chemical Composition |
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|
Qib |
Cov ntsiab lus Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al |
N |
|
|
DNV E690 |
0.20 |
0.10-0.55 |
1.7 |
0.030 |
0.030 |
0.015-0.08 |
0.020 |
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Nb |
V |
Ti |
Cu |
B |
Ni |
Mo |
|
|
0.02-0.05 |
0.04-0.10 |
0.02 |
|
0.005 |
|
|
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Mechanical Property
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DNV E420 ntxiv cov khoom muaj zog dav dav |
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Qib |
|
Mechanical Property |
Charpy V Impact Test |
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Thickness |
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
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DNV E420 |
mm |
Min Mpa |
Mpa |
Tsawg% |
-40 |
J |
J |
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t Tsawg dua lossis sib npaug li 50 |
420 |
530-680 |
18% |
28 |
42 |
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50＜t Tsawg dua lossis sib npaug rau 70 |
420 |
530-680 |
18% |
28 |
42 |
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70＜t Tsawg dua lossis sib npaug rau 150 |
420 |
530-680 |
18% |
28 |
42 |
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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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DNV E690 ntxiv cov khoom muaj zog dav dav |
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|
Qib |
|
Mechanical Property |
Charpy V Impact Test |
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|
Thickness |
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
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|
DNV E690 |
mm |
Min Mpa |
Mpa |
Tsawg% |
-40 |
J |
J |
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t Tsawg dua lossis sib npaug li 50 |
690 |
770-940 |
14% |
46 |
69 |
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50＜t Tsawg dua lossis sib npaug rau 70 |
690 |
770-940 |
14% |
46 |
69 |
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70＜t Tsawg dua lossis sib npaug rau 150 |
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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DNV E690 Hlau Phaj
Lub zog: Yam tsawg kawg nkaus lub zog ntawm 690 MPa, ib qho ntxiv - qib siab zog.
Daim ntawv thov: Hull kev tsim kho, offshore platforms, qhov tseem ceeb ntawm cov qauv xav tau kev thauj khoom hnyav.
Khoom siv: siab tensile zog, zoo heev toughness, thiab ductility, feem ntau martensitic.
Kev xa khoom: Feem ntau muab rau hauv Normalized, TMCP (Thermo-Mechanical Controlled Processing), lossis Quenched & Tempered (QT) cov xwm txheej.
DNV E400 Steel Phaj (los yog cov qib zoo sib xws xws li E420 / F420)
Lub zog: Nyob ib ncig ntawm 400 MPa yam tsawg kawg nkaus lub zog, categorized li siab -lub zog steel.
Daim Ntawv Thov: Kev tsim cov nkoj dav dav, kho nkoj, cov qauv sab nrauv uas xav tau lub zog siab tab sis tsis yog qib siab ntawm E690.
Properties: Kev sib xyaw ua ke zoo ntawm lub zog thiab tawv, haum rau thaj chaw marine.
Kev xa tawm: Kev kho cua sov zoo ib yam li E690 (Normalized, QT, TMCP) kom ua tiav cov khoom xav tau.
Qhov tseem ceeb sib txawv & Zoo sib xws
Lub zog: E690 yog qhov muaj zog dua (690 MPa vs. ~ 400 MPa).
Daim ntawv thov: Ob qho tib si rau marine, tab sis E690 rau kev xav tau ntau dua, siab dua - qhov kev ntxhov siab.
Kev faib tawm: Ob leeg yog DNV- ntawv pov thawj qib steel rau marine / offshore siv.
Kev Ua Haujlwm: Ob qho tib si tau txais txiaj ntsig los ntawm kev tswj cov tshuaj thiab cov kev kho cua sov tshwj xeeb (xws li QT / TMCP) rau kev ua haujlwm zoo thiab ua haujlwm vuam.
