BV AH32 thiab BV DH32 yog siab- lub zog hull cov qauv hlau daim hlau uas tau lees paub los ntawm Bureau Veritas (BV), tsim los rau kev tsim khoom nkoj thiab kev siv dej hiav txwv. Ob qib sib faib qhov tsawg kawg nkaus lub zog ntawm 315 MPa (raws li qhia los ntawm "32", uas sib raug rau 32 ksi yield zog). Lawv yog siv nyob rau hauv cov txheej txheem tseem ceeb ntawm cov hlab ntsha uas muaj zog ntxiv tso cai rau kev txo qhov hnyav. Qhov sib txawv tseem ceeb ntawm lawv yog nyob rau hauv lawv qhov kev pab cuam qhov kub thiab txias, qhia los ntawm lub npe "A" lossis "D".
Qhov txawv tseem ceeb
Qhov sib txawv tseem ceeb yog lawv qhov cuam tshuam toughness ntawm qhov kub thiab txias. Tus "A" hauv AH32 tau xaiv tias cov khoom siv qhov cuam tshuam rau qhov toughness yog kuaj ntawm 0℃(32℃F), ua rau nws tsim nyog rau cov nkoj dav dav hauv dej hiav txwv ua haujlwm hauv huab cua nruab nrab. Hauv qhov sib piv, "D" hauv DH32 qhia txog qhov ntsuas kub ntawm qhov kev pabcuam qis dua, yuav tsum tau kuaj xyuas qhov cuam tshuam ntawm -20℃(-4℃F). Qhov no ua rau BV DH32 steel haum rau cov nkoj ua haujlwm hauv cov dej txias dua, xws li North Atlantic, qhov yuav tsum tau ua kom muaj zog tiv thaiv kom tawg tawg. Txhawm rau kom ua tiav qhov kev txhim kho qis qis -kub toughness, DH32 feem ntau cuam tshuam nrog kev tswj hwm cov tshuaj muaj pes tsawg leeg thiab kev xyaum ua steel (xws li kev kho cov nplej zoo). Yog li, qhov kev xaiv xaiv yog qhov chaw ua haujlwm: BV AH32 yog rau cov ntawv thov muaj zog dav dav, thaum BV DH32 tau teev tseg rau cov ntawv thov muaj zog hauv kev pabcuam huab cua txias.
Tshuaj muaj pes tsawg leeg
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BV AH32 siab zog tshuaj muaj pes tsawg leeg nyob rau hauv tempering thiab quenching |
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Qib |
Cov ntsiab lus Max (%) |
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C |
Si |
Mn |
P |
S |
Al |
N |
|
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BV AW 32 |
0.18 |
0.1-0.50 |
0.90-1.6 |
0.035 |
0.035 |
0.015 |
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Nb |
V |
Ti |
Cu |
Cr |
Ni |
Mo |
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|
0.02-0.05 |
0.05-0.10 |
0.02 |
0.35 |
0.2 |
0.4 |
0.08 |
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BV DH32 high Strength Chemical Composition nyob rau hauv Tempering thiab quenching |
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Qib |
Cov ntsiab lus Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al |
N |
|
|
BV DH 32 |
0.18 |
0.1-0.50 |
0.90-1.6 |
0.035 |
0.035 |
0.015 |
|
|
Nb |
V |
Ti |
Cu |
Cr |
Ni |
Mo |
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0.02-0.05 |
0.05-0.10 |
0.02 |
0.35 |
0.2 |
0.4 |
0.08 |
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Mechanical Property
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BV AH32 siab zog khoom nyob rau hauv tempering thiab quenching |
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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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BV AW 32 |
mm |
Min Mpa |
Mpa |
Tsawg% |
0 |
J |
J |
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t Tsawg dua lossis sib npaug li 50 |
315 |
440-570 |
22% |
22 |
31 |
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50＜t Tsawg dua lossis sib npaug rau 70 |
315 |
440-570 |
22% |
26 |
38 |
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70＜t Tsawg dua lossis sib npaug rau 100 |
315 |
440-570 |
22% |
31 |
46 |
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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 DH32 siab zog khoom nyob rau hauv tempering thiab quenching |
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|
Qib |
|
Mechanical Property |
Charpy V Impact Test |
||||
|
Thickness |
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
|
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BV DH 32 |
mm |
Min Mpa |
Mpa |
Tsawg% |
-20 |
J |
J |
|
t Tsawg dua lossis sib npaug li 50 |
315 |
440-570 |
22% |
22 |
31 |
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50＜t Tsawg dua lossis sib npaug rau 70 |
315 |
440-570 |
22% |
26 |
48 |
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70＜t Tsawg dua lossis sib npaug rau 100 |
315 |
440-570 |
22% |
31 |
46 |
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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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