ABS DQ51 thiab CCS DQ51 yog ob qho tib si ntxiv - siab - lub zog quenched thiab tempered steel phaj tshwj xeeb uas tsim los rau cov kev xav tau tshaj plaws hauv marine thiab offshore engineering applications. Lawv tau lees paub los ntawm ob lub koom haum kev faib loj loj-ABS (American Bureau of Shipping) thiab CCS (China Classification Society)-thiab sawv cev rau qib siab zog nyob rau hauv DQ series, muab kev txhim kho qis dua -kub toughness haum rau cov khoom siv tseem ceeb.
ABS Qib DQ51 tau lees paub los ntawm American Bureau of Shipping. Lub npe "DQ51" qhia tias nws yog ib qho ntxiv - siab - lub zog steel nrog qhov tsawg kawg nkaus lub zog ntawm 500 MPa thiab lub zog tensile ntau ntawm 610-770 MPa . Qhov "D" qhia txog qhov ntsuas kub ntawm -20 degree, yuav tsum muaj qhov tsawg kawg nkaus Charpy V-Notch cuam tshuam lub zog ntawm 50J (ntev) lossis 33J (transverse). Cov phaj no yog tsim los siv cov txheej txheem kho cua sov siab xws li quenched thiab tempered (QT), normalizing, los yog thermomechanical tswj ua kom tiav lawv qhov tshwj xeeb ua ke ntawm lub zog thiab toughness. Cov ntawv thov muaj xws li offshore drilling platforms, shipbuilding, hull structures, decks, superstructures ntawm cov hlab ntsha loj, FPSOs, thiab tseem ceeb marine qauv ua hauj lwm nyob rau hauv txias ib puag ncig.
CCS Qib DQ51 tau ntawv pov thawj los ntawm Tuam Tshoj Classification Society thiab ua haujlwm ncaj nraim rau ABS DQ51 hauv Suav kev faib tawm. Raws li kev faib tawm hauv zej zog cov qauv, CCS DQ51 qhia cov cuab yeej cuab tam zoo ib yam nrog nws cov khoom siv ABS: yam tsawg kawg nkaus lub zog ntawm 500 MPa thiab tensile zog ntawm 610-770 MPa. Nws belongs rau tib tsev neeg cov khoom xws li AQ51, DQ51, EQ51, thiab FQ51 series rau nkoj tsim thiab offshore daim ntaub ntawv, nrog rau txhua tsab ntawv sawv cev rau qhov sib txawv ntawm qhov ntsuas kub. Zoo li ABS DQ51, CCS DQ51 xav kom Charpy cuam tshuam kev sim ntawm -20℃nrog rau qhov tsawg kawg nkaus lub zog raws li cov qauv ABS.
Qhov txawv tseem ceeb:
Qhov tseem ceeb ntawm qhov sib txawv ntawm ob qib no yog nyob rau hauv lawv daim ntawv pov thawj txoj cai thiab cov kev tswj xyuas zoo. ABS DQ51 ua raws li American Bureau of Shipping cov cai thiab tau lees paub thoob ntiaj teb, tshwj xeeb tshaj yog nyob rau hauv cov haujlwm uas yuav tsum tau muaj ntawv pov thawj ABS rau offshore platforms thiab nkoj destined rau ABS- classed fleets. CCS DQ51 ua raws li Tuam Tshoj Classification Society cov cai thiab feem ntau tau teev tseg rau cov qauv sab nrauv tsim hauv Suav nkoj nkoj lossis rau cov haujlwm hauv Suav kev faib tawm. Los ntawm kev pom kev, cov hlau no suav hais tias hloov pauv tau, thiab cov tuam txhab loj tuaj yeem tsim cov ntawv pov thawj los ntawm ob lub zej zog ib txhij.
Tshuaj muaj pes tsawg leeg
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ABS DQ51 Ntxiv muaj zog muaj zog tshuaj muaj nyob rau hauv Tempering thiab quenching |
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|
Qib |
Cov ntsiab lus Max (%) |
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|
C |
Si |
Mn |
P |
S |
N |
|
|
ABS DQ51 |
0.20 |
0.55 |
1.7 |
0.030 |
0.030 |
0.02 |
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CCS DQ51 Ntxiv cov tshuaj muaj zog muaj zog hauv Tempering thiab quenching |
| C max | Si max | Mn | P max | S max | N max. |
|
0.20 |
0.55 | 1.70 |
0.025 |
0.025 |
0.020 |
Mechanical Property
|
ABS DQ51 Ntxiv cov khoom muaj zog ntxiv hauv tempering thiab quenching |
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|
Qib |
Mechanical Property |
Charpy V Impact Test |
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|
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
|
|
Min Mpa |
Mpa |
Tsawg% |
-20 |
J |
J |
|
|
ABS DQ51 |
500 |
610-770 |
16 |
33 |
50 |
|
|
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev |
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CCS DQ51 Ntxiv cov khoom muaj zog ntxiv hauv tempering thiab quenching
| Yield zog (MPa) min. | Tensile zog (MPa) | Elongation min. % |
| 500 | 610-770 | 16 |
