ABS EQ47 thiab CCS EQ47 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 hiav txwv thiab ntug dej hiav txwv, tshwj xeeb tshaj yog cov uas yuav tsum tau muaj zog heev ntawm qhov kub thiab txias. Lawv tau ntawv pov thawj 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 "E" toughness tier hauv 47 kgf/mm² lub zog chav kawm.
ABS Qib EQ47 tau lees paub los ntawm American Bureau of Shipping. Lub npe "EQ47" qhia qhov tsawg kawg nkaus lub zog ntawm 460 MPa (67 ksi) thiab lub zog tensile ntau ntawm 570-720 MPa (83-104 ksi). Tus "E" qhia txog Charpy V-notch cuam tshuam qhov ntsuas kub ntawm -40℃(-40℃F), yuav tsum muaj lub zog nruab nrab ntawm 46J (ntev) lossis 31J (transverse). Cov phaj no yog tsim los siv ob qho tib si quenched thiab tempered (QT) los yog thermo-mechanical control processing (TMCP) kom ua tiav lawv qhov tshwj xeeb ua ke ntawm lub zog thiab tawv, nrog microstructures muaj xws li acicular ferrite thiab refined granular bainite. Cov ntawv thov ib txwm muaj xws li offshore drilling platforms, nkoj hulls, icebreaker nkoj, thiab tseem ceeb marine qauv ua hauj lwm nyob rau hauv Arctic tej yam kev mob.
CCS Qib EQ47 tau ntawv pov thawj los ntawm Tuam Tshoj Classification Society thiab ua haujlwm ncaj nraim rau ABS EQ47 hauv Suav teb kev faib tawm. Raws li kev faib tawm hauv zej zog cov qauv, CCS EQ47 qhia cov cuab yeej cuab tam zoo ib yam nrog nws cov khoom siv ABS: yam tsawg kawg nkaus lub zog ntawm 460 MPa thiab tensile zog ntawm 570-720 MPa. Nws belongs rau tib tsev neeg cov khoom xws li AQ47, DQ47, EQ47, thiab FQ47 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 EQ47, CCS EQ47 xav tau Charpy qhov kev ntsuam xyuas ntawm -40℃nrog tsawg kawg yog 47J lub zog, thiab rau Arctic kev pabcuam tuaj yeem ua tiav -60℃toughness.
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 EQ47 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 cov ntug dej hiav txwv thiab cov nkoj uas tau los rau ABS- cov nkoj nkoj. CCS EQ47 ua raws li Tuam Tshoj Classification Society cov cai thiab feem ntau tau teev tseg rau cov qauv hauv ntug dej hiav txwv ua nyob rau hauv Suav shipyards los yog rau tej yaam num nyob rau hauv Suav faib. Qhov tseem ceeb loj - cov haujlwm loj xws li cov dej tob tob -submersible drilling platforms tau siv ABS thiab CCS ntawv pov thawj EQ47 steel ib txhij.
Los ntawm kev pom kev, cov hlau no suav tias yog hloov pauv tau, thiab cov tuam txhab loj tuaj yeem tsim cov ntawv pov thawj los ntawm ob lub zej zog ib txhij. Qhov kev xaiv ntawm lawv feem ntau yog txiav txim siab los ntawm tus chij xeev ntawm lub nkoj, kev nyiam ntawm nkoj nkoj, lossis cov kev xav tau tshwj xeeb. Ob qib yuav tsum tau muab nrog daim ntawv pov thawj zeb xeem (MTC) bearing kev faib pawg neeg soj ntsuam kev kos npe thiab tuaj yeem tsim nrog ntau yam kev xa khoom xws li quenched thiab tempered, TMCP, lossis normalized nyob ntawm thickness yuav tsum tau.
Tshuaj muaj pes tsawg leeg
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ABS EQ47 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 EQ47 |
0.20 |
0.55 |
1.7 |
0.035 |
0.035 |
0.02 |
CCS EQ47 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
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ABS EQ47 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% |
-40 |
J |
J |
|
|
ABS EQ47 |
460 |
570-720 |
17 |
31 |
46 |
|
|
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev |
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CCS EQ47 Ntxiv cov khoom muaj zog ntxiv hauv tempering thiab quenching |
| Yield zog (MPa) min. | Tensile zog (MPa) | Elongation min. % |
| 460 | 570-720 | 17 |
