ABS DQ47 yog ib qho ntxiv - siab - lub zog marine steel phaj ntawv pov thawj los ntawm American Bureau of Shipping (ABS), ua los ntawm quenching thiab tempering (Q&T). Qhov kev xaiv "DQ" qhia tias nws raug kuaj ntawm -20 degree. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 460 MPa thiab tensile lub zog ntawm 570 mus rau 720 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 17%. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 46J (ntev) lossis 31J (transverse) ntawm -20 degree. Cov qib no muaj kev ua tau zoo heev thiab kev sib txuas, thiab tau siv dav hauv kev tsim khoom hauv nkoj, kev lag luam tawm ntug dej hiav txwv, thiab cov qauv hauv hiav txwv.
ABS DQ56 yog ib qho ultra- siab- lub zog marine steel phaj kuj tau ntawv pov thawj los ntawm ABS, ua los ntawm quenching thiab tempering (Q&T). Lub "56" qhia txog qhov tsawg kawg nkaus lub zog ntawm 550 MPa thiab tensile lub zog ntawm 670 txog 835 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 16%. Kev ntsuam xyuas cuam tshuam yog ua nyob rau ntawm -20 degree, nrog rau qhov tsawg kawg nkaus lub zog ntawm 55J (ntev) lossis 37J (transverse). Cov tshuaj muaj pes tsawg leeg muaj cov ntsiab lus npib tsib xee ntawm 8.0-9.5% txhawm rau txhim kho qhov kub thiab txias. Qib no yog tsim los rau cov txheej txheem tseem ceeb hauv ntug dej hiav txwv, suav nrog cov jack-up rigs thiab platforms hauv qhov chaw hnyav.
ABS DQ47 thiab ABS DQ56 yog ABS- ntawv pov thawj, quenched thiab tempered ultra- siab- lub zog marine steels nrog zoo heev toughness rau kev thov offshore daim ntaub ntawv. Lawv qhov sib txawv tseem ceeb nyob rau hauv lub zog thiab cov ntsiab lus alloy: DQ47 muaj qhov tsawg kawg nkaus lub zog ntawm 460 MPa nrog tensile lub zog ntawm 570-720 MPa, haum rau siab - lub zog shipbuilding thiab offshore platforms , thaum DQ56 muab ib tug ntau dua yield zog ntawm 550 MPa, nce mus txog 3. Cov ntsiab lus tseem ceeb ntawm npib tsib xee (8.0-9.5%) rau kev ua tau zoo ntawm qhov kub thiab txias hauv qhov xav tau tshaj plaws nyob rau sab nrauv. Ob qib tswj tau zoo weldability thiab yog qhov tseem ceeb rau kev siv cov txheej txheem marine tseem ceeb.
Tshuaj muaj pes tsawg leeg
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ABS DQ47 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 DQ47 |
0.20 |
0.55 |
1.7 |
0.035 |
0.035 |
0.02 |
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ABS DQ56 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 DQ56 |
0.20 |
0.55 |
1.7 |
0.030 |
0.030 |
0.02 |
Mechanical Property
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ABS DQ47 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 DQ47 |
460 |
570-720 |
17 |
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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ABS DQ56 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 DQ56 |
550 |
670-835 |
16 |
37 |
55 |
|
|
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev |
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