ABS EQ51 yog ib qho ultra-siab- lub zog marine steel phaj ntawv pov thawj los ntawm American Bureau of Shipping (ABS), feem ntau ua los ntawm quenching thiab tempering (Q&T). Lub npe "E" txhais tau hais tias nws raug kuaj ntawm -40℃. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 500 MPa (73 ksi) thiab lub zog tensile xws li 610 txog 770 MPa (88-112 ksi), nrog qhov tsawg kawg nkaus elongation ntawm 16%. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 33J (transverse) lossis 50J (ntev) ntawm -40 degree. Cov qib no yog siv dav hauv cov chaw ua haujlwm sab nrauv, nkoj hulls, thiab cov txheej txheem tseem ceeb hauv hiav txwv uas xav tau lub zog siab thiab qhov kub thiab txias.
ABS EQ70 yog ib qho ultra- siab- lub zog marine steel phaj kuj tau ntawv pov thawj los ntawm ABS, tsim los siv cov txheej txheem quenching thiab tempering (Q&T) . Lub "70" qhia txog qhov tsawg kawg nkaus lub zog ntawm 690 MPa (100 ksi) thiab lub zog tensile xws li 770 txog 940 MPa (112-136 ksi), nrog qhov tsawg kawg nkaus elongation ntawm 14%. Kev ntsuam xyuas cuam tshuam yog ua ntawm -40 degree, nrog rau qhov tsawg kawg nkaus lub zog ntawm 41J (transverse) lossis 62J (ntev ntev). Cov tshuaj muaj pes tsawg leeg yog tswj nruj me ntsis nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.20% thiab manganese Tsawg dua lossis sib npaug li 1.70%. Qib no yog tsim los rau cov kev xav tau tshaj plaws nyob rau sab ntug dej hiav txwv, suav nrog cov chaw drilling, jack-up rig ob txhais ceg, thiab cov nkoj tsim khoom ntab (FPSOs).
ABS EQ51 thiab ABS EQ70 yog ABS- ntawv pov thawj ultra- siab- lub zog marine steels tsim los ntawm quenching thiab tempering, nrog zoo heev qis- kub toughness kuaj ntawm -40℃rau kev txhim khu kev qha nyob rau hauv hnyav marine ib puag ncig. Lawv qhov sib txawv tseem ceeb nyob rau hauv lub zog theem: EQ51 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 500 MPa nrog tensile zog ntawm 610-770 MPa, haum rau siab - lub zog offshore platforms thiab shipbuilding , thaum EQ70 muab ib tug ntau dua yield zog tsawg kawg nkaus ntawm tensile zog ntawm 690 MPa. 770-940 MPa, tsim los rau cov kev xav tau tshaj plaws load-bearing daim ntaub ntawv uas yuav tsum tau ntau tshaj lub zog-rau-hnyav piv. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg thiab tswj cov weldability zoo rau kev siv cov txheej txheem marine tseem ceeb.
Tshuaj muaj pes tsawg leeg
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ABS EQ51 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 EQ51 |
0.20 |
0.55 |
1.7 |
0.030 |
0.030 |
0.02 |
|
ABS EQ70 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 EQ 70 |
0.20 |
0.55 |
1.7 |
0.030 |
0.030 |
0.02 |
Mechanical Property
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ABS EQ51 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 EQ51 |
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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|
ABS EQ70 Ntxiv cov khoom muaj zog ntxiv hauv tempering thiab quenching |
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|
Qib |
Mechanical Property |
Charpy V Impact Test |
||||
|
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
|
|
Min Mpa |
Mpa |
Tsawg% |
-40 |
J |
J |
|
|
ABS EQ 70 |
690 |
770-940 |
14 |
41 |
62 |
|
|
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev |
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