RINA D420 yog ib qho ntxiv - siab - lub zog marine steel phaj ntawv pov thawj los ntawm Italian faib pawg neeg RINA (Registro Italiano Navale) rau kev tsim nkoj thiab kev siv sab nrauv. Qib "D" txhais tau hais tias nws raug kuaj ntawm -20 degree. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 420 MPa thiab tensile lub zog ntawm 530 mus rau 680 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 18%. 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 feem ntau yog muab rau hauv cov xwm txheej zoo li qub lossis quenched thiab tempered (QT) thiab muaj nyob rau hauv thicknesses txog 260mm. Nws yog dav siv rau cov qauv hull, offshore platforms, thiab tseem ceeb marine engineering Cheebtsam.
RINA D620 yog ib qho ultra-siab- lub zog marine steel phaj kuj tau ntawv pov thawj los ntawm RINA, nrog rau kev cuam tshuam toughness kuaj ntawm -20℃. Lub "620" qhia txog qhov tsawg kawg nkaus lub zog ntawm 620 MPa thiab lub zog tensile xws li 720 txog 890 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 15%. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.20% thiab manganese Tsawg dua lossis sib npaug li 1.70%, nrog rau cov khoom siv microalloying xws li Nb, V, Ti, Cr, Ni, thiab Mo rau cov khoom txhim kho. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 41J (transverse) ntawm -20℃. Qib no yuav tsum tau ua tiav qib siab thiab feem ntau yog muab rau hauv quenched thiab tempered (QT) lossis TMCP cov xwm txheej. Nws yog tsim los rau cov khoom siv uas xav tau tshaj plaws hauv kev tsim cov nkoj, ultra-cov dej tob hauv ntug dej hiav txwv, Arctic- cov nkoj hauv chav kawm, thiab FPSO units xav tau qhov siab tshaj plaws-rau-qhov hnyav piv.
Ob leeg RINA D420 thiab RINA D620 yog RINA - ntawv pov thawj ntxiv - siab - lub zog marine steels nrog zoo heev qis - kub toughness sim ntawm - 20 degree, kom ntseeg tau tias kev ua tau zoo nyob rau hauv hnyav marine ib puag ncig. Lawv qhov sib txawv tseem ceeb nyob rau hauv lub zog theem: D420 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 420 MPa nrog tensile lub zog ntawm 530-680 MPa, haum rau high-strength offshore platforms thiab dav shipbuilding, thaum.D620muab qhov siab tshaj qhov qis tshaj tawm lub zog ntawm 620 MPa nrog lub zog tensile ncav cuag 720-890 MPa, tsim los rau qhov xav tau tshaj plaws load-cov ntaub ntawv bearing xav tau lub zog siab tshaj plaws- rau qhov hnyav piv. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.20% thiab tswj kom muaj kev sib txuas zoo rau cov kev pabcuam hauv hiav txwv tseem ceeb, txawm tias D620 yuav tsum tau ua tiav ntau dua li QT lossis TMCP kom ua tiav nws cov khoom siv zoo dua.
RINA D420 ntxiv muaj zog Chemical Composition nyob rau hauv Tempering thiab quenching
|
Lub ntsiab |
RINA D420 Max % |
Lub ntsiab |
RINA D420 Max % |
|
C |
0.20 |
Ni |
0.40 |
|
Mn |
1.70 |
Mo |
0.08 |
|
Si |
0.10-0.55 |
Al |
0.020 min |
|
S |
0.030 |
Nb |
0.20-0.05 |
|
P |
0.030 |
V |
0.05-0.10 |
|
Cu |
0.35 |
Ti |
0.0007-0.05 |
|
Cr |
0.20 |
N |
|
RINA D620 ntxiv muaj zog Chemical Composition nyob rau hauv Tempering thiab quenching
|
Lub ntsiab |
RINA D620 Max % |
Lub ntsiab |
RID 620 Max % |
|
C |
0.20 |
Ni |
0.40 |
|
Mn |
1.70 |
Mo |
0.08 |
|
Si |
0.10-0.55 |
Al |
0.020 min |
|
S |
0.030 |
Nb |
0.20-0.05 |
|
P |
0.030 |
V |
0.05-0.10 |
|
Cu |
0.35 |
Ti |
0.0007-0.05 |
|
Cr |
0.20 |
N |
|
RINA D420 ntxiv lub zog muaj zog hauv Tempering thiab Quenching
|
Qib |
Thickness |
Yield zog |
Tensile zog |
Elongation |
Impact Zog |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
-20 degree |
|
|
TSI D420 |
8-260 |
420 |
530-680 |
18 |
28J |
RINA D620 ntxiv lub zog muaj zog hauv Tempering thiab Quenching
|
Qib |
Thickness |
Yield zog |
Tensile zog |
Elongation |
Impact Zog |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
-20 degree |
|
|
TSI D620 |
8-260 |
620 |
720-890 |
15 |
41J |
