RINA D460 yog ib qho ntxiv - siab - lub zog marine steel phaj tau 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 460 MPa thiab tensile lub zog ntawm 570 txog 720 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 17%. Cov tshuaj muaj pes tsawg leeg yog tswj hwm nruj nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.21% thiab manganese Tsawg dua lossis sib npaug li 1.70%, thiab nws suav nrog cov ntsiab lus microalloying xws li Nb thiab V. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 28J (transverse) thiab 42J (ntev) ntawm -20 degree. Cov qib no feem ntau yog muab rau hauv qhov qub, quenched thiab tempered (QT), lossis TMCP cov xwm txheej thiab muaj nyob rau hauv thicknesses txog 260 hli. Nws yog dav siv rau offshore drilling platforms, hull structures, thiab FPSO nkoj.
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℃rau thicknesses hauv qab 150mm. 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 D460 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: D460 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 460 MPa nrog tensile zog ntawm 570-720 MPa, haum rau siab - lub zog offshore platforms thiab dav shipbuilding, thaum D620 muab ib tug ntau ntau dua yielding lub zog ntawm tensile zog ntawm tensile zog. 720-890 MPa, tsim los rau cov kev xav tau tshaj plaws load-bearing daim ntawv thov uas xav tau ntau tshaj lub zog-rau-qhov hnyav piv. Ob qib tshwj xeeb nruj tswj cov tshuaj muaj pes tsawg leeg nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.20-0.21% thiab tswj kom zoo weldability rau cov kev pabcuam tseem ceeb hauv hiav txwv, txawm tias D620 yuav tsum muaj kev sib xyaw ua ke ntau dua thiab ua tiav zoo li QT lossis TMCP kom ua tiav nws cov khoom siv zoo tshaj plaws. Qhov kev xaiv ntawm lawv nyob ntawm seb qhov project xav tau qhov sib npaug ntawm D460 lossis qhov kev ua tau zoo ntawm D620 rau kev xav tau ntau yam qauv.
RINA D460 ntxiv muaj zog Chemical Composition nyob rau hauv Tempering thiab quenching
|
Lub ntsiab |
RINA D460 Max % |
Lub ntsiab |
RINA D460 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 |
RID 620 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 D460 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 D460 |
8-260 |
460 |
570-720 |
17 |
31J |
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 620 |
8-260 |
620 |
720-890 |
15 |
41J |
