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%. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 31J (transverse) thiab 46J (ntev) ntawm -20 degree. Cov tshuaj muaj pes tsawg leeg yog tswj nruj me ntsis nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.21% thiab manganese Tsawg dua lossis sib npaug li 1.70%. 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 cov qauv hull, offshore platforms, thiab tseem ceeb marine engineering Cheebtsam.
RINA D500 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 "500" qhia txog qhov tsawg kawg nkaus lub zog ntawm 500 MPa thiab lub zog tensile xws li 610 txog 770 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 16%. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 33J (ntev) ntawm -20℃. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.20%, manganese Tsawg dua lossis sib npaug li 1.70%, thiab suav nrog cov ntsiab lus xws li npib tsib xee thiab tooj liab txhawm rau txhim kho corrosion kuj nyob rau hauv marine ib puag ncig. Cov qib no yog tsim los rau cov khoom siv uas xav tau tshaj plaws hauv kev tsim cov nkoj, cov chaw tawm sab nrauv, thiab FPSO cov nkoj uas xav tau lub zog-rau-qhov hnyav piv.
Ob leeg RINA D460 thiab RINA D500 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 D500 muab ib tug tsawg kawg nkaus yield zog ntawm 501} 720 MPa {00% tensile MPa, tsim los rau kev thov ntau dua load-bearing daim ntawv thov uas yuav tsum tau superior zog-rau-hnyav piv. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.21% thiab tswj kom muaj kev sib txuas zoo rau kev pabcuam marine tseem ceeb, nrog D500 muab kev txhim kho corrosion los ntawm nickel thiab tooj liab ntxiv.
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 D500 ntxiv muaj zog tshuaj lom neeg muaj pes tsawg leeg hauv Tempering thiab quenching
|
Lub ntsiab |
RINA D500 Max % |
Lub ntsiab |
RINA D500 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 D500 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 |
|
RINA D500 |
8-260 |
500 |
610-770 |
16 |
33J |
