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 nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.20% thiab manganese Tsawg dua lossis sib npaug li 1.70%, thiab nws yuav suav nrog cov khoom siv microalloying xws li Nb thiab V. Cov qib no feem ntau muab rau hauv cov xwm txheej normalized 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 D690 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℃(nrog qee tus neeg muag khoom kuj muab -60℃kuaj). Lub "690" qhia txog qhov tsawg kawg nkaus lub zog ntawm 690 MPa thiab lub zog tensile xws li 770 txog 940 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 14-16%. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 46J (transverse) thiab 69J (ntev) ntawm -20℃. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.21% 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. 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-deepwater offshore platforms, Arctic-class nkoj, thiab FPSO units xav tau qhov siab tshaj plaws-rau-hnyav piv.
Ob leeg RINA D420 thiab RINA D690 yog RINA - ntawv pov thawj 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 zog ntawm 530-680 MPa, haum rau siab - lub zog offshore platforms thiab dav shipbuilding, thaum D690 muab ib tug ntau dua yield zog tsawg kawg nkaus lub zog ntawm tensile zog ntawm tensile zog ntawm tensile zog. 770-940 MPa, tsim los rau cov kev xav tau tshaj plaws load-bearing daim ntawv thov uas yuav tsum tau ntau tshaj lub 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 0.20-0.21% thiab tswj cov kev sib txuas zoo rau cov kev pabcuam hauv hiav txwv tseem ceeb, txawm tias D690 yuav tsum tau ua tiav ntau dua li QT lossis TMCP kom ua tiav nws cov khoom siv zoo tshaj plaws.
RINA D420 ntxiv muaj zog Chemical Composition nyob rau hauv Tempering thiab quenching
|
Element |
RINA D420 Max % |
Element |
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 D690 ntxiv muaj zog Chemical Composition nyob rau hauv Tempering thiab quenching
|
Element |
RINA D690 Max % |
Element |
RINA D690 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 D690 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 |
|
|
TIAB SA D690 |
8-260 |
690 |
770-940 |
14 |
46J |
