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" qhia tau hais tias nws raug kuaj ntawm -20 ° C. 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 nruj me ntsis tswj nrog carbon ≤0.20%, manganese ≤1.70%, thiab microalloying ntsiab. 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 D460 yog ib qho ntxiv -siab- lub zog marine steel phaj kuj tau ntawv pov thawj los ntawm RINA, nrog rau kev cuam tshuam toughness kuaj ntawm -20 ° C . Lub "460" qhia txog qhov tsawg kawg nkaus lub zog ntawm 460 MPa thiab lub zog tensile xws li 570 txog 720 MPa, nrog 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 ° C . Cov tshuaj muaj pes tsawg leeg nta carbon ≤0.21%, manganese ≤1.70%, nrog kev tswj nruj ntawm phosphorus thiab sulfur. Qib no yog tsim los rau kev xav tau cov khoom siv hauv kev tsim khoom hauv nkoj, offshore platforms, thiab Arctic -cov nkoj hauv chav kawm uas xav tau lub zog-rau-qhov hnyav piv.
Ob leeg RINA D420 thiab RINA D460 yog RINA - ntawv pov thawj ntxiv - siab - lub zog marine steels nrog zoo heev qis - kub toughness sim ntawm - 20 ° C, ua kom ntseeg tau 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 D460 muab ib tug tsawg kawg nkaus yield zog ntawm 470}770 tensile {0} 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 carbon ≤0.20-0.21% thiab tswj cov weldability zoo rau kev pabcuam marine tseem ceeb, nrog D460 feem ntau yuav tsum tau ua tiav ntau dua kom ua tiav nws cov khoom siv kho kom zoo. Kev xaiv ntawm lawv nyob ntawm seb qhov project yuav tsum muaj lub zog sib npaug ntawm D420 lossis qhov kev ua tau zoo ntawm D460 rau kev xav tau ntau yam qauv.
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 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 |
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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 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 |
