Qhov sib txawv ntawm LR EH50 thiab LR EH69 steel phaj - Kev Paub

LR EH50 yog ib qho ntxiv -siab- lub zog marine steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR). Lub npe "EH" txhais tau hais tias nws yog ib qho ntxiv - siab - qib zog nrog kev cuam tshuam toughness kuaj ntawm -40 degree, ua kom muaj kev ua tau zoo hauv cov cheeb tsam hnyav xws li dej Arctic . Nws muaj 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 18% rau thicknesses txog 100 hli. 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 cov ntsiab lus microalloying xws li Nb thiab V. Cov qib no feem ntau yog muab rau hauv TMCP lossis cov xwm txheej zoo li qub thiab tau siv dav rau cov qauv hull tseem ceeb thiab cov chaw sab nrauv.

LR EH69 yog ib qho ultra-siab- lub zog marine steel phaj kuj tau lees paub los ntawm Lloyd's Register (LR) nrog rau kev cuam tshuam toughness kuaj ntawm -40℃. Lub "69" 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 16% rau thicknesses txog 100 hli. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 69J (ntev) lossis 46J (transverse) ntawm -40℃. Cov tshuaj muaj pes tsawg leeg yog tswj hwm nruj nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.20% thiab manganese Tsawg dua lossis sib npaug li 1.70%, muaj cov ntsiab lus microalloying suav nrog Nb, V, Ti, thiab feem ntau Ni. Cov qib no yog tsim los rau cov khoom siv uas xav tau tshaj plaws nyob rau hauv ultra- cov nkoj loj, hnyav- nqa nkoj, thiab Arctic - chav nyob sab ntug dej hiav txwv uas xav tau qhov siab tshaj plaws-rau-qhov hnyav piv.

Ob leeg LR EH50 thiab LR EH69 yog LR- ntawv pov thawj ultra- siab- lub zog marine steels nrog zoo heev qis- kub toughness kuaj ntawm -40 degree, kom ntseeg tau tias kev ua tau zoo nyob rau hauv hnyav marine ib puag ncig nrog rau Arctic tej yam kev mob. Lawv qhov sib txawv tseem ceeb nyob rau hauv lub zog theem: EH50 muaj qhov tsawg kawg nkaus lub zog ntawm 500 MPa nrog tensile lub zog ntawm 610-770 MPa, haum rau high-strength hull kev tsim kho thiab xav tau offshore lug, thaum EH69 muab ib tug tseem ceeb ntau yam tsawg kawg nkaus yield zog ntawm 690 MPa nrog rau lub tensile 70-700, tensile zog 70. load-bearing daim ntawv thov yuav tsum tau txo qhov hnyav tshaj plaws. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg, tab sis EH69 yuav tsum tau ua ntau yam zoo li quenching thiab tempering (Q&T) kom ua tiav nws cov khoom siv zoo tshaj plaws thaum tuav cov weldability zoo rau kev pabcuam marine tseem ceeb.

Tshuaj muaj pes tsawg leeg

LR EH50 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 50	0.20	0.55	1.70	0.030	0.030	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

LR EH69 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 69	0.20	0.55	1.70	0.030	0.030	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

Mechanical Property

LR EH50 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 50	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	500	610-770	18%		33	50
	50＜t Tsawg dua lossis sib npaug rau 70	500	610-770	18%		33	50
	70＜t Tsawg dua lossis sib npaug rau 100	500	610-770	18%		33	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR EH69 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 69	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	690	770-940	16%		46	69
	50＜t Tsawg dua lossis sib npaug rau 70	690	770-940	16%		46	69
	70＜t Tsawg dua lossis sib npaug rau 100	690	770-940	16%		46	69
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev