Qhov sib txawv ntawm LR EH32 thiab LR EH62 steel phaj - Kev Paub

LR EH32 yog lub siab - lub zog shipbuilding steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR). Qib "E" txhais tau hais tias nws raug kuaj ntawm -40 degree, nrog qhov cuam tshuam tsawg kawg nkaus ntawm 31J (ntev) rau thicknesses txog 50mm. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 315 MPa (46 ksi) thiab lub zog tensile xws li 440 txog 590 MPa (64-83 ksi), nrog qhov tsawg kawg nkaus elongation ntawm 22%. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.18% thiab manganese 0.90-1.60%. Qib no yog siv dav rau cov qauv hull, offshore platforms, thiab marine Cheebtsam uas xav tau weldability zoo thiab tsis tshua muaj kub toughness.

LR EH62 yog ib qho ultra-siab- lub zog marine steel phaj kuj tau ntawv pov thawj los ntawm Lloyd's Register (LR) nrog rau kev cuam tshuam toughness kuaj ntawm -40℃. Lub "62" qhia txog qhov tsawg kawg nkaus lub zog ntawm 620 MPa thiab lub zog tensile xws li 720 txog 890 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 17% rau thicknesses txog 100 hli. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 62J (ntev) lossis 41J (transverse) ntawm -40℃. 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%, nrog cov ntsiab lus microalloying suav nrog Nb, V, Ti, Cu, Cr, Ni, thiab Mo. Cov qib no yuav tsum tau ua tiav zoo li TMCP lossis quenching thiab tempering thiab yog tsim los rau cov txheej txheem tseem ceeb tshaj plaws hauv kev tsim cov nkoj niaj hnub thiab sab nrauv engineering, muab qhov tshwj xeeb ntawm lub zog-rau-qhov hnyav piv.

Ob leeg LR EH32 thiab LR EH62 yog LR- ntawv pov thawj 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 thawj qhov sib txawv yog nyob rau hauv lub zog theem: EH32 muaj qhov tsawg kawg nkaus yield zog ntawm 315 MPa nrog tensile lub zog ntawm 440-590 MPa, haum rau dav dav-lub zog hull kev tsim kho thiab theem nrab cov qauv, thaum EH62 muab ib tug ntau dua yield tsawg kawg nkaus lub zog ntawm 620 MPa nrog tensile xav tau - 9. 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 EH62 yuav tsum tau ua ntau yam zoo li TMCP lossis QT 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 EH32 siab zog tshuaj muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 32	0.18	0.05	0.9-1.6	0.035	0.035	0.015
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02	0.35	0.20	0.40	0.08

LR EH62 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 62	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 EH32 siab zog khoom
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 32	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	315	440-590	22%		20	31
	50＜t Tsawg dua lossis sib npaug rau 70	315	440-590	22%		26	38
	70＜t Tsawg dua lossis sib npaug rau 100	315	440-590	22%		31	46
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR EH62 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 62	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	620	720-890	17%		41	62
	50＜t Tsawg dua lossis sib npaug rau 70	620	720-890	17%		41	62
	70＜t Tsawg dua lossis sib npaug rau 100	620	720-890	17%		41	62
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev