Qhov sib txawv ntawm LR EH40 thiab LR EH42 steel phaj - Kev Paub

LR EH40 yog lub siab - lub zog shipbuilding 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 cuam tshuam ntawm -40 degree, ua rau nws tsim nyog rau cov nkoj ua haujlwm hauv qhov chaw txias heev xws li dej Arctic . Nws muaj qhov tsawg kawg nkaus yield zog ntawm 390 MPa thiab tensile lub zog ntawm 510 mus rau 650 MPa, nrog tsawg kawg elongation ntawm 20%. 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 feem ntau yog muab rau hauv qhov qub, quenched thiab tempered, lossis TMCP cov xwm txheej. Nws yog dav siv rau cov txheej txheem hull tseem ceeb, offshore platforms, thiab marine Cheebtsam uas xav tau zoo heev kub-kub toughness thiab zoo weldability.

LR EH42 yog ib qho ntxiv - 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 "42" qhia txog qhov tsawg kawg nkaus lub zog ntawm 420 MPa thiab lub zog tensile xws li 530 txog 680 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 20%. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 42J (ntev) lossis 28J (transverse) ntawm -40 degree. Cov tshuaj muaj pes tsawg leeg yog tswj nruj me ntsis nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.20% thiab manganese Tsawg dua lossis sib npaug li 1.70%. Qib no yog tsim los rau kev thov cov qauv siv ntau dua hauv kev tsim cov nkoj thiab offshore platforms xav tau lub zog zoo dua.

Ob leeg LR EH40 thiab LR EH42 yog LR- ntawv pov thawj ntxiv - 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 hauv qib siab: EH40 muaj qhov tsawg kawg nkaus lub zog ntawm 390 MPa nrog lub zog tensile ntawm 510-650 MPa, haum rau kev siv lub zog siab dav dav thiab cov qauv hauv ntug dej hiav txwv, thaum EH42 muab qhov siab tshaj qhov siab tshaj tawm lub zog ntawm 420 MPa nrog tensile zog-650 MPa kev thov ntau dua. xav tau superior zog. Ob chav kawm muaj cov tshuaj tswj cov tshuaj muaj pes tsawg leeg thiab tswj cov weldability zoo rau cov kev pabcuam tseem ceeb hauv hiav txwv.

Tshuaj muaj pes tsawg leeg

LR EH40 siab zog tshuaj muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 40	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 EH42 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH42	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 EH40 siab zog khoom
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 40	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	390	510-650	20%		26	39
	50＜t Tsawg dua lossis sib npaug rau 70	390	510-650	20%		31	46
	70＜t Tsawg dua lossis sib npaug rau 100	390	510-650	20%		37	55
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR EH42 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH42	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	420	530-680	20%		28	42
	50＜t Tsawg dua lossis sib npaug rau 70	420	530-680	20%		28	42
	70＜t Tsawg dua lossis sib npaug rau 100	420	530-680	20%		28	42
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev