Qhov sib txawv ntawm LR EH32 thiab LR EH69 steel phaj - Kev Paub

LR EH32 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 raug kuaj ntawm -40 degree. 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). Qhov tsawg kawg nkaus elongation yog 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%. Nws muaj qhov zoo weldability thiab yog dav siv rau cov qauv hull thiab cov khoom siv hauv hiav txwv.

LR EH69 yog ib qho ultra-siab- lub zog marine steel phaj kuj tau ntawv pov thawj los ntawm 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%. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 69J (ntev) ntawm -40℃. Cov tshuaj muaj pes tsawg leeg suav nrog carbon Tsawg dua lossis sib npaug li 0.20% thiab manganese Tsawg dua lossis sib npaug li 1.70%, nrog cov ntsiab lus microalloying. Qib no yog tsim los rau cov khoom tseem ceeb tshaj plaws -cov kabmob, xws li hauv cov nkoj loj loj thiab Arctic-chav nyob sab nraud.

Ob leeg LR EH32 thiab LR EH69 yog LR- ntawv pov thawj steels nrog zoo heev qis- kub toughness kuaj ntawm -40℃. Lawv lub ntsiab sib txawv yog nyob rau hauv lub zog theem: EH32 yog ib tug siab -lub zog steel (315 MPa tawm los) haum rau lub dav siv hull, thaum EH69 yog ib tug ultra- siab- lub zog steel (690 MPa yield) tsim los rau cov feem ntau xav tau load{14}. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg, tab sis EH69 yuav tsum tau ua kom zoo dua qub xws li quenching thiab tempering kom ua tiav nws cov khoom zoo dua.

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 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 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 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