Qhov sib txawv ntawm LR EH36 thiab LR EH55 steel phaj - Kev Paub

LR EH36 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 muaj kev cuam tshuam los ntawm kev sim ntawm -40 degree, kom ntseeg tau tias muaj zog zoo rau kev siv huab cua txias xws li kev ua haujlwm hauv Arctic . Nws muaj qhov tsawg kawg nkaus lub zog ntawm 355 MPa thiab tensile lub zog ntawm 490 txog 630 MPa. Qhov tsawg kawg nkaus elongation yog 21%. Cov tshuaj muaj pes tsawg leeg yog nruj me ntsis tswj nrog carbon Tsawg dua los yog sib npaug rau 0.18% thiab manganese 0.90-1.60%. Cov qib no yog siv dav rau kev tsim kho lub nkoj, cov chaw tawm sab nrauv, thiab cov khoom siv tseem ceeb ntawm cov nkoj ua haujlwm hauv cov dej hiav txwv hnyav.

LR EH55 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 "55" qhia txog qhov tsawg kawg nkaus lub zog ntawm 550 MPa thiab lub zog tensile xws li 670 txog 830 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 18% rau thicknesses txog 100 hli. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 55J (ntev) lossis 37J (transverse) ntawm -40 degree. 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 thiab V. Qib no yog tsim los rau cov tswv cuab tseem ceeb, muaj kev ntxhov siab heev hauv kev tsim cov nkoj thiab xav tau cov ntawv thov sab nrauv.

Ob leeg LR EH36 thiab LR EH55 yog LR- ntawv pov thawj 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. Lawv qhov sib txawv tseem ceeb nyob hauv qib siab: EH36 muaj qhov tsawg kawg nkaus lub zog ntawm 355 MPa nrog lub zog tensile ntawm 490-630 MPa, haum rau kev siv lub zog siab dav dav thiab cov qauv sab nrauv, thaum EH55 muab qhov muaj zog ntau dua qhov tsawg kawg nkaus lub zog ntawm 550 MPa nrog ntau lub zog tensile, ncav cuag 6070. load-bearing daim ntawv thov yuav tsum tau superior zog. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg, nrog EH55 feem ntau xav tau kev ua haujlwm siab dua kom ua tiav nws cov khoom siv kho kom zoo dua qub thaum tuav cov weldability zoo rau kev pabcuam marine tseem ceeb.

Tshuaj muaj pes tsawg leeg

LR EH36 siab zog tshuaj muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 36	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 EH55 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH55	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 EH36 siab zog khoom
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 36	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	355	490-630	21%		24	34
	50＜t Tsawg dua lossis sib npaug rau 70	355	490-630	21%		27	41
	70＜t Tsawg dua lossis sib npaug rau 100	355	490-630	21%		34	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR EH55 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH55	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	550	670-830	18%		37	55
	50＜t Tsawg dua lossis sib npaug rau 70	550	670-830	18%		37	55
	70＜t Tsawg dua lossis sib npaug rau 100	550	670-830	18%		37	55
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev