Dab tsi yog qhov txawv ntawm LR EH36 thiab LR EH50 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 raug kuaj xyuas ntawm -40 ° C, kom ntseeg tau tias muaj zog zoo rau cov 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 620 MPa. Qhov tsawg kawg nkaus elongation yog 21%. Cov tshuaj muaj pes tsawg leeg yog nruj me ntsis tswj nrog carbon ≤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, cov lawj, thiab cov khoom siv tseem ceeb ntawm cov nkoj ua haujlwm hauv cov dej hiav txwv hnyav.

LR EH50 yog ib qho ntxiv - 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 ° C . Lub "50" qhia txog qhov tsawg kawg nkaus tawm lub zog ntawm 500 MPa . Nws muaj lub zog tensile ntau dua li ntawm 610 txog 770 MPa thiab qhov tsawg kawg nkaus elongation ntawm 18% rau thicknesses txog 100 hli. Kev cuam tshuam lub zog yuav tsum muaj tsawg kawg yog 50J (ntev) lossis 33J (transverse) ntawm -40 ° C . Cov tshuaj muaj pes tsawg leeg nta carbon ≤0.20%, manganese ≤1.70%, nrog microalloying ntsiab xws li Nb, V, thiab Ti. Qib no yog tsim los rau kev xav tau cov khoom siv hauv kev tsim khoom hauv nkoj, offshore platforms, thiab cov qauv hauv hiav txwv uas xav tau lub zog-rau-qhov hnyav piv.

Ob leeg LR EH36 thiab LR EH50 yog LR- ntawv pov thawj siab - lub zog marine steels nrog zoo heev qis- kub toughness kuaj ntawm -40 ° C, ua kom ntseeg tau 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: EH36 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa nrog lub zog tensile ntawm 490-620 MPa, haum rau kev siab dav - lub zog hull kev tsim kho, thaum EH50 muab qhov siab tshaj qhov qis tshaj tawm lub zog ntawm 500 MPa nrog lub zog tensile ntau tshaj 500 MPa, ntau dua {1610 MPa, ncav cuag { xav tau daim ntawv thov load-bearing yuav tsum tau superior zog-rau-hnyav piv. Ob chav kawm muaj cov tshuaj tiv thaiv muaj pes tsawg leeg thiab tswj cov weldability zoo rau cov kev pabcuam tseem ceeb hauv hiav txwv.

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 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

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≤50	355	490-630	21%		24	34
	50 t 70	355	490-630	21%		27	41
	70＜t≤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 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≤50	500	610-770	18%		33	50
	50 t 70	500	610-770	18%		33	50
	70＜t≤100	500	610-770	18%		33	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev