Dab tsi yog qhov txawv ntawm LR EH32 thiab LR EH50 steel phaj? - Kev Paub

LR EH32 yog lub siab - lub zog steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR) rau kev tsim khoom nkoj thiab kev siv dej hiav txwv. Qib "E" txhais tau hais tias nws raug kuaj ntawm -40 ° C, nrog qhov cuam tshuam tsawg kawg 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 nta carbon ≤0.18% thiab manganese 0.90-1.60%. Qib no yog siv dav rau cov qauv hull, offshore platforms, thiab cov khoom siv dej hiav txwv dav dav uas yuav tsum tau muaj qhov zoo weldability thiab qis-kub toughness.

LR EH50 yog ib qho ultra-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 lub zog ntawm 500 MPa thiab lub zog tensile xws li 610 txog 770 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 50J (ntev) lossis 33J (transverse) ntawm -40 ° C. Cov tshuaj muaj pes tsawg leeg nta carbon ≤0.20% thiab manganese ≤1.70%. Cov qib no yog tsim los rau kev xav tau cov khoom siv hauv cov thawv ntim loj, cov dej khov- txhawb nqa lub nkoj, thiab cov chaw tawm ntug dej hiav txwv uas xav tau lub zog-rau-qhov hnyav.

Ob leeg LR EH32 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. Lawv qhov sib txawv tseem ceeb nyob hauv qib siab: EH32 muaj qhov tsawg kawg nkaus lub zog ntawm 315 MPa nrog lub zog tensile ntawm 440-590 MPa, haum rau kev siab dav - lub zog hull kev tsim kho, thaum EH50 muab qhov siab tshaj qhov tsawg kawg nkaus lub zog ntawm 500 MPa nrog lub zog tensile ntau tshaj 500 MPa, ntau dua tensile ncav cuag { xav tau daim ntawv thov load-bearing yuav tsum tau superior zog-rau-hnyav piv. Ob qib tshwj xeeb tswj cov tshuaj lom neeg muaj pes tsawg leeg, tab sis EH50 feem ntau xav tau kev ua haujlwm siab dua li TMCP kom ua tiav nws cov khoom siv kho kom zoo 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 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 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≤50	315	440-590	22%		20	31
	50 t 70	315	440-590	22%		26	38
	70＜t≤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 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