Qhov txawv ntawm LR AH42 thiab LR AH50 steel phaj - Kev Paub

LR AH42 yog ib qho ntxiv - siab - lub zog marine steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR) rau kev tsim nkoj thiab kev siv sab nrauv. Qib "A" txhais tau hais tias nws raug kuaj xyuas ntawm 0 degree, kom ntseeg tau tias muaj zog txaus rau cov dej hiav txwv dav dav. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 420 MPa thiab tensile lub zog ntawm 530 mus rau 680 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 20%. Cov tshuaj muaj pes tsawg leeg yog tswj nruj me ntsis nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.21% thiab manganese Tsawg dua lossis sib npaug li 1.70%, thiab nws feem ntau muab nkag rau hauv cov xwm txheej zoo li qub lossis TMCP.

LR AH50 yog ib qho ntxiv - siab - lub zog marine steel phaj kuj tau lees paub los ntawm Lloyd's Register (LR), tsim los rau kev thov ntau yam kev siv. Nws yog qhov cuam tshuam rau kev sim ntawm 0℃thiab muaj 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%. Cov tshuaj lom neeg muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.21% thiab manganese Tsawg dua lossis sib npaug li 1.70%, nrog cov ntsiab lus microalloying xws li Nb thiab V los txhim kho lub zog thaum tswj kev weldability. Cov qib no yog siv rau cov khoom tseem ceeb hauv cov nkoj loj thiab cov chaw tawm sab nrauv uas xav tau lub zog zoo dua - rau - qhov hnyav piv .

Ob leeg LR AH42 thiab LR AH50 yog LR- ntawv pov thawj ntxiv - siab- lub zog marine steels nrog rau kev cuam tshuam toughness kuaj ntawm 0 degree, kom ntseeg tau tias kev ua tau zoo nyob rau hauv ib puag ncig marine. Lawv qhov sib txawv tseem ceeb nyob rau hauv lub zog theem: AH42 muaj qhov tsawg kawg nkaus lub zog ntawm 420 MPa nrog tensile lub zog ntawm 530-680 MPa, haum rau siab - lub zog hull kev tsim kho, thaum AH50 muab qhov siab tshaj qhov siab tshaj tawm lub zog ntawm 500 MPa nrog tensile lub zog ntau dua rau kev thov mus txog 170 MPa, thauj khoom-cov ntawv thov cov kabmob uas xav tau lub zog-rau-hnyav piv piv. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.21% thiab tswj cov weldability zoo rau kev pabcuam tseem ceeb hauv hiav txwv. Qhov kev xaiv ntawm lawv nyob ntawm seb qhov project xav tau lub zog sib npaug ntawm AH42 lossis qhov kev ua tau zoo ntawm AH50 rau kev xav tau ntau yam qauv.

Tshuaj muaj pes tsawg leeg

LR AH42 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR AW 42	0.21	0.55	1.70	0.035	0.035	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

LR AH50 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR AH 50	0.21	0.55	1.70	0.035	0.035	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

Mechanical Property

LR AH42 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR AW 42	mm	Min Mpa	Mpa	Tsawg%	0	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

LR AH50 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR AH 50	mm	Min Mpa	Mpa	Tsawg%	0	J	J
	t Tsawg dua lossis sib npaug li 50	500	610-770	18%		33	50
	50＜t Tsawg dua lossis sib npaug rau 70	500	610-770	18%		33	50
	70＜t Tsawg dua lossis sib npaug rau 100	500	610-770	18%		33	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

Qhov sib txawv ntawm LR AH42 thiab LR AH50 steel phaj