Qhov sib txawv ntawm LR AH42 thiab LR AH46 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 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. Qib no feem ntau yog muab rau hauv cov xwm txheej zoo li qub lossis tswj tau dov thiab siv rau cov khoom siv tseem ceeb hauv cov nkoj loj thiab cov chaw tawm ntug dej hiav txwv.

LR AH46 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 raug kuaj xyuas ntawm 0℃thiab muaj qhov tsawg kawg nkaus lub zog ntawm 460 MPa thiab lub zog tensile xws li 570 txog 720 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 19%. 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 suav nrog Nb, V, thiab Ni los txhim kho lub zog thaum tswj kev weldability. Qib no feem ntau yog muab rau hauv cov xwm txheej zoo li qub lossis TMCP thiab yog siv rau cov khoom tseem ceeb hauv cov nkoj loj thiab cov ntug dej hiav txwv.

Ob leeg LR AH42 thiab LR AH46 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 hauv qib siab: AH42 muaj qhov tsawg kawg nkaus lub zog ntawm 420 MPa nrog lub zog tensile ntawm 530-680 MPa, haum rau siab - lub zog hull kev tsim kho, thaum AH46 muab qhov siab tshaj tawm lub zog ntawm 460 MPa nrog tensile lub zog xav tau ntau dua {{10} 570, thauj khoom- cov ntawv thov bearing xav tau lub zog-rau-qhov hnyav 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 kom muaj kev sib txuas zoo rau kev pabcuam marine tseem ceeb, txawm tias AH46 feem ntau yuav tsum tau ua tiav ntau dua kom ua tiav nws cov khoom siv kho kom zoo.

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 AH46 ntxiv muaj zog tshuaj lom neeg muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR AW 46	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 AH46 ntxiv zog muaj zog
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR AW 46	mm	Min Mpa	Mpa	Tsawg%	0	J	J
	t Tsawg dua lossis sib npaug li 50	460	570-720	19%		31	46
	50＜t Tsawg dua lossis sib npaug rau 70	460	570-720	19%		31	46
	70＜t Tsawg dua lossis sib npaug rau 100	460	570-720	19%		31	46
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev