Qhov txawv ntawm LR AH40 thiab LR AH62 steel phaj - Kev Paub

LR AH40 yog lub siab - lub zog shipbuilding steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR). Qib "A" txhais tau hais tias nws raug kuaj xyuas ntawm 0 degree, kom ntseeg tau tias muaj kev ntseeg siab rau cov dej hiav txwv dav dav. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 390 MPa thiab tensile lub zog ntawm 510 txog 650 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 20%. 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 cov qauv hull, decks, thiab offshore platforms xav tau qhov sib npaug zoo ntawm lub zog thiab weldability.

LR AH62 yog ib qho ultra- siab- lub zog marine steel phaj kuj tau lees paub los ntawm Lloyd's Register (LR), tsim los rau kev thov cov qauv siv. Nws raug kuaj xyuas ntawm 0℃thiab muaj qhov tsawg kawg nkaus lub zog ntawm 440 MPa thiab lub zog tensile xws li 620 txog 800 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 19%. Cov tshuaj muaj pes tsawg leeg yog complex tshaj AH40, featuring carbon Less tshaj los yog sib npaug zos rau 0.21%, manganese Tsawg dua los yog sib npaug rau 1.70%, thiab ntxiv alloying ntsiab xws li npib tsib xee (0.70-1.80%), chromium (0.40{18}}1.60%), thiab molybdenum 7% sib npaug zog (1.60%) . Qib no yog xa mus rau hauv cov xwm txheej zoo li qub lossis quenched thiab tempered (QT) thiab yog siv rau cov khoom tseem ceeb hauv cov nkoj loj thiab cov qauv sab nrauv uas xav tau qhov siab tshaj plaws ntawm qhov hnyav-rau-qhov hnyav.

Ob leeg LR AH40 thiab LR AH62 yog LR- ntawv pov thawj siab - lub zog marine steels nrog 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: AH40 muaj qhov tsawg kawg nkaus lub zog ntawm 390 MPa nrog tensile lub zog ntawm 510-650 MPa, haum rau dav dav - lub zog hull kev tsim kho thiab offshore platforms, thaum AH62 muab ib tug ntau npaum li cas ntawm qhov tsawg kawg nkaus yield zog ntawm 440 MPa {1 tensile zog 440}000 MPa, tsim los rau kev xav tau ntau dua load-cov ntaub ntawv cov kabmob uas xav tau lub zog-rau-hnyav piv piv. Ob qib tshwj xeeb tswj cov tshuaj lom neeg muaj pes tsawg leeg thiab tswj kom zoo weldability rau qhov tseem ceeb marine kev pab cuam, tab sis AH62 yuav tsum tau complex alloying thiab advanced ua xws li quenching thiab tempering kom ua tiav nws cov khoom kho kom zoo.

Tshuaj muaj pes tsawg leeg

LR AH40 siab zog tshuaj muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR AW 40	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 AH62 ntxiv zog muaj zog tshuaj lom neeg muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR AH 62	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 AH40 siab zog khoom
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR AW 40	mm	Min Mpa	Mpa	Tsawg%	0	J	J
	t Tsawg dua lossis sib npaug li 50	390	510-650	20%		26	39
	50＜t Tsawg dua lossis sib npaug rau 70	390	510-650	20%		31	46
	70＜t Tsawg dua lossis sib npaug rau 100	390	510-650	20%		37	55
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR AH62 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR AH 62	mm	Min Mpa	Mpa	Tsawg%	0	J	J
	t Tsawg dua lossis sib npaug li 50	620	720-890	17%		41	62
	50＜t Tsawg dua lossis sib npaug rau 70	620	720-890	17%		41	62
	70＜t Tsawg dua lossis sib npaug rau 100	620	720-890	17%		41	62
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

Qhov sib txawv ntawm LR AH40 thiab LR AH62 steel phaj