Qhov txawv ntawm LR AH42 thiab LR AH62 steel phaj - Kev Paub

LR AH42 yog ib qho ntxiv - siab - lub zog shipbuilding steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR). Nws yog ib qho zoo - nplej, weldable structural steel npaj rau marine thiab offshore daim ntaub ntawv. 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 hwm nruj, nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.21% thiab manganese Tsawg dua lossis sib npaug li 1.70%. Cov qib no feem ntau yog muab rau hauv qhov qub, thermo-mechanically tswj dov (TM), lossis quenched thiab tempered (QT) tej yam kev mob .

LR AH62 yog ultra- siab- lub zog marine steel phaj kuj tau lees paub los ntawm Lloyd's Register (LR). Nws muaj qhov tsawg kawg nkaus lub zog ntawm 620 MPa (siab dua AH42) thiab lub zog tensile xws li 720 txog 890 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 17%. Txhawm rau ua tiav nws cov khoom siv zoo tshaj plaws, nws cov tshuaj muaj pes tsawg leeg yog qhov nyuaj, suav nrog cov ntsiab lus qis dua (tsawg dua lossis sib npaug li 0.18%) thiab ntxiv cov microalloying xws li npib tsib xee (0.70-1.80%), chromium (0.40-1.60%), thiab molybdenum (tsawg dua lossis sib npaug li 0.70%). Qib no feem ntau yog xa mus rau hauv cov xwm txheej zoo li qub lossis QT.

Ob leeg LR AH42 thiab LR AH62 yog LR- ntawv pov thawj siab - lub zog marine steels, tsim los rau kev thov kev tsim nkoj thiab kev siv sab nrauv uas xav tau weldability zoo heev thiab lav qhov cuam tshuam toughness ntawm 0 degree. Lawv qhov sib txawv tseem ceeb nyob rau hauv lub zog theem: AH42 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 420 MPa, haum rau ntxiv - siab- lub zog hull siv, thaum AH62 muab qhov siab tshaj qhov qis tshaj tawm lub zog ntawm 620 MPa, ua rau nws zoo tagnrho rau kev thauj khoom tseem ceeb ntau dua -}cov ntaub ntawv muaj zog {1} {1} cov ntaub ntawv muaj zog {1} . Yog li ntawd, AH62 ntiav ib tug complex alloying tsim thiab advanced ua txoj kev piv rau AH42 kom ua tiav nws cov khoom txhim khu kev qha.

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 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 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 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 AH42 thiab LR AH62 steel phaj