Qhov txawv ntawm LR AH62 thiab LR AH69 steel phaj - Kev Paub

LR AH62 yog ib qho ultra-siab- lub zog marine steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR) rau kev thov kev tsim nkoj thiab kev siv sab nrauv. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 620 MPa thiab tensile lub zog ntawm 720 txog 890 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 17%. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.21%, manganese Tsawg dua lossis sib npaug li 1.70%, thiab ntxiv cov ntsiab lus alloying suav nrog npib tsib xee (0.70-1.80%), chromium (0.40-1.60%), thiab molybdenum (tsawg dua lossis sib npaug li 0.70%) kom ua tiav cov khoom siv zoo tshaj plaws. Impact toughness yog kuaj ntawm 0 degree, yuav tsum tau yam tsawg kawg nkaus 41J (transverse) thiab 62J (ntev). Qib no yog xa mus rau hauv cov xwm txheej zoo li qub lossis quenched thiab tempered (QT).

LR AH69 yog ib qho ultra- siab- lub zog marine steel phaj kuj tau lees paub los ntawm Lloyd's Register (LR), tsim los rau cov kev xav tau tshaj plaws ntawm cov qauv siv. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 690 MPa thiab tensile lub zog ntawm 770 txog 940 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 16%. 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, V, Ti, Cr, Ni, thiab Mo. Impact toughness yog kuaj ntawm -60 degree, yuav tsum tau yam tsawg kawg nkaus 46J (transverse) thiab 69J (ntev). Qib no yog xa mus rau hauv qhov qub, quenched thiab tempered (QT), lossis TMCP cov xwm txheej.

Ob leeg LR AH62 thiab LR AH69 yog LR- ntawv pov thawj ultra- siab- lub zog marine steels tsim los rau kev thov kev tsim nkoj thiab kev siv sab nrauv. Lawv qhov sib txawv tseem ceeb yog nyob rau theem siab zog thiab qis- qhov kub thiab txias: AH62 muaj qhov ua tau zoo ntawm 620 MPa nrog rau kev ntsuas kev cuam tshuam ntawm 0 degree, haum rau cov khoom siv hluav taws xob hnyav uas xav tau lub zog siab - rau- qhov hnyav piv, thaum AH69 muab lub zog ntau dua nrog qhov tsawg kawg nkaus ntawm 6 y. qis-kub toughness sim ntawm -60 degree, tsim los rau cov kev xav tau tshaj plaws load-bearing daim ntaub ntawv nyob rau hauv huab ib puag ncig xws li Arctic offshore platforms . Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg thiab yuav tsum tau ua tiav zoo li QT lossis TMCP kom ua tiav lawv cov khoom siv kho kom zoo thaum tuav cov khoom zoo rau kev pabcuam marine.

Tshuaj muaj pes tsawg leeg

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

LR AH69 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
SIB AH69	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 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

LR AH69 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
SIB AH69	mm	Min Mpa	Mpa	Tsawg%	0	J	J
	t Tsawg dua lossis sib npaug li 50	690	770-940	16%		46	69
	50＜t Tsawg dua lossis sib npaug rau 70	690	770-940	16%		46	69
	70＜t Tsawg dua lossis sib npaug rau 100	690	770-940	16%		46	69
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

Qhov sib txawv ntawm LR AH62 thiab LR AH69 steel phaj