Qhov txawv ntawm LR AH40 thiab LR AH42 steel phaj - Kev Paub

LR AH40 yog lub siab -lub zog nkoj tsim 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 zog txaus 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 muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.18% thiab manganese 0.90-1.60%, nrog rau microalloying ntsiab xws li Nb thiab V. Qib no feem ntau yog muab nkag rau hauv qhov qub lossis tswj tau qhov dov thiab yog siv dav rau cov qauv ntawm lub nkoj thiab cov ntug dej hiav txwv.

LR AH42 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 cov qauv siv ntau dua. Nws raug kuaj xyuas ntawm 0℃thiab muaj qhov tsawg kawg nkaus lub zog ntawm 420 MPa thiab lub zog tensile xws li 530 txog 680 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 20%. 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 feem ntau yog muab rau hauv qhov qub lossis tswj tau dov thiab siv rau cov khoom tseem ceeb hauv cov nkoj loj thiab cov chaw tawm sab nraud.

Ob leeg LR AH40 thiab LR AH42 yog LR- ntawv pov thawj 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: 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, thaum AH42 muab qhov siab tshaj tawm lub zog ntawm 420 MPa nrog tensile lub zog xav tau ntau tshaj 50000000000000000 thauj khoom- cov ntawv thov bearing yuav tsum muaj 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 0.18-0.21% thiab tswj kom muaj kev sib txuas zoo rau kev pabcuam hauv hiav txwv tseem ceeb, txawm tias AH42 feem ntau yuav tsum tau ua tiav ntau dua kom ua tiav nws cov khoom siv kho kom zoo. Qhov kev xaiv ntawm lawv nyob ntawm seb qhov project xav tau lub zog sib npaug ntawm AH40 lossis qhov kev ua tau zoo ntawm AH42 rau kev xav tau ntau yam qauv.

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 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

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 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

Qhov sib txawv ntawm LR AH40 thiab LR AH42 steel phaj