Qhov sib txawv ntawm LR AH36 thiab LR AH55 steel phaj - Kev Paub

LR AH36 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 355 MPa thiab tensile lub zog ntawm 490 txog 620 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 21%. 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%. Qib no yog siv dav rau cov qauv hull, decks, thiab offshore platforms uas yuav tsum muaj qhov sib npaug zoo ntawm lub zog thiab weldability.

LR AH55 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 raug kuaj xyuas ntawm 0℃thiab muaj qhov tsawg kawg nkaus lub zog ntawm 550 MPa thiab lub zog tensile xws li 670 txog 830 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 18%. 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 Cr, Ni, thiab Cu kom ua tiav lub zog siab dua thaum tuav cov weldability zoo. Cov qib no feem ntau yog muab rau hauv quenched thiab tempered (QT) lossis TMCP cov xwm txheej thiab yog siv rau cov khoom tseem ceeb hauv ultra- cov nkoj loj, cov ntug dej hiav txwv, thiab dej khov- cov nkoj muaj zog.

Ob leeg LR AH36 thiab LR AH55 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: AH36 muaj qhov tsawg kawg nkaus lub zog ntawm 355 MPa nrog tensile lub zog ntawm 490-620 MPa, haum rau dav dav - lub zog hull kev tsim kho, thaum AH55 muab qhov siab tshaj qhov tsawg kawg nkaus lub zog ntawm 550 MPa nrog tensile lub zog feem ntau ntawm 550 MPa, 470 10 { xav tau kev thauj khoom-cov ntaub ntawv bearing yuav tsum muaj zog-rau-hnyav piv piv. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg thiab tswj kom muaj kev sib txuas zoo rau cov kev pabcuam tseem ceeb hauv hiav txwv, txawm hais tias AH55 yuav tsum muaj kev sib xyaw ua ke ntau dua thiab ua tiav qib siab xws li quenching thiab tempering kom ua tiav nws cov khoom siv kho kom zoo.

Tshuaj muaj pes tsawg leeg

LR AH36 siab zog tshuaj muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR AH 36	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 AH55 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR AW 55	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 AH36 siab zog khoom
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR AH 36	mm	Min Mpa	Mpa	Tsawg%	0	J	J
	t Tsawg dua lossis sib npaug li 50	355	490-630	21%		24	34
	50＜t Tsawg dua lossis sib npaug rau 70	355	490-630	21%		27	41
	70＜t Tsawg dua lossis sib npaug rau 100	355	490-630	21%		34	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR AH55 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR AW 55	mm	Min Mpa	Mpa	Tsawg%	0	J	J
	t Tsawg dua lossis sib npaug li 50	550	670-830	18%		37	55
	50＜t Tsawg dua lossis sib npaug rau 70	550	670-830	18%		37	55
	70＜t Tsawg dua lossis sib npaug rau 100	550	670-830	18%		37	55
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev