Qhov sib txawv ntawm LR EH50 thiab LR EH55 steel phaj - Kev Paub

LR EH50 thiab LR EH55 yog ultra-siab- lub zog nkoj tsim steel daim hlau uas tau lees paub los ntawm Lloyd's Register (LR). Lub npe "EH" sawv cev rau Ntxiv Siab- lub zog nrog High toughness. Lawv raug tsim los rau cov khoom siv hauv cov nkoj loj, xws li lub lawj sab sauv thiab cov nkoj loj loj, cov dej khov- cov nkoj muaj zog, thiab kev teeb tsa ntawm ntug dej hiav txwv. Cov qib no muab kev sib xyaw tshwj xeeb ntawm lub zog siab, zoo heev qis- qhov kub thiab txias (txog -40℃lossis qis dua), thiab weldability zoo, ua rau kev tsim cov qauv sib dua thiab ua tau zoo dua.

Qhov txawv tseem ceeb:

Thawj qhov txawv yog nyob rau hauv lawv qhov tsawg kawg nkaus yield zog. LR EH50 muaj qhov tsawg kawg nkaus yield zog ntawm 390 MPa (xws li lub zog tensile yam tsawg kawg nkaus ntawm 500 MPa, los yog 50 kgf / mm²). LR EH55 muaj lub zog siab dua ntawm 420 MPa (nrog lub zog tensile yam tsawg kawg nkaus ntawm 550 MPa, lossis 55 kgf / mm²). Qhov no ua rau EH55 qib muaj zog dua, tso cai rau kev txo qhov hnyav ntxiv lossis muaj peev xwm nce ntxiv hauv kev tsim qauv.

Txhawm rau kom ua tiav qhov kev ua kom muaj zog ntxiv no thaum tuav cov kev cai nruj nruj, EH55 feem ntau yuav tsum muaj cov tshuaj ua kom zoo dua qub thiab kev tswj xyuas meej thaum lub sij hawm thermo-kev tswj xyuas tshuab (TMCP). Qhov no ua rau muaj qhov sib npaug ntau dua carbon thiab Pcm tus nqi rau EH55 piv rau EH50. Yog li ntawd, qhov vuam ntawm EH55 tuaj yeem xav tau cov txheej txheem nruj me ntsis hais txog kev ua kom sov ua ntej, kev tswj xyuas qhov kub thiab txias, thiab kev tswj xyuas cov cua sov kom txo tau qhov kev pheej hmoo ntawm hydrogen-induced cracking thiab khaws cov toughness nyob rau hauv weld tshav kub- cuam tshuam cheeb tsam.

Tshuaj muaj pes tsawg leeg

LR EH50 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 50	0.20	0.55	1.70	0.030	0.030	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

LR EH55 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH55	0.20	0.55	1.70	0.030	0.030	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

Mechanical Property

LR EH50 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 50	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t Tsawg dua lossis sib npaug li 50	500	610-770	18%		33	50
	50＜t Tsawg dua lossis sib npaug rau 70	500	610-770	18%		33	50
	70＜t Tsawg dua lossis sib npaug rau 100	500	610-770	18%		33	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR EH55 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH55	mm	Min Mpa	Mpa	Tsawg%	-40	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