Qhov sib txawv ntawm LR DH62 thiab LR DH55 steel phaj - Kev Paub

LR DH62 thiab LR DH55 yog shipbuilding steel qib (LR=Lloyd's Register), sib txawv ntawm lub zog thiab toughness: DH62 muaj zog yield zog ntau dua (nyob ib ncig ntawm 355 MPa) thiab zoo dua qis dua - qhov kub thiab txias cuam tshuam toughness dua DH55 MP2 (ib puag ncig), haum rau 1 1 kev ntxhov siab, thaum DH55 yog qhov dav dav - lub hom phiaj, siab - tensile structural steel rau kev thov tsawg dua. Lub 'D' qhia txog qhov sib sib zog nqus-txias toughness, 'H' txhais tau hais tias siab tensile, thiab cov lej (55, 62) cuam tshuam rau qhov tsawg kawg nkaus yield zog (xws li, 55 ksi / 380 MPa, 62 ksi / 430 MPa), nrog DH62 muaj zog / tawv dua.

Tshuaj muaj pes tsawg leeg

LR DH55 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH55	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 DH62 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH62	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 DH55 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH55	mm	Min Mpa	Mpa	Tsawg%	-20	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

LR DH62 ntxiv cov khoom muaj zog
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH62	mm	Min Mpa	Mpa	Tsawg%	-20	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 DH55 Hlau

Lub zog: Zoo siab tensile zog (Yield ~ 315 MPa / 45 ksi).

Toughness: zoo weldability thiab formability.

Daim ntawv thov: General structural siv nyob rau hauv shipbuilding, hull lug, thiab dav siv.

LR DH62 hlau

Lub zog: siab zog tawm los (Yield ~ 355 MPa / 51 ksi) dua DH55.

Toughness: Superior low-kub qhov toughness (Charpy V-notch).

Daim Ntawv Thov: Cov cheeb tsam uas xav tau lub zog siab dua lossis kev ua haujlwm zoo dua nyob rau hauv cov xwm txheej txias dua, xws li cov ntu tseem ceeb ntawm cov hull.

Cov ntsiab lus tseem ceeb sib txawv

Lub zog: DH62> DH55.

Toughness: DH62> DH55 (tshwj xeeb tshaj yog nyob rau hauv qis temps).

Siv: DH62 rau qhov hnyav dua, qhov chaw txias dua; DH55 rau kev xav tau dav dav