Lub zog ntawm Ob Chav Welded Yeeb Nkab hauv Kev Siv Hauv Kev Lag Luam

Kev Piav Qhia Luv:

Hauv ntiaj teb ntawm cov kav dej kev lag luam, kev xaiv cov khoom siv thiab cov txheej txheem tsim kho tuaj yeem muaj kev cuam tshuam loj rau kev ua haujlwm tag nrho thiab lub neej ntev ntawm lub kaw lus. Ib txoj hauv kev uas nrov rau nws lub zog thiab kev ruaj khov yog siv cov kav dej ob chav vuam. Cov kav dej no tau tsim los kom tiv taus kev kub siab, kub heev thiab cov xwm txheej ib puag ncig hnyav, ua rau lawv zoo tagnrho rau ntau yam kev siv hauv kev lag luam.

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Ob chav welded yeeb nkabraug tsim los ntawm ob txoj kev vuam sib cais los tsim kom muaj kev sib txuas ruaj khov thiab txhim khu kev qha ntawm cov yeeb nkab. Cov txheej txheem vuam ob zaug no ua kom ntseeg tau tias cov yeeb nkab tuaj yeem tiv taus cov kev ntxhov siab thiab kev sib txhuam uas yuav ntsib thaum lub sijhawm ua haujlwm, ua rau nws yog qhov kev xaiv txhim khu kev qha rau cov ntawv thov tseem ceeb uas tsis muaj kev ua tsis tiav.

Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm cov kav dej uas vuam ob zaug yog lawv lub peev xwm los tswj cov chaw muaj kev kub siab. Cov txheej txheem vuam ob zaug tsim kom muaj kev sib txuas zoo thiab muaj zog ntawm cov ntu kav dej, ua kom lawv tuaj yeem tiv taus cov kev kub siab sab hauv yam tsis muaj kev pheej hmoo ntawm kev xau lossis kev ua tsis tiav. Qhov no ua rau lawv zoo tagnrho rau cov ntawv thov xws li cov kav dej roj thiab roj av, qhov twg kev ua tiav ntawm cov kav dej yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua haujlwm zoo.

Rooj 2 Cov Khoom Siv Lub Cev Thiab Tshuaj Lom Zem Tseem Ceeb ntawm Cov Kav Hlau (GB/T3091-2008, GB/T9711-2011 thiab API Spec 5L)
Tus Qauv	Qib Hlau	Cov Tshuaj Cheebtsam (%)						Cov Khoom Siv Tensile						Charpy (V notch) Kev Ntsuas Qhov Cuam Tshuam
		c	Mn	p	s	Si	Lwm yam	Lub zog tawm los (Mpa)		Lub zog tensile (Mpa)		（L0=5.65 √ S0）min Qhov Ncab Ncab (%)
		siab tshaj plaws	siab tshaj plaws	siab tshaj plaws	siab tshaj plaws	siab tshaj plaws	Lwm yam	feeb	siab tshaj plaws	feeb	siab tshaj plaws	D ≤ 168.33 hli	D > 168.3 hli
GB/T3091 -2008	Q215A	≤ 0.15	0.25 ＜ 1.20	0.045	0.050	0.35	Ntxiv NbVTi raws li GB/T1591-94	215		335		15	> 31
	Q215B	≤ 0.15	0.25-0.55	0.045	0.045	0.035		215		335		15	> 31
	Q235A	≤ 0.22	0.30 ＜ 0.65	0.045	0.050	0.035		235		375		15	>26
	Q235B	≤ 0.20	0.30 ≤ 1.80	0.045	0.045	0.035		235		375		15	>26
	Q295A	0.16	0.80-1.50	0.045	0.045	0.55		295		390		13	>23
	Q295B	0.16	0.80-1.50	0.045	0.040	0.55		295		390		13	>23
	Q345A	0.20	1.00-1.60	0.045	0.045	0.55		345		510		13	>21
	Q345B	0.20	1.00-1.60	0.045	0.040	0.55		345		510		13	>21
GB/T9711-2011 (PSL1)	L175	0.21	0.60	0.030	0.030		Xaiv tau ntxiv ib qho ntawm NbVTi cov ntsiab lus lossis ib qho kev sib xyaw ua ke ntawm lawv	175		310		27		Ib lossis ob qho ntawm cov ntsuas kev tawv ntawm lub zog cuam tshuam thiab thaj chaw txiav yuav raug xaiv. Rau L555, saib tus qauv.
	L210	0.22	0.90	0.030	0.030			210		335		25
	L245	0.26	1.20	0.030	0.030			245		415		21
	L290	0.26	1.30	0.030	0.030			290		415		21
	L320	0.26	1.40	0.030	0.030			320		435		20
	L360	0.26	1.40	0.030	0.030			360		460		19
	L390	0.26	1.40	0.030	0.030			390		390		18
	L415	0.26	1.40	0.030	0.030			415		520		17
	L450	0.26	1.45	0.030	0.030			450		535		17
	L485	0.26	1.65	0.030	0.030			485		570		16
API 5L (PSL 1)	A25	0.21	0.60	0.030	0.030		Rau qib B hlau, Nb + V ≤ 0.03%; rau hlau ≥ qib B, xaiv tau ntxiv Nb lossis V lossis lawv cov kev sib xyaw ua ke, thiab Nb + V + Ti ≤ 0.15%	172		310		(L0 = 50.8 hli) yuav tsum tau xam raws li cov qauv hauv qab no: e = 1944 · A0 .2 / U0 .0 A: Thaj chaw ntawm cov qauv hauv mm2 U: Lub zog tensile tsawg kawg nkaus teev nyob rau hauv Mpa		Tsis muaj ib qho lossis ib qho lossis ob qho tib si ntawm lub zog cuam tshuam thiab thaj chaw shearing yog qhov yuav tsum tau ua raws li qhov ntsuas kev tawv.
	A	0.22	0.90	0.030	0.030			207		331
	B	0.26	1.20	0.030	0.030			241		414
	X42	0.26	1.30	0.030	0.030			290		414
	X46	0.26	1.40	0.030	0.030			317		434
	X52	0.26	1.40	0.030	0.030			359		455
	X56	0.26	1.40	0.030	0.030			386		490
	X60	0.26	1.40	0.030	0.030			414		517
	X65	0.26	1.45	0.030	0.030			448		531
	X70	0.26	1.65	0.030	0.030			483		565

Ntxiv rau nws lub zog, cov yeeb nkab vuam ob chav kuj tseem tuaj yeem tiv taus qhov kub thiab txias heev, ua rau nws haum rau ntau yam txheej txheem kev lag luam. Txawm hais tias thauj cov kua kub lossis cov pa roj, lossis ua haujlwm hauv qhov chaw uas muaj qhov kub thiab txias hloov pauv, cov yeeb nkab vuam ob chav tswj nws cov qauv thiab kev ua tau zoo, ua kom ntseeg tau tias kev ua haujlwm txhim khu kev qha txawm tias nyob rau hauv cov xwm txheej nyuaj tshaj plaws.

Tsis tas li ntawd xwb, qhov ruaj khov ntawm cov yeeb nkab ob chav vuam ua rau nws yog qhov kev xaiv pheej yig rau kev siv hauv kev lag luam. Lawv lub peev xwm tiv taus kev hnav, xeb thiab lwm yam kev puas tsuaj txhais tau tias lawv xav tau kev saib xyuas thiab hloov pauv tsawg kawg nkaus, txo cov nqi khiav lag luam thiab lub sijhawm tsis ua haujlwm.

Zuag qhia tag nrho, kev siv cov yeeb nkab vuam ob chav muab ntau yam txiaj ntsig rau kev siv hauv kev lag luam, suav nrog lub zog, kev ruaj khov thiab kev ntseeg tau. Lawv lub peev xwm los tswj kev kub siab, kub heev thiab cov xwm txheej ib puag ncig hnyav ua rau lawv zoo tagnrho rau ntau yam kev lag luam los ntawm roj thiab roj mus rau kev ua tshuaj lom neeg. Nrog nws cov kev ua tau zoo thiab cov ntaub ntawv siv tau ntev, cov yeeb nkab vuam ob chav yog ib qho khoom muaj nqis rau txhua lub tshuab raj xa dej hauv kev lag luam.