1. Lo lus nug: Dab tsi tshwj xeeb ntawm cov khoom siv welding (electrodes/wires) yuav tsum raug xaiv raws li "kev sib tw hauv paus ntsiab lus" rau vuam Q460 yeeb nkab?
Teb: Lub hauv paus ntsiab lus sib piv dictates tias lub vuam hlau lub zog yuav tsum zoo ib yam li, tab sis tsis ntau tshaj, lub hauv paus hlau qhov tsawg kawg nkaus lub zog. Rau Q460, uas muaj qhov tsawg kawg nkaus tawm lub zog ntawm 460 MPa, ib tug yuav tsum xaiv ib tug muab tub lim hlau nrog ib tug yield zog ntawm kwv yees li 490 -590 MPa (xws li, E55 los yog E60 series electrodes). Ib qho kev sib tw yog ER55-G lossis E55xx-NiMo hom hlau rau roj hlau arc vuam. Nws yog ib qho tseem ceeb kom tsis txhob siv cov hlau tsis muaj zog (tsis muaj zog) muab tub lim, vim qhov no yuav tsim kom muaj qhov tsis muaj zog, lossis cov hlau tsis muaj zog, uas tuaj yeem ua rau tawg hauv HAZ vim nws lub zog siab heev thiab tsis muaj ductility.
2. Lo lus nug: Nyob rau hauv cov ntsiab lus ntawm GB / T 8163 tus qauv rau seamless steel raj, vim li cas Q390, Q420, thiab Q460 qib tau raug kho kom haum rau GB / T 1591 tshiab?
Teb: GB / T 8163 tus qauv rau "Seamless steel raj rau kev pabcuam ua kua" tau raug kho kom haum raws li qhov tseeb GB / T 1591 "High lub zog qis alloy qauv steels." Cov qub version ntawm GB / T 8163 muaj qhov tsis sib xws, xws li qhia tias "tso tawm lub zog" thaum lub GB / T 1591 tshiab siv "lub zog tawm los sab saud." Nws kuj tseem tsis muaj qib Q355 tshiab (uas hloov Q345). Los ntawm kev hloov kho cov lus qhia tshwj xeeb rau Q390, Q420, thiab Q460 kom phim GB / T 1591, tus qauv ua kom zoo sib xws hauv cov tshuaj lom neeg muaj pes tsawg leeg, cov pa roj carbon sib npaug, thiab cov cuab yeej ntsuas cov cuab yeej thoob plaws tag nrho cov khoom siv hauv Suav teb, yooj yim tsim thiab kev yuav khoom.
3. Lo lus nug: Yuav ua li cas elongation yuav tsum tau (ib qho kev ntsuas ntawm ductility) rau welded yeeb nkab feem ntau piv ntawm Q390 thiab Q460?
Teb: Raws li lub zog nce, ductility feem ntau txo. Yog li, Q460 yuav muaj qhov qis qis qis qis qis qis qis tom qab tawg piv rau Q390. Piv txwv li, nyob rau hauv tus qauv tensile xeem, Q390 yuav xav tau qhov tsawg kawg nkaus elongation ntawm 20-22%, thaum Q460 yuav xav tau tsuas yog 17-18%. Qhov no yog kev sib raug zoo; lub zog siab dua ntawm Q460 los ntawm tus nqi ntawm kev txo lub peev xwm deform plastically ua ntej fracturing. Cov kws kho tsheb yuav tsum xav txog qhov no thaum tsim cov qauv uas yuav tsum muaj peev xwm deformation tseem ceeb, xws li hauv thaj chaw seismic.
4. Nqe Lus Nug: Dab tsi yog cov teeb meem tshwj xeeb hauv kev tsim Q460 rau hauv cov yeeb nkab welded piv rau Q390, thiab qhov no puas cuam tshuam rau cov txheej txheem tsim khoom?
Teb: Lub zog tawm los ntau dua ntawm Q460 (460 MPa vs . 390 MPa) ua rau nws nyuaj rau txias dua - daim ntawv. Cov yeeb nkab- tsim zeb yuav tsum muaj cov tonnage ntau dua thiab muaj zog ntau dua los khoov cov hlau los yog phaj rau hauv cov duab cylindrical. Tsis tas li ntawd, Q460 muaj qhov rov qab siab dua, txhais tau tias nws yuav sim rov qab mus rau nws cov duab tiaj tus ntau dua Q390. Qhov no yuav tsum tau tshaj - ua cov hlau kom ua tiav qhov kawg xav tau txoj kab uas hla. Cov kev ntxhov siab uas tshwm sim los ntawm qhov kev ua nruj ua tsiv no kuj tseem siab dua, uas qee zaum tuaj yeem cuam tshuam rau cov khoom siv kho tshuab kawg thiab yuav tsum tau ceev faj txog kev ntxhov siab ntau dua -txo cov txheej txheem tom qab vuam.
5. Nqe Lus Nug: Rau cov yeeb nkab welded siv nyob rau hauv qis - qhov kub thiab txias ntawm Arctic pipeline daim ntawv thov, qib twg thiab qib zoo yuav yog qhov kev xaiv zoo tshaj plaws ntawm Q390, Q420, thiab Q460?
Teb: Rau daim ntawv thov Arctic qhov kub tuaj yeem poob mus rau -40℃lossis qis dua, qhov kev xav tau tseem ceeb yog qhov tsis tshua muaj siab heev - qhov kub thiab txias cuam tshuam toughness. Ntawm peb, ib qho twg tuaj yeem siv tau, tab sis lawv yuav tsum tau teev nrog 'E' qib zoo, uas lav qhov cuam tshuam tsawg kawg nkaus ntawm -40 degree. Thaum Q390E thiab Q420E tuaj yeem siv tau, yog tias muaj lub zog siab kuj tseem xav tau los txo cov yeeb nkab phab ntsa tuab kom txuag tau qhov hnyav, Q460E yuav yog qhov kev xaiv zoo tshaj. Lub chaw ntau pob "Bird's Zes" nto moo siv Q460E, ua kom pom nws lub peev xwm rau qhov xav tau qhov kub thiab txias.
