Advanced Welding Metallurgy thiab Txheej Txheem
Q1: Dab tsi yog qhov tseem ceeb ntawm P -}}}} Tus lej thiab pab pawg sib faib rau A106b hauv Vuam?
A1:Nyob rau hauv lub asme boiler thiab siab hlab ntsha code, A106B tau muab ibP - Tus lej 1, Pab Pawg 1Cov. Qhov kev faib tawm no yog ib pab pawg ntawm cov ntaub ntawv nrog cov khoom siv weldability thiab cov tshuab siv tshuab. Qhov tseem ceeb yog tias nws tso cai rauCov txheej txheem kev tsim nyoglos ntawm pab pawg. Kev tsim kho cov kev siv nkoj tshwj xeeb (WPS) tsim nyog ntawm ib p - Tsis muaj . 1, gr. Tsis muaj {{4 {}}}, A106b) kuj tsim nyog rau vuam lwm p {8}. 1, gr. Tsis muaj {. 1} cov khoom (piv txwv, SA-53 B), yam tsis muaj kev ntsuam xyuas tshwj xeeb rau txhua qib neeg siv. Cov kab ke no ua kom yooj yim lub vuam cov ntawv sau tseg thiab txo qhov kev coj ua rau fabricate khw ua haujlwm nrog cov hlau ua haujlwm.
Q2: Cov theem microses nyob rau hauv tshav kub -} bein cuam tshuam thaj chaw (Haz) ntawm A106B Weld?
A2:Cov cua sov -} bein cuam tshuam thaj chaw (Haz) ntawm A106B Weld yog ib thaj av ntawm microstrient. Cov theem tam sim no nyob ntawm lub ncov kub hu rau thaum lub sij hawm vuam thiab tus nqi txias tom ntej. Los ntawm cov kab fusion kab sab nraud, thaj chaw yog:1. Lis thaj tsam ntawm thaj chaw:Ze tshaj plaws rau Weld, qhov twg kub tshaj 1100 degree, ua rau muaj kev sib deev ntawm cov cua txias thiab cov hlawsite, muaj feem txo cov tawv nqaij tawv.2. Cov cheeb tsam kho kom huv:Qhov twg kub tau nyob ntawm AC3 thiab 1100, ua rau raug nplua, tawv microstructure ntawm ferrite thiab hlawsite raws li ib txwm ua.3. Ib nrab Kev Hloov Pauv (intercritical):Qhov twg kub tau kub tau nyob nruab nrab ntawm AC1 thiab AC3, uas ua rau muaj kev sib xyaw ntawm kev hloov pauv thiab tsis tau hloov kho thiab tsis tau hloov kho tsis tau.4. Tempered Cheeb Tsam:Qhov twg kub tau kub tau qis dua AC1 tab sis siab txaus kom ua kom siab dua ntawm thawj microstructure.
Q3: Vim li cas hydrogen tswj yog li tseem ceeb thaum vuam A106b, thiab nws ua tiav li cas?
A3:Hydrogen tswj yog qhov tseem ceeb los tiv thaiv hydrogen -}}}), tseem hu ua kev tawg lossis qeeb tawg. Atomic hydrogen tuaj yeem yaj nyob rau hauv Molten Weld hlau thiab diffuse rau hauv lub Haz. Thaum txias txias, nws tuaj yeem ua tau ntawm microstructuralruralrural, lub tsev siab ua rau muaj kev cuam tshuam tawg. Qhov no yog kev pheej hmoo loj rau A106B vim nws cov ntsiab lus carbon. Nws tau tiav los ntawm:1. Qis - hydrogen mroundroid:Siv cov smig electrodes cais yog exx18 (piv txwv li, E7018) thiab khaws cia rau hauv kev tswj hwm ncu.2. Kev nyiam huv:Tshem tawm tag nrho cov dej noo, xeb, pleev xim, thiab roj (ib qhov chaw ntawm hydrogen) los ntawm cov chaw sib koom ua ke.3. Preheating:Qeeb cov neeg txias kom ua rau hydrogen kom diffuse tawm ntawm cov hlau.4. Post {- Weld Kev Kho Tshav Kub (Pwhat):Ntxiv rau kev tshem tawm hydrogen tshem tawm.
Q4: Lub hom phiaj ntawm kev siv hluav taws xob vuam yog dab tsi (WPS) thiab cov ntsiab lus tseem ceeb nws txhais tau li cas rau A106B?
A4:WPS yog cov ntaub ntawv kom ntxaws uas muab cov lus qhia rau cov kws qhia ntawv rau kev ua lub suab Weld. Rau A106B, nws txhais tau txhua qhov tseem ceeb thiab tsis-} Qhov tseem ceeb tshaj, suav nrog:1. Lub hauv paus hlau:A106B (P {- Tsis muaj . 1, gr. Tsis . 1).2. Ua tub yees:Kev faib tawm tshwj xeeb (piv txwv li, ER70s-6 rau GTAW / GMAW, E7018 rau smaw).3. Tiv thaiv cov roj:Hom thiab txaus (piv txwv li, 75% AR / 25% CO2 rau GMAW).4. Hluav taws xob tsis sib xws:Polarity, amperage, voltage, thiab ncig khiav ceev.5. Teheat thiab sib txuam kub:Yam tsawg kawg nkaus uas yuav tsum tau kub.6. Vuam cov txheej txheem:Stringer lossis Weave Bead, tus naj npawb ntawm cov ntaub ntawv hla (PQR) uas ua pov thawj cov txheej txheem tsim cov suab, mechanically txaus welsical.
Q5: Yuav ua li cas txoj kev ncaj ncees ntawm Weld nyob rau hauv-}} Kev pabcuam A106B (cov kais kub) txawv ntawm Weld?
A5:Vuam nyob rau hauv - kev pab cuam yeeb ("Kiav kub") nthuav tawm cov kev sib tw tsis zoo rau WELD:1. Cov nyhuv kub lub dab:Cov txheej txheem ntws nrawm nrawm ntawm tshav Weld, ua kom muaj kev pheej hmoo sai, ua rau muaj kev pheej hmoo sai, ua rau muaj kev sib tsoo hydrogen. Tus WPS yuav tsum siv ntau dua amerperage.2. Hlawv -} los ntawm kev pheej hmoo:ARC yuav tsum tsis txhob nkag rau lub tshuab dej yeeb nkab, uas yog kev ntxhov siab. Qhov no yuav tsum tsis txhob tswj cov tswv yim tshav kub thiab feem ntau yog txwv rau cov thicknesses tshwj xeeb.3. Hydrogen Sesoures:Cov yeeb nkab phab ntsa tsis tuaj yeem yog ua ntej rau tib yam, thiab noo noo ntawm sab nraud sab nraud yog qhov kev txhawj xeeb ntau dua.4. Kev ntxhov siab lub xeev:Weld tau ua rau cov yeeb nkab nias, lub ntsiab lus nws yog kev ntxhov siab thaum lub sij hawm vuam, uas tuaj yeem txhawb kev tawg. Cov txheej txheem tshwj xeeb thiab muaj kev sib tw welders tau xav tau ntau.
