Cov Khoom Siv Cov Khoom Siv thiab Metallurgy
Q1: Cov microstructure ntawm A53b Yeeb Nkab thiab nws puas cuam tshuam li cov khoom li cas?
A1: A53b yeeb nkab feem ntau muaj cov ferrite- Pearlite pineting thiab faib cov peev xwm ntau cov khoom siv kho tshuab. Lub Ferrite theem muab kev ductility thiab kev nruj heev, thaum lub hlaws muaj peev xwm ua rau muaj zog thiab hardness. Lis loj, tswj los ntawm kev tsim cov txheej txheem zoo li normalizing, cuam tshuam ob qho tib si muaj zog (hall {{petch kev sib raug zoo) thiab kev nruj. Tsis - nws yog xim hlau suav, xws li sulfide thiab oxides, tuaj yeem ua raws li kev ntxhov siab yog tias muaj ntau dhau. Qhov no microstructure muab tshuav nyiaj li cas, ductility, thiab weldability haum rau ntau cov ntawv thov kev lag luam thaum ua rau cov kev cai tshwj xeeb.
Q2: Cov carbon cov ntsiab lus cuam tshuam rau weldability ntawm A53B yeeb nkab?
A2: Cov ntsiab lus carbon cuam tshuam ntau weldability los ntawm nws cov nyhuv ntawm kev ua haujlwm nyuaj thiab cov roj carbon sib npaug. A53B qhov siab tshaj plaws 0.30% cov ntsiab lus carbon pab kom txwv tsis pub muaj kev tawv tawv thaum tshav kub kub}}} bead cuam tshuam kev tawg. Cov pa roj carbon sib npaug (CE), suav siv IIW lossis PCM cov qauv lossis yuav tsum ua kom zoo dua 0.43% rau weldability tsis muaj preheat. Cov qib siab dua nce qib tab sis yuav tau tswj preheating, thiab kev kho kom sov {}
Q3:: Cov txheej txheem cua sov yuav zoo li cas rau A53B yeeb nkab thiab vim li cas?
A3: A53b cov yeeb nkab yuav ua rau qhov ua tiav (cua sov rau 1600 Degree F taug qab los ntawm huab cua txias thiab ua tiav cov khoom siv tshuab ua kom zoo dua qub. Kev ntxhov siab tau txais kev ntxhov siab ib puag ncig 1100-1250℃f txo cov kev ntxhov siab los ntawm kev tsim lossis vuam. Quenching thiab tempering tsis yog ib qho tab sis yuav siv rau cov khoom tshwj xeeb. Cov kev kho mob txhim kho kev nruj, seem ruaj khov, thiab txo qis kev phom sij los ntxhov siab corrosion. Cov kev kho mob tshwj xeeb yog nyob ntawm kev tsim qauv thiab npaj cov kev pabcuam, nrog cov ntaub ntawv uas yuav tsum tau lees paub kev ua tiav zoo.
Q4: Yuav ua li cas sib txawv sib txawv hauv A53B cov kev qhia tshwj xeeb muaj kev cuam tshuam rau cov khoom?
A4: Kev sib txawv sib txawv hauv kev txwv tshwj xeeb tuaj yeem cuam tshuam cov yam ntxwv. Manganese cov ntsiab lus txog li 1.20% nce ntxiv los ntawm cov tshuaj txuag zog. Residual cov ntsiab lus li tooj liab, npib tsib xee, chromium, thiab molybdenum cuam tshuam rau cov tawv nqaij tawv thiab xeb tsis kam. Cov qib leej txiv phosphorus cuam tshuam nrog kev ua haujlwm kub thiab kev nruj. Cov kev sib txawv no yuav tsum tswj hwm kev ua tib zoo saib xyuas cov kev ua tau zoo ib yam, tshwj xeeb rau kev ua haujlwm zoo ib yam, tshwj xeeb rau cov txheej txheem tsis cuam tshuam thiab ua rau cov khoom siv.
Q5: Dab tsi metallurgical tsis xws luag yog tshwj xeeb rau A53B yeeb nkab ntau lawm?
A5: Cov xwm txheej nquag muaj xws li cov lus Lij Kev kub dhau thaum ua haujlwm tuaj yeem ua rau muaj kev loj hlob ntau dhau, thaum ua tsis tiav yuav ua rau muaj kev tsis tiav recrystallization. Weld cheeb tsam qhov tsis xws luag muaj xws li tsis muaj fusion, porosity, thiab embrittlement los ntawm kev txias txias. Cov tsis xws luag no yog tswj los ntawm kev tsim cov txheej txheem tsim, tsis- kev kuaj mob, thiab kev ua raws li kev ua kom pom tseeb rau kev pabcuam.
