Aluminium pas nrig taub qab vuam yog cov txheej txheem siv dav hauv ntau daim ntawv thov kev lag luam, paub txog nws lub peev xwm los tsim kom muaj zog thiab ruaj khov welds. Ib qho tseem ceeb ntawm cov txheej txheem no yog preheating, uas yuav tsum tau nce qhov kub ntawm aluminium rods ua ntej lawv welded ua ke. Hauv tsab xov xwm no, peb yuav tshawb txog qhov tseem ceeb thiab cov txiaj ntsig ntawm preheating nyob rau hauv aluminium pas nrig taub qab vuam tshuab.
1. Txo kev ntxhov siab
Preheating plays lub luag haujlwm tseem ceeb hauv kev txo cov kev ntxhov siab uas tuaj yeem tshwm sim thaum lub sijhawm vuam. Aluminium, zoo li ntau lwm yam hlau, muaj qhov nyiam cog lus thiab nthuav dav raws li nws tau sov thiab txias. Thaum aluminium rods yog rhuab sai thiab welded yam tsis muaj preheating, qhov kub thiab txias sib txawv tuaj yeem tsim nyob rau hauv cov khoom. Qhov cua kub ceev thiab txias no tuaj yeem ua rau muaj kev ntxhov siab sab hauv, uas tuaj yeem ua rau cov vuam tsis muaj zog thiab cov khoom nyob ib puag ncig.
Los ntawm preheating lub txhuas rods, cov kub sib txawv yog txo. Cov txheej txheem cua sov maj mam tso cai rau qhov sib txawv ntawm qhov kub thiab txias dua thoob plaws hauv cov khoom. Raws li qhov tshwm sim, qhov sib koom ua ke ntawm weld thiab cov cheeb tsam ib puag ncig tau txo qis kev ntxhov siab, ua rau muaj zog thiab txhim khu kev qha weld.
2. Kev tiv thaiv kev tawg
Aluminium yog qhov cuam tshuam rau kev tawg thaum lub sijhawm vuam, tshwj xeeb tshaj yog thaum muaj kev hloov pauv kub sai. Preheating pab tiv thaiv kev tsim cov kab nrib pleb los ntawm kev ua kom muaj kev tswj xyuas ntau dua thiab maj mam nce thiab poob. Kev tawg tuaj yeem cuam tshuam qhov kev ncaj ncees ntawm cov vuam thiab txo nws lub zog, ua rau preheating yog ib qho tseem ceeb hauv kev zam qhov tsis xws luag.
3. Txhim kho Weldability
Aluminium pas nrig taub qab vuam tshuab feem ntau ua haujlwm nrog ntau qib thiab thicknesses ntawm txhuas rods. Preheating tuaj yeem txhim kho qhov weldability ntawm cov khoom sib txawv no los ntawm kev ua kom zoo rau cov txheej txheem vuam. Nws tso cai rau cov txhuas kom ncav cuag qhov kub thiab txias qhov twg nws tau txais ntau dua rau cov vuam kub, ua rau kev txhim kho fusion ntawm cov pas nrig.
4. Txo porosity
Preheating kuj tseem tuaj yeem pab txo qhov tsim ntawm cov hnab ris roj lossis cov voids hauv qhov vuam, hu ua porosity. Thaum cov txhuas yog cua sov sai heev, txhua yam gases daig, xws li hydrogen lossis oxygen, yuav khiav tawm ntawm cov khoom, tsim cov voids hauv vuam. Cov voids no tuaj yeem ua rau lub vuam tsis muaj zog thiab cuam tshuam nws qhov zoo. Preheating txo qhov muaj feem ntawm cov pa nkag thiab txhawb kom muaj kev sib txuam ntau dua, cov khoom siv vuam.
5. Txhim kho kev sib koom ua ke
Thaum kawg, lub hom phiaj tseem ceeb ntawm preheating nyob rau hauv aluminium rod taub qab vuam yog tsim kom muaj zog, txhim khu kev qha welds. Los ntawm kev txo qis kev ntxhov siab, tiv thaiv cov kab nrib pleb, txhim kho weldability, thiab txo qhov porosity, preheating pab txhawb rau kev tsim cov pob qij txha nrog cov khoom zoo tshaj plaws. Cov pob qij txha no muaj zog ntxiv, ductility, thiab tiv thaiv tsis ua hauj lwm, kom ntseeg tau tias lawv ua tau raws li qhov yuav tsum tau ua ntawm ntau yam kev lag luam.
Hauv kev xaus, preheating nyob rau hauv txhuas pas nrig taub qab vuam tshuab yog ib qho tseem ceeb kauj ruam uas ho cuam tshuam qhov zoo thiab kev ua tau zoo ntawm cov welds tsim. Nws pab txo kev ntxhov siab, tiv thaiv cov kab nrib pleb, txhim kho weldability, txo porosity, thiab thaum kawg txhim kho kev sib koom ua ke. Incorporating preheating rau hauv cov txheej txheem vuam yog qhov tseem ceeb rau kev ua tiav cov khoom ruaj khov thiab kev cia siab rau aluminium rod welds, ua rau nws muaj txiaj ntsig zoo hauv ntau qhov chaw tsim khoom.
Post lub sij hawm: Sep-06-2023
