Cov teeb meem uas yuav tshwm sim nyob rau hauv submerged arc vuam cheeb tsam muaj xws li pores, thermal tawg, thiab undercuts.

1. Npuas. Cov npuas feem ntau tshwm sim hauv nruab nrab ntawm qhov vuam. Qhov laj thawj tseem ceeb yog tias hydrogen tseem muab zais rau hauv cov hlau welded hauv daim ntawv ntawm npuas. Yog li ntawd, cov kev ntsuas los tshem tawm qhov tsis xws luag yog thawj zaug tshem tawm xeb, roj, dej, thiab noo noo los ntawm vuam hlau thiab vuam, thiab thib ob, kom qhuav cov flux zoo kom tshem tawm cov dej noo. Tsis tas li ntawd, nce qhov tam sim no, txo qhov vuam ceev, thiab ua kom lub zog ntawm cov hlau molten qeeb kuj zoo heev.

2. Cov kab nrib pleb (kab tawg los ntawm leej faj). Thaum welding daim hlau uas muaj zog sulfur segregation bands (tshwj xeeb tshaj yog mos boiling hlau), sulfides nyob rau hauv sulfur segregation band nkag mus rau hauv weld hlau thiab ua rau tawg. Yog vim li cas yog tias muaj qhov qis melting ntawm hlau sulfide nyob rau hauv sulfur segregation band thiab hydrogen nyob rau hauv cov hlau. Yog li ntawd, txhawm rau tiv thaiv qhov xwm txheej no los ntawm qhov tshwm sim, nws yog qhov zoo los siv cov hlau semi-tua lossis tua hlau nrog tsawg dua sulfur segregation bands. Thib ob, kev ntxuav thiab ziab qhov chaw vuam thiab flux kuj tseem tsim nyog.

3. Kub tawg. Nyob rau hauv submerged arc vuam, thermal tawg tuaj yeem tshwm sim hauv qhov vuam, tshwj xeeb tshaj yog nyob rau hauv arc pits ntawm qhov pib thiab qhov kawg ntawm lub arc. Txhawm rau tshem tawm cov kab nrib pleb zoo li no, cov ntaub qhwv feem ntau yog ntsia rau ntawm qhov pib thiab qhov kawg ntawm lub arc, thiab thaum kawg ntawm lub phaj coil vuam, cov kauv welded yeeb nkab tuaj yeem thim rov qab thiab welded rau hauv qhov sib tshooj. Cov kab nrib pleb yog ib qho yooj yim tshwm sim thaum qhov kev ntxhov siab ntawm cov vuam loj heev los yog cov hlau weld siab heev.

4. Slag suav nrog. Slag suav nrog txhais tau hais tias ib feem ntawm cov slag tseem nyob hauv cov hlau weld.

5. Kev nkag mus tsis zoo. Qhov sib tshooj ntawm cov hlau sab hauv thiab sab nraud tsis txaus, thiab qee zaum nws tsis welded los ntawm. Qhov xwm txheej no hu ua kev nkag mus tsis txaus.

6. Txom nyem. Undercut yog V-shaped zawj rau ntawm ntug ntawm lub vuam raws li qhov nruab nrab ntawm cov vuam. Undercut yog tshwm sim los ntawm qhov tsis tsim nyog xws li vuam ceev, tam sim no, thiab voltage. Ntawm lawv, qhov vuam ceev heev yuav ua rau muaj kev cuam tshuam tsis zoo tshaj qhov tsis tsim nyog tam sim no.