Nws yog ib qho ntawm cov welded carbon steel kav kom muaj cua npuas nyob rau hauv weld, tshwj xeeb tshaj yog loj-diameter carbon seamless steel yeeb nkab weld pores tsis tsuas yog cuam tshuam qhov nruj ntawm cov yeeb nkab weld thiab ua rau cov kav xa dej, tab sis kuj yog qhov induction ntawm corrosion, uas. tiag txo lub zog thiab toughness ntawm weld. . Cov yam ntxwv uas ua rau porosity nyob rau hauv lub vuam yog: ya raws, av, oxide nplai thiab hlau filings nyob rau hauv lub flux, vuam Cheebtsam thiab npog thickness, nto zoo ntawm steel phaj thiab kev kho mob ntawm steel phaj sab phaj, vuam txheej txheem thiab steel yeeb nkab. txheej txheem txheej txheem, thiab lwm yam Flux muaj pes tsawg leeg. Thaum vuam muaj qhov tsim nyog ntawm CaF2 thiab SiO2, nws yuav hnov ​​​​mob thiab nqus tau ntau H2, thiab tsim HF nrog kev ruaj ntseg siab thiab insoluble hauv cov kua hlau, uas tuaj yeem tiv thaiv kev tsim ntawm hydrogen pores.

Cov npuas feem ntau tshwm sim hauv nruab nrab ntawm cov hlaws dai. Qhov laj thawj tseem ceeb yog tias hydrogen tseem muab zais hauv cov hlau welded hauv daim ntawv ntawm npuas. Yog li ntawd, kev ntsuas kom tshem tawm qhov tsis xws luag yog thawj zaug tshem tawm xeb, roj, noo noo thiab noo noo los ntawm vuam hlau thiab vuam. thiab lwm yam tshuaj, ua raws li cov flux yuav tsum tau zoo qhuav kom tshem tawm cov dej noo. Tsis tas li ntawd, nws kuj tseem siv tau los ua kom lub zog tam sim no, txo qhov vuam ceev, thiab ua kom lub zog ntawm cov hlau molten qeeb.

Lub thickness ntawm cov flux feem ntau yog 25-45mm. Qhov siab tshaj plaws particle loj ntawm cov flux thiab qhov ntom me me raug coj los ua tus nqi siab tshaj plaws, txwv tsis pub siv tus nqi tsawg kawg nkaus; qhov siab tshaj plaws tam sim no thiab tsis tshua muaj vuam ceev yog siv rau qhov sib txuam tuab, thiab qhov tsawg kawg nkaus tus nqi yog siv rau qhov tsis sib xws. Thaum cov av noo siab, cov flux zoo yuav tsum tau qhuav ua ntej siv. Sulfur cracking (kev tawg los ntawm leej faj). Cov kab nrib pleb tshwm sim los ntawm sulfides nyob rau hauv sulfur segregation band nkag mus rau hauv lub vuam hlau thaum vuam daim hlau uas muaj zog sulfur segregation bands (tshwj xeeb tshaj yog mos-boiling hlau). Yog vim li cas rau qhov no yog lub xub ntiag ntawm hydrogen nyob rau hauv hlau sulfide thiab hlau nrog ib tug tsawg melting point nyob rau hauv lub sulfur segregation cheeb tsam. Yog li ntawd, txhawm rau tiv thaiv qhov no tshwm sim, nws kuj tseem siv tau los siv cov hlau semi-tua lossis tua cov hlau uas muaj cov sulfur-muaj cov kab sib cais tsawg dua.