Cov txheej txheem ntau lawm ntawm kauv welded kav rau cov kav dej yog qhov yooj yim, nrog kev ua haujlwm siab thiab cov nqi tsim khoom tsawg. Yog li ntawd, kauv steel kav tau tsim nyob rau hauv ntau lub lag luam. Yog li, peb yuav tsum ua li cas nrog kev ua haujlwm vuam thaum siv cov kav hlau kav?
Ua ntej siv kauv steel kav, deoxidizer yuav tsum tau siv rau deoxidation kom txo tau qhov ntau thiab qhov loj ntawm impurities thaum ua haujlwm. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov kav hlau kav tau ncaj qha mus rau hauv cov kav hlau los ntawm cov hlau ntev ntev ntawm ib qho kev qhia tshwj xeeb los ntawm kev siv vuam ntau zaus.
Cov duab ntawm cov yeeb nkab steel tuaj yeem yog puag ncig lossis square. Kev siv vuam ntau zaus ntawm cov kav hlau kav yog ua raws li cov hauv paus ntsiab lus ntawm electromagnetic induction thiab eddy tam sim no cua sov nyhuv ntawm alternating nqi nyob rau hauv conductors, uas heats cov npoo ntawm weld seam mus rau lub molten lub xeev. Thaum lub sij hawm vuam, vim tias cov zis tam sim no raug cuam tshuam, nws yog ib qho tsim nyog rau kev tsim kev pab cuam lub neej ntawm magnesium alloy anodes kom phim lub neej kev pab cuam ntawm cov kav dej.
Nyob rau hauv zus tau tej cov kauv welded kav, stability ntawm txoj kev yog ze ze rau vuam zoo. Tsuas yog los ntawm kev txhim kho qhov zoo ntawm kev sib sau tuaj yeem ua qhov vuam zoo tuaj yeem lav tag nrho. Txhawm rau kom muaj qhov zoo nkauj thiab txaus nkag mus rau qhov tob ntawm qhov vuam seam hauv cov kav hlau kav, qhov sib txawv ntawm cov hlau phaj rau pob tw vuam yuav tsum tsis sib xws. Meanwhile, sib txawv vuam specifications yuav tsum tau saws raws li sib txawv pob tw vuam sib txawv.
Nyob rau hauv kauv welded kav, lub unevenness ntawm txoj kev seam sib txawv tshwm sim los ntawm lub crescent khoov thiab "S" khoov ntawm cov hlau sawb poses nyuaj rau welding, ua rau tsis ruaj tsis khov weld nkag qhov tob thiab variations nyob rau hauv weld reinforcement qhov siab. Thaum txoj kev sib sau ua ke yog xoob, qhov tob tob ntawm qhov vuam yog qhov loj thiab qhov qhov siab qhov siab txo qis; Thaum txoj kev sib sau ua ke yog nruj, qhov sib nqus nkag qhov tob yog me me thiab qhov kev txhawb nqa qhov siab nce. Yog li ntawd, thaum lub sij hawm welding, kev daws teeb meem rau qhov teeb meem no yog txo cov vuam specifications thaum lub sib sau seam yog xoob thiab ua rau kom lawv thaum lub sib sau seam yog nruj.
Txoj kev tiv thaiv corrosion rau kauv welded kav siv nyob rau hauv cov kav dej kuj pib los ntawm inhibiting ib qho ntawm cov txheej txheem. Kev siv sacrificial anode tiv thaiv, uas txuas cov khoom siv hlau uas muaj peev xwm tsis zoo dua li cov kav hlau kav mus rau cov kav hlau kav, yuav tsis ua rau cov teeb meem zoo li no. Yog li ntawd, cov kav dej xa hluav taws xob hauv nroog yuav tsum tau txais kev sib xyaw ua ke ntawm cov txheej txheem tiv thaiv corrosion thiab kev tiv thaiv kev txi anode. Rau lwm cov kav dej uas tsis yog lub cev nrog lub siab qis, cov txheej txheem anticorrosive feem ntau yog siv ncaj qha.
Tam sim no, feem ntau siv cov txheej txheem sab nraud rau cov kav xa hluav taws xob faus feem ntau suav nrog tsib hom: peb txheej PE cov qauv, epoxy resin hmoov (FBE), thee tar enamel, epoxy coal tar pitch, thiab PE daim kab xev. Cov txheej txheem no tsis ua rau khib nyiab lossis nce nqi kho. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias thaum cov av tiv taus siab dhau los yog cov kav dej tiv thaiv hla cov cheeb tsam dej, kev tiv thaiv kev txi anode tsis haum. Cov txheej txheem anticorrosion sib txawv muaj qhov sib txawv ntawm kev tiv thaiv corrosion zoo thiab cov nqi. Kev txiav txim siab yuav tsum tau muab rau cov txheej txheem tiv thaiv corrosion thiab cov nqi raws li qhov sib txawv, kev siv, ib puag ncig, thiab thauj cov pa roj carbon monoxide ntawm cov kav dej tiv thaiv kauv hlau.
