1. Yuav tsum muaj kev ntxhov siab rau kev hloov kho tshiab (rau siab- kev ntxhov siab lossis tuab cov khoom)
Muaj feem xyuam:
Welded Cheebtsam nrog phaj tuab> 20mm (tshwj xeeb tshaj yog ntim - girders lossis siab vessel plhaub).
Cov pob qij txha raug kaw rau cov khoom siv tsis sib xws (piv txwv li, cov kev ua yeeb yam) lossis ib puag ncig hnyav (piv txwv li cov ntug dej hiav txwv ceev).
Txheej txheem tsis:
Sov tag nrho welded tivthaiv uniformly rau550-600 degree(zam dhau 620 degree, uas tej zaum yuav txo cov hlau hauv lub zog).
Tuav ntawm qhov kub no rau1-2 teev rau 25mm ntawm phaj tuab(piv txwv li, 4 teev rau 50mm {{}} cov hlau tuab) kom tiav kev ntxhov siab.
Txias maj mam ntawm tus nqi tsawg dua lossis sib npaug rau 50℃/ teev kom txog rau thaum lub zog mus txog 300 degree, ces cia cua txias. Sai sai txias yuav reintrodododu kev ntxhov siab thiab kev pheej hmoo tawg.
2. Post {{{- weld tu: khaws cov kev ua yeeb yaj kiab
Tshem tawm cov khoom seem flux thiab txhais tau:
Siv cov hlau xaim (stainless hlau, tsis yog cov hlau hlau) lossis khau khiab (nrog rau cov hmoov av abrasive, 12}} grit) kom tshem tawm weld ci thiab flux slag. Tsis txhob siv acidic tshuaj ntxuav (piv txwv li, hydrochloric acid) lossis xaim txhuam ua los ntawm cov hlau zoo tib yam-lawv yuav corrode cov hlau thiab paug cov hlau.
Rau qhov nyuaj - rau {{1} {mus txog thaj chaw dhuav (piv txwv li, pH 6) ua raws li los ntawm cov dej ntxhua khaub ncaws.
Zam dhau -} kev sib tsoo:
Tsuas yog zom kom tshem tawm cov teeb meem saum npoo av (piv txwv li, ntiav cov kab nrib pleb lossis ntau dhau lawm), tsis yog rau cov tshuaj pleev ib ce. Tshaj -} Kev sib tsoo cov hlau tshiab yam tsis muaj huab cua hluav taws xob, ua rau cov xeb hauv zos uas cuam tshuam lub patina. Yog tias kev sib tsoo xav tau, siv cov nplua {{5} grit 砂轮 (ntau dua los yog sib sib zog nqus tsawg dua los yog sib sib luag rau 0.5 hli.
3. Yeem Ntxiv Kev Kho Mob (rau cov chaw ib puag ncig heev)
Zinc -} Primer kov -}:
Yog tias weld deg lossis cua sov -} Cov cim ntawm zinc {}}} primer nplua nuj (zinc cov ntsiab lus ntau dua los yog sib npaug rau 90%). Qhov no muab kev tiv thaiv ib ntus mus txog lub ntuj patina, tsis muaj kev sib cuam tshuam cov hlau ntev}} lub sij hawm huab cua ntev.Tsawg - kub tempering (rau cov hlau tuab):
Rau daim hlau> 30mm tuab, ib qho tsawg - kub npau taws (180-220 degree) tom qab kev ntxhov siab yam tsis muaj kev txo lub zog. Qhov no yog qhov tshwj xeeb tshaj yog siv rau cov khoom siv uas siv hauv cov cheeb tsam txias (hauv qab 0 degree).
4. Txwv tsis pub tshaj tawm - Weld kev coj ua
Tsis txhob ua "Kub peening" (Rauj ntawm Weld thaum kub) {}}}} Qhov no tuaj yeem ua kom pom cov microcracks hauv lub patina.
Tsis txhob siv cov xim zoo ib yam (piv txwv li, cov xim alkyd) raws li tus ncej} weld txheej- weld txheej, tiv thaiv kev tsim cov kev tiv thaiv patina. Tsuas yog siv cov huab cua hlau - cov txheej txheej tshwj xeeb (piv txwv li, pob tshab acrylic sealants) yog tias tsim nyog los ntawm kev tsim qauv.
