1. Weld Porosity (me me hauv Weld Hlau)
Ua:
Cov khoom paug ntawm cov hlau (roj, roj, roj, xeb, lossis zeb nplai) uas vaporize thaum lub sij hawm vuam thiab tau daig hauv chav weld.
Plep Welding Consumables (piv txwv, E8018-G Electrodes tsis qhuav) tso noo noo thaum ua kom sov.
Kev tiv thaiv tsis txaus (piv txwv li, ua haujlwm tsis raug ntawm ANC ntev, qauv ua haujlwm ib puag ncig) cia cua (oxygen / nitrogen) nkag mus hauv Weld Pas.
Kev tiv thaiv:
Ntxuav lub hauv paus hlau nrog stainless hlau txhuam txhuam + acetone (25mm dav ntawm ob sab ntawm pob qij txha) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom ua ke) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom ua ke) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom tes) kom tshem tawm txhua yam kev sib koom ua ke) kom tshem tawm txhua qhov kev sib txuas.
Cov ntaub ntawv qhuav rau ib lub chaw tsim khoom lag luam (E8018-g feem ntau yuav tsum tau 350℃rau 1-2 teev, khaws cia rau hauv qhov cub rod rased).
Tswj kev luv luv ntawm lub sijhawm ntev (1-1.5 × elec elec elec electrod lub taub) thiab ntaub thaiv npog hauv weld pas dej los ntawm cov ntawv sau nrog cua ntxaij.
2. Cua sov -} cuam tshuam cheeb tsam (haz) softening
Ua:
Cov kev tawm hws ntau dhau (saum toj 35 kJ / cm) lossis high interpass kub (ntau tshaj 250 degree), uas coarsens lub haz microstructure thiab ua rau muaj kev kub ntxhov.
Qeeb txias ntawm cov paib tuab (ntau dua los yog sib npaug rau 30mm) tsis muaj tswg {}} Weld Kev Kho Mob Kub (PWHT) rau refine nplej.
Kev tiv thaiv:
Tswj cov lus tawm thaum tshav kub kub li 15-35 KJ / CM (kho tam sim no / voltage raws li phaj tuab; piv txwv, 3.2mm electrodes siv 120-150A).
Cia kev cuam tshuam qhov kub nyob hauv qis dua 250℃(saib xyuas nrog rab phom kub thaum hla).
For plates >30 hli, siv multi {-}}}}}}}}}}}}}}}}} Cov hlaws me me thiab yog xav tau) kom nrawm dua txias.
3. Weld Corrosion Mismatch (Weld Rustts sai dua li paus hlau)
Ua:
Siv tsis - huab cua cov tshuaj tiv thaiv (piv txwv li, E70S-6) uas tsis muaj SMA570W CU / CL Alloy.
Tshaj -} m tsoo cov weld (tshem tawm cu / s} Cov khoom lag luam qis}}} alneoy sab hauv hlau).
Daim Ntawv Sib Tw / Cov Khoom Taw Qhia Kev thaiv PATINE tsim ntawm Weld.
Kev tiv thaiv:
Siv cov huab cua - qib consumables (E8018 {p rau Gmaw, ENGAW / CR cov ntsiab lus los ntawm cov ntawv pov thawj khoom.
Zam kev sib tsoo tsis tsim nyog; Tsuas yog zom los kho qhov tsis xws luag (siv ntau dua lossis sib npaug nrog 120 grit abrasive los ua kom yooj yim).
Tshem tawm slag / sib yuav tam sim ntawd tom qab vuam nrog cov hlau stainless.
4. Undercut (Grooves Raws Weld sawv)
Ua:
Ntau tam sim no (piv txwv li, 180A rau 3.2mm electrodes) melting ntau ntau lub hauv paus hlau raws Weld ntug.
Tsis yog elects lub kaum sab xis (tuav hluav taws xob dhau ib sab, ncaj qha Arc tshav kub rau lub hauv paus hlau hloov chaw ntawm Weld pas dej).
Ceev ceev kev taug kev ceev tawm qhov tsis txaus ua tub lim hlau los sau tus ntug.
Kev tiv thaiv:
Sib phim tam sim no rau electrode loj (ua raws cov lus qhia chaw lag luam: piv txwv li, 3.2mm E8018-g siv 120-150A).
Tswj ib 20-30℃Electrode lub kaum sab xis (luag lub kaum sab xis rau smaw) kom tsom arc cua sov ntawm lub pas dej weld.
Hloov kho kev ncig mus ncig kom ntseeg tau cov tub rog sib tw puv rau Weld Ntug (tsis muaj qhov muag uas pom).
5. Txias tawg (qeeb tawg hauv weld / haz)
Ua:
Hydrogen cov ntsiab lus nyob rau hauv weld (los ntawm damp electrodes, oily luj cov hlau, lossis huab cua ntub).
Muaj kev ntxhov siab ntau (los ntawm kev ua si kom txias lossis khi khi).
Qus qis hauv lub haz (vim muaj tshav kub ntau dhau los yog cov nplej coarse).
Kev tiv thaiv:
Siv qis - hydrogen electrodes (E8018- g yog cov hydrogen) thiab qhuav lawv kom yog.
Prehe ua nyias cov paib (tsawg dua los yog sib npaug rau 10mm: 50-100 degree; 10-20mm: 100-150 degree) kom qeeb qeeb thiab txo qis kev ntxhov siab.
Perform post-weld heat treatment (PWHT) for thick plates (>20mm): tuav ntawm 550-600℃rau 1-2 teev kom tso cov hydrogen thiab refine nplej.
