Dab tsi yog cov txheej txheem vuam rau galvanized lub raj raj?
Cov vuam vuam rau galvanized lub raj kav dej yuav tsum tau xaiv raws li saum toj zinc txheej ntaub tuab, thiab cov phiaj xwm yooj yim {{bearing} cov xeeb ntxwv, sab nraud / sab nraud). Cov hom phiaj tseem ceeb yog kom txo qis zinc fum txaus ntshai, tsis txhob weld tsis xws luag (porosity, zinc embrittlement), thiab xyuas kom meej tias kev tiv thaiv corrosion.
Ii. Cov ntsiab lus tseem ceeb rau txhua tus txheej txheem (tshwj xeeb rau cov yam ntxwv ntawm Galvanized Txheej)
Tsis hais tus txheej txheem xaiv, "kho cov txheej txheej zinc," "} {{} weld corrosion tiv thaiv" yog cov ntsiab lus sib txawv, tab sis cov ntsiab lus ua haujlwm sib txawv sib txawv ntawm cov txheej txheem:
1. Arc Vuam (Kev Tuav Vuam): Haum rau tuab- walled, thauj - bearing bearing pipes.
Vuam Qws xaiv: anti {- porosity, tsawg} hydrogen cov hluav taws xob yog nyiam kom tsis txhob muaj qhov tsis xws luag los ntawm zinc vapor. Hom siv ntau heev:
Cov roj carbon steel galvanized cov yeeb nkab: E4303 (acidic elide, yooj yim rau kev tsis yog {1} {belter {2 {2 2}} belks}}} belks} Cov ntaub ntawv thov);
Load - cov kabmob qauv qauv / tsawg {}} hydrogen electrode, yuav tsum tau kom qhuav kom txo hydrogen embrittlement nyob rau hauv weld).
Zinc Tu: Siv lub kaum ntse ntse los zom cov weld seam (10 -} 15mm ib sab) kom tiav cov txheej zinc). (Rau tuab kub - dip galvanized txheej, zom kom txog thaum cov hlau tsis txaus ntseeg.) Qhov no tiv thaiv zinc evaporation thiab kev tsim ntawm pores.
Parameter tswj: Siv ib qho qis qis tam sim no, luv luv arc. Piv txwv li, rau vuam ib tug yeeb nkab tuab, siv tam sim no ntawm 90-120A thiab ib qho ntev ntev dua lossis sib npaug ntawm 1/2 tus rod hla. Zam kev zam dhau kev zam dhau los ntawm kev ua kom sov siab.
Welding Technique: Siv "tawg arc vuam" (paiter rau txias tom qab txhua 10 {}} 15mm Weld kom txo qis zinc vapor perpectulation. Tswj 45℃- 60 Degree Rod Lub kaum ntse
Vuam hlau thiab roj av:
Vuam hlau: xaiv er50 - 6 (qhov qis} Cov hlau xaim hlau uas muaj si thiab mn rau deoxidize thiab txo porosity). Lub cheeb yuav tsum tau xaiv raws li phab ntsa tuab: 0.8mm rau nyias {}}} Cov kav dej phab ntsa (2-4mm).
Cov roj: Nyiam yog ib qho sib xyaw ar + Co. sib xyaw (xws li 80% ar {4 4}}%? Qhov no txo tau los ntawm ntau dua 50% piv rau cov ntshiab sib koom thiab muab cov nyhuv uas ruaj khov ntau dua. (Ntshiab Coon tsuas yog tsim nyog rau kev siv sab nraum zoov nrog cov cua daj cua dub.)
Parameter tswj: Tus yuam sij yog "Tsis tau tam sim no, nrawm vuam ceev." Piv txwv li, rau vuam 2 hli tuab yeeb nkab: Siv qhov tam sim no ntawm 80-1AA, ib qho hluav taws xob ntawm 18-40cm / min. Qhov no zam dhau tshav kub ntau dhau uas yuav ua rau cov yeeb nkab deformation lossis zinc embrittlement. Cov lus qhia txog kev ua haujlwm: Ua kom muaj vuam taws teeb ntawm 15-15mm (ib lub xaim hluav taws xob txuas ntxiv tuaj yeem hlawv cov hlau, thaum ib tus xaim hluav taws xob tuaj yeem tiv thaiv tsis txaus siab). Ib qho kev sib tw 0.5-1mm yuav tsum tau sab laug rau cov pob liab pob qij txha kom tiv thaiv tsis tiav.
3. Tig Vuam: Haum rau nyias-}} walled, siab- precision vuam.
Tungsten Electrode thiab Roj:
Tungsten Electrode: Xaiv lub cerium tungsten electrode (wc20) nrog txoj kab uas hla ntawm 2.0 2}} 2.4mm (haum rau nyias-walled yeeb nkab). Av lub taub rau 30-45℃lub kaum ntse ntse los txo arc drift.
Argon roj huv: ntau dua lossis sib npaug nrog 99.99% (siab}}} Weld reld pas dej thiab tiv thaiv kev sib daj sib xyaw ntawm Weld). Ntog tus nqi: 8-12 l / min.
Zinc Tu: Ua kom huv si Weld cheeb tsam (suav nrog cov roj stains thiab zinc txheej) nrog cov av vov lossis dej caw. Txwv tsis pub, txawm tias cov nyiaj zinc ntawm cov chaw seem tuaj yeem ua rau porosity nyob rau hauv Argon tiv thaiv (Tig vuam yog qhov rhiab heev rau impurities). Welding Technique: Siv "Taub Hau Vuam yam tsis muaj cov xaim xaim" (nyias} Kev tuav ntaub hlau "(phab ntsa thickness 1.5 {}} 2 hli). Thaum muab cov xaim uas muab ua kom xaim, maj mam muab cov xaim xaim, cia li pub cov xaim los ntawm cov pas dej hauv av (zam kev sib cuag nrog lub tungsten electrode). Khaws thaj chaw sov sov li 5 hli kom txo qis cov yeeb nkab deformation.
4. Kuj vuam (chaw vuam
Electrode thiab tsis muaj:
: Siv lub copper alloy electrode (zoo heev thermal conductivity) nrog txoj kev du kom tsis txhob muaj cov txheej txheem zinc.
Cov tsis muaj: chaw vuam siab 0.3 - 0.5mpa, hloov mus rau phab ntsa tuab (kwv yees li 5-8ka tuab yeeb nkab). Xyuas kom cov weld saib txoj kab uas hla ntau dua lossis sib npaug ntawm 3 hli tuab cov yeeb nkab huv si (piv txwv li weld ci taub yog ntau dua los yog sib npaug rau 3 hli). Tus qauv sib koom: LAP pob qij txha yuav tsum siv, nrog kev sib tw ntev dua lossis sib npaug nrog 5 zaug ntawm phab ntsa tuab (piv txwv li lossis sib npaug nrog 1 hli yeeb nkab). Zam kev tiv thaiv luv luv uas tuaj yeem ua rau muaj kev tawg. Txias-dip galvanized cov kav dej tuaj yeem yog maj mam muab cov ntaub ntawv ua ntej vuam muag (tsis tas yuav kom huv si; tiv taus tshav kub tuaj yeem qhuav cov txheej zinc).
Post - Weld Kev Kho Mob: Cov seem ntawm zinc uas yuav tsum tau smeeb, uas yuav tsum tau yoog nrog txias- dip galvanizing pleev xim kom tiv thaiv corrosion. III. Cov ntsiab cai ntawm cov txheej txheem xaiv
Raws li ntawm Phab Ntsa Thickness: Tig Vuam / Co₂ Vuam yog nyiam rau nyias phab ntsa (tsawg dua los yog sib npaug ntawm 2 hli); Co₂ vuam yog nyiam rau nruab nrab- cov phab ntsa tuab (2-4 hli); thiab arc vuam yog nyiam rau tuab phab ntsa (ntau dua lossis sib npaug rau 4mm);
Raws li daim ntawv thov: ARC VUAM / E4315 cov hluav taws xob yog nyiam rau thauj khoom {{}} cov kabmob qauv); Co₂ vuam yog nyiam rau Mass-}}}} ua cov khoom hniav zoo nkauj (xws li tus neeg zov); Tig vuam yog nyiam rau high- precision nyias {}}} cov khoom siv kho vaj (xws li cov khoom siv kho mob); thiab kev tawm tsam vuam yog nyiam dua rau cov rooj tog cev;
Raws li kev tiv thaiv ib puag ncig: kev tiv thaiv vuam (zinc fume - dawb rau kev kaw chaw; Arc vuam / co₂ vuam (nrog fume tso cov khoom siv uas yuav tsum tau) yog qhov nyiam rau sab nraum zoov / zoo}} Ultilated ib puag ncig.
Lub ntsiab
Tsis muaj qhov "zoo tshaj plaws" cov txheej txheem vuam rau galvanized lub raj raj raj. Qhov kev xaiv yuav tsum yog ua raws cov kev txiav txim siab ntawm cov yeeb nkab phab ntsa tuab, kev siv tau, thiab ntau lawm tau ua haujlwm. Tus yuam sij yog kom sib piv Weld lub zog thiab corrosion tsis kam los ntawm peb cov kauj ruam tseem ceeb: thiab thov tshaj tawm- weld corrosion tiv thaiv. Piv txwv li, arc vuam nrog E4315 hluav taws xob yog siv rau tuab, thiab kev sib xyaw ua ke rau sab nraum zoov yog siv rau huab hwm coj mus rau sab nraum zoov Tag nrho cov hau kev no tuaj yeem ua tiav ruaj khov thiab txhim khu kev qha vem vuam cov txiaj ntsig.