Hom thiab yam ntxwv ntawm flux-cored vuam hlau
Raws li cov qauv ntawm cov vuam hlau, flux-cored vuam hlau tuaj yeem muab faib ua ob hom: seamed vuam hlau thiab seamless vuam hlau. Seamless vuam hlau tuaj yeem plated nrog tooj liab, uas muaj kev ua tau zoo thiab tus nqi qis thiab tau dhau los ua cov kev taw qhia ntawm kev txhim kho yav tom ntej.
Raws li seb puas muaj cov roj thaiv kev tiv thaiv, flux-cored vuam hlau tuaj yeem muab faib ua roj shielded vuam hlau thiab tus kheej-shielded vuam hlau; Qhov sib xyaw ntawm cov hmoov hauv cov tub ntxhais ntawm flux-cored vuam hlau zoo ib yam li cov txheej txheem electrode, suav nrog arc stabilizer, deoxidizer, slag-forming tus neeg sawv cev thiab tus neeg sawv cev alloying, thiab lwm yam. nyob rau hauv lub puab muab tub lim hmoov ntawm flux-cored vuam hlau, nws yuav muab faib ua "flux hom" vuam hlau thiab "hlau hmoov hom" vuam hlau; Raws li lub hauv paus ntawm slag, nws tuaj yeem muab faib ua titanium hom, titanium calcium hom thiab calcium hom vuam hlau.
Titanium slag-based flux-cored hlau muaj cov hlaws zoo nkauj tsim, zoo tag nrho txoj haujlwm vuam txheej txheem kev ua tau zoo, ruaj khov arc, thiab me me spatter, tab sis lub toughness thiab tawg kuj ntawm cov hlau weld tsis zoo. Nyob rau hauv sib piv, calcium slag-raws li flux-cored xov hlau muaj zoo heev weld toughness thiab tawg tsis kam, tab sis tsis zoo hlaws tsim thiab vuam txheej txheem kev ua tau zoo. Titanium calcium hom slag yog nruab nrab ntawm ob saum toj no.
Cov txheej txheem vuam kev ua tau zoo ntawm "hlau hmoov hom" flux-cored hlau zoo ib yam li cov khoom siv vuam hlau, thiab nws cov kev ua haujlwm zoo thiab tawg ua haujlwm zoo dua li ntawm "flux type" vuam hlau. Feem ntau ntawm cov hmoov hlau yog hlau hmoov (hlau hmoov, deoxidizer, thiab lwm yam), thiab tshwj xeeb arc stabilizer yog ntxiv los xyuas kom meej slag tsim, high efficiency, me me spatter, ruaj khov arc, thiab tsawg diffusible hydrogen ntsiab lus nyob rau hauv lub vuam thaum lub sij hawm vuam. Crack kuj tau zoo dua.
Tus ntoo khaub lig-sectional duab ntawm flux-cored hlau muaj kev cuam tshuam zoo rau cov txheej txheem vuam kev ua tau zoo thiab kev ua haujlwm ntawm metallurgical. Raws li tus ntoo khaub lig-sectional duab ntawm flux-cored vuam hlau, nws tuaj yeem muab faib ua ob hom: yooj yim O zoo thiab folded duab nrog txoj kev hla ntu.
Qhov ntau thiab symmetrical tus ntoo khaub lig-sectional duab ntawm flux-cored hlau, qhov ruaj khov arc ntau dua, thiab ntau txaus cov tshuaj tiv thaiv metallurgical thiab kev tiv thaiv ntawm flux-cored hlau. Txawm li cas los xij, raws li txoj kab uas hla ntawm vuam hlau txo, qhov sib txawv no maj mam nqaim. Thaum txoj kab uas hla ntawm lub vuam hlau yog tsawg dua 2 hli, cov nyhuv ntawm cov duab txiav tsis pom tseeb.
Flux-cored hlau muaj qhov zoo vuam kev ua tau zoo, zoo weld zoo thiab muaj zog yoog rau cov hlau, thiab tuaj yeem siv rau vuam ntau hom steel qauv, nrog rau cov hlau tsis tshua muaj hlau, cov hlau tsis tshua muaj zog hlau, cov hlau tsis muaj steel, cua sov. -Resistant hlau, stainless hlau thiab hnav-resistant surfacing, thiab lwm yam. Cov roj tiv thaiv siv yog CO2 thiab Ar + CO2. Cov qub yog siv rau cov qauv zoo tib yam thiab tom kawg yog siv rau cov qauv tseem ceeb. Flux-cored hlau yog tsim rau tsis siv neeg los yog semi-automatic vuam, ob qho tib si DC thiab AC arcs yuav tsum tau.
1) Flux cored hlau rau qis carbon steel thiab siab zog steel
Feem ntau ntawm cov vuam hlau no yog cov tshuab titanium slag, uas muaj cov txheej txheem vuam zoo thiab cov khoom siv vuam zoo. Lawv tsuas yog siv hauv nkoj tsim, txuas hniav, kev tsim kho, thiab kev tsim tsheb. Muaj ntau ntau yam ntawm flux-cored vuam hlau rau cov hlau tsis tshua muaj hlau thiab cov hlau muaj zog. Los ntawm qib ntawm vuam lub zog, flux-cored vuam hlau nrog tensile zog ntawm 490MPa thiab 590Mpa tau dav siv; Los ntawm qhov kev xav ntawm kev ua tau zoo, qee qhov tsom mus rau cov txheej txheem kev ua tau zoo, thiab qee qhov Nws tsom rau cov khoom siv kho tshuab thiab tawg tsis kam ntawm welds, thiab qee qhov tsim nyog rau txhua txoj haujlwm welding nrog rau nqes ntsug vuam, thiab qee qhov muaj nplooj siab rau fillet welds.
2) Stainless hlau flux cored hlau
Muaj ntau tshaj 20 hom stainless hlau flux-cored vuam hlau, ntxiv rau chromium-nickel stainless hlau flux-cored vuam hlau, kuj tseem muaj chromium-based stainless hlau flux-cored vuam hlau. Txoj kab uas hla ntawm vuam hlau yog 0.8, 1.2, 1.6mm, thiab lwm yam, uas tuaj yeem ua tau raws li qhov xav tau ntawm cov hlau stainless nyias phaj, nruab nrab phaj thiab tuab phaj. Feem ntau ntawm cov roj tiv thaiv siv yog CO2, thiab cov roj sib xyaw ntawm Ar + (20% ~ 50%) CO2 kuj siv tau.
3) Flux-cored hlau rau hnav-resistant surfacing
Txhawm rau kom hnav tsis kam lossis tau txais qee cov khoom tshwj xeeb ntawm cov hlau saum npoo, nws yog ib qho tsim nyog yuav tsum tau hloov qee yam ntawm cov hlau alloying los ntawm vuam hlau, tab sis cov vuam hlau tsis yooj yim rau kev ua thiab tsim khoom vim nws cov ntsiab lus carbon siab thiab alloying. cov ntsiab lus. Nrog rau qhov tshwm sim ntawm flux-cored vuam hlau, cov hlau alloying tuaj yeem muab ntxiv rau hauv cov tub ntxhais flux, thiab kev ua haujlwm thiab kev tsim khoom yooj yim, yog li kev siv cov flux-cored vuam hlau rau submerged arc surfacing hnav-resistant nto yog ib txoj hauv kev. thiab tau siv dav. Tsis tas li ntawd, los ntawm kev ntxiv cov ntsiab lus alloying rau hauv sintered flux, ib txheej txheej nrog cov khoom sib xws kuj tuaj yeem tau txais tom qab ntog.
Feem ntau siv flux-cored hlau CO2 surfacing thiab flux-cored hlau submerged arc surfacing txoj kev yog raws li nram no.
Nyias xaim CO2 flux-cored hlau surfacing Txoj kev no muaj kev siv vuam zoo, thiab kev ua haujlwm ntau lawm yog 3 mus rau 4 npaug ntawm tes arc vuam; Cov txheej txheem vuam kev ua tau zoo yog qhov zoo heev, lub arc ruaj khov, qhov tawg yog me me, cov slag yog yooj yim tshem tawm, thiab qhov saum npoo zoo nkauj. Txoj kev no tsuas tuaj yeem hloov cov ntsiab lus alloying nrog flux-cored xov hlau, thiab feem ntau yog siv rau cov txheej txheej nrog cov hlau tsis tshua muaj hlau.
Flux-cored wire submerged arc surfacing welding txais cov kab loj (3.2, 4.0mm) flux-cored vuam hlau, vuam tam sim no loj, thiab cov vuam tsim tau zoo dua. Thaum siv cov flux, cov ntsiab lus hlau tseem tuaj yeem hloov mus los ntawm cov dej ntws, yog li cov txheej txheem saum npoo tuaj yeem tau txais cov hlau nplaum ntau dua, thiab cov ntsiab lus ntawm cov hlau tuaj yeem hloov pauv ntawm 14% thiab 20% kom tau raws li cov ntawv thov sib txawv. Txoj kev no tsuas yog siv rau saum npoo vuam yob, pub yob, nruam casting yob thiab lwm yam hnav-resistant thiab corrosion-resistant qhov chaw.
