Taw qhia ntawm surfacing vuam txheej txheem rau nickel-based alloys
Nickel-based alloys muaj cov khoom zoo ntawm kev ua haujlwm tsis zoo ntawm cov roj reactive, hnav-resistant thiab acid-resistant nruab nrab corrosion, thiab muaj cov yam ntxwv ntawm lub zog siab, zoo plasticity, kub thiab txias deformation, ua thiab vuam, thiab yog ib qho tseem ceeb heev corrosion- cov khoom siv hlau resistant.
Nyob rau hauv daim ntaub ntawv surfacing, carbon hlau los yog stainless hlau yuav surfacing nrog ib txheej ntawm npib tsib xee-raws li hlau raws li ib tug dielectric txheej, kom nws muaj qhov zoo ntawm ob hlau. Cov khoom siv vuam hom no txawv kiag li ntawm cov hlau alloying zoo tib yam. Nyob rau hauv vuam, sib txawv vuam txoj kev yuav tsum tau saws rau vuam.
Vim muaj qhov sib txawv ntawm lub cev ntawm cov hlau hauv qhov chaw vuam, cov nickel-based alloy welding pas dej ua ke yog qhov khov heev thiab qhov tob tob yog qhov tob. Ua kom cov vuam tam sim no tsis tuaj yeem txhim kho qhov fluidity ntawm cov hlau thiab ua kom qhov tob tob.
Tsis zoo li cov hlaws concave feem ntau tsim nyob rau hauv stainless hlau, cov hlaws saum npoo ntawm cov nickel-raws li alloys yog markedly convex.
Txhawm rau tiv thaiv crystal cracking, tshwj xeeb tshaj yog thawj txheej ntawm crystal cracking ntawm lub vuam cag, nws tuaj yeem raug tshem tawm los ntawm kev sau cov vuam hlau nrog me me tam sim no.
Thaum thov argon arc vuam, cov khoom siv vuam yuav tsum tsis txhob muab tso rau hauv lub pas dej molten. Cov khoom siv vuam yuav tsum tau muab tso rau pem hauv ntej ntawm tungsten electrode thiab pub thaum melting. Qhov kawg ntawm cov khoom siv vuam yog ib txwm tiv thaiv los ntawm argon roj.
Lub fluidity ntawm nickel-raws li vuam consumables tsis zoo thiab tam sim no yuav tsum tsis txhob loj heev, vuam ceev yog qeeb, thiab vuam yuav tsum tau ua tib zoo tswj.
Thaum vuam, txawm tias nws yog interlayer vuam los yog npog vuam, xyuam xim rau argon tiv thaiv thaum vuam los tiv thaiv vuam ib feem ntawm oxidized.
Qhov kev ua haujlwm txias hardening nyiam ntawm cov khoom sib txawv yog txawv. Piv txwv li, qhov txias ua hauj lwm hardening nyiam ntawm npib tsib xee-raws li alloys yog 1 ~ 2 zaug siab dua cov hlau tsis muaj steel. Yog li ntawd, yog tias qhov vuam tsis tswj tau, nws yooj yim rau khoov.
Lub zog ntawm ob qhov sib txawv ntawm cov hlau tsis sib xws nyob rau hauv qhov chaw vuam sib txawv, yog li them sai sai rau kev ntxhov siab tawg ntawm cov hauv paus hniav tom qab vuam.
Nickel-raws li alloy weld hlau tsis ntub thiab kis tau yooj yim zoo li cov hlau vuam hlau. Txawm tias nce qhov vuam tam sim no tsis txhim kho qhov fluidity ntawm cov hlau vuam, tab sis muaj kev cuam tshuam tsis zoo. Yog hais tias lub vuam tam sim no tshaj qhov kev pom zoo, nws yuav tsis tsuas yog overheat lub pas dej ua ke, ua rau kom lub rhiab heev ntawm kub tawg, thiab txo cov corrosion kuj vim coarse nplej, tab sis kuj ua rau cov deoxidizer nyob rau hauv lub weld hlau evaporate, ua rau pores. tshwm.
Nyob rau hauv electrode arc vuam, lub vuam tam sim no ntau dhau kuj overheats cov electrode thiab ua rau cov txheej txheem poob, poob nws cov nyhuv tiv thaiv. Vim tias qhov dej tsis zoo ntawm cov hlau weld, nws tsis yooj yim rau ntws mus rau ob sab ntawm lub vuam. Txhawm rau kom tau txais kev sib txuas zoo, qee zaum siv cov txheej txheem wobble. Tab sis lub viav vias no yog lub viav vias me me, thiab lub viav vias deb tsis tshaj 3 npaug ntawm txoj kab uas hla ntawm vuam hlau lossis electrode. Cov teeb meem muaj qee zaum pom nyob rau hauv electrode arc vuam txawm tias nrog cov txheej txheem wobble.
Qhov tsis xws luag feem ntau suav nrog undercut thiab unmelted ntug. Txhawm rau tshem tawm cov teeb meem no, thaum lub vuam viav vias mus rau qhov txwv txoj hauj lwm ntawm txhua sab, nws yog ib qho tsim nyog yuav tsum tau nres ib ntus kom tso cai rau lub sijhawm txaus rau cov hlau molten weld kom tag nrho fuse nrog lub hauv paus hlau, thiab sau rau hauv cheeb tsam undercut. . Lwm cov txheej txheem tseem ceeb uas yuav tsum tau siv rau hauv electrode arc vuam yog qhov vuam arc yuav tsum luv li sai tau.
Thaum lub sij hawm vuam txheej txheem, cov yam ntxwv ntawm cov electrode nickel-based alloy txiav txim siab tias qhov nkag mus ntawm cov hlau molten yog qhov ntiav, thiab qhov teeb meem no tsis tuaj yeem daws tau yooj yim los ntawm kev kho cov vuam tsis.
Raws li kev sim rov ua dua, txoj hauv kev los kov yeej qhov kev nkag mus hauv qhov ntiav yog hloov kho cov qauv groove, thiab lub kaum sab xis ntawm qhov zawj yog qhov haum ntawm 40 degrees thiab 65 degrees.
Kev vuam ntawm cov ntaub ntawv nickel-raws li cov khoom siv tau nruj dua nyob rau saum npoo ntawm cov vuam ntau dua li carbon steel thiab stainless hlau. Thaum vuam nickel-raws li cov ntaub ntawv, nws yuav tsum tau welded rau hauv ib tug convex hlaws. Feem ntau ntawm kev tawg hauv vuam ntawm cov khoom siv nickel-based yog vim lub zog tsis sib xws los ntawm cov hlaws concave.
Lub interlayer kub hauv cov txheej txheem vuam ntawm cov ntaub ntawv nickel-based surfacing yuav tsum tsis txhob siab dhau, feem ntau qis dua 100 degree. Vuam ntawm nickel-based alloy cov ntaub ntawv feem ntau tsis tas yuav tsum tau preheating thiab tom qab cua sov kho.
