Kev kho qhov tsis zoo ntawm cov cuab yeej siv tshuab castings: Cov txiaj ntsig ntawm kev kho qhov tsis xws ntawm lub tshuab cuab yeej castings los ntawm ntau cov txheej txheem vuam tsoos raug tshuaj xyuas los txiav txim seb qhov laj thawj ntawm kev kho tsis zoo ntawm cov cuab yeej siv tshuab castings. Los ntawm kev kawm txog kev kho cov txiaj ntsig ntawm kev kho cov cav tov hauv cov cuab yeej siv tshuab castings, lub tshuab tshiab thiab nws cov txheej txheem rau kev kho ntawm lub tshuab cuab yeej castings tau txiav txim siab tias yuav ua tau tiag tiag.
1, Txau vuam
Raws li kev ua tiav ntawm cov txheej txheem tshuaj tsuag welding, cov lus qhia saum npoo yuav tsum tau preheated rau ntau tshaj 150 degree, tom qab ua tiav thawj zaug txau ntawm cov hmoov vuam, cov tshuaj txau yuav ua kom sov rau ntau tshaj 900 degree - 1200 degree, yog li tias cov hmoov welding melted los ua ib qho chaw tiaj tus. Vim tias lub sijhawm ua ntej thiab cua sov yog qhov ntev, qhov chaw ua haujlwm yog qhov chaw sov dua, qhov kev ntxhov siab thermal loj dua, feem ntau yuav tsim cov kab nrib pleb dua li arc vuam, thaum cov kab shrinkage muaj ntau dua los ua cov kab nrib pleb. Raws li qhov kev nyiam tawg yog cuam tshuam los ntawm cov tshuaj tsuag welding lub sij hawm, tshuaj tsuag txheej tuab thiab lwm yam, qhov loj ntawm qhov tsis xws luag yog me ntsis txwv, thiab qhov tsis xws luag yuav tsum tau muab ntxuav, vim muaj feem ntau ntawm fe nyob rau hauv cov tshuaj tsuag hmoov. tsim ntawm cov tshuaj tsuag txheej yog zoo ib yam li cov xim ntawm cov khoom siv hauv paus dua li arc vuam. Tab sis vim muaj qee qhov nyiaj ntawm ni, yog li tsis tuaj yeem nyob ze rau cov xim ntawm cov khoom siv niam txiv, vuam tuaj yeem ua machined tom qab kho.
2, Arc vuam
Weld nrog cam khwb cia hlau vuam pas nrig z248, vuam txheej txheem muab faib ua ob hom, thawj: preheating rau 550 degree -650 degree ua ntej vuam, vuam tom qab rwb thaiv tsev 5-8 teev; qhov thib ob: lub workpiece tsis preheated ua ntej welding, tom qab vuam rwb thaiv tsev 3-4 teev. Ob txoj hauv kev yog qhov ua rau tawg, tawv me ntsis, kev kho vuam tom qab kev siv tshuab tsis yooj yim. Lub vuam pas nrig yog pheej yig. Nrog npib tsib xee-raws li cam khwb cia hlau vuam qws z308 vuam qws vuam, vuam txheej thiab vuam txheej yuav tsum tau ncua ntawm txias mus rau 60 degree los yog tsawg dua, vuam thaj tsam tsawg porosity, tawg, zoo machinability, siab daim ntawv cog lus zog, tsis muaj tshwm sim tshwm sim, vim lub tshuab cuab yeej qhia kev ua cov roj nqus thiab vuam pas nrig tshuab lub zog, yooj yim los tsim tom, tsim "welding patch marks", vuam thaj tsam xim thiab cov khoom siv niam txiv sib txawv heev, thiab tus nqi ntawm vuam pas nrig yog kim.
Los ntawm kev soj ntsuam ntawm cov txiaj ntsig tuaj yeem muab tau: cov txheej txheem vuam tsoos kho tsis tuaj yeem daws tau tag nrho cov cuab yeej siv lub tshuab ua haujlwm tsis raug kho qhov laj thawj tseem ceeb yog kev sib koom ua ke ntawm cov tshuaj tsuag vuam, cov txheej txheem arc vuam, tom qab vuam yooj yim los tsim cov kab nrib pleb, cov khoom ua haujlwm raug rau Thaum tshav kub kub deformation, yooj yim tshwm sim thib ob porosity, vuam ntawm cov hlau xim sib txawv nrog cov khoom siv niam txiv yog nws cov yam ntxwv.