Kev kho cov txheej txheem ntawm cov hlau deg kho tshuab Vim muaj cov tshuaj lom neeg muaj zog ntawm txhuas thiab nws cov alloys, nws yooj yim los tsim oxide zaj duab xis rau saum npoo, thiab feem ntau ntawm lawv yog refractory (piv txwv li, lub melting point ntawm Al2O3 yog hais txog 2050 degree. , thiab lub melting point ntawm MgO yog hais txog 2500 degree). ) Tsis tas li ntawd, aluminium thiab nws cov alloys muaj zog thermal conductivity, thiab nws yog ib qho yooj yim ua rau tsis muaj fusion tshwm sim thaum vuam. Txij li qhov tshwj xeeb lub ntiajteb txawj nqus ntawm oxide zaj duab xis yog ze rau ntawm aluminium, nws kuj yog ib qho yooj yim los ua inclusions nyob rau hauv cov hlau weld. Nyob rau tib lub sijhawm, aluminium thiab nws cov alloys muaj cov coefficient loj ntawm kev nthuav dav thiab muaj zog thermal conductivity, thiab muaj kev cuam tshuam rau kev sib hloov deformation thaum vuam. Qhov no yog ib qho teeb meem nyuaj thaum vuam aluminium thiab nws cov alloys. Tam sim no, feem ntau siv argon arc vuam nyob rau hauv fusion welding cia siab rau "cathode atomization" los rhuav cov oxide zaj duab xis, thiab nyob rau hauv kev tiv thaiv ntawm argon gas, oxide zaj duab xis yuav tsis tau regenerated. Txawm li cas los xij, thaum welding aluminium alloy tom qab kev kho cua sov kom muaj zog, lub zog ntawm qhov ze ntawm seam cheeb tsam yog qhov tsis muaj zog, thiab warpage deformation yuav inevitably tshwm sim. Hlau nto kho tshuab yog tsuas yog siv los kho qhov tsis xws luag casting. Nws muaj lub tshuab hluav taws xob ntau zaus ntxiv rau cov khoom siv hluav taws xob, lub vuam hluav taws xob uas tuaj yeem tig cov vuam hlau ntawm kev kub ceev, thiab kev tswj xyuas ib feem. Cov txheej txheem ntawm kev kho qhov tsis xws luag yog raws li hauv qab no: siv lub siab zaus ntxiv rau cov mem tes hluav taws xob txhawm rau txhawm rau ua cov pa roj plasma, yog li tsim hluav taws xob hluav taws xob nrog qhov kub thiab txias tshaj 6000 degree, thiab hluav taws xob hluav taws xob yuav tam sim ntawd ({{7} } vib nas this) thiab lub hauv paus hlau nyob rau hauv kev sib cuag nrog nws yog melted nyob rau tib lub sij hawm, cia siab rau kev sib koom ua ke ntawm instantaneous kub kub thiab cov neeg kho tshuab kev sib txhuam ntawm lub rotating vuam hlau thiab lub hauv paus hlau thiab rotating hluav taws xob teb quab yuam, lub oxide. zaj duab xis yog tawg, thiab nyob rau hauv kev tiv thaiv ntawm argon, oxide zaj duab xis yog tawg. Cov yeeb yaj kiab tsis tuaj yeem rov tsim dua tshiab, yog li ua kom tiav cov hlau sib txuas ntawm cov hlau mus rau lub hauv paus hlau. Vim lub sij hawm luv luv ntawm cov hluav taws xob hluav taws xob, lub hauv paus hlau nyob rau hauv kev sib cuag ncaj qha nrog cov vuam hlau yog ib nrab melted, thiab thermal conductivity ntawm txhuas yog zoo heev. Cov tsis xws luag yog kho tom qab machining ntawm aluminium castings yam tsis muaj kev cuam tshuam qhov tseeb qhov tseeb. Tom qab kho, qhov saum npoo tuaj yeem ua tiav thiab polished lossis machined, thiab cov tsos tuaj yeem ua raws li lub hauv paus.
