Kuthekani ngesiphumo sokuwelda sesithando somlilo se-vacuum brazing

Kuthekani ngesiphumo sokuwelda sesithando somlilo se-vacuum brazing

Indlela yokugquma kwi-vacuum furnace yindlela entsha yokugquma ngaphandle kokugquma phantsi kweemeko zokugquma. Ngenxa yokuba ukugquma kukwindawo yokugquma, isiphumo esibi somoya kwindawo yokusebenza sinokususwa ngempumelelo, ngoko ukugquma kungenziwa ngempumelelo ngaphandle kokusebenzisa ukugquma. Isetyenziswa kakhulu kwiintsimbi zokugquma kunye nee-alloys ezinzima ukugquma, ezifana nee-alloys ze-aluminium, ii-alloys ze-titanium, ii-alloys zobushushu obuphezulu, ii-alloys ezichaseneyo kunye neeseramikhi. Ijoyinti egqumayo ikhanya kwaye incinci, ineempawu ezilungileyo zoomatshini kunye nokumelana nokugqwala. Izixhobo zokugquma nge-vacuum ngokubanzi azisetyenziselwa ukugquma ngenaliti yentsimbi yekhabhoni kunye nentsimbi ephantsi kwe-alloy.

Izixhobo zokugquma kwi-vacuum furnace zenziwe ikakhulu yi-vacuum brazing furnace kunye ne-vacuum system. Kukho iintlobo ezimbini ze-vacuum brazing Furnaces: I-fireplace eshushu kunye ne-fireplace ebandayo. Ezi ntlobo zimbini ze-furnaces zinokufudunyezwa ngegesi yendalo okanye ngombane, kwaye zinokuyilwa zibe yi-furnace efakwe ecaleni, i-furnace efakwe ezantsi okanye isakhiwo se-furnace efakwe phezulu (uhlobo lwe-Kang). Inkqubo yokugquma ingasetyenziswa ngokubanzi.

Inkqubo yokufunxa ibandakanya ikakhulu iyunithi yokufunxa, umbhobho wokufunxa, ivalvu yokufunxa, njl. Iyunithi yokufunxa idla ngokwenziwa yipompo yoomatshini ejikelezayo kunye nepompo yokufunxa ioyile. Ipompo yoomatshini yodwa inokufumana ngaphantsi kwe-1.35 × Vacuum degree yenqanaba le-10-1pa. Ukuze kufunyanwe i-vacuum ephezulu, ipompo yokufunxa ioyile kufuneka isetyenziswe ngaxeshanye. Ngeli xesha, inokufikelela kwi-1.35 × Vacuum degree yenqanaba le-10-4Pa. Uxinzelelo lwegesi kwinkqubo lulinganiswa nge-vacuum gauge.

Ukugquma kwi-vacuum furnace kugquma kwi-oven okanye kwigumbi lokugquma elinomoya okhutshiweyo. Kufanelekile ngokukodwa ukugquma amalungu amakhulu naqhubekayo, kwaye kufanelekile nokudibanisa ezinye iintsimbi ezikhethekileyo, kubandakanya i-titanium, i-zirconium, i-niobium, i-molybdenum kunye ne-tantalum. Ineendlela ezahlukeneyo zokusetyenziswa. Nangona kunjalo, ukugquma nge-vacuum kukwaneengxaki ezilandelayo:

① Isinyithi kulula ukusitshintsha xa sisetyenziswa nge-vacuum, ngoko ke akufanelekanga ukusebenzisa i-vacuum brazing kwisinyithi esisisiseko kunye nesinyithi esizalisa izinto eziguquguqukayo. Ukuba kuyimfuneko, kuya kuthathwa amanyathelo enkqubo ahambelanayo.

② I-vacuum brazing inovelwano kubunzima bomphezulu, umgangatho wokuhlanganiswa kunye nokunyamezelana kweendawo ezifakwe i-braze, kwaye ifuna umgangatho ophezulu wethiyori wendawo yokusebenza kunye nabaqhubi.

③ Izixhobo zokucoca ziyinkimbinkimbi, zinotyalo-mali olukhulu oluvela kube kanye kwaye zixabisa kakhulu ukugcinwa.

Ngoko ke, ungayisebenzisa njani inkqubo yokurhawula kwi-vacuum furnace? Xa ukurhawula kusenziwa kwi-vacuum furnace, ukurhawula okuza kurhawuzelelwa kufuneka kufakwe kwi-furnace (okanye kwi-brazing vessel), ucango lwe-furnace luza kuvalwa (okanye isigqubuthelo se-brazing vessel sivalwe), kwaye sivalwe ngaphambi kokufudumeza. Qala ipompo yoomatshini kuqala, jika ivalvu yokuqhuba emva kokuba i-vacuum degree ifikelele kwi-1.35pa, vala indlela ethe ngqo phakathi kwepompo yoomatshini kunye ne-brazing furnace, yenza umbhobho oqhagamshelwe kwi-brazing furnace ngepompo yokusasazwa, xhomekeke kwipompo yoomatshini kunye nepompo yokusasazwa ukuze isebenze ngexesha elifutshane, faka i-brazing furnace kwi-vacuum degree efunekayo, uze uqalise umbane wokufudumeza.

Ngexesha lonke lenkqubo yokunyuka nokufudumala kobushushu, iyunithi ye-vacuum iya kuqhubeka isebenza ukugcina inqanaba le-vacuum kwisithando somlilo, ithintele ukuvuza komoya kwiindawo ezahlukeneyo zenkqubo ye-vacuum kunye nesithando somlilo, ukukhululwa kwegesi kunye nomphunga ofakwe eludongeni lwesithando somlilo, isixhobo kunye ne-weldment, ukuguquguquka kwesinyithi kunye ne-oxide, njl.njl., ukuze kuncitshiswe umoya wokwenyani. Kukho iintlobo ezimbini ze-vacuum brazing: i-vacuum brazing ephezulu kunye ne-vacuum engaphelelanga (i-vacuum ephakathi). I-vacuum brazing ephezulu ifanelekile kakhulu kwi-brazing yesinyithi esisisiseko esinzima ukubola (njenge-nickel base superalloy). I-vacuum brazing engaphelelanga isetyenziselwa amaxesha apho isinyithi esisisiseko okanye isinyithi esizalisayo sitshintsha phantsi kobushushu be-brazing kunye neemeko eziphezulu ze-vacuum.

Xa kufuneka kuthathwe amanyathelo akhethekileyo okuqinisekisa ubunyulu obuphezulu, kufuneka kusetyenziswe indlela yokucoca i-vacuum ngaphambi kokuba kufakwe i-hydrogen brazing eyomileyo. Ngokufanayo, ukusebenzisa i-hydrogen eyomileyo okanye indlela yokucoca igesi engangeniyo ngaphambi kokuba kufakwe i-vacuum kuya kunceda ukufumana iziphumo ezingcono kwi-vacuum brazing ephezulu.