Uthini malunga nefuthe le-welding ye-vacuum brazing oven

Uthini malunga nefuthe le-welding ye-vacuum brazing oven

Indlela yokuqhawula kwisithando somlilo yindlela entsha yokuqhawula ngaphandle kwe-flux phantsi kweemeko ze-vacuum. Ngenxa yokuba i-brazing isendaweni ye-vacuum, umphumo onobungozi womoya kwi-workpiece inokupheliswa ngokufanelekileyo, ngoko ukunyanzeliswa kunokwenziwa ngempumelelo ngaphandle kokusebenzisa i-flux. Ikakhulu isetyenziselwa ukubrawuza isinyithi kunye neealloyi ekunzima ukuziqhayisa, ezifana ne-aluminium alloys, i-titanium alloys, i-high-temperature alloys, i-alloys ephikisayo kunye neekeramics. Umdibaniso odibeneyo uqhakazile kwaye udibene, kunye neempawu ezintle zoomatshini kunye nokumelana nokubola. Izixhobo zokutshiza i-vacuum azisetyenziswanga ukuwelda inaliti yentsimbi yekhabhoni kunye nentsimbi ephantsi.

Izixhobo zokutshisa kwi-vacuum furnace zibandakanya isithando somlilo kunye nenkqubo yokucoca. Kukho iindidi ezimbini ze-vacuum brazing Furnaces: Indawo yomlilo eshushu kunye neziko elibandayo. Ezi ntlobo zimbini zeziko zinokufudunyezwa ngegesi yendalo okanye ukufudumeza kombane, kwaye zinokuthi ziyilwe kwisithando somlilo esisecaleni, isithando somlilo esisezantsi okanye isithando somlilo esiphezulu (uhlobo lweKang) isakhiwo. Inkqubo yokucoca inokusetyenziswa ngokubanzi.

Inkqubo yokufunxa ikakhulu ibandakanya iyunithi yokufunxa, umbhobho wokufunxa, ivalve yokufunxa, njl njl. Impompo yomatshini yodwa inokufumana kuphela ngaphantsi kwe-1.35 × idigri yeVacuum yezinga le-10-1pa. Ukuze ufumane i-vacuum ephezulu, ipompo yokusasazwa kweoli kufuneka isetyenziswe ngaxeshanye. Ngeli xesha, inokufikelela kwi-1.35 × i-vacuum degree ye-10-4Pa level. Uxinzelelo lwegesi kwinkqubo lulinganiswa nge-vacuum gauge.

I-Brazing in vacuum furnace kukugcoba kwisithando somlilo okanye igumbi lokutshisa kunye nomoya okhishiwe. Ifaneleke ngakumbi ukudibanisa amajoyina amakhulu kunye aqhubekayo, kwaye ifanelekile ukudibanisa ezinye iintsimbi ezikhethekileyo, kuquka i-titanium, i-zirconium, i-niobium, i-molybdenum kunye ne-tantalum. Inoluhlu olubanzi lwezicelo. Nangona kunjalo, i-vacuum brazing nayo ineziphene zilandelayo:

① Intsimbi ilula ukuguquguquka phantsi kwe-vacuum, ngoko ayifanelekanga ukusebenzisa i-vacuum brazing kwisiseko sesinyithi kunye nentsimbi yokuzalisa izinto eziguquguqukayo. Ukuba kuyimfuneko ukusebenzisa, imilinganiselo ehambelanayo yenkqubo enzima iya kwamkelwa.

② I-vacuum brazing inovakalelo kuburhabaxa bomphezulu, umgangatho wokudityaniswa kunye nokunyamezelana okufanelekileyo kwamalungu ebrazed, kwaye ifuna inqanaba eliphezulu lethiyori yendawo yokusebenza kunye nabaqhubi.

③ Izixhobo zokufunxa zintsonkothile, kunye notyalo-mali olukhulu lwexesha elinye kunye neendleko eziphezulu zokugcina.

Ke, ukuphumeza njani inkqubo yokuqhola kwi-vacuum furnace? Xa i-brazing iqhutyelwa kwi-vacuum vacuum, i-weldment ukuba ifakwe kwi-welded iya kulayishwa kwiziko (okanye kwisitya sokutshisa), umnyango wesithando somlilo uya kuvalwa (okanye isigqubuthelo sesitya sokutshiza siya kuvalwa), kwaye sitshiswe ngaphambili ngaphambi kokufudumeza. Qala impompo yoomatshini kuqala, ujike ivalve yokuqhuba emva kokuba isidanga sokucoca sifike kwi-1.35pa, vala indlela ethe ngqo phakathi kwempompo yoomatshini kunye neziko lokutshisa, yenza umbhobho oqhagamshelwe neziko lokutshisa ngempompo yokusasaza, uthembele kwimpompo yomatshini kunye nempompo yokusasaza ukuba isebenze ngexesha eliqingqiweyo, pompa isithando somlilo esivuthayo ukuya kwisidanga sokufudumeza emva koko.

Ngethuba lenkqubo yonke yokunyuka kweqondo lokushisa kunye nokufudumeza, iyunithi yokucoca iya kuqhubeka isebenza ukugcina idigri ye-vacuum kwisithando somlilo, ukucima ukuvuza komoya kwiindawo ezahlukeneyo zenkqubo ye-vacuum kunye nesithando somlilo, ukukhutshwa kwegesi kunye ne-steam adsorbed eludongeni lwesithando somlilo, ukulungiswa kunye ne-weldment, i-volatilization yesinyithi kunye ne-asidi yokwenene, i-air to . Kukho iindidi ezimbini ze-vacuum brazing: i-vacuum brazing ephezulu kunye ne-partial vacuum (i-medium vacuum) yokubrawuza. I-vacuum brazing ephezulu ifaneleke kakhulu ukubethelwa kwesinyithi esisisiseko esine-oxide enzima ukubola (njenge-nickel base superalloy). I-partial vacuum brazing isetyenziselwa iziganeko apho isiseko sesinyithi okanye i-filler metal iguquguqukayo phantsi kobushushu bokushisa kunye neemeko eziphezulu ze-vacuum.

Xa kufuneka kuthathwe amanyathelo akhethekileyo okuqinisekisa ukucoceka okuphezulu, indlela yokucoca i-vacuum iya kwamkelwa ngaphambi kokuba i-hydrogen brazing eyomileyo. Ngokufanayo, ukusebenzisa i-hydrogen eyomileyo okanye indlela yokucoca igesi engasebenziyo ngaphambi kokucoca kuya kunceda ukufumana iziphumo ezingcono kwi-vacuum brazing ephezulu.