Uthini malunga nefuthe le-welding ye-vacuum brazing oven

Uthini malunga nefuthe le-welding ye-vacuum brazing oven

Indlela yokutshisa kwi-vacuum furnace 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.I-brazed joint ekhanyayo kwaye idibene, 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 ukutshisa kusenziwa kwisithando somlilo, i-weldment ekufuneka idityaniswe iya kulayishwa eziko (okanye kwisitya sokutshisa), ucango lwesithando somlilo luya kuvalwa (okanye isigqubuthelo sesitya sokutshisa siya kuvalwa), kwaye sitshizwe ngaphambili. ukufudumeza.Qala impompo yomatshini kuqala, vula ivalve yokuqhuba emva kokuba isidanga sevacuum sifike kwi-1.35pa, vala indlela ethe ngqo phakathi kwempompo yoomatshini kunye nesithando somlilo, yenza umbhobho oqhagamshelwe nesithando somlilo ngempompo yokusasaza, uthembele kwimpompo yomatshini kunye impompo yokusasaza ukusebenza ngexesha elincinci, ukumpompa isithando somlilo ukuya kwiqondo elifunekayo lokucoca, kwaye emva koko uqalise amandla ekufudumeni.

Ngexesha lonke lenkqubo yokunyuka kwamaqondo obushushu kunye nokufudumeza, iyunithi yokucoca iya kuqhubeka isebenza ukugcina idigri yevacuum kwisithando somlilo, isuse ukuvuza komoya kwiindawo ezahlukeneyo zenkqubo yokucoca kunye nesithando somlilo, ukukhutshwa kwegesi kunye ne-steam adsorbed kwisixhobo somlilo. udonga lwesithando somlilo, ukulungiswa kunye ne-weldment, i-volatilization yesinyithi kunye ne-oxide, njl., Ukunciphisa umoya wenyaniso.Kukho iindidi ezimbini ze-vacuum brazing: i-vacuum brazing ephezulu kunye ne-partial vacuum (i-vacuum ephakathi) 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.