Kuthiwani ngomphumela we-welding we-vacuum brazing furnace
Indlela yokufaka i-brazing esithandweni se-vacuum iyindlela entsha yokubhula ngaphandle kwe-flux ngaphansi kwezimo ze-vacuum.Ngenxa yokuthi i-brazing isendaweni ye-vacuum, umphumela oyingozi womoya ku-workpiece ungaqedwa ngokuphumelelayo, ngakho-ke i-brazing ingenziwa ngempumelelo ngaphandle kokufaka i-flux.Isetshenziswa kakhulu ekuqiniseni izinsimbi kanye nama-alloys okunzima ukuwaqinisa, njengama-alloys e-aluminium, ama-alloys e-titanium, ama-alloys ashisa kakhulu, ama-alloys aphikisayo kanye nezitsha zobumba.Ilunga le-brazed ligqamile futhi lihlangene, linezakhiwo ezinhle zemishini nokumelana nokugqwala.Imishini ye-vacuum brazing ngokuvamile ayisetshenziselwa ukushisela inaliti ye-carbon steel ne-low alloy steel.
Imishini ye-brazing esithandweni se-vacuum yakhiwa ikakhulukazi isithando somlilo esishisayo kanye nesistimu ye-vacuum.Kunezinhlobo ezimbili ze-vacuum brazing Furnaces: indawo yomlilo eshisayo nendawo yomlilo ebandayo.Lezi zinhlobo ezimbili zezithando zomlilo zingashiswa ngegesi yemvelo noma ukushisisa kukagesi, futhi zingaklanywa zibe isithando somlilo esibekwe eceleni, isithando somlilo esibekwe phansi noma isakhiwo somlilo obekwe phezulu (uhlobo lwe-Kang).Isistimu ye-vacuum ingasetshenziswa ngokujwayelekile.
Isistimu ye-vacuum ikakhulukazi ihlanganisa iyunithi ye-vacuum, ipayipi le-vacuum, i-vacuum valve, njll. Iyunithi ye-vacuum ivamise ukwakhiwa ngephampu yemishini ye-rotary vane kanye nephampu yokusabalalisa uwoyela.Iphampu yomshini iyodwa ingathola kuphela ngaphansi kuka-1.35 × Idigri yeVacuum yeleveli engu-10-1pa.Ukuze uthole i-vacuum ephezulu, ipompo yokusabalalisa uwoyela kufanele isetshenziswe ngesikhathi esifanayo.Ngalesi sikhathi, ingafinyelela ku-1.35 × Vacuum degree yezinga le-10-4Pa.Ingcindezi yegesi ohlelweni ikalwa nge-vacuum gauge.
I-Brazing ku-vacuum furnace iwukubasa esithandweni noma ekamelweni elishisayo elikhipha umoya.Ifaneleka ngokukhethekile ukuqinisa amalunga amakhulu naqhubekayo, futhi ifanele ukuxhuma ezinye izinsimbi ezikhethekile, kuhlanganise ne-titanium, i-zirconium, i-niobium, i-molybdenum ne-tantalum.Inohlu olubanzi lwezinhlelo zokusebenza.Kodwa-ke, i-vacuum brazing nayo inokungalungi okulandelayo:
① Insimbi kulula ukuyishintshashintsha ngaphansi kwe-vacuum, ngakho-ke ayifaneleki ukusebenzisa i-vacuum brazing kusisekelo sensimbi kanye nensimbi yokugcwalisa yezinto eziguquguqukayo.Uma kudingekile ukusebenzisa, izinyathelo ezihambisanayo zenqubo eyinkimbinkimbi zizokwamukelwa.
② I-vacuum brazing izwela ubulukhuni obungaphezulu, ikhwalithi yokuhlanganisa kanye nokubekezelela okulinganayo kwezingxenye eziqinile, futhi kudinga izinga eliphezulu lethiyori lendawo yokusebenza nama-opharetha.
③ Imishini ye-vacuum iyinkimbinkimbi, inotshalomali olukhulu lwesikhathi esisodwa kanye nezindleko eziphezulu zokunakekela.
Ngakho-ke, ungayisebenzisa kanjani inqubo ye-brazing esithandweni se-vacuum?Lapho i-brazing yenziwa esithandweni se-vacuum, i-weldment ezoshiselwa izolayishwa esithandweni (noma emkhunjini wokushisela), umnyango wesithando somlilo uzovalwa (noma isembozo sesitsha esishisayo sizovalwa), futhi sivalwe ngaphambili. ukushisa.Qala iphampu yomshini kuqala, vula i-valve yokuqondisa ngemva kokuthi idigri ye-vacuum ifinyelela ku-1.35pa, vala indlela eqondile phakathi kwephampu engumshini nesithando somlilo esivuthayo, yenza ipayipi elixhunywe nesithando somlilo ngephampu yokusabalalisa, thembela empompini engumshini futhi iphampu yokusabalalisa ukuze isebenze phakathi nesikhathi esilinganiselwe, impompa isithando somlilo siye ku-vacuum degree edingekayo, bese uqala amandla ekushisiseni.
Phakathi nayo yonke inqubo yokushisa nokushisa, iyunithi ye-vacuum izoqhubeka nokusebenza ukugcina i-vacuum degree esithandweni somlilo, isuse ukuvuza komoya ezindaweni ezihlukahlukene zesistimu ye-vacuum kanye nesithando somlilo esishisayo, ukukhululwa kwegesi kanye ne-steam adsorbed esithandweni. udonga lwesithando somlilo, ukulungiswa kanye nokushisela, ukuvuthwa kwensimbi ne-oxide, njll., ukuze kuncishiswe umoya weqiniso.Kunezinhlobo ezimbili ze-vacuum brazing: i-vacuum brazing ephezulu kanye ne-vacuum eyingxenye (i-medium vacuum) yokubhula.I-vacuum brazing ephezulu ifaneleka kakhulu ukubhula insimbi eyisisekelo okunzima ukuyibola i-oxide (njenge-nickel base superalloy).I-vacuum brazing eyingxenye isetshenziselwa izikhathi lapho isisekelo sensimbi noma insimbi yokugcwalisa ishintshashintsha ngaphansi kwezinga lokushisa elishisayo nezimo eziphezulu zokuvala.
Lapho kufanele kuthathwe izinyathelo ezikhethekile zokuqinisekisa ukuhlanzeka okuphezulu, indlela yokuhlanza i-vacuum kufanele yamukelwe ngaphambi kokufakwa kwe-hydrogen eyomile.Ngokufanayo, ukusebenzisa i-hydrogen eyomile noma indlela yokuhlanza igesi ye-inert ngaphambi kokuhlanza kuzosiza ukuthola imiphumela engcono ekubrazeni kwe-vacuum ephezulu.
Isikhathi sokuthumela: Jun-21-2022