1. I-brazing material
(1) I-Titanium nama-alloys ayo ayisisekelo akuvamile ukuba ifakwe i-solder ethambile. Izinsimbi zokugcwalisa ezisetshenziselwa ukubhula ikakhulukazi zifaka isisekelo sesiliva, isisekelo se-aluminium, isisekelo se-titanium noma isisekelo se-titanium zirconium.
I-solder esekelwe esiliva isetshenziselwa ikakhulukazi izingxenye ezinezinga lokushisa elingaphansi kuka-540 ℃. Amalunga asebenzisa i-solder yesiliva ehlanzekile anamandla aphansi, kulula ukuqhekeka, futhi amelana kabi nokugqwala kanye nokumelana ne-oxidation. Izinga lokushisa elishisayo le-Ag Cu solder liphansi kunelesiliva, kodwa ukumanzisa kuyehla ngokunyuka kokuqukethwe kwe-Cu. Isoda ye-Ag Cu equkethe inani elincane lika-Li ingathuthukisa ukumanzisa kanye nezinga le-alloying phakathi kwe-solder nesisekelo sensimbi. I-AG Li solder inezici zendawo encibilikayo ephansi kanye nokunciphisa okunamandla. Ilungele i-brazing titanium kanye ne-titanium alloys endaweni evikelayo. Nokho, i-vacuum brazing izongcolisa isithando somlilo ngenxa yokuhwamuka kwe-Li. I-Ag-5al- (0.5 ~ 1.0) I-Mn filler metal iyinsimbi ekhethwayo yokugcwalisa izingxenye zengxube ye-titanium enezindonga ezincane. I-brazed joint ine-oxidation enhle kanye nokumelana nokugqwala. Amandla e-shear we-titanium ne-titanium alloy joints aboshwe ngensimbi yokugcwalisa isisekelo sesiliva akhonjiswe kuThebula 12.
Ithebula 12 lamapharamitha enqubo yokubraziza namandla ahlangene we-titanium ne-titanium alloys
Ukushisa kwe-brazing ye-aluminium esekelwe ku-solder kuphansi, okungeke kubangele ukuvela kwe-titanium alloy β ukuguqulwa kweSigaba kunciphisa izidingo zokukhethwa kwezinto zokulungisa i-brazing kanye nezakhiwo. Ukusebenzisana phakathi kwensimbi yokugcwalisa kanye nesisekelo sensimbi kuphansi, futhi ukuchithwa nokusabalalisa akubonakali, kodwa i-plasticity yensimbi yokugcwalisa inhle, futhi kulula ukugoqa insimbi yokugcwalisa kanye nensimbi eyisisekelo ndawonye, ngakho-ke ifaneleka kakhulu i-brazing titanium alloy radiator, isakhiwo sezinyosi kanye nesakhiwo se-laminate.
Ama-fluxes asekelwe ku-titanium noma i-titanium zirconium ngokuvamile aqukethe i-Cu, i-Ni nezinye izakhi, ezingasakazeka ngokushesha ku-matrix futhi zisabele nge-titanium phakathi nokugqama, okuholela ekugqwaleni kwe-matrix nasekwakhekeni kongqimba oluphukayo. Ngakho-ke, izinga lokushisa lokubamba kanye nesikhathi sokubamba kufanele kulawulwe ngokuqinile ngesikhathi sokubhula, futhi akufanele kusetshenziselwe ukubrasa izakhiwo ezinezindonga ezincane kakhulu ngangokunokwenzeka. I-B-ti48zr48be iyi-solder ye-Ti Zr evamile. Inokumanzisa okuhle ku-titanium, futhi isisekelo sensimbi asinakho ukuthambekela kokukhula okusanhlamvu ngesikhathi sokubhula.
(2) Izinsimbi zokugcwalisa i-brazing ze-zirconium nama-base alloys brazing ye-zirconium nama-base alloys ikakhulukazi afaka i-b-zr50ag50, b-zr76sn24, b-zr95be5, njll., esetshenziswa kabanzi ekubhuqeni amapayipi e-zirconium alloy we-reactors yamandla enyukliya.
(3) I-brazing flux kanye nomoya ovikelayo we-titanium, i-zirconium kanye nama-alloys ayisisekelo angathola imiphumela egculisayo ku-vacuum ne-inert atmosphere (i-helium ne-argon). I-argon yokuhlanzeka okuphezulu izosetshenziselwa ukubhula okuvikelwe kwe-argon, futhi indawo yamazolo kufanele ibe -54 ℃ noma ngaphansi. I-fluoride ekhethekile equkethe i-fluoride ne-chloride yensimbi engu-Na, K kanye ne-Li kufanele isetshenziselwe ukubhula amalangabi.
2. Ubuchwepheshe be-Brazing
Ngaphambi kokubopha, ingaphezulu kufanele lihlanzwe kahle, likhishwe amafutha kanye nefilimu ye-oxide. Ifilimu ye-oxide ewugqinsi kufanele isuswe ngendlela yomshini, indlela yokuqhuma kwesihlabathi noma indlela yokugeza usawoti oncibilikisiwe. Ifilimu encane ye-oxide ingaqedwa kusixazululo esiqukethe 20% ~ 40% nitric acid kanye 2% hydrofluoric acid.
I-Ti, i-Zr kanye nama-alloys awo awavunyelwe ukuthintana nendawo ehlangene ngomoya ngesikhathi sokushisisa. I-Brazing ingenziwa ngaphansi kokuvikelwa kwe-vacuum noma igesi ye-inert. Ukushisa kokungenisa imvamisa ephezulu noma ukufudumeza ekuvikeleni kungasetshenziswa. Ukushisa kwe-induction kuyindlela engcono kakhulu yezingxenye ezincane ezilinganayo, kuyilapho ukugqama esithandweni kunenzuzo kakhulu ezingxenyeni ezinkulu neziyinkimbinkimbi.
I-Ni Cr, i-W, i-Mo, i-Ta nezinye izinto zizokhethwa njengezinto zokushisisa ze-brazing Ti, Zr kanye nama-alloys azo. Izisetshenziswa ezine-graphite eveziwe njengezici zokushisisa akufanele zisetshenziselwe ukugwema ukungcoliswa kwekhabhoni. I-Brazing fixation izokwenziwa ngezinto eziqinile ezinamandla ezinga lokushisa eliphezulu, i-coefficient yokunweba okushisayo efanayo ku-Ti noma i-Zr, kanye nokuphinda kusebenze okuphansi ngensimbi eyisisekelo.
Isikhathi sokuthumela: Jun-13-2022