1. Izinto zokugquma
(1) I-Titanium kunye nee-alloys zayo ezisisiseko azifane zifakwe i-brazing nge-solder ethambileyo. Iintsimbi ze-brazing filler ezisetyenziselwa i-brazing ziquka isiseko sesilivere, isiseko se-aluminium, isiseko se-titanium okanye isiseko se-titanium zirconium.
I-solder esekelwe kwisilivere isetyenziswa kakhulu kwizinto ezinobushushu obusebenzayo obungaphantsi kwama-540 ℃. Amalungu asebenzisa i-solder yesilivere ecocekileyo anamandla aphantsi, kulula ukuwaqhekeza, kwaye ayamelana nokugqwala kakuhle kunye nokumelana ne-oxidation. Ubushushu be-brazing be-solder ye-Ag Cu buphantsi kune-silver, kodwa ukufuma kuncipha ngokunyuka komxholo we-Cu. I-solder ye-Ag Cu equlethe inani elincinci le-Li inokuphucula ukufuma kunye nenqanaba lokudibanisa phakathi kwe-solder kunye ne-base metal. I-solder ye-AG Li ineempawu ze-low melting point kunye ne-reducibility enamandla. Ifanelekile kwi-brazing titanium kunye ne-titanium alloys kwi-atmosphere ekhuselayo. Nangona kunjalo, i-vacuum brazing iya kungcolisa isithando somlilo ngenxa yokuphuma kwe-Li. I-Ag-5al- (0.5 ~ 1.0) Mn filler metal yeyona ntsimbi ikhethwayo kwi-titanium alloy components. I-brazed joint inokumelana ne-oxidation kunye ne-corrosion. Amandla okucheba e-titanium kunye ne-titanium alloy joints abrazed nge-silver base filler metal aboniswe kwiTheyibhile 12.
Itheyibhile 12 iiparameter zenkqubo yokugquma kunye namandla adibeneyo e-titanium kunye ne-titanium alloys
Ubushushu bokugquma kwe-aluminium based solder buphantsi, nto leyo engayi kubangela ukuba kubekho utshintsho lwe-titanium alloy β Phase, nto leyo enciphisa iimfuno zokukhetha izixhobo kunye nezakhiwo ze-brazing fixture. Ukusebenzisana phakathi kwe-filler metal kunye ne-base metal kuphantsi, kwaye ukunyibilika kunye nokusasazwa akubonakali, kodwa i-plasticity ye-filler metal ilungile, kwaye kulula ukuyiqengqa i-filler metal kunye ne-base metal, ngoko ke ifanelekile kakhulu kwi-brazing titanium alloy radiator, isakhiwo se-honeycomb kunye nesakhiwo se-laminate.
Iifluxes ezisekwe kwiTitanium okanye iTitanium zirconium zihlala ziqulathe iCu, Ni kunye nezinye izinto, ezinokusasazeka ngokukhawuleza kwiMatrix kwaye ziphendule kwiTitanium ngexesha lokubraza, nto leyo ebangela ukubola kweMatrix kunye nokwakheka komaleko obuthathaka. Ke ngoko, ubushushu bobraza kunye nexesha lokubamba kufuneka kulawulwe ngokungqongqo ngexesha lokubraza, kwaye akufuneki kusetyenziswe ekubraza izakhiwo ezixineneyo kangangoko kunokwenzeka. I-B-ti48zr48be yiTi Zr solder eqhelekileyo. Inokumanzika okuhle kwiTitanium, kwaye isinyithi esisisiseko asinakho ukukhula kweenkozo ngexesha lokubraza.
(2) Iintsimbi ze-Brazing filler ze-zirconium kunye nee-base alloys I-brazing ye-zirconium kunye nee-base alloys ibandakanya ikakhulu i-b-zr50ag50, i-b-zr76sn24, i-b-zr95be5, njl.njl., ezisetyenziswa kakhulu kwi-brazing yemibhobho ye-zirconium alloy yee-reactors zamandla enyukliya.
(3) I-brazing flux kunye ne-atmosphere protective titanium, zirconium kunye ne-base alloys zinokufumana iziphumo ezanelisayo kwi-vacuum kunye ne-inert atmosphere (helium kunye ne-argon). I-argon ecocekileyo kakhulu mayisetyenziswe kwi-argon shielded brazing, kwaye i-dew point mayibe yi--54 ℃ okanye ngaphantsi. I-flux ekhethekileyo equlethe i-fluoride kunye ne-chloride yesinyithi i-Na, K kunye ne-Li mayisetyenziswe kwi-flame brazing.
2. Itekhnoloji yokurhawula
Ngaphambi kokuba kufakwe ibrashi, umphezulu kufuneka ucocwe kakuhle, ususwe amafutha kwaye kususwe ifilimu ye-oxide. Ifilimu ye-oxide etyebileyo mayisuswe ngendlela yoomatshini, indlela yokuqhumisa isanti okanye indlela yokuhlamba ityuwa enyibilikisiweyo. Ifilimu ye-oxide ethe tyaba ingasuswa kwisisombululo esine-20% ~ 40% ye-nitric acid kunye ne-2% ye-hydrofluoric acid.
I-Ti, i-Zr kunye nee-alloys zazo azivumelekanga ukuba ziqhagamshelane nomphezulu odibeneyo nomoya ngexesha lokufudumeza i-brazing. I-brazing ingenziwa phantsi kokhuselo lwe-vacuum okanye igesi engasebenziyo. Ukufudumala okanye ukufudumeza okuqhutywa rhoqo ngexesha lokukhusela kungasetyenziswa. Ukufudumala okuqhutywa ngokungenisa yeyona ndlela ilungileyo kwiindawo ezincinci ezilinganayo, ngelixa i-brazing kwi-oven iluncedo ngakumbi kwiindawo ezinkulu nezintsonkothileyo.
Izinto zeNi Cr, W, Mo, Ta kunye nezinye izinto kufuneka zikhethwe njengezinto zokufudumeza zebrazing Ti, Zr kunye nee-alloys zazo. Izixhobo ezinegrafiti ebonakalayo njengezinto zokufudumeza aziyi kusetyenziselwa ukuthintela ungcoliseko lwekhabhoni. Izinto zebrazing mazisetyenziswe ngezinto ezinamandla aphezulu obushushu, i-coefficient yokwandisa ubushushu efana neTi okanye iZr, kunye ne-reactivity ephantsi ngesinyithi esisisiseko.
Ixesha lokuthumela: Juni-13-2022