Brazing ea Beryllium-Copper Alloys

Beryllium koporo e fana ka khanyetso e phahameng ea kutu, conductivity ea motlakase le conductivity ea mocheso, hammoho le matla a phahameng le ho hanyetsa mocheso o phahameng.E se nang sparking le e seng ea makenete, e na le thuso indastering ea merafo le ea petrochemical.Ka khanyetso e phahameng ea mokhathala, koporo ea beryllium e boetse e sebelisoa bakeng sa liliba, li-connectors le likarolo tse ling tse tlas'a cyclical loading.

Brazing beryllium koporo e batla e theko e tlaase ebile e etsoa habonolo ntle le ho fokolisa motsoako.Li-alloys tsa Beryllium-koporo li fumaneha ka lihlopha tse peli: matla a phahameng a C17000, C17200 le C17300;le high-conductivity C17410, C17450, C17500 le C17510.Phekolo ea mocheso e matlafatsang li-alloys tsena le ho feta.

Metallurgy

Lithempereichara tsa brazing bakeng sa li-alloys tsa beryllium-copper hangata li ka holimo ho mocheso o thata ka lilemo 'me li batla li lekana le mocheso oa tharollo-annealing.

Mehato e akaretsang ea ho phekola mocheso oa beryllium-copper alloys e latela:

Ntlha ea pele, motsoako o lokela ho hlatsuoa.Sena se finyelloa ka ho qhaqha motsoako ka tharollo e tiileng kahoo e tla ba teng bakeng sa mohato oa ho thatafatsa lilemo.Kamora ho kenngoa ha tharollo, motsoako o pholile ka potlako mocheso oa kamore ka ho tima metsi kapa ho sebelisa moea o qobelloang bakeng sa likarolo tse tšesaane.

Mohato o latelang ke ho thatafatsa lilemo, moo likaroloana tse nyenyane tse nyenyane, tse thata, tse nang le beryllium tse ngata li thehoang ka har'a matrix ea tšepe.Nako ea botsofali le mocheso li lekanya boholo le kabo ea likaroloana tsena ka har'a matrix.Sephetho ke matla a eketsehileng a alloy.

Lihlopha tsa Alloy

1. Koporo ea beryllium e matla haholo - koporo ea Beryllium e atisa ho rekoa boemong ba tharollo-annealed.Anneal ena e na le ho futhumatsa ho 1400-1475 ° F (760-800 ° C), e lateloa ke ho tima ka potlako.Brazing e ka finyelloa ebang ke mocheso oa tharollo-annealing-e lateloa ke ho tima-kapa ka ho futhumatsa ka potlako ka tlase ho sebaka sena, ntle le ho ama boemo ba tharollo.Joale bohale bo hlahisoa ke botsofali ho 550-700 ° F (290-370 ° C) bakeng sa lihora tse peli ho isa ho tse tharo.Ka lisebelisoa tse ling tsa beryllium tse nang le cobalt kapa nickel, phekolo ea mocheso e ka fapana.

2. Koporo ea beryllium e phahameng-conductivity - Sebopeho se sebelisoang haholo indastering ke 1.9% beryllium-balance koporo.Leha ho le joalo, e ka fanoa ka beryllium e ka tlase ho 1%.Ha ho khoneha, motsoako o monyenyane oa beryllium o lokela ho sebelisoa bakeng sa liphello tse ntle ka ho fetisisa.Anneal ka ho futhumatsa ho 1650-1800 ° F (900-980 ° C), e lateloa ke ho tima ka potlako.Joale bohale bo hlahisoa ke botsofali ho 850-950 ° F (455-510 ° C) bakeng sa hora e le 'ngoe ho isa ho tse robeli.

Ho hloekisa

Bohloeki ke ba bohlokoa bakeng sa ho atleha ho qhoqha.Ho hloekisa pele libaka tsa braze-faying ho tlosa oli le mafura ho bohlokoa molemong oa ho kopanya hantle.Hlokomela hore mekhoa ea ho hloekisa e lokela ho khethoa ho latela k'hemik'hale ea oli kapa ea mafura;ha se mekhoa eohle ea ho hloekisa e sebetsang ka mokhoa o ts'oanang ho tlosa oli eohle le / kapa litlolo tse silafatsang.Hlalosa litšila tse ka holimo, 'me u ikopanye le moetsi bakeng sa mekhoa e nepahetseng ea ho hloekisa.Ho hlatsoa ka mokhoa o senyang kapa ho khetha acid e tla tlosa lihlahisoa tsa oxidation.

Kamora ho hloekisa likarolo, braze hang-hang ka flux ho fana ka tšireletso.Haeba likarolo li tlameha ho bolokoa, likarolo li ka sireletsoa ka electroplate ea khauta, silevera kapa nickel ho 0.0005 ″ (0.013 mm).Plating e ka sebelisoa ho nolofatsa bokaholimo ba beryllium-koporo ka tšepe ea ho tlatsa.Ka bobeli koporo le silevera li ka tšeloa 0.0005-0.001 ″ (0.013-0.025mm) ho pata li-oxide tse thata ho isa metsi tse entsoeng ke koporo ea beryllium.Ka mor'a ho betsa, tlosa masalla a flux ka metsi a chesang kapa brushing ea mechine ho qoba kutu.

Ho nahanela Moralo

Lits'oants'o tse kopaneng li lokela ho lumella flux ho baleha hape e fane ka capillarity e lekaneng, ho latela k'hemistri ea tšepe e khethiloeng.Litlhaloso tse tšoanang li lokela ho ba 0.0015-0.005″ (0.04-0.127mm).Ho thusa ho tlosa phallo ho tloha manonyeletsong - haholo-holo meralo e kopaneng e sebelisang likhoele tse behiloeng pele kapa li-strip preforms - ho sisinyeha ha karolo e le 'ngoe e oelang ho e 'ngoe le/kapa ho sisinyeha ho ka sebelisoa.Hopola ho bala lipallo bakeng sa moralo o kopaneng ho latela mocheso o lebelletsoeng oa brazing.Ho feta moo, coefficient ea katoloso ea koporo ea beryllium ke 17.0 x 10-6/°C.Nahana ka mefuta e bakoang ke mocheso ha o kopanya litšepe tse nang le thepa e fapaneng ea ho atolosa mocheso.