I-Brazing ye-Beryllium-Copper Alloys

I-Beryllium yethusi inikeza ukumelana nokugqwala okuphezulu, ukuguquguquka kukagesi kanye ne-thermal conductivity, kanye namandla aphezulu kanye nokumelana nokushisa okuphezulu.I-Non-sparking and non-magnetic, iwusizo ezimbonini zezimayini kanye ne-petrochemical.Ngokumelana okuphezulu nokukhathala, ithusi le-beryllium lisetshenziselwa iziphethu, izixhumi nezinye izingxenye ezingaphansi kokulayishwa kwe-cyclical.

I-Brazing beryllium copper ayibizi futhi yenziwa kalula ngaphandle kokwenza buthaka ingxubevange.Ama-alloys e-beryllium-copper atholakala emakilasini amabili: amandla aphezulu e-C17000, i-C17200 ne-C17300;kanye ne-high-conductivity C17410, C17450, C17500 ne-C17510.Ukwelashwa okushisayo kuqinisa ngokwengeziwe lawa ma-alloys.

I-Metallurgy

Amazinga okushisa e-brazing we-beryllium-copper alloys avamise ukuba ngaphezu kwezinga lokushisa eliqinisa iminyaka futhi acishe afane nezinga lokushisa lokulinganisa isixazululo.

Izinyathelo ezijwayelekile zokuphatha ukushisa kwe-beryllium-copper alloys zilandelayo:

Okokuqala, i-alloy kufanele ihlanjululwe.Lokhu kufezwa ngokuncibilikisa ingxubevange ibe yisixazululo esiqinile ngakho izotholakala ngesinyathelo sokuqina kweminyaka.Ngemuva kokufakwa kwesisombululo, ingxubevange ipholiswa ngokushesha ekamelweni lokushisa ngokucisha amanzi noma kusetshenziswa umoya ophoqelekile ezingxenyeni ezincane.

Isinyathelo esilandelayo ukuqina kweminyaka, lapho kwakheka khona izinhlayiya ezicebile nge-beryllium ezincane, eziqinile, ku-matrix yensimbi.Isikhathi sokuguga nezinga lokushisa kunquma inani nokusabalalisa kwalezi zinhlayiya ngaphakathi kwe-matrix.Umphumela uba amandla anda we-alloy.

Amakilasi e-alloy

1. Ithusi le-beryllium elinamandla aphezulu - Ithusi le-Beryllium livame ukuthengwa esimweni sesisombululo-annealed.Lesi sithako siqukethe ukushisa kufika ku-1400-1475°F (760-800°C), okulandelwa ukucisha ngokushesha.I-Brazing ingafezwa ebangeni lokushisa lokulinganisa-isixazululo-okulandelwa ukucisha-noma ngokushisa okushesha kakhulu ngaphansi kwalolu bubanzi, ngaphandle kokuthinta isimo sokufakwa kwesixazululo.Intukuthelo ibe isikhiqizwa ukuguga ku-550-700 ° F (290-370 ° C) amahora amabili kuya kwamathathu.Ngamanye ama-alloys e-beryllium aqukethe i-cobalt noma i-nickel, ukwelashwa kokushisa kungase kuhluke.

2. Ikhopha ye-beryllium ephezulu-conductivity - Ukwakheka okusetshenziswe kakhulu embonini yi-1.9% ye-beryllium-balance copper.Nokho, ingahlinzekwa nge-beryllium engaphansi kuka-1%.Lapho kungenzeka khona, ingxubevange yokuqukethwe kwe-beryllium encane kufanele isetshenziswe ukuze kube nemiphumela engcono kakhulu yokubhula.I-Anneal ngokufudumeza ku-1650-1800°F (900-980°C), okulandelwa ukucisha okusheshayo.Intukuthelo ibe isikhiqizwa ukuguga ku-850-950 ° F (455-510 ° C) ihora elilodwa kuya kwayisishiyagalombili.

Ukuhlanza

Inhlanzeko ibalulekile ukuze uqinise ngempumelelo.Ukuhlanza ngaphambili izindawo ezifakwe i-braze-faying ukususa uwoyela namafutha kubalulekile ekusebenzeni okuhle kokujoyina.Qaphela ukuthi izindlela zokuhlanza kufanele zikhethwe ngokusekelwe kumakhemikhali amafutha noma amafutha;akuzona zonke izindlela zokuhlanza ezisebenza ngendlela efanayo ekususeni wonke amafutha kanye/noma angcolisa amafutha.Khomba ukungcola okungaphezulu, bese uthintana nomkhiqizi ukuthola izindlela zokuhlanza ezifanele.Ukuxubha okune-abrasive noma pickling acid kuzosusa imikhiqizo ye-oxidation.

Ngemuva kokuhlanza izingxenye, gcoba ngokushesha nge-flux ukuze unikeze ukuvikeleka.Uma izingxenye kufanele zigcinwe, izingxenye zingavikelwa nge-electroplate yegolide, isiliva noma i-nickel iye ku-0.0005″ (0.013 mm).Ukucwenga kungasetshenziswa ukwenza lula ukumanziswa kwendawo ye-beryllium-yethusi ngensimbi yokugcwalisa.Kokubili ithusi nesiliva kungase kuhlanganiswe 0.0005-0.001″ (0.013-0.025mm) ukuze kufihlwe ama-oxide okunzima ukumanzisa akhiwa ithusi le-beryllium.Ngemva kokubhula, susa izinsalela eziguquguqukayo ngamanzi ashisayo noma ngokuxubha ngomshini ukuze ugweme ukugqwala.

Ukucabangela Ukuklama

Ukucaciswa okuhlangene kufanele kuvumele i-flux ukuthi ibaleke futhi inikeze ne-capillarity eyanele, kuye ngokuthi ikhemikhali ye-filler-metal ekhethiwe.Ukucaciswa okufanayo kufanele kube ngu-0.0015-0.005″ (0.04-0.127mm).Ukusiza ekususeni ukuguquguquka emajoyintini-ikakhulukazi lezo zakhiwo ezihlanganyelwe ezisebenzisa i-strip efakwe ngaphambili noma ama-strip preforms-ukunyakaza kwendawo eyodwa efaying maqondana nenye kanye/noma ukudlidliza kungase kusetshenziswe.Khumbula ukubala ukucaciswa kwedizayini ehlanganyelwe ngokusekelwe kuzinga lokushisa elilindelekile lokubhula.Ngaphezu kwalokho, i-beryllium coefficient yokunweba ingu-17.0 x 10-6/°C.Cabangela izinhlobo ezibangelwa ukushisa lapho uhlanganisa izinsimbi ezinezakhiwo ezihlukile zokwandisa ukushisa.