(1) Izici ze-Brazing izinhlanganisela ze-aluminiyamu matrix ikakhulukazi zihlanganisa izinhlayiyana (kuhlanganise nentshebe) ukuqinisa kanye nokuqinisa ifayibha. Izinto ezisetshenziselwa ukuqinisa ikakhulukazi zihlanganisa B, CB, SiC, njll.
Lapho izinhlanganisela ze-aluminum matrix zigaywa futhi zishiswa, i-matrix Al kulula ukusabela ngayo ngesigaba sokuqinisa, njengokusabalaliswa okusheshayo kwe-Si ensimbi yokugcwalisa kusisekelo sensimbi kanye nokwakheka kongqimba lokulahla oluphukayo. Ngenxa yomehluko omkhulu ku-coefficient yokunwetshwa komugqa phakathi kwe-Al kanye nesigaba sokuqinisa, ukushisisa kwe-brazing okungalungile kuzodala ukucindezeleka okushisayo kusixhumi esibonakalayo, okulula ukubangela ukuqhekeka okuhlangene. Ukwengeza, ukumanzisa phakathi kwensimbi yokugcwalisa kanye nesigaba sokuqinisa akulungile, ngakho-ke indawo yokubopha yenhlanganisela kufanele iphathwe noma isebenze insimbi yokugcwalisa kufanele isetshenziswe, futhi i-vacuum brazing kufanele isetshenziswe ngangokunokwenzeka.
(2) Izinto zokubhoda kanye nenqubo engu-B noma ye-SiC eqiniswe yizinhlayiyana ze-aluminium matrix zingaba nge-brazed, futhi ukwelashwa okungaphezulu ngaphambi kokushiselwa kungenziwa ngokugaya nge-sandpaper, ukuhlanzwa kwebhulashi locingo, ukuwashwa kwe-alkali noma i-electroless nickel plating (ugqinsi lwe-coating 0.05mm). I-filler metal i-s-cd95ag, s-zn95al kanye ne-s-cd83zn, eshiswa ilangabi elithambile le-oxyacetylene. Ngaphezu kwalokho, amandla ahlangene aphezulu angatholakala ngokukhuhla i-brazing nge-s-zn95al solder.
I-vacuum brazing ingasetshenziselwa ukuxhunywa kwe-Short Fiber Reinforced 6061 aluminium matrix composites. Ngaphambi kokugqama, indawo engaphezulu kufanele igaywe ngephepha eli-abrasive elingu-800 ngemva kokugaya, bese ligaywa esithandweni ngemva kokuhlanza nge-ultrasonic ku-acetone. I-Al Si brazing filler metal isetshenziswa kakhulu. Ukuze uvimbele ukusakazeka kwe-Si esisekelweni sensimbi, ungqimba oluhlanzekile lwe-aluminium foil barrier layer lungagcotshwa endaweni egqamile yezinto eziyinhlanganisela, noma i-b-al64simgbi (11.65i-15mg-0.5bi) insimbi yokugcwalisa i-brazing enamandla aphansi okubrazi ingakhethwa. Izinga lokushisa elincibilikayo lensimbi yokugcwalisa i-brazing lingama-554 ~ 572 ℃, izinga lokushisa elishisayo lingaba ngu-580 ~ 590 ℃, isikhathi sokubhoboza yi-5min, futhi amandla okugunda okuhlangene makhulu kuno-80mpa.
Ngezinhlayiya ze-graphite eziqinisiwe ze-aluminium matrix composite, ukubasa esithandweni somlilo esivikelayo kuyindlela ephumelela kakhulu okwamanje. Ukuze kuthuthukiswe ukumanzisa, i-Al Si solder equkethe i-Mg kufanele isetshenziswe.
Njengase-aluminium vacuum brazing, ukumanzisa kwezinhlanganisela ze-aluminium matrix kungathuthukiswa kakhulu ngokwethula umhwamuko we-mg noma ukumuncwa kwe-Ti nokwengeza inani elithile le-Mg.
Isikhathi sokuthumela: Jun-13-2022