Gabatarwar Material
High-Silicon aluminum gami ne na binary gami da ya ƙunshi silicon da aluminum, kuma abu ne na sarrafa zafin jiki na ƙarfe. Babban siliki na aluminum gami da siliki zai iya kula da kyawawan kaddarorin silicon da aluminum, baya gurɓata muhalli, kuma ba shi da lahani ga jikin ɗan adam. The yawa na high-Siliki aluminum gami ne tsakanin 2.4 ~ 2.7 g / cm³, da kuma coefficient na thermal fadada (CTE) ne tsakanin 7-20ppm / ℃. Ƙara abun ciki na silicon na iya rage yawa da ƙimar haɓakar zafin jiki na kayan gami. A lokaci guda kuma, babban siliki na aluminum gami yana da kyawawan halayen thermal, ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙaƙƙarfan ƙarfi da tsauri, kyakkyawan aikin plating tare da zinare, azurfa, jan ƙarfe, da nickel, walƙiya tare da madaidaicin mashin ɗin, da mashin daidaitaccen mashin. Kayan marufi ne na lantarki tare da fa'idodin aikace-aikace.
Hanyoyin masana'antu na manyan siliki na aluminum gami da kayan haɗin gwal sun haɗa da abubuwa masu zuwa: 1) narkewa da simintin gyare-gyare; 2) hanyar shiga ciki; 3) foda karfe; 4) hanyar matsi zafi mai zafi; 5) Hanyar sanyaya da sauri / fesa.
Tsarin samarwa
1) Hanyar narkewa da jefawa
Kayan aiki don smelting da hanyar simintin gyare-gyare yana da sauƙi , ƙananan farashi, kuma yana iya gane manyan masana'antun masana'antu, kuma ita ce hanya mafi yawan shirye-shirye don kayan gami.
2) Hanyar impregnation
Hanyar zubar da ciki ta ƙunshi hanyoyi guda biyu: hanyar shigar da matsi da kuma hanyar kutse mara matsi. Hanyar shigar da matsa lamba tana amfani da matsi na inji ko matsa lamban iskar gas don sa ƙarfen tushe ya narke cikin ratar ƙarfafawa.
3) Foda karfe
Ƙarfe na foda shine a tarwatsa wani yanki na foda na aluminum, foda na silicon da kuma ɗaure daidai, haɗawa da siffata foda ta busassun latsawa, allura da sauran hanyoyin, kuma a ƙarshe ya shiga cikin yanayi mai kariya don samar da wani abu mai yawa.
4) Hanyar danna zafi mai zafi
Hanyar latsawa mai zafi tana nufin wani tsari na sintiri wanda ake aiwatar da matsi da matsa lamba a lokaci guda. Its abũbuwan amfãni ne: ①The foda ne mai sauki plastically kwarara da kuma densify; ②Zazzaɓin zafin jiki da lokacin ɓacin rai kaɗan ne; ③Yawan yawa yana da yawa. Tsarin gabaɗaya shine: a ƙarƙashin yanayi mara kyau, ana sanya foda a cikin rami mai ƙura, foda yana zafi yayin da ake matsawa, kuma an samar da ƙaƙƙarfan ƙaƙƙarfan abu da uniform bayan ɗan gajeren lokaci na matsawa.
5) Saurin sanyaya/fasa ajiya
Fasahar ajiya mai saurin sanyaya/fasa fasaha ce mai saurin ƙarfafawa. Yana da fa'idodi masu zuwa: 1) babu macro-segregation; 2) lafiya da uniform equiaxed crystal microstructure; 3) kyakkyawan yanayin hazo na farko; 4) ƙananan abun ciki na oxygen; 5) ingantaccen aikin sarrafa thermal.
Rabewa
(1) Hypoeutectic silicon aluminum gami ya ƙunshi 9% -12% silicon.
(2) Eutectic silicon aluminum gami ya ƙunshi 11% zuwa 13% silicon.
(3) Abubuwan da ke cikin silicon na hypereutectic aluminum gami yana sama da 12%, galibi a cikin kewayon 15% zuwa 20%.
(4) Wadanda ke da abun ciki na siliki na 22% ko fiye ana kiran su manyan siliki na aluminum, wanda 25% -70% sune manyan, kuma mafi girman abun ciki na silicon a duniya zai iya kaiwa 80%.
Aikace-aikace
1) Marufi mai haɗakarwa mai ƙarfi: babban siliki na aluminum gami yana samar da ingantaccen zafi mai zafi;
2) Mai ɗaukar kaya: Ana iya amfani da shi azaman ɗakin zafi na gida don yin abubuwan da aka tsara a hankali;
3) Firam na gani: babban silicon aluminum gami yana ba da ƙarancin haɓaka haɓaka haɓakar thermal, babban ƙarfi da ƙarfin aiki;
4) Gishiri mai zafi: High silicon aluminum gami yana samar da ingantaccen zafi da goyan bayan tsari.
5) Auto sassa: High-silicon aluminum gami abu (silicon abun ciki 20% -35%) yana da kyau kwarai tribological Properties, kuma za a iya amfani da a matsayin ci-gaba mara nauyi lalacewa-resistant abu don amfani a daban-daban sufuri kayayyakin aiki, daban-daban ikon inji, da kuma inji. kayan aiki. , Musamman fasteners da kayan aiki an yi amfani da ko'ina.
High-silicon aluminum gami yana da jerin abũbuwan amfãni irin su kananan takamaiman nauyi, haske nauyi, mai kyau thermal watsin, low thermal fadada coefficient, girma kwanciyar hankali, mai kyau lalacewa juriya, da kuma mai kyau lalata juriya, da aka yadu amfani da Silinda liners, pistons, da rotors na injunan motoci. , Fayafai na birki da sauran kayan.
