Brazing na Aluminum Matrix Composites

(1) Brazing halayen aluminum matrix composites yafi hada da barbashi (ciki har da whisker) ƙarfafawa da fiber ƙarfafa.Abubuwan da ake amfani da su don ƙarfafawa sun haɗa da B, CB, SiC, da dai sauransu.

Lokacin da abubuwan haɗin matrix na aluminium suka kasance masu ƙarfi da zafi, matrix Al yana da sauƙin amsawa tare da lokacin ƙarfafawa, kamar saurin yaɗuwar Si a cikin ƙarfen filler zuwa ƙarfe na tushe da samuwar juzu'in jujjuyawa.Saboda babban bambance-bambance a cikin madaidaicin faɗaɗa madaidaiciya tsakanin Al da lokacin ƙarfafawa, dumama brazing mara kyau zai haifar da damuwa na thermal a cikin mahaɗin, wanda ke da sauƙin haifar da fashewar haɗin gwiwa.Bugu da kari, daurin da ke tsakanin karfen filler da lokacin karfafawa ba shi da kyau, don haka dole ne a kula da saman brazing na abin da aka hada ko kuma a kunna karfen filler, kuma a yi amfani da injin brazing gwargwadon iyawa.

(2) Brazing abu da tsari B ko SiC barbashi ƙarfafa aluminum matrix composites za a iya brazed, da kuma surface jiyya kafin waldi za a iya yi ta sandpaper nika, waya goga tsaftacewa, alkali wanka ko electroless nickel plating (shafi kauri 0.05mm).Ƙarfe na filler shine s-cd95ag, s-zn95al da s-cd83zn, waɗanda aka yi zafi da harshen wuta mai laushi oxyacetylene.Bugu da ƙari, ana iya samun ƙarfin haɗin gwiwa mai girma ta hanyar goge brazing tare da solder s-zn95al.

Za a iya amfani da brazing Vacuum don haɗin Short Fiber Reinforced 6061 aluminum matrix composites.Kafin brazing, farfajiyar za ta kasance ƙasa tare da takarda abrasive 800 bayan an yi niƙa, sa'an nan kuma a sanya shi a cikin tanderun bayan tsabtace ultrasonic a cikin acetone.Al Si brazing filler karfe ne da aka fi amfani dashi.Domin hana yaduwar Si a cikin gindin karfe, za a iya lulluɓe wani Layer na tsantsa mai shingen shinge na aluminum a saman brazing na kayan da aka haɗa, ko b-al64simgbi (11.65i-15mg-0.5bi) ƙarfe mai cike da brazing tare da ƙananan ƙarfin brazing za a iya zaɓar.Matsakaicin zafin jiki na narkewar ƙarfe mai cike da brazing shine 554 ~ 572 ℃, zazzabi na brazing na iya zama 580 ~ 590 ℃, lokacin brazing shine 5min, kuma ƙarfin haɗin gwiwa ya fi 80mpa

Domin graphite barbashi ƙarfafa aluminum matrix composites, brazing a cikin m tanderun yanayi ne mafi nasara hanya a halin yanzu.Domin inganta daurin ruwa, dole ne a yi amfani da Al Si solder mai ɗauke da Mg.

Kamar yadda yake tare da ƙyalli na aluminium, ana iya inganta wettability na abubuwan haɗin matrix na aluminum ta hanyar gabatar da tururi na mg ko tsotsawar Ti da ƙara wani adadin Mg.