Liga ta' Al-Mg
Il-karatteristiċi tal-prestazzjoni tal-liga tal-aluminju Al-Mg huma: proprjetajiet mekkaniċi tajbin f'temperatura tal-kamra; reżistenza qawwija għall-korrużjoni; proprjetajiet fqir tal-ikkastjar, varjazzjonijiet kbar fil-proprjetajiet mekkaniċi u effetti tal-ħxuna tal-ħajt; użu fit-tul-, il-plastiċità tal-liga minħabba l-waqgħa tat-tixjiħ, u anke l-qsim iseħħ f'die castings; it-tendenza tal-qsim tal-korrużjoni tal-istress fid-die castings hija wkoll akbar. L-iżvantaġġi tal-liga Al-Mg jikkumpensaw parzjalment il-vantaġġi tagħha, u jagħmluha limitata fl-applikazzjoni.
Liga ta' Al-Zn
L-ikkastjar tad-die tal-liga tal-aluminju Al-Zn jista 'jikseb proprjetajiet mekkaniċi ogħla wara t-tixjiħ naturali. Meta l-frazzjoni tal-massa taż-żingu tkun akbar minn 10 fil-mija, is-saħħa titjieb b'mod sinifikanti. L-iżvantaġġ ta 'din il-liga huwa reżistenza għall-korrużjoni fqira, tendenza għall-korrużjoni tal-istress, u qsim sħun faċli waqt die casting. Il-liga Y401 użata b'mod komuni għandha fluwidità tajba u hija faċli biex timla l-kavità. L-iżvantaġġ huwa li għandu tendenza kbira li jifforma pori, u meta l-kontenut tas-silikon u l-ħadid huwa baxx, huwa faċli li jkun ikkrekkjat sħun.
Al-liga tas-Si
Because Al-Si aluminum alloy has the characteristics of small crystallization temperature interval, large solidification latent heat of silicon phase in the alloy, large specific heat capacity, and relatively small linear shrinkage coefficient, its casting performance is generally better than other aluminum alloys. Its filling ability is also good, and the tendency of thermal cracking and shrinkage is relatively small. The Al-Si eutectic contains the least amount of brittle phase (silicon phase), and its mass fraction is only about 10 percent , so its plasticity is better than that of other aluminum alloy eutectic, and the remaining brittle phase can be further treated by modification. Improve plasticity. The test also shows that the Al-Si eutectic still maintains good plasticity at the temperature near its freezing point, which is not found in other aluminum alloys. There is often a considerable amount of eutectic in the cast alloy structure to ensure its good casting performance; the increase in the number of eutectic will make the alloy brittle and reduce the mechanical properties, there is a certain contradiction between the two. However, due to the good plasticity of Al-Si eutectic, it can better take into account the requirements of both mechanical properties and casting properties, so Al-Si alloy is currently the most widely used die-casting aluminum alloy.
