Al-Mg alloy
Cov yam ntxwv ua tau zoo ntawm Al-Mg aluminium alloy yog: cov khoom siv kho tshuab zoo ntawm chav tsev kub; muaj zog corrosion kuj; tsis zoo casting zog, kev hloov pauv loj hauv cov khoom siv dag zog thiab cov phab ntsa tuab; ntev - siv sij hawm, lub plasticity ntawm cov hlau vim kev laus poob, thiab txawm tawg tshwm sim nyob rau hauv tuag castings; qhov nyiam ntawm kev ntxhov siab corrosion cracking nyob rau hauv tuag castings kuj ntau dua. Qhov tsis zoo ntawm Al-Mg alloy feem cuam tshuam nws qhov zoo, ua rau nws txwv hauv daim ntawv thov.
Al-Zn alloy
Al-Zn aluminium alloy tuag castings tuaj yeem tau txais cov khoom siv kho tshuab siab dua tom qab kev laus. Thaum cov feem ntau ntawm zinc ntau dua 10 feem pua, lub zog tau zoo dua qub. Qhov tsis zoo ntawm cov hlau no yog cov tsis zoo corrosion kuj, nyiam kev ntxhov siab corrosion, thiab yooj yim kub tawg thaum lub sij hawm tuag casting. Feem ntau siv Y401 alloy muaj fluidity zoo thiab yooj yim los sau cov kab noj hniav. Qhov tsis zoo yog tias nws muaj lub siab loj los tsim cov pores, thiab thaum cov ntsiab lus ntawm silicon thiab hlau tsis tshua muaj, nws yooj yim rau kub tawg.
Al-Si alloy
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.
