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Effects of different heat treatments on the organization and mechanical properties of ADC12 die-casting aluminum alloy

Effects of different heat treatments on the organization and mechanical properties of ADC12 die-casting aluminum alloy

Effects of different heat treatments on the organization and mechanical properties of ADC12 die-casting aluminum alloy



General die-casting aluminum alloy in the heat treatment process often produces bubbling phenomenon, thus forming defects. However, through a certain alloy element ratio and appropriate heat treatment process can avoid the defects, and improve the organizational properties of the alloy.



This paper to ADC12 die-casting aluminum alloy composition as the basis, adding additional 2% and 4% Cu, and different heat treatment process research, to explore the aluminum alloy in the absence of bulging defects in the optimal solution treatment temperature, time, and organization and performance characteristics, with a view to high-performance die-casting aluminum alloys to provide a basis for the actual production.



The following conclusions were drawn after the experiment:


(1) The upper limit of temperature and time for avoiding surface blistering defects of ADC12 die-casting aluminum alloy during heat treatment at high temperature is 490°C/0.25 h. Heat treatment at higher temperature or longer time conditions will result in surface blistering phenomenon.



(2) Adding Cu elements to ADC12 die-casting aluminum alloy and heat treating it at 460-490°C will increase the hardness of the aluminum alloy considerably and improve the blistering defects caused by the high temperature, but its strength will decrease with the increase of Cu content.



(3) Die casting aluminum alloy ADC12 in solid solution treatment, its high temperature strength will be with the solid solution temperature and time increase and the trend of decline. ADC12 aluminum alloy solid solution treatment of the material's high temperature strength is greater than 12.54MPa, you can avoid the occurrence of the phenomenon of surface blistering.



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