ZL101 alloy was treated with different superheating temperatures and holding times by melt superheating technology,and its process characteristics were analyzed by metallographic microanalysis and hardness test.The results showed that the microstructure was the best when the temperature was kept at 820 ° C for 25 min,the α-Al dendrite was fine,and the eutectic Si was short rod or granular and evenly distributed.After melt superheat treatment,the microhardness of ZL101 has been significantly improved.
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