控制浇注温度制备的半固态ZL101合金的非枝晶组织

Fabrication and Mechanism of Non-dendrite Structure in Semi-solid ZL101 Alloy by Controlled Pouring Temperature

采用控制浇注温度制备半固态ZL101合金,研究了不同的浇注温度对铸造显微组织的影响。结果表明,在680℃浇注时,形成粗大的枝晶组织;在625℃浇注时,获得的显微组织有部分枝晶存在;在615℃浇注时,可获得均匀、近球形的理想的半固态非枝晶组织;而在605℃浇注时,会形成较大晶粒的非枝晶组织。另外,探讨了非枝晶组织的形成机理。

Effects of pouring temperature on non-dendrite structure in as-cast microstructure of semi-solid ZL101 alloy were observed,which was prepared by controlling pouring method.The results reveal that coarse dendritic structure is observed with pouring at 680℃,and partly dendritic structure exists in the microstructure of the alloy with pouring at 625℃,and uniformly spheroidized non-dendrite structure can be obtained in the microstructure of the semi-solid ZL101 alloy with pouring at 615℃,while non-dendrite structure with large grain size can be created in the microstructure at 605℃.In addition,formation mechanism of non-dendrite structure in the microstructure of the semi-solid ZL101 alloy was approached.