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利用Gleeble-1500材料热/力模拟机,研究了电磁搅拌的半固态60Si2Mn在不同的变形温度、变形速率下的变形抗力规律,并与常规铸造的60Si2Mn进行了比较通过对其在固液两相区变形后的外观形貌观察,分析了变形过程中金属的流动规律.研究表明:半固态试样在固液两相区变形时,其变 形抗力明显低于常规铸造的变形抗力,并且随着变形温度的升高,变形抗力降低;随着变形速率的降低,热软化越明显;同时发现,在固液两相区单向压缩时,不可避免地会出现表面裂纹
Using Gleeble-1500 thermal / mechanical simulator, the deformation resistance of semi-solid 60Si2Mn electromagnetic stirrup under different deformation temperature and deformation rate was studied and compared with conventional cast 60Si2Mn. After deformation, the morphology of the area was observed, and the law of metal flow during deformation was analyzed. The results show that the deformation resistance of the semi-solid sample is obviously lower than that of the conventional casting when the solid-liquid two-phase zone is deformed, and the deformation resistance decreases with the increase of the deformation temperature. As the deformation rate decreases, The more obvious; also found that in the solid-liquid two-phase unidirectional compression, surface cracks will inevitably occur