【摘要】 采用斜管法流变制浆工艺生产ZL101,获得了符合金属半固态加工要求的细小、近球状的"非枝晶"组织.主要考查了斜管、浇注温度和冷却速度等因素对合金的微观组织形成过程的影响.结果表明,斜管在该工艺中起到了增加形核的作用;采用低温浇注有利于形核,但浇注温度又不能太低,浇注温度为635℃时的效果最佳;冷却速度太快太慢都难以得到合适的微观组织,结晶器的预热温度为560℃时效果最佳.要想得到细小、近球状的"非枝晶"组织,必须有一个合适的冷却规范.更多还原

【Abstract】 Fine near ball nondendritic grain of primary microstructure needed by semi-solid forming was obtained in Preparation of the Rheocasting Slurry by method of cooling slope tube of alloy ZL101.The influences of cooling slope tube,the pour temperature and the cooling speed were investigated.The results show that the cooling slope tube has effect of producing mass (crystals.)The low pour temperature is in favor of producing (crystals,)but pour temperature can’t be too low;the microstructure on demand can’t be obtained when the cooling speed is too quick or too slow.Fine near ball nondendritic grain of primary microstructure needs suitable cooling criterion.更多还原