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材料研究学报  2003, Vol. 17 Issue (1): 57-61    
  论文 本期目录 | 过刊浏览 |
A2017半固态合金的半固态扩展成形
温景林; 管仁国;刘相华
东北大学
引用本文:

温景林; 管仁国; 刘相华 . A2017半固态合金的半固态扩展成形[J]. 材料研究学报, 2003, 17(1): 57-61.

全文: PDF(1524 KB)  
摘要: 用单辊搅拌(SRS)实验机进行了A2017合金的半固态凝固实验,研究了A2017半固态合金组织的形成机理.在轧辊剪切力的作用下在轧辊粗糙表面生长初始枝晶, 破碎后形成自由晶,自由晶自由运动和生长形成细小均匀的A2107合金球形组织.在710~750℃内浇注, 可制备出具有细小、均匀球形组织的A2017半固态合金.使用在辊--靴型腔出口处的扩展成形模可实现A2017合金半固态连续扩展成形,使半固态成形与扩展挤压相结合, 通过控制浇注温度得到了表面状态良好的断面尺寸为14 mm×25 mm的A2017扁型材料.用半固态扩展挤压方法得到的材料断裂强度为280 MPa(比国标值提高100 MPa), 延伸率为49%(比标准值提高29%).
关键词 材料合成与加工工艺半固态扩展成形    
Key words
收稿日期: 1900-01-01     
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