+高级检索
ZK60-2Ca镁合金近液相线铸造研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金 (51074207);国家“973”计划课题 (2013CB632203)


Near-Liquidus Casting of ZK60-2Ca Magnesium Alloy
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    用近液相铸造方法制备了ZK60-2Ca半固态坯料。对其组织演变进行了研究,发现由于Zr的特殊细化作用,ZK60-2Ca合金直接获得球形或近球形的组织,无需经过枝晶球化过程。通过用不同冷却速率的铸模浇铸考察了冷却速率对铸造组织的影响,并对近液相铸造时静置时间对微观组织的影响进行了研究。结果表明,随浇铸温度的降低和静置时间延长至60 min,晶粒逐渐细化并趋于均匀,晶粒尺寸达21 mm,且圆度为1.29。随冷却速率的增加,晶粒细化并出现球化趋势。并对组织演变的机理进行了探讨

    Abstract:

    A semi-solid metal ingot of ZK60-2Ca alloy was prepared by near-liquidus casting, and its microstructure evolution was studied. It is found that due to the special refining effect of Zr, ZK60-2Ca alloy directly achieves a spherical or nearly spherical structure, without the process of dendrite spheroidization. The effect of cooling rates on the casting microstructure was also investigated through adopting different moulds with various cooling rates. The effects of holding time on the microstructure of the alloy were also studied. The results indicate that with the casting temperature decreasing and holding time extending to 60 min, the grains are refined and homogenized gradually, the grain size is 21 mm as well as the roundness is 1.29. With a bigger cooling rate, the grains become smaller and spherical. In addition, the evolution mechanism of casting microstructure for near-liquidus casting was discussed

    参考文献
    相似文献
    引证文献
引用本文

乐启炽,曹 婧,张志强,宝 磊,崔建忠. ZK60-2Ca镁合金近液相线铸造研究[J].稀有金属材料与工程,2014,43(7):1616~1620.[Le Qichi, Cao Jing, Zhang Zhiqiang, Bao Lei, Cui Jianzhong. Near-Liquidus Casting of ZK60-2Ca Magnesium Alloy[J]. Rare Metal Materials and Engineering,2014,43(7):1616~1620.]
DOI:[doi]

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2013-07-20
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2014-12-15
  • 出版日期: