东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (2): 214-216+220.DOI: -

• 论著 • 上一篇    下一篇

Ti对DZ68合金凝固偏析的影响

管秀荣;郑志;刘恩泽;翟玉春;   

  1. 东北大学材料与冶金学院;中国科学院金属研究所;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-02-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50901077)

Effect of titanium on solidification and segregation of DZ68 alloy

Guan, Xiu-Rong (1); Zheng, Zhi (2); Liu, En-Ze (2); Zhai, Yu-Chun (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) Institute of Metal Research, Chinese Acad. of Sci., Shenyang 110016, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-02-15 Published:2013-06-20
  • Contact: Guan, X.-R.
  • About author:-
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摘要： 利用光学显微镜(OM)、电子探针(EPMA)等手段研究了不同Ti含量的DZ68合金的凝固过程和主元素的偏析.结果表明:本实验条件下,随合金中Ti含量的增加,合金的初凝温度和终凝温度逐渐降低,但初凝和终凝的温度区间逐渐增大;Ti含量的增加,促进Ta的正偏析程度,同时也使W的负偏析程度显著增加.为了减少DZ68合金组织中析出的(γ+γ′)共晶,Ti的质量分数应控制在1.7%以下.

关键词: Ti, 高温合金, 凝固, 偏析, (γ+γ′)共晶

Abstract: Solidification and segregation of the major elements in DZ68 alloy with different Ti contents were studied by optical microscopy (OM) and electronic probe micro analysis (EPMA). The results showed that both the temperature of initial solidification and temperature of final solidification decrease gradually but the temperature range of solidification increases gradually with increasing Ti content in alloy under the test conditions. However, the increasing Ti content enhances both the positive segregation of Ta and negative segregation of W obviously. To reduce the (γ+γ′) eutectic in DZ68 alloy, the mass fraction of Ti in alloy should not be more than 1.7%.

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