管秀荣,郑志,于永泗,刘恩泽,佟健,翟玉春

• 1:沈阳理工大学环境与化学工程学院
• 2:中国科学院金属研究所
• 3:东北大学材料与冶金学院

摘要(Abstract)：

利用电子探针等手段研究了不同Ti含量对DZ68合金凝固过程和偏析的影响。结果表明,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,凝固温度区间逐渐增大。当Ti含量达到0.55%～1.7%之间的某一值时,铸态合金中出现(γ+γ′)共晶,并随Ti含量增加,(γ+γ′)共晶数量增加。随合金中Ti含量的增加,W的负偏析程度显著增加,Cr由正偏析元素逐渐转变成负偏析元素。在终凝前,随合金中Ti含量的增加,凝固前沿固体中的Ti含量随凝固温度下降的平均变化速率增加,而Cr含量随凝固温度下降的平均变化速率下降。

关键词(KeyWords)： 钛;DZ68合金;凝固;偏析;(γ+γ′)共晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50901077)

作者(Author): 管秀荣,郑志,于永泗,刘恩泽,佟健,翟玉春

DOI: 10.13289/j.issn.1009-6264.2010.07.018

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