铸造2018，Vol.67Issue(6)：507-511,5.
V对镍基高温合金组织及蠕变性能的影响
Effect of Element V on Microstructure and Creep Property of Nickel-Based Superalloy
曲彦平 1王尊呈 1于兴福1
作者信息
- 1. 沈阳工业大学 材料科学与工程学院,辽宁沈阳 110870
- 折叠
摘要
Abstract
The effect of element V on the microstructure and creep property of the nickel-based superalloy DZ125 was investigated by the observation of microstructure and the test of creep properties. The results show that for the columnar crystal nickel-based superalloys containing higher Ta and Hfelements, when the element V of 0.58% is added, the shape of the precipitated carbides in the as-cast alloy transforms from the slender strips to the particles. After being heat-treated, the slender strip carbides in the alloy free of element V-are dissolved and transformed into the linearly distributed granular particles, while in the alloy containing element V, the carbides are dissolved and their sizes are decreased, furthermore, the number of γ' phase is increased, and the decomposition rate of MC carbides is promoted. Moreover, a needle-like TCP phase began to appear in the alloy containing V after a long term aging at 900 ℃ for 2 000 h. The addition of element V reduces the creep performance of the alloy.关键词
镍基高温合金/元素V/长期时效/蠕变性能Key words
nickel-based superalloy/element V/long term aging/creep property分类
矿业与冶金引用本文复制引用
曲彦平,王尊呈,于兴福..V对镍基高温合金组织及蠕变性能的影响[J].铸造,2018,67(6):507-511,5.
