Zr 对 DZ38合金凝固行为和持久性能的影响(英文)

材料研究学报, 1993, 7(1): 1-7.

Zr 对 DZ38合金凝固行为和持久性能的影响(英文)

中国科学院金属研究所

基金项目: Supported project by NSFC 9589014-03

关键词：定向凝固 , segregation , stress rupture property

INFLUENCE OF Zr ON THE SOLIDIFICATION BEHAVIOR AND STRESS RUPTURE PROPERTY OF DZ38 SUPERALLOY

LI Ying'ao TANG Yajun ZHANG Jinghua ZHANG Jishan ZHU Yaoxiao HU Zhuangqi (Institute of Metal Research , Academia Sinica) , null , null , null , null

Keywords： directional solidification , 合金偏析 , 持久性能

研究了普通定向凝固DZ38高温合金中,Zr 含量对DZ38合金凝固行为和持久性能的影响。结果表明,微量元素Zr 严重影响合金的凝固偏析,Zr 含量超过0.03wt-%时,合金中γ+γ′共晶的析出最明显增加,合金偏析严重,因而降低了合金的初熔和终凝温度;降低Zr 含量,合金的持久寿命明显提高,特别是无Zr 合金的横向持久性能比普通DZ38(含0.057wt-%Zr)合金提高一倍以上。

An investigation has been made of the effect of Zr on the solidification behavior and stressrupture property in a directionally solidified DZ38 superalloy with extremely lower content of zirconium.The results show that Zr can seriously affect the solidifi

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