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不同制备方法对单晶高温合金取向特征的影响
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西北工业大学凝固技术国家重点实验室,西北工业大学凝固技术国家重点实验室,赣南师范学院,赣南师范学院,赣南师范学院,西北工业大学凝固技术国家重点实验室,西北工业大学凝固技术国家重点实验室


Orientation characteristics of single crystal superalloys under different preparation methods
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State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,Jiangxi Engineering Research Center for Magnesium Alloys,Gannan Normal University,Gan’zhou,Jiangxi Engineering Research Center for Magnesium Alloys,Gannan Normal University,Gan’zhou,Jiangxi Engineering Research Center for Magnesium Alloys,Gannan Normal University,Gan’zhou,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an

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    摘要:

    在高温度梯度定向凝固炉中分别采用选晶法和籽晶法制备单晶高温合金,并采用XRD测定单晶的取向特征。结果表明,采用选晶法制备单晶高温合金时,在激冷板上随机形核的晶粒经过起晶段的竞争生长和螺旋段的选晶作用后,最终获得具有择优取向<001>的单晶。采用籽晶法制备单晶高温合金时,通过重熔籽晶的外延生长,所获得的单晶取向与籽晶取向保持一致。

    Abstract:

    Single crystal superalloys have been prepared by adopting the grain selector and seeding technique in a high temperature gradient directional solidification furnace. The orientation characteristics were measured by XRD. Results indicated that for the grain selector method, the crystal solidification began at the cooling plate with random nucleation, and through mutual competitive growth at the starter block. The grains entered the spiral selector, and finally the single crystal superalloys which were close to <001> direction were obtained. By using the seeding technique, by epitaxial growth of partially melted seed crystals, single crystal superalloys which have the same orientation as the seed crystal were obtained.

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杨初斌,刘林,罗宁,韩宝军,张小联,张军,傅恒志.不同制备方法对单晶高温合金取向特征的影响[J].稀有金属材料与工程,2017,46(4):912~916.[Yang Chubin, Liu Lin, Luo Ning, Han Baojun, Zhang Xiaolian, Zhang Jun, Fu Hengzhi. Orientation characteristics of single crystal superalloys under different preparation methods[J]. Rare Metal Materials and Engineering,2017,46(4):912~916.]
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  • 收稿日期:2014-12-30
  • 最后修改日期:2015-02-05
  • 录用日期:2015-03-25
  • 在线发布日期: 2017-08-04