铜水冷环表面状态对DD6单晶高温合金组织与性能的影响

乐献刚; 顾欣; 邹建波; 刘艳; 李建国; 马岳

doi:10.15980/j.tzzz.2014.11.005

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铜水冷环表面状态对DD6单晶高温合金组织与性能的影响
Effects of Chill-ring Surface Conditions on Solidification Microstructures and Stress Rupture Behavior of a Single Crystal Superalloy DD6
2014年34卷第11期页码：1136-1139
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.11.005

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[1]乐献刚,顾欣,邹建波,刘艳,李建国,马岳.铜水冷环表面状态对DD6单晶高温合金组织与性能的影响[J].特种铸造及有色合金,2014,34(11):1136-1139.

Yue Xiangang, Gu Xin, Zou Jianbo, et al. Effects of Chill-ring Surface Conditions on Solidification Microstructures and Stress Rupture Behavior of a Single Crystal Superalloy DD6[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1136-1139.
[1]乐献刚,顾欣,邹建波,刘艳,李建国,马岳.铜水冷环表面状态对DD6单晶高温合金组织与性能的影响[J].特种铸造及有色合金,2014,34(11):1136-1139. DOI： 10.15980/j.tzzz.2014.11.005.

Yue Xiangang, Gu Xin, Zou Jianbo, et al. Effects of Chill-ring Surface Conditions on Solidification Microstructures and Stress Rupture Behavior of a Single Crystal Superalloy DD6[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1136-1139. DOI： 10.15980/j.tzzz.2014.11.005.

摘要

以DD6高温合金为目标

研究了铜水冷环内壁表面状态对其凝固组织及持久性能的影响。结果表明

与未处理的光亮铜表面以及自然形成的沉积物水冷环内壁相比

水冷环内壁经过喷C粉处理后

单晶凝固过程中的辐射散热能力得到明显增强

温度梯度得到提高

一次枝晶间距变小

晶体生长方向与[001]偏离度变小

γ-γ′共晶含量降低

尺寸得到细化

使合金的持久性能得到提高。

Abstract

Influences of the chill-ring surface on the microstructures and stress rupture behavior of the DD6 single crystal superalloy were investigated.Through comparing with the shinning copper surface and the deposit surface of the chill-ring

the heat radiation ability can be enhanced with spraying carbon on the chill-ring surface

and the temperature gradient is improved.As a result

the primary dendrite arm spacing is decreased

and the angle between the single crystal growth orientation and the[001]orientation is decreased.In addition

the size and volume fraction ofγ-γ′eutectic are reduced

and the stress rupture behabior of the DD6 alloy is improve greatly.

关键词

DD6单晶高温合金水冷环表面状态辐射散热凝固组织持久性能

Keywords

Single Crystal Superalloy of DD6Surface Condition of Chill-RingHeat RadiationSolidifica-tion MicrostructureStress Property

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隔热挡板厚度对DD6单晶高温合金凝固组织的影响