<strong>GH907</strong>合金机匣锻环的超声衰减性能与其组织的关系

doi:10.11901/1005.3093.2023.173

材料研究学报

2024, Vol. 38

Issue (1): 14-22 DOI: 10.11901/1005.3093.2023.173

研究论文

本期目录 | 过刊浏览

GH907合金机匣锻环的超声衰减性能与其组织的关系

吕涛¹^,², 刘芳¹, 刘畅¹, 董德秀³, 张伟红¹, 蔡桂喜¹(

)

1 中国科学院金属研究所沈阳 110016
2 中国科学技术大学材料科学与工程学院沈阳 110016
3 中国航发沈阳黎明航空发动机有限责任公司沈阳 110043

Influence of Microstructure on Ultrasonic Attenuation of Forged GH907 Alloy Ring for Aero Engine Turbine Casing

LV Tao¹^,², LIU Fang¹, LIU Chang¹, DONG Dexiu³, ZHANG Weihong¹, CAI Guixi¹(

)

1 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
3 AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang 110043, China

引用本文:

吕涛, 刘芳, 刘畅, 董德秀, 张伟红, 蔡桂喜. GH907合金机匣锻环的超声衰减性能与其组织的关系[J]. 材料研究学报, 2024, 38(1): 14-22.
Tao LV, Fang LIU, Chang LIU, Dexiu DONG, Weihong ZHANG, Guixi CAI. Influence of Microstructure on Ultrasonic Attenuation of Forged GH907 Alloy Ring for Aero Engine Turbine Casing[J]. Chinese Journal of Materials Research, 2024, 38(1): 14-22.

全文: PDF(12007 KB) HTML

摘要:

采用超声检测和组织分析并将衰减系数量化研究了GH907合金机匣锻环的组织对其超声波衰减性能的影响，并阐述了超声检测中底波损失的原因。结果表明：超声底波成像图中衰减较大区域的形状与GH907合金低倍组织中的黑晶区形状一致；黑晶区的平均晶粒尺寸大于非黑晶区，并有大量呈魏氏组织形貌的ε相；大量ε相的析出使超声衰减增大近40%。应该从细化晶粒、控制晶粒尺寸的均匀性和抑制ε相过量析出三方面优化锻造工艺以提高产品的合格率。

关键词 ：材料检测与分析技术, GH907合金, 机匣锻环, 超声检测, 超声衰减, 组织不均匀

Abstract：

Aiming at the matter of unqualified ultrasonic inspection results of the forged GH907 alloy ring used for aero engine turbine casing, the influence of the microstructure on the ultrasonic attenuation of the forged alloy ring is quantitatively assessed by means of ultrasonic testing and microstructure observation, and the cause of the bottom wave loss observed in ultrasonic testing is elucidated. The results show that the shape of the large attenuated area in the ultrasonic bottom wave amplitude image was consistent with that of the black grain area observed in the macrostructure of GH907 alloy, and the average grain size of the black grain area was larger than that of the non-black grain area, and there were a large number of ε phase with the morphology of Widmannsttten structure. The precipitation of a large number of ε phase can increase ultrasonic attenuation by nearly 40%. It is believed that the forging process should be optimized from the following three aspects: grain refinement, controlling the uniformity of grain size and inhibiting excessive precipitation of ε phase, so that to improve the qualification rate of the forged rings.

Key words： measuring and analysis for materials GH907 alloy casing forged ring ultrasonic testing non-uniform microstructure

收稿日期: 2023-03-13

ZTFLH:

TG115.28

通讯作者: 蔡桂喜，研究员，gxcai@imr.ac.cn，研究方向为材料无损检测与评价

Corresponding author: CAI Guixi, Tel: 13709823129, E-mail: gxcai@imr.ac.cn

作者简介: 吕涛，男，1998年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2023.173 或 https://www.cjmr.org/CN/Y2024/V38/I1/14

表1 GH907合金的化学成分

图1 GH907合金锻环的水浸超声检测模型和A扫描波形示意图

图2 典型不合格GH907合金锻环的超声扫查结果

图3 试样的切取方式和编号示意图

图4 GH907合金锻环试样的底波幅值成像

图5 GH907合金试块的纵截面低倍组织

图6 GH907合金试块的纵截面底波幅值成像

图7 非黑晶区和黑晶区的金相照片

图8 衰减系数与晶粒尺寸的关系

图9 晶粒尺寸及其分布均匀性对超声衰减的影响

图10 GH907合金中非黑晶区和黑晶区显微组织的SEM照片

图11 GH907合金固溶处理前后的组织

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