保温时间对宽间隙钎焊 K417G 超合金接头界面演变和机械强度的影响

IF 2.4 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Welding in the World Pub Date : 2024-08-26 DOI:10.1007/s40194-024-01828-z

Xinyu Ren, Hao Wang, Wenwen Li, Qi Dong, Bo Chen, Wei Mao

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引用次数: 0

摘要

K417G 超合金广泛应用于燃气轮机部件，如叶片、叶片和喷嘴。本研究使用 BNi-5 填充合金研究了 K417G 超耐热合金的宽间隙钎焊。钎焊实验在 1150 °C、固定间隙为 0.2 mm 的不同保温时间下进行。对于钎焊 15 分钟的接头，钎缝主要由 γ/γ'相、Ni2Si 和 TiC 相组成。在 950 °C 下测试的平均拉伸强度为 401 MPa。随着保温时间的延长，观察到元素过度扩散现象。因此，Ni2Si 金属间相逐渐嵌入添加剂合金颗粒中。本文讨论了界面演变和断裂行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Effect of holding time on interfacial evolution and mechanical strength of wide-gap brazed K417G superalloy joints

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Effect of holding time on interfacial evolution and mechanical strength of wide-gap brazed K417G superalloy joints

K417G superalloy is widely applied in gas turbine components such as blades, vanes, and nozzles. In this study, wide-gap brazing of K417G superalloy is investigated using BNi-5 filler alloy. The brazing experiment is conducted at 1150 °C for different holding times with the fixed gap of 0.2 mm. For the joints brazed for 15 min, the brazing seam mainly consists of γ/γ’ phase, Ni₂Si and TiC phase. The average tensile strength tested at 950 °C is 401 MPa. As the holding time increased, the excessive element diffusion phenomenon is observed. Hence, Ni₂Si intermetallic phases gradually become embedded in the additive alloy particles. The interfacial evolution and fracture behavior are discussed.

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来源期刊

Welding in the World METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

4.20

自引率

14.30%

发文量

181

审稿时长

6-12 weeks

期刊介绍： The journal Welding in the World publishes authoritative papers on every aspect of materials joining, including welding, brazing, soldering, cutting, thermal spraying and allied joining and fabrication techniques.