Microstructure and properties of K648 superalloy additively manufactured by extreme high-speed laser metal deposition

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Transactions of Nonferrous Metals Society of China Pub Date : 2024-07-01 DOI:10.1016/S1003-6326(24)66534-9

Kai-ming WANG , Wei LIU , Dong DU , Bao-hua CHANG , Guan LIU , Yong-le HU , Yong-gang TONG , Ming-jun ZHANG , Jian ZHANG , Jiang JU

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Abstract

In order to improve the manufacturing efficiency of high-chromium superalloys, an innovative extreme high- speed laser metal deposition (EHLMD) process was used. The growth behavior of precipitated phases, high-temperature mechanical properties, wear resistance, and corrosion resistance of EHLMD K648 superalloy were investigated and compared with conventional laser metal deposition (CLMD) using transmission electron microscope, tensile tester, wear tester and electrochemical workstation, respectively. The results reveal that the precipitated phase size in EHLMD K648 superalloy is significantly smaller than that in CLMD K648 superalloy. Moreover, EHLMD K648 superalloy demonstrates higher tensile strength at 700 °C, superior wear resistance, and excellent corrosion resistance compared to CLMD K648 superalloy. Consequently, the K648 superalloy manufactured through EHLMD technique exhibits favorable comprehensive properties.

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利用极高速激光金属沉积技术添加制造的 K648 超合金的微观结构和性能

为了提高高铬超级合金的制造效率，采用了一种创新的极高速激光金属沉积（EHLMD）工艺。分别使用透射电子显微镜、拉伸试验机、磨损试验机和电化学工作站对 EHLMD K648 超合金的析出相生长行为、高温力学性能、耐磨性和耐腐蚀性进行了研究，并与传统激光金属沉积（CLMD）工艺进行了比较。结果表明，EHLMD K648 超级合金的析出相尺寸明显小于 CLMD K648 超级合金。此外，与 CLMD K648 超耐热合金相比，EHLMD K648 超耐热合金在 700 °C 时具有更高的拉伸强度、更优越的耐磨性和出色的耐腐蚀性。因此，通过 EHLMD 技术制造的 K648 超级合金具有良好的综合性能。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.