A study on the additive manufacturing of a high chromium Nickel-based superalloy by extreme high-speed laser metal deposition
A study on the additive manufacturing of a high chromium Nickel-based superalloy by extreme high-speed laser metal deposition
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极高速激光金属沉积增材制造高铬镍基高温合金的研究
DOI：
10.1016/j.optlastec.2020.106504
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发表时间：
2021
影响因子：
5
通讯作者：
Jiang Ju
中科院分区：
文献类型：
--
作者：
Kaiming Wang;Dong Du;Guan Liu;Ze Pu;Baohua Chang;Jiang Ju
镍基高温合金已被广泛用于制造在具有挑战性的环境中使用的飞机和发电机的涡轮机叶片、轮叶和盘。为了满足这些大规模、高性能零件的快速制造要求，近年来，超高速激光金属沉积（EHLMD）技术引起了人们的极大关注。与传统的激光金属沉积（LMD）相比，EHLMD技术可以显著提高效率。同时，凝固条件和所得的显微组织和力学性能也可以显著改变。在这项研究中，高铬高温合金（K648）已添加制造EHLMD首次使用。研究了关键工艺参数及获得的显微组织和力学性能。结果表明，影响EHLMD K648高温合金单道存款高度、宽度和深度的最重要因素分别是送粉速率、激光功率和扫描速度。当激光功率为1400 W、扫描速度为25 m/min、送粉速率为30 g/min时，沉积层的高度和宽度最大。多道多层沉积层的层间区域存在不完全熔合，内部区域存在气孔。柱状晶粒在每个层内的构建方向上生长，而等轴晶粒倾向于在夹层区域中形成。EHLMD K648合金的显微硬度平均值为298.1HV。EHLMD K648高温合金的极限强度略低于锻造GH 648高温合金，但高于常规LMD K648高温合金。
Nickel-based superalloys have been widely used in manufacturing turbine blades, vanes, and discs of aircrafts and power generators that serve in challenging environment. In order to meet the requirements for rapid manufacturing of these large-scale and high-performance components, the extreme high-speed laser metal deposition (EHLMD) technology have attracted great attention in recent years. The EHLMD technology can significantly improve the efficiency compared with conventional laser metal deposition (LMD). Meanwhile, the solidification condition and the resultant microstructures and mechanical properties can also be dramatically changed. In this study, a high chromium superalloy (K648) has been additively manufacturing by using EHLMD for the first time. The key process parameters and the resulted microstructure and mechanical properties are investigated. The results have shown that the most important factors affecting the height, width, and depth of the single-track deposit of EHLMD K648 superalloy are powder feeding rate, laser power, and scanning speed, respectively. The height and the width of the deposits are the largest when the laser power, scanning speed, and the powder feeding rate are 1400 W, 25 m/min, and 30 g/min. There exist some incomplete fusions in the interlayer region and some pores in the interior region of the multi-track-multi-layer deposits. Columnar grains grow in the build direction within each layer, while equiaxed grains tend to form in the interlayer region. The average value of microhardness of EHLMD K648 superalloy is about 298.1 HV. The ultimate strength of EHLMD K648 superalloy is slightly lower than that of the forging GH648 superalloy but higher than that of the conventional LMD K648 superalloy.
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影响因子：
6.2
作者：
Zhenlin Zhang;Yue Zhao;J. Shan;A. Wu;H. Gu;Xin Tang
通讯作者：
Zhenlin Zhang;Yue Zhao;J. Shan;A. Wu;H. Gu;Xin Tang
影响因子：
11
作者：
Li, Zuo;Chen, Jing;Lin, Xin
通讯作者：
Lin, Xin
影响因子：
4.6
作者：
X. Xu;Gaoyang Mi;Yu Luo;P. Jiang;X. Shao;Chunming Wang
通讯作者：
X. Xu;Gaoyang Mi;Yu Luo;P. Jiang;X. Shao;Chunming Wang
影响因子：
11
作者：
Sui, Shang;Chen, Jing;Tan, Hua
通讯作者：
Tan, Hua
激光金属沉积高铬镍基高温合金的显微组织和力学性能
DOI：
10.1016/j.msea.2020.139185
发表时间：
2020-04-07
影响因子：
6.4
作者：
Wang, Kaiming;Du, Dong;Ju, Jiang
通讯作者：
Ju, Jiang