激光金属沉积过程中因科镍合金625与碳化钨之间的晶界相互作用

Grain-Boundary Interaction between Inconel 625 and WC during Laser Metal Deposition.

作者信息

Huebner Jan, Kata Dariusz, Rutkowski Paweł, Petrzak Paweł, Kusiński Jan

机构信息

Faculty of Materials Science and Ceramics, Department of Ceramics and Refractories, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland.

Faculty of Metals Engineering and Industrial Computer Science, Department of Surface Engineering and Materials Characterisation, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland.

出版信息

Materials (Basel). 2018 Sep 21;11(10):1797. doi: 10.3390/ma11101797.

DOI:10.3390/ma11101797

PMID:30248949

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6213095/

Abstract

In this study, the laser metal deposition (LMD) of the Inconel 625⁻tungsten carbide (WC) metal matrix composite was investigated. The composite coating was deposited on Inconel 625 substrate by powder method. A powder mixture containing 10 wt% of WC (5 µm) was prepared by wet mixing with dextrin binder. Coating samples obtained by low-power LMD were pore- and crack-free. Ceramic reinforcement was distributed homogenously in the whole volume of the material. Topologically close-packed (TCP) phases were formed at grain boundaries between WC and Inconel 625 matrix as a result of partial dissolution of WC in a nickel-based alloy. Line analysis of the elements revealed very small interference of the coating in the substrate material when compared to conventional coating methods. The average Vickers hardness of the coating was about 25% higher than the hardness of pure Inconel 625 reference samples.

摘要

在本研究中，对因科镍合金625-碳化钨（WC）金属基复合材料的激光金属沉积（LMD）进行了研究。通过粉末法在因科镍合金625基体上沉积复合涂层。通过与糊精粘结剂湿法混合制备了含有10 wt% WC（5 µm）的粉末混合物。通过低功率激光金属沉积获得的涂层样品无孔隙和裂纹。陶瓷增强相均匀分布在材料的整个体积中。由于WC在镍基合金中的部分溶解，在WC和因科镍合金625基体之间的晶界处形成了拓扑密排（TCP）相。与传统涂层方法相比，元素的线分析表明涂层对基体材料的干扰非常小。涂层的平均维氏硬度比纯因科镍合金625参考样品的硬度高约25%。