Makuch Natalia, Dziarski Piotr, Kulka Michał, Keddam Mourad
Institute of Materials Science and Engineering, Poznan University of Technology, Pl. M.Sklodowskiej-Curie 5, 60-965 Poznan, Poland.
Laboratoire de Technologie des Matériaux, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, BP 32 Bab Ezzouar, Algiers 16111, Algeria.
Materials (Basel). 2021 Sep 8;14(18):5146. doi: 10.3390/ma14185146.
Plasma paste boriding was employed in order to produce the boride layers on Nimonic 80A-alloy. The process was carried out at temperatures of 1023 K, 1073 K and 1123 K for 3, 4 and 6 h in a gas mixture of 50% H-50% Ar. Borax paste was used as a boron source. The microstructure of the produced surface layers consisted of the mixture of nickel borides and chromium borides. The effect of processing temperature and duration on the thickness of the borided layers was observed. The theoretical thicknesses of the borided layers were estimated using an integral diffusion model. A good correlation was obtained between the theoretical (modeled) and experimental depths of the plasma paste borided layers. The boride layers were characterized by a high hardness ranging from 1160 HV to 2132 HV. The multiphase character of the produced layers resulted in differences in hardness. A significant improvement of the wear resistance of the plasma paste borided Nimonic 80A-alloy was observed in comparison with the non-borided alloy.
采用等离子体膏剂硼化工艺在Nimonic 80A合金上制备硼化物层。该工艺在1023 K、1073 K和1123 K的温度下，于50% H - 50% Ar的混合气体中进行3、4和6小时。硼砂膏剂用作硼源。所制备表面层的微观结构由硼化镍和硼化铬的混合物组成。观察了加工温度和持续时间对硼化层厚度的影响。使用积分扩散模型估算硼化层的理论厚度。在等离子体膏剂硼化层的理论（模拟）深度和实验深度之间获得了良好的相关性。硼化物层的硬度很高，范围为1160 HV至2132 HV。所制备层的多相特性导致硬度存在差异。与未硼化的合金相比，观察到等离子体膏剂硼化的Nimonic 80A合金的耐磨性有显著提高。
