Karimbaev Ruslan, Choi Seimi, Pyun Young-Sik, Amanov Auezhan
Department of Fusion Science and Technology, Sun Moon University, Asan 31460, Korea.
Materials (Basel). 2020 Feb 14;13(4):859. doi: 10.3390/ma13040859.
This study introduces a newly developed cladding device, through printing AISI 1045 carbon steel as single and double layers onto American Society for Testing and Materials (ASTM) H13 tool steel plate. In this study, the mechanical and tribological characteristics of single and double layers were experimentally investigated. Both layers were polished first and then subjected to ultrasonic nanocrystal surface modification (UNSM) treatment to improve the mechanical and tribological characteristics. Surface roughness, surface hardness and depth profile measurements, and X-ray diffraction (XRD) analysis of the polished and UNSM-treated layers were carried out. After tribological tests, the wear tracks of both layers were characterized by scanning electron microscopy (SEM) along with energy-dispersive X-ray spectroscopy (EDX). The surface roughness (R and R) of the single and double UNSM-treated layers was reduced 74.6% and 85.9% compared to those of both the as-received layers, respectively. In addition, the surface hardness of the single and double layers was dramatically increased, by approximately 23.6% and 23.4% after UNSM treatment, respectively. There was no significant reduction in friction coefficient of both the UNSM-treated layers, but the wear resistance of the single and double UNSM-treated layers was enhanced by approximately 9.4% and 19.3% compared to the single and double polished layers, respectively. It can be concluded that UNSM treatment was capable of improving the mechanical and tribological characteristics of both layers. The newly developed cladding device can be used as an alternative additive manufacturing (AM) method, but efforts and upgrades need to progress in order to increase the productivity of the device and also improve the quality of the layers.
本研究介绍了一种新开发的熔覆装置，通过将AISI 1045碳钢以单层和双层形式打印到美国材料与试验协会（ASTM）H13工具钢板上。在本研究中，对单层和双层的力学和摩擦学特性进行了实验研究。两层均先进行抛光，然后进行超声纳米晶表面改性（UNSM）处理，以改善力学和摩擦学特性。对抛光层和经过UNSM处理的层进行了表面粗糙度、表面硬度和深度轮廓测量以及X射线衍射（XRD）分析。在摩擦学测试后，通过扫描电子显微镜（SEM）和能量色散X射线光谱（EDX）对两层的磨损轨迹进行了表征。与未处理的原始层相比，经过UNSM处理的单层和双层的表面粗糙度（R和R）分别降低了74.6%和85.9%。此外，单层和双层的表面硬度显著提高，经过UNSM处理后分别提高了约23.6%和23.4%。经过UNSM处理的两层的摩擦系数没有显著降低，但经过UNSM处理的单层和双层的耐磨性分别比单层和双层抛光层提高了约9.4%和19.3%。可以得出结论，UNSM处理能够改善两层的力学和摩擦学特性。新开发的熔覆装置可作为一种替代的增材制造（AM）方法，但需要进一步努力和升级，以提高装置的生产率并改善层的质量。
