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Comparative study of the main properties associated with thin layers of coatings with the cobalt-chromium-tungsten alloy (stellite) and hard chromium plating used as reinforcements for wood sawing
Mechanics of Materials ( IF 3.4 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.mechmat.2020.103637
Jhonattan Trejo , Ramón Tolosa , Néstor Ruiz , Pablo Ninin , Carmen Fuenmayor , Marcos Zambrano , Oriana Palma , Yamid Nuñez

Abstract The objective of this work is to study the possibilities offered by hard chrome plating (HC) as reinforcing coatings of the bandsaws in the sawmill industry, compared to Stellite coatings and wood energetics groups. Therefore, the properties associated with thin layers of the cobalt-chromium-tungsten alloy (Stellite) and HC are studied. The elemental chemical composition and the microstructure are determined by dispersed energy spectrometry and metallographic analysis, respectively. The mechanical properties like microhardness ( H v ), the modulus of elasticity ( E ), and tribological performance are evaluated utilizing Vickers and Knoop microindentations and pin-on-disk tests. The microhardness of the HC coatings is 24% higher, but its modulus of elasticity is 21% lower compared to the Stellite coatings, finding highly significant statistical differences. The HC has a Higher Coefficient of Friction (COF) and a higher specific wear rate than the Stellite coatings. The results concerning the values of the energetics groups of the woods demonstrate that the hardness of Group VI (higher hardness and density) represents only 1.3% and 1.7% of the microhardness of the Stellite and HC coatings respectively, and less than 1% compared to the modulus of elasticity of both coatings. This implies that there is a very low probability of incurring permanent deformation of the coatings due to the resistance to the wood to be penetrated. Based on the above, it is shown that hard chrome plating can be an interesting technique and application for the sawmill industry, especially for the longest bandsaws.

中文翻译:

与用作木材锯切增强材料的钴铬钨合金(司太立)和硬铬镀层薄层相关的主要性能的比较研究

摘要 这项工作的目的是研究与司太立涂层和木材能量学组相比,硬铬镀层 (HC) 作为锯木厂带锯增强涂层的可能性。因此,研究了与钴铬钨合金 (Stellite) 和 HC 薄层相关的特性。元素化学成分和微观结构分别通过分散能谱和金相分析确定。利用维氏和努氏显微压痕以及销钉盘测试来评估显微硬度 (H v )、弹性模量 ( E ) 和摩擦学性能等机械性能。与司太立涂层相比,HC 涂层的显微硬度高 24%,但其弹性模量低 21%,发现非常显着的统计差异。与司太立涂层相比,HC 具有更高的摩擦系数 (COF) 和更高的比磨损率。关于木材能量组值的结果表明,VI 组的硬度(更高的硬度和密度)分别仅占司太立和 HC 涂层显微硬度的 1.3% 和 1.7%,与 HC 涂层相比不到 1%。两种涂层的弹性模量。这意味着由于对要穿透的木材的抵抗力,涂层发生永久变形的可能性非常低。综上所述,镀硬铬对于锯木业是一项有趣的技术和应用,尤其是对于最长的带锯。与司太立涂层相比,HC 具有更高的摩擦系数 (COF) 和更高的比磨损率。关于木材能量组值的结果表明,VI 组的硬度(更高的硬度和密度)分别仅占司太立和 HC 涂层显微硬度的 1.3% 和 1.7%,与 HC 涂层相比不到 1%。两种涂层的弹性模量。这意味着由于对要穿透的木材的抵抗力,涂层发生永久变形的可能性非常低。综上所述,镀硬铬对于锯木业是一项有趣的技术和应用,尤其是对于最长的带锯。与司太立涂层相比,HC 具有更高的摩擦系数 (COF) 和更高的比磨损率。关于木材能量组值的结果表明,VI 组的硬度(更高的硬度和密度)分别仅占司太立和 HC 涂层显微硬度的 1.3% 和 1.7%,与 HC 涂层相比不到 1%。两种涂层的弹性模量。这意味着由于对要穿透的木材的抵抗力,涂层发生永久变形的可能性非常低。综上所述,镀硬铬对于锯木业是一项有趣的技术和应用,尤其是对于最长的带锯。关于木材能量组值的结果表明,VI 组的硬度(更高的硬度和密度)分别仅占司太立和 HC 涂层显微硬度的 1.3% 和 1.7%,与 HC 涂层相比不到 1%。两种涂层的弹性模量。这意味着由于对要穿透的木材的抵抗力,涂层发生永久变形的可能性非常低。综上所述,镀硬铬对于锯木业是一项有趣的技术和应用,尤其是对于最长的带锯。关于木材能量组值的结果表明,VI 组的硬度(更高的硬度和密度)分别仅占司太立和 HC 涂层显微硬度的 1.3% 和 1.7%,与 HC 涂层相比不到 1%。两种涂层的弹性模量。这意味着由于对要穿透的木材的抵抗力,涂层发生永久变形的可能性非常低。综上所述,镀硬铬对于锯木业是一项有趣的技术和应用,尤其是对于最长的带锯。与两种涂层的弹性模量相比小于 1%。这意味着由于对要穿透的木材的抵抗力,涂层发生永久变形的可能性非常低。综上所述,镀硬铬对于锯木业是一项有趣的技术和应用,尤其是对于最长的带锯。与两种涂层的弹性模量相比小于 1%。这意味着由于木材被穿透的阻力,涂层发生永久变形的可能性非常低。综上所述,镀硬铬对于锯木业是一项有趣的技术和应用,尤其是对于最长的带锯。
更新日期:2021-01-01
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