Influence of Rotational Speed in the Friction Surfacing of Titanium Grade 1 on Ti-6Al-4V

Titanium Grade 1 was deposited on Ti-6Al-4V, 2 mm thickness, by Friction Surfacing. The process parameters were rotational speed, deposition speed and consumption rate. Only the rotational speed was varied in order to evaluate the influence of this parameter on the coatings generated. The applicability of the process has been described for a large number of materials, although the depositions of titanium alloys are still not widely studied. The objective is to investigate the effects of the rotational speed on the coatings' geometry and microstructural evolution. This investigation has shown that Titanium Grade 1 coatings can be deposited onto a Ti-6Al-4V by Friction Surfacing depending on the rotational speed. The coatings' surface homogeneity was influenced by the rotational speed, being inhomogeneous for the lowest speed. The coatings' thickness and width increased with enhancing this speed. The heat affected zone in the substrate corresponded to the complete thickness under the depositions.

采用摩擦堆焊（Friction Surfacing）工艺，在厚度为2mm的Ti-6Al-4V基材表面沉积一级钛材（Titanium Grade 1）。本次实验的工艺参数涵盖转速、沉积速率与耗材进给速率，为探究转速对所制备涂层的影响，本实验仅改变转速参数开展研究。尽管该工艺已被验证可适用于多种材料体系，但钛合金的摩擦堆焊沉积工艺至今仍未得到广泛研究。本研究的核心目标为分析转速对涂层几何形貌与微观组织演变的影响。研究结果表明，通过调控转速，可采用摩擦堆焊工艺在Ti-6Al-4V基材表面成功制备一级钛材涂层；涂层表面均匀性受转速影响显著，低转速工况下涂层表面均匀性较差；随着转速提升，涂层厚度与宽度均随之增大；基材的热影响区范围与沉积层下方的完整基体厚度相一致。