Due to their superior wear and oxidation resistance, Stellite™ coatings are widely used in industrial applications, where the coatings are exposed to high temperature. Common processes for applying Stellite™ coatings include the high-velocity oxy-fuel spraying, laser cladding, and plasma transferred arc welding. Although Stellite™ welding consumables or similar welding consumables in the form of cored wires (CoCr base without industrial property rights) are commercially available, there are hardly any studies on arc-sprayed Stellite™ coatings available in the literature. In this study, the microstructural characteristics of arc-sprayed deposits were investigated, which were produced using a CoCr-based cored wire with addition of 4.5 wt.% tungsten. The produced deposits were examined in its as-sprayed state as well as after exposed to elevated temperatures. The microstructure was scrutinized by means of electron microscopy, energy-dispersive x-ray spectroscopy, as well as x-ray diffraction analyses using synchrotron radiation. Tribo-mechanical tests were conducted in order to assess the performance of the arc-sprayed coating. The findings were discussed and compared to those obtained from conventional CoCr-based coatings. It was found that the arc-sprayed CoCr-based coating is predominantly composed of Co-rich, Cr-rich lamellae or lamellae comprising a Co(Cr)-rich solid solution interspersed with various oxides between the individual lamellae. Solid solution hardening serves as dominant strengthening mechanism, while precipitation hardening effects are hardly evident. With regard to the oxidation behaviour, the as-sprayed coating mainly contains CoCr₂O₄ as well as traces of Co₃O₄. For heating above 550 °C, coating surface additionally consists of Fe₂O₃ and Co₃O₄. In dry sliding experiments, the arc-sprayed CoCr-based coating shows a decreased wear resistance compared to CoCr-based coatings processed by HVOF and PTA, whereas the coefficient of friction (COF) sliding against alumina was similar to the COF observed for the HVOF-sprayed CoCr-based coating, but lower than the COF obtained for the CoCr-based hardfacing alloy deposited by PTA.

由于其卓越的耐磨性和抗氧化性，Stellite™ 涂层广泛用于涂层暴露于高温的工业应用中。应用 Stellite™ 涂层的常见工艺包括高速氧燃料喷涂、激光熔覆和等离子转移弧焊。尽管 Stellite™ 焊接材料或类似的焊丝形式的焊接材料（无工业产权的 CoCr 基）已在市场上销售，但文献中几乎没有关于电弧喷涂 Stellite™ 涂层的研究。在这项研究中，研究了电弧喷涂沉积物的微观结构特征，该沉积物是使用添加 4.5 wt.% 钨的 CoCr 基包芯焊丝生产的。所产生的沉积物在其喷涂状态以及暴露于高温后进行检查。通过电子显微镜、能量色散 x 射线光谱以及使用同步辐射的 x 射线衍射分析来仔细检查微观结构。为了评估电弧喷涂涂层的性能，进行了摩擦机械测试。对这些发现进行了讨论，并与从传统 CoCr 基涂层中获得的发现进行了比较。已发现，电弧喷涂的 CoCr 基涂层主要由富含 Co、富含 Cr 的薄片或包含在各个薄片之间散布有各种氧化物的富含 Co(Cr) 的固溶体的薄片组成。固溶强化为主要强化机制，而析出强化效果不明显。₂ O ₄以及痕量的Co ₃ O ₄。对于 550 °C 以上的加热，涂层表面还包含 Fe ₂ O ₃和 Co ₃ O ₄。在干式滑动实验中，电弧喷涂的 CoCr 基涂层与 HVOF 和 PTA 处理的 CoCr 基涂层相比，耐磨性降低，而与氧化铝滑动的摩擦系数 (COF) 与 HVOF 观察到的 COF 相似- 喷涂 CoCr 基涂层，但低于通过 PTA 沉积的 CoCr 基堆焊合金获得的 COF。