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首页> 外文期刊>Materials science forum >Formation of Cemented Tungsten Carbide Layer with Compositional Gradient Processed by Directed Energy Deposition
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Formation of Cemented Tungsten Carbide Layer with Compositional Gradient Processed by Directed Energy Deposition

机译：通过定向能量沉积形成具有组成梯度的粘合碳化钨层的形成

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In order to partially improve the wear resistance for dies and jigs, layer-forming technologies for adding cemented tungsten carbide is effective way as an additive manufacturing technique. As one of the layer-forming technologies, directed energy deposition (DED) has attracted much attention from industry. However, many cracks are usually observed inside a formed layer processed by the DED due to the difference of material properties between an iron-based substrate and a cladded cemented tungsten carbide layer. In terms of durability of the formed layer, the crack formation is not preferable as well. In this study, as an attempt to suppress the crack initiation and propagation in cladded layers processed by the DED, formation of compositionally graded cemented tungsten carbide layer was performed by inserting a layer with low to medium tungsten carbide content between the substrate and cemented tungsten carbide layer. At first, single layers of cemented tungsten carbide having various tungsten carbide content were formed on iron-based substrates by the DED processing to understand the relationships between the tungsten carbide content and the number of formed cracks. By considering these experimental results, the compositionally graded cemented tungsten carbide layers were optimized. It was revealed that the crack initiation and propagation could be suppressed by compositionally graded cemented tungsten carbide layers.
机译：为了部分改善模具和夹具的耐磨性，用于添加碳水碳化钨的层形成技术是作为添加剂制造技术的有效方式。作为一种层形成技术之一，定向能量沉积（DED）引起了行业的许多关注。然而，由于铁基基板和包覆的粘合的碳化钨层之间的材料特性的差异，通常观察到许多裂缝在由施特的成形层内观察到。就所形成层的耐久性而言，裂缝形成也是不可取的。在本研究中，作为抑制由DED处理的粘接层中的裂纹引发和传播的尝试，通过将具有低至中氧化钨碳纤维含量的层和粘合的碳化钨在碳化钨中插入碳化物含量的层，进行组成级碳化钨碳化钨层的形成层。首先，通过DED处理在铁基底物上形成单层具有各种碳化钨含量的碳化钨含量，以了解碳化钨含量与形成裂缝数之间的关系。通过考虑这些实验结果，优化了组合物梯度粘合的碳化钨层。据揭示，可以通过合成级碳酸碳化钨层抑制裂纹引发和繁殖。

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