Development in the microstructure and mechanical properties of as-built TiC-Fe based cermets fabricated through selective laser melting (SLM) adapting pulse shape technique has been studied and is compared after post-treatment process like hot isostatic pressing (HIP). Pulse shaping temporarily distributes the energy uniformly within the single layer of pulses and the laser material exposure can be controlled with controlled energy delivery. For the fabrication of TiC-based cermets, laser beam optimization proves to be an effective fabrication method to produce crack-free cermets. Some porosity may be observed in as-built samples due to a lack of fusion and poor feedstock powder rheology. The maximum hardness and fracture toughness values achieved for the as-fabricated samples are found to be 1020 ± 50 HV and 16.5 ± 1.5 MPa m^1/2. Post-processing treatments such as HIP performed at high temperature and high pressures were adapted, where the hardness decreases (due to microstructural coarsening) and fracture toughness show a marginal increase (due to pore closure).

研究了通过选择性激光熔化（SLM）适应脉冲形状技术制备的TiC-Fe基金属陶瓷的微观结构和力学性能的发展，并在热等静压（HIP）等后处理工艺后进行了比较。脉冲整形将能量暂时均匀地分布在单层脉冲内，并且可以通过受控的能量传输来控制激光材料的曝光。对于 TiC 基金属陶瓷的制造，激光束优化被证明是生产无裂纹金属陶瓷的有效制造方法。由于缺乏融合和原料粉末流变性差，在完工样品中可能会观察到一些孔隙率。制造样品的最大硬度和断裂韧性值被发现为 1020 ± 50 HV 和 16.5 ± 1.5 MPa m^1/2。采用了诸如在高温和高压下进行的 HIP 等后处理处理，其中硬度降低（由于微观结构粗化）和断裂韧性显示出边际增加（由于孔隙闭合）。