In this paper, a new route is introduced to fabricate parts with increased wear and impact resistance for use in tunneling and mining applications. A combination of selective laser melting (SLM) and spark plasma sintering (SPS) to 3D print functionally graded lattices (FGL) that are later filled with metal-diamond composites was used. It was demonstrated that a cellular lattice plays an important role in the consolidation of diamond particles. Impact-abrasive laboratory experiments with tribological device, developed in-house, were carried out to characterize the fabricated samples. The results show that the balance of nickel, molybdenum, and chromium significantly affects the performance of the fabricated specimens. The addition of a higher content of MoCr, Ni and coated diamond particles guarantees higher impact-abrasive resistance of the composite. Our experimental results show that the FGL structure allows a more accurate distribution of diamond particles (variable metal/refractory material content) across the structure and our finite element simulations showed increased ductility and impact absorption ability due to a more uniform distribution of stresses throughout the volume.

在本文中，引入了一条新的路线来制造具有更高耐磨性和抗冲击性的零件，用于隧道和采矿应用。使用选择性激光熔化（SLM）和火花等离子体烧结（SPS）到3D打印功能梯度晶格（FGL）的组合，这些晶格随后填充有金属金刚石复合材料。已经证明，蜂窝状晶格在金刚石颗粒的固结中起重要作用。内部开发的具有摩擦学装置的冲击磨料实验室实验用于表征所制造的样品。结果表明，镍，钼和铬的平衡会显着影响所制备试样的性能。添加更高含量的钼Cr，Ni和涂层金刚石颗粒可确保复合材料具有更高的抗冲击磨损性。我们的实验结果表明，FGL结构可使金刚石颗粒（可变的金属/耐火材料含量）在整个结构中分布更准确，而我们的有限元模拟结果表明，由于整个体积中应力的分布更加均匀，延展性和冲击吸收能力增强了。