(中北大学 材料科学与工程学院，太原 030051)
摘 要:
关键字: 钼；铜；复合材料；覆膜钼粉；激光烧结；高温烧结；熔渗
（School of Materials Science and Engineering, North University of China, Taiyuan 030051, China）
Abstract:A novel method for producing Mo-Cu composites part by laser rapid prototyping technology was carried out. Water suspending method was used to prepare polymer-coated molybdenum powder used in selective laser sintering (SLS). The optimization of laser sintering process was experimentally conducted. The post-treatment process of prototyping parts was developed, including debinding, high-temperature sintering and copper melting infiltration. The results show that the optimal parameters are 15 W in laser power, 1 000 mm/s in scanning velocity, 0.1 mm in powder depth and 60 ℃ in preheating temperature. The molybdenum/copper composites samples are obtained, with tensile strength and elongation of molybdenum part of 383.8 MPa and 6.6%, respectively. This method can be used to produce fire-resisting parts of weaponry and aerospace arms.
Key words: Mo; Cu; composites; polymer-coated molybdenum powder; laser sintering; high temperature sintering; melting infiltration
