Mo-Cu复合材料构件激光快速成型工艺

Laser rapid prototyping process of Mo-Cu composites part

开发了一种激光快速成型制备钼铜复合材料的新工艺,采用水悬浮包覆方法制备激光烧结成型用覆膜钼粉,对覆膜钼粉激光烧结成型工艺进行优化实验。对激光烧结成型件的后处理工艺,包括脱脂、高温烧结与熔渗进行了实验研究,制备钼铜复合材料样件。结果表明:激光烧结成型最佳工艺参数如下,激光功率15 W,扫描速度1 000 mm/s,铺粉厚度0.1 mm,预热温度60℃;钼铜复合材料的抗拉强度为383.8 MPa,伸长率为6.6%,可以满足弹箭发动机喷管等高温零部件的实际使用要求。

A novel method for producing Mo-Cu composites part by laser rapid prototyping technology was carded 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.