Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第18卷    第6期    总第111期    2008年6月

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文章编号:1004-0609(2008)06-1094-06
Mo-Cu复合材料构件激光快速成型工艺
白培康,刘 斌,胡胜亮

(中北大学 材料科学与工程学院,太原 030051)

摘 要:

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。

 

关键词: 钼;铜;复合材料;覆膜钼粉;激光烧结;高温烧结;熔渗

Laser rapid prototyping process of Mo-Cu composites part
BAI Pei-kang, LIU Bin, HU Sheng-liang

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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