CuSn预合金对金属粉末选区激光烧结过程及烧结体质量的影响  

Influence of Pre-alloyed CuSn on Selective Laser Sintering Process and Sintered Quality of Metallic Powder

作　　者：沈以赴[1] 顾冬冬[1] 陈文华[1] 杨家林[2] 王洋[2] 

机构地区：[1]南京航空航天大学材料科学与工程系,江苏南京210016 [2]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《航空学报》2005年第6期768-773,共6页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金委员会-中国工程物理研究院联合基金(10276017);航空科学基金(04H52061);南京航空航天大学科研创新基金(S0403-061)资助项目

摘　　要：研究了CuSn预合金对Cu基金属粉末和Ni基金属粉末选区激光烧结的影响。结果表明,对于Cu-CuSn-CuP和Ni-CuSn-CuP两类合金粉末,通过合理控制激光工艺参数(特别是激光功率和扫描速率),能顺利实现粉末烧结成形,且无明显的“球化”效应和翘曲变形。对于Cu-CuSn-CuP合金,由于结构金属Cu的熔点相对较低,在一定的工艺条件下,可以通过调整CuSn的配比,得到致密的显微组织均匀的烧结件;而对于Ni-CuSn-CuP合金,结构金属Ni的熔点相对较高,虽然也可以得到较为致密的烧结件,但其微观组织存在明显的不均匀性。The influence of pre-alloyed CuSn on selective laser sintering of Cu-based and Ni-based metal powder is investigated. The experimental results demonstrate that choosing suitable processing parameters, especially laser power and scan speed, can lead to a sound sintered quality of Cu-CuSn-CuP and Ni-CuSn-CuP powder systems with minimal “bailing” effect and curling deformation. Since the melting point of the structural metal Cu is close to that of CuSn, the high densification of Cu-CuSn-CuP powder system with homogenous microstructure can be achieved by means of using feasible processing conditions and suitable content of the binder CuSn. The sufficient densification of Ni-CuSn-CuP powder system is also obtained, however, the microstructure demonstrates to be heterogeneous since the melting point of Ni is much higher than that of pre-alloyed CuSn.

关 键 词：特种加工工艺 选区激光烧结 CuSn预合金 Cu基金属粉末 Ni基金属粉末 

分 类 号：V261.8[航空宇航科学与技术—航空宇航制造工程]