摘要
分析了直接金属粉末激光烧结中单组元金属粉末、多组元金属粉末和预合金粉末的烧结成形机制;详细讨论了表面张力、粘度、颗粒尺寸及其分布和吸收率/反射率等材料特性以及激光参数、铺粉厚度、保护气氛、粉床预热温度和烧结辅助材料等工艺参数对成形质量的影响;并讨论了直接金属粉末激光烧结的进一步研究方向。
Sintering mechanism of the single-component/multi-component metal powders and the pre-alloyed powders during direct metal laser sintering (DMLS) process was analyzed. The material properties such as surface tension, viscosity, particle size and its distribution, and absorbance/reflectivity together with the processing variables such as laser parameters, layering thickness of powders, atmospheric control, bed pre-heating temperature, and sintering assisted material, which affect sintering and densification of DMLS-processed parts, were discussed. The further directions of the research method in DMLS were addressed.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2004年第5期42-48,共7页
Journal of Materials Engineering
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资助项目 (1 0 2 76 0 1 7)
关键词
直接金属粉末激光烧结
液相烧结
成形机制
材料特性
工艺参数
direct metal laser sintering (DMLS)
liquid phase sintering (LPS)
sintering mechanism
material properties
processing variables
