基于有限元的选择性激光熔化薄壁成型的熔池研究
摘要
本文主要通过有限元研究了选择性激光熔化(Selective Laser Melting,SLM)加工薄壁过程中的热行为。分析了不同扫描速度及激光功率对熔池尺寸的影响,并与实体加工进行了对比。研究发现,熔池的宽度及深度随激光功率的增加而增加,随扫描速度的提高而减小;熔池的长宽比随功率增大和速度的增大而增大。并且发现,实体加工和薄壁加工中,熔池的宽度与深度在同样工艺参数条件下差别不大,但熔池的长宽比有明显差别,薄壁加工长宽比更大,因此更容易发生球化现象。
引文
[1]石广丰,王景梅,宋林森等.薄壁零件的制造工艺研究现状[J].长春理工大学学报(自然科学版),2012,35(1):68-72.
[2]刘继常.激光单道熔覆成形的金属零件壁厚模型的研究[J].材料科学与工艺,2005,13(1):99-102.
[3]王西彬,解丽静.超高速切削技术及其新进展[J].中国机械工程,2002,11(1-2):190-194.
[4]张伟,徐家文.铝合金薄壁整体构件的数控电解加工试验研究[J].电加工与模具,2007,(4):61-63.
[5]Yadroitsev I.,Shishkovsky I.,Bertrand P.,et al.Manufacturing of fine-structured 3D porous filter elements by selective laser melting[J].Applied Surface Science,2009,(255):5523-5527.
[6]Brandner J J,Pfleging W.Microstructure devices generation by selective laser melting[J].Proceedings of SPIE-The International Society for Optical Engineering,2007,(6459):645911-9.
[7]Hauser C,Sutcliffe C,Egan M,et al.Spiral growth manufacturing(SGM)-A continuous additive manufacturing technology for processing metal powder by selective laser melting[J].University of Liverpool,2007,1-12.
[8]Su X,Yang Y,Xiao D,et al.An investigation into direct fabrication of fine-structured components by selective laser melting[J].International Journal of Advanced Manufacturing Technology,2013,64(9-12):1231-1238.
[9]沈显峰.多组元金属粉末直接激光烧结过程数值模拟及烧结区域预测[D].四川大学,2005.
[10]Mills K C.Ti:Ti-6 Al-4 V(IMI 318)[J].Recommended Values of Thermophysical Properties for Selected Commercial Alloys,2002:211-217.
[11]Roberts I A,Wang C J,Esterlein R,et al.A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing[J].International Journal of Machine Tools&Manufacture,2009,49(12):916-923.
[12]Kruth J P,Wang X,Laoui T,et al.Lasers and materials in selective laser sintering[J].Assembly Automation,2003,23(4):357-371.
[13]Yadroitsev I,Gusarov A,Yadroitsava I,et al.Single track formation in selective laser melting of metal powders[J].Journal of Materials Processing Tech,2010,210(12):1624-1631.
[2]刘继常.激光单道熔覆成形的金属零件壁厚模型的研究[J].材料科学与工艺,2005,13(1):99-102.
[3]王西彬,解丽静.超高速切削技术及其新进展[J].中国机械工程,2002,11(1-2):190-194.
[4]张伟,徐家文.铝合金薄壁整体构件的数控电解加工试验研究[J].电加工与模具,2007,(4):61-63.
[5]Yadroitsev I.,Shishkovsky I.,Bertrand P.,et al.Manufacturing of fine-structured 3D porous filter elements by selective laser melting[J].Applied Surface Science,2009,(255):5523-5527.
[6]Brandner J J,Pfleging W.Microstructure devices generation by selective laser melting[J].Proceedings of SPIE-The International Society for Optical Engineering,2007,(6459):645911-9.
[7]Hauser C,Sutcliffe C,Egan M,et al.Spiral growth manufacturing(SGM)-A continuous additive manufacturing technology for processing metal powder by selective laser melting[J].University of Liverpool,2007,1-12.
[8]Su X,Yang Y,Xiao D,et al.An investigation into direct fabrication of fine-structured components by selective laser melting[J].International Journal of Advanced Manufacturing Technology,2013,64(9-12):1231-1238.
[9]沈显峰.多组元金属粉末直接激光烧结过程数值模拟及烧结区域预测[D].四川大学,2005.
[10]Mills K C.Ti:Ti-6 Al-4 V(IMI 318)[J].Recommended Values of Thermophysical Properties for Selected Commercial Alloys,2002:211-217.
[11]Roberts I A,Wang C J,Esterlein R,et al.A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing[J].International Journal of Machine Tools&Manufacture,2009,49(12):916-923.
[12]Kruth J P,Wang X,Laoui T,et al.Lasers and materials in selective laser sintering[J].Assembly Automation,2003,23(4):357-371.
[13]Yadroitsev I,Gusarov A,Yadroitsava I,et al.Single track formation in selective laser melting of metal powders[J].Journal of Materials Processing Tech,2010,210(12):1624-1631.