Extended Qualification of CuCr1Zr for the LBM Process
Laser beam melting(LBM)is an Additive Manufacturing powder bed based laser fusion process of metals.It offers tremendous advantages such as feature-integration of cooling channels or lattice structures for lightweight design.Further advantages in production are the possibility to manufacture individually designed products at reasonable costs and reduction of production time in small and medium batch sizes.However,the number of qualified materials for a LBM-application is still limited.Therefore,the qualification of new alloys is one of the main focuses in R&D-activities regarding the LBM process.Parameter studies on density,mechanical properties and surface quality of the test parts are essential for the qualification process.CuCr1Zr is a promising copper alloy with outstanding mechanical and technological characteristics like high strength and high electrical conductivity for applications in tool and mold making,electronics and energy industries.However,this alloy is still not a standard material in the portfolios of LBM service providers,because of its high thermal conductivity and reflectivity.Latest research at the IWF of TU Berlin led to error-free parts which were successfully tested in tool coils for an electromagnetic forming process.The qualification and the optimization of process parameters which increased the density of the parts are the focus of this paper.By using a comparative low laser power of 350 W for this material,it was possible to achieve a relative part density of 99.9%.Furthermore,the characterization of the inner and outer surface quality,shape and dimensional accuracy of the produced parts including their post-processing are presented.
Additive Manufacturing Laser Beam Melting (LBM) Selective Laser Melting (SLM) LBM Material qualification LBM Surface quality Copper alloy CuCr1Zr
Uhlmann Eckart Kashevko Vasy
Institute for Machine Tools and Factory Management(IWF),Technische Universit(a)t Berlin Pascalstraβe 8-9,PTZ 1,10587 Berlin,Germany
国际会议
北京
英文
1673-1682
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）