Retrofit of an electron beam and powder bed based additive manufacturing machine

选择性电子束熔炼(SEBM)是一种基于粉末床的添加剂制造工艺。SEBM的一个特点是在真空大气中通过电磁线圈将高光束功率和几乎无惯性的光束偏转结合在一起。因此，光束可以非常灵活地用于熔化、加热，在一段时间内还可以用于电子光学成像(ELO)。SEBM特别适合于高性能材料，例如镍基合金或金属间化合物相，特别有趣的是，建筑温度可以达到1100°C，作为申请的改造的一部分，现有的Arcam A2商业系统将配备现代电子枪(6 kW而不是3.0 kW)、完全可访问的控制系统和ELO系统。由于时钟频率提高了200倍(20 MHz而不是100 kHz)，以及改进的波束质量，功率和波束灵活性应该第一次完全可用。集成的ELO系统为坚固、高质量的过程监控以及未来的过程控制提供了技术基础。

Selective electron beam melting (SEBM) is a powder bed-based additive manufacturing process. A characteristic of the SEBM is the combination of high beam power with a virtually inertia-free beam deflection by means of electromagnetic coils in a vacuum atmosphere. As a result, the beam can be used extremely flexibly for melting, heating and, for some time now, also for electron-optical imaging (ELO). The SEBM is particularly suitable for high-performance materials, e.g. Nickel-based alloys or intermetallic phases, particularly interesting because building temperatures up to 1100 ° C can be achievedAs part of the retrofit applied for, an existing Arcam A2 commercial system is to be equipped with a modern electron gun (6 kW instead of 3.0 kW), a fully accessible control system and an ELO system. Thanks to a 200 times higher clock frequency (20 MHz instead of 100 kHz) and improved beam quality, the power and beam flexibility should be fully usable for the first time. The integrated ELO system represents the technological basis for robust, high-quality process monitoring and thus future process control.