Unveiling the Additive Manufacturing revolution: Delving into BMT Additive’s innovations with Electron Beam Melting Technology

26 May, 2023

Additive manufacturing, commonly known as 3D printing, has been revolutionizing various industries by enabling the creation of complex and customized objects with unprecedented design freedom. One of the key technologies driving this revolution is electron beam melting (EBM). With its unique capabilities, EBM has become a game-changer in the additive manufacturing landscape, offering huge potential for creating high-quality components.

EBM in Additive Manufacturing

Unleashing the Power of Electron Beam Melting: Electron beam melting technology involves melting metal powder using a focused electron beam. Unlike other additive manufacturing techniques, such as laser-based systems, EBM operates in a vacuum, which minimizes the risk of contamination and oxidation during the manufacturing process. This allows for the production of components with exceptional material properties, high density, and superior structural integrity.

EBM process

Benefits of EBM

1. Speed and Efficiency

EBM technology enables rapid and efficient manufacturing, as the electron beam can melt large volumes of powder at high speeds, significantly reducing production time compared to traditional manufacturing methods.

True multispot melting. There are almost 20 points seem to be melted simultaneously, yet there is only one electron beam source. That's how fast electron beam is, thanks to no moving parts in beam steering

2. Design Freedom

With EBM, complex geometries can be effortlessly created. The layer-by-layer additive process allows for the fabrication of intricate internal structures, lattice designs, and optimized lightweight components, opening up new possibilities for innovative designs.

Integrator, BMT Additive

3. Cost-Effectiveness

By reducing material waste and minimizing the need for post-processing, EBM technology offers cost-effective manufacturing solutions. The ability to produce complex parts in a single process eliminates the need for expensive tooling, reducing overall production costs.

Electron beam melting (EBM) technology involves several key steps in the additive manufacturing process.

Here are the typical steps involved in EBM technology

1. Digital Design: The first step in EBM is to create a digital design of the desired object using computer-aided design (CAD) software. This design serves as the blueprint for the additive manufacturing process.

2. Application development step: We assess the printability of the parts, choose the proper printing orientation, incorporate support structures if necessary, and nest the parts in the build envelope to maximize productivity and part quality.

3. Material Selection: Next, a suitable metal powder material is selected based on the specific requirements of the desired object. EBM supports a wide range of metal alloys, allowing for customization based on desired properties such as strength, durability, or heat resistance.

Photographer: MarinaGrigorivna

4. Powder mixing: We mix fresh and used powder together to create a unique blend for production. Maintaining the quality of the powder material is perhaps the most important aspect and one of our key success factors is our in-house developed powder management system. Thanks to that we almost completely eliminated scrapping used powder, which is very good for resource efficiency. With the powder management system we are also able to tailor the powder quality of the blend according to the quality requirements of the components we produce.

5. Powder Bed Preparation: The EBM process requires a powder bed as the base material. The metal powder is spread evenly across the build platform, creating a thin layer that serves as the foundation for subsequent layers.

6. Preheating: Before the actual melting process begins, the powder bed is preheated to a specific temperature. This helps ensure proper adhesion and fusion of the metal particles during the melting stage. Preheating facilitates a gradual cooling process following the melting phase, leading to optimal material characteristics and reducing the potential for residual stresses within the components.

7. Electron Beam Melting: Once the powder bed is preheated, an electron beam is precisely directed onto the surface of the powder layer. The high-energy electron beam rapidly melts the metal powder, selectively fusing it together according to the digital design.

8. Layer-by-Layer Building: After the first layer is melted and solidified, the build platform is lowered by a predetermined distance to accommodate the next layer. The process is repeated, with each subsequent layer adhering to the previous one, gradually building the object. A build of full height can consist of +5000 layers.

9. Support Structures (Optional): Depending on the complexity and overhangs of the design, support structures may be added during the printing process. These structures provide temporary support to prevent deformation or collapse during the melting and solidification of the metal.

10. Post-Processing: Once the object is fully printed, it may undergo post-processing steps. This can include removing support structures, heat treatment for tailoring material properties or strengthening, surface finishing (such as polishing or sandblasting), and machining for final precision.

11. Inspection and Quality Control: To ensure the integrity and quality of the printed object, it undergoes thorough inspection and quality control measures. This can include dimensional accuracy checks, non-destructive testing, and material analysis to validate its adherence to specifications.

12. Final Product: After successfully completing all the necessary steps, the finished product is ready for use or further integration into larger assemblies or systems.

By following these steps, electron beam melting technology enables the precise and efficient production of complex metal parts using additive manufacturing. The process offers design flexibility, material versatility, and excellent mechanical properties, making it a valuable tool in various industries.

Electron beam melting technology has emerged as a groundbreaking force in additive manufacturing. Its ability to create complex designs, support diverse materials, and deliver high-quality components at an accelerated pace has revolutionized the way we manufacture. With continuous advancements, EBM is reshaping industries and pushing the boundaries