Selective Laser Melting (SLM)
Metal 3D Printing Service

The main differences between SLM (Selective Laser Melting) and other technologies like EBM (Electron Beam Melting) and DMLS (Direct Metal Laser Sintering) are:

1. Full Melting: SLM fully melts the metal powder, whereas DMLS only sinters (partially melts) it.
2. Energy Source: SLM uses a high-power laser, while EBM uses an electron beam.
3. Surface Finish: SLM generally produces a better surface finish and higher accuracy.
4. Build Environment: SLM operates in an inert gas atmosphere, while EBM requires a vacuum.
5. Part Density: SLM can achieve part densities of nearly 100%.

SLM printed parts typically require several post-processing steps:

1. Support Removal: Mechanically cutting or using wire EDM to remove support structures.
2. Heat Treatment: To relieve internal stresses and optimize mechanical properties.
3. Surface Finishing: Including sandblasting, polishing, or electrochemical polishing to improve surface smoothness.
4. Machining: Precision machining for critical features that require tight tolerances.
5. Quality Inspection: Such as dimensional measurement, CT scanning, and mechanical testing to ensure quality.

The mechanical properties of SLM printed parts are often comparable or superior to those made by traditional methods:

1. High Density: SLM parts can achieve over 99.8% density, close to wrought materials.
2. Strength: In certain orientations, the strength of SLM parts can exceed that of cast or forged equivalents.
3. Anisotropy: Due to the layer-by-layer nature, properties can vary by direction, but this can be minimized through process optimization and heat treatment.
4. Fatigue Performance: With proper heat treatment and surface finishing, SLM parts exhibit good fatigue performance.
5. Microstructure: The rapid cooling rates in SLM create unique microstructures that can lead to superior properties.

Metal 3D printing quote = Material Cost + Printing Time Cost + Post-Processing Fees + Other Additional Costs

Feel free to contact us for an accurate quotation.

To get the best results from SLM, consider these design factors:

1. Support Structures: Design with support structure placement and removal in mind.
2. Thermal Stress: Avoid large, solid volumes to minimize heat buildup and potential warping.
3. Overhang Angles: Self-supporting structures generally require an angle greater than 45°.
4. Hole Sizes & Channels: Ensure unmelted powder can be removed, especially from internal channels.
5. Wall Thickness: Minimum wall thickness is typically 0.2-0.4mm, depending on the material.
6. Print Orientation: Consider the orientation of critical surfaces to optimize finish and mechanical properties.
7. Topology Optimization: Use lattice or bionic structures to reduce weight effectively.