SLM is a powder bed fusion technology that uses a high-power laser to fully fuse metal powder particles together layer by layer. Parts manufactured by this method have a density close to that of forgings and excellent mechanical properties.

SLM is a powder bed fusion technology that uses a high-power laser to fully fuse metal powder particles together layer by layer. Parts manufactured by this method have a density close to that of forgings and excellent mechanical properties.

Selective Laser Melting SLM is suitable for the manufacture of high-performance components. It is frequently used in aerospace, defense, automotive exhaust systems and piping, motorcycle components, electronic enclosures and housings, drones and robotics, and medical applications.

This technology rivals traditional manufacturing methods. It can achieve a print density of 99.9 per cent with complete fusion of the powder. So, parts manufactured by selective laser melting possess always have an exceptional strength and density.

SLM (Selective Laser Melting) technology is compatible with high-strength alloys such as titanium, aluminium, maraging steel, cobalt chrome, copper, Inconel, stainless steel, etc.

It should be noted that the SLM printing process requires support structures and post-processing (such as heat treatment and surface finishing). For high-volume production requirements (thousands of parts), its production speed is slower than that of binder jetting technology.

Binder Jetting is an additive manufacturing process where a liquid binder is selectively deposited to join metal powder particles together. After printing, the part (called a “green part”) is cured, then sintered in a furnace to fuse the powder into a dense metal object.

Binder Jetting technology is characterized by its high printing speed. It is significantly faster than laser-based methods when printing large parts. Furthermore, no support structures are required, as the parts are printed directly within the powder bed.

It should be noted, however, that parts manufactured by Binder Jetting have lower density and strength than those produced by SLM or DMLS processes. Subsequent sintering is required, and infiltration with another material (such as bronze) may also be necessary. Although the surface finish of parts manufactured by the Binder Jetting process is superior to that of SLM/DMLS processes, post-processing is still required to meet strict tolerance requirements.

DMLS technology is similar to SLM, but the way it works is slightly different. Whilst SLM technology completely melts the powder, DMLS sintered the metal powder at a temperature slightly below its melting point, making the particles to fuse together.

However, most researchers and companies currently regard SLM (Selective Laser Melting) and DMLS (Direct Metal Laser Sintering) as essentially the same technology. Although many leading metal 3D printing manufacturers actually employ SLM technology, they continue to refer to it as DMLS in their webs or ads. To some extent, this is done to avoid potential patent disputes with a specific metal 3D printing company called SLM Solutions.

This situation is like the distinction between FFF (Fused Filament Fabrication) and FDM (Fused Deposition Modelling).

DMLS technology is suitable for manufacturing robust and fully functional parts, making it ideal for end-use parts and functional prototyping. It can process a wide range of metal alloys. Furthermore, this technology is well-suited to complex designs, as its high resolution enables the printing of precise geometries and fine details.

Although DMLS technology has many advantages, it should be noted that, like SLM, DMLS requires support structures and post-processing. Its printing speed is moderate, slower than that of binder jetting. Compared to parts manufactured using SLM, those produced by DMLS may have a slightly higher porosity.

SLM is ideal when part strength, complexity, and material performance are top priorities—such as for aerospace brackets, turbine components, industrial components, or medical implants.

For mass production, binder jetting is the preferable option, particularly for parts that do not require the highest strength. Furthermore, the sintering process can cause significant deformation in medium-sized or large parts.

DMLS is a middle-ground for creating detailed, high-strength parts for functional testing or limited production runs.

At IN3DTEC, we offer both SLM and binder jetting metal 3D printing services. Customers can choose the most suitable process based on the part’s function, material and budget. Whether you are manufacturing prototypes or scaling up to mass production, our engineering team will always be happy to support you.

Email: sales@in3dtec.com
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