{"id":3142,"date":"2025-12-03T15:03:56","date_gmt":"2025-12-03T15:03:56","guid":{"rendered":"https:\/\/additium3d.com\/?p=3142"},"modified":"2026-05-18T12:34:58","modified_gmt":"2026-05-18T12:34:58","slug":"fusion-powder-bed-pbf","status":"publish","type":"post","link":"https:\/\/additium3d.com\/en\/blog\/fusion-lecho-de-polvo-pbf\/","title":{"rendered":"Complete guide to Powder Bed Fusion (PBF) 3D printing"},"content":{"rendered":"

In recent years, the powder bed fusion (PBF) 3D printing<\/strong> has established itself as one of the most revolutionary technologies in additive manufacturing. In contrast to more limited 3D printing methods, PBF offers unprecedented design freedom<\/strong>, allows to produce functional parts with geometries impossible to produce by injection moulding or machining<\/strong>, It has opened up new horizons for sectors such as the automotive, aeronautical, medical and industrial sectors.<\/p>\n\n\n\n

At Additium 3D we see it every day: where once there were limitations, today there are real opportunities to manufacture faster, more accurately and without moulds<\/strong>.<\/p>\n\n\n\n

What is powder bed fusion (PBF)?<\/h2>\n\n\n\n

The powder bed fusion<\/strong> (from English Powder Bed Fusion, PBF<\/em>) is a technology of additive manufacturing<\/strong> in which a very thin layer of powdered material (usually polymers, metals or composites) is deposited on a printing platform. Then, a laser or thermal energy source<\/strong> selectively melts the powder in the areas corresponding to the 3D design.<\/p>\n\n\n\n

Layer by layer, the process is repeated until a solid, precise and fully functional part is created.<\/p>\n\n\n\n

Once printing is complete, the unfused powder is removed, which can be reused in future printing, making the process efficient and sustainable<\/strong>.<\/p>\n\n\n\n

What is powder bed fusion 3D printing?<\/h2>\n\n\n\n

When we talk about powder bed fusion 3D printing<\/strong>, The term \"laser technology\" refers to a set of technologies that share the same principle: using heat or laser energy to melt fine dust particles<\/strong> and form a solid piece.<\/p>\n\n\n\n

Among the best known are SLS (Selective Laser Sintering)<\/a><\/strong>, SLM (Selective Laser Melting)<\/strong> y MJF (Multi Jet Fusion)<\/a><\/strong>, all of which are applicable depending on the type of material or precision required.<\/p>\n\n\n\n

This type of 3D printing stands out because no additional brackets required<\/strong> -the powder itself acts as a carrier during manufacture-, which enables the production of complex shapes, internal cavities, lightweight structures and hinged assemblies<\/strong> in a single print.<\/p>\n\n\n\n

\"Reduce<\/figure>\n\n\n\n

How the PBF process works step by step<\/h2>\n\n\n\n

The magic of PBF 3D printing lies in its method: a process that is as precise as it is innovative. See how powder bed fusion works step by step<\/strong> and why it is making a difference in industrial manufacturing.<\/p>\n\n\n\n

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  1. Digital design (CAD):<\/strong> It all starts with the design of the part in CAD software, where every geometrical detail is defined.<\/li>\n\n\n\n
  2. File preparation and parameters:<\/strong> the design is converted into an STL file and print parameters such as layer thickness, temperature or material type are set.<\/li>\n\n\n\n
  3. Dust deposition:<\/strong> a thin layer of material (a few tenths of a millimetre) is spread on the printing platform.<\/li>\n\n\n\n
  4. Selective merger:<\/strong> a laser (or thermal head in the case of the MJF) selectively melts the powder according to the design coordinates.<\/li>\n\n\n\n
  5. Layered repetition:<\/strong> the process is repeated layer by layer until the piece is complete.<\/li>\n\n\n\n
  6. Cooling and dust recovery:<\/strong> On completion, the part is allowed to cool and separated from the unfused powder, which is recycled.<\/li>\n\n\n\n
  7. Post-processing:<\/strong> residues are removed, surfaces are cleaned and, if necessary, additional treatments or finishes are applied.<\/li>\n<\/ol>\n\n\n\n

    The results are high precision parts<\/strong>, with tight tolerances and mechanical properties comparable - and even superior - to those obtained by traditional methods.<\/p>\n\n\n\n

    Common types of PBF technologies<\/h2>\n\n\n\n

    Depending on the material and application, there are different variants of the PBF process. The most commonly used are:<\/p>\n\n\n\n

    1. SLS (Selective Laser Sintering)<\/em><\/strong><\/h3>\n\n\n\n

    Use a high power laser<\/strong> to sinter (partially fuse) polymer particles, such as nylon (PA12 or PA11).<\/p>\n\n\n\n

    It is ideal for functional parts, tooling, prototypes or short production runs<\/strong>, and offers high strength and dimensional stability.<\/p>\n\n\n\n

    At Additium 3D we use this technology to produce hundreds of parts every day, optimising manufacturing times and costs.<\/a><\/p>\n\n\n\n

    2. SLM (Selective Laser Melting)<\/em><\/strong><\/h3>\n\n\n\n

    This variant is used with metals<\/strong> (stainless steel, titanium, aluminium, cobalt-chrome, etc.).<\/p>\n\n\n\n

    The laser completely melts the metal powder, creating pieces dense, tough and high-precision<\/strong>.<\/p>\n\n\n\n

    It is a common solution in sectors such as aeronautics, automotive or <\/strong>medicine<\/strong><\/a>.<\/p>\n\n\n\n

    3. MJF (Multi Jet Fusion)<\/em><\/strong><\/h3>\n\n\n\n

    Developed by HP, it uses fusion agents and thermal energy<\/strong> instead of lasers.<\/p>\n\n\n\n

    It offers more uniform finishes, high speed and accuracy<\/strong>, being perfect for series production and complex geometries<\/strong>.<\/p>\n\n\n\n

    At Additium 3D we also work with MJF for projects requiring high production volume<\/strong> y tight deadlines<\/strong>.<\/p>\n\n\n\n

    Advantages of powder bed fusion 3D printing<\/h2>\n\n\n\n