Researchers have developed a method to create "breathable" steel using selective laser melting (SLM) 3D printing and foaming agents like chromium nitride. This technique generates interconnected, micrometer-scale pores in the metal, allowing gases to vent while blocking larger polymer molecules. For manufacturing engineers, this innovation directly addresses gas porosity defects in injection molding without relying on complex, traditional exhaust ports or simple sintered inserts. The process allows for intricate mold designs with built-in venting, improving part quality and expanding the possibilities of additive manufacturing.
Read the full article at Hackaday
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