BJT – spiekanie lepiszczem / technologia Binder Jetting
Binder Jetting Technology (BJT) is an additive manufacturing process in which metal powder is selectively bonded using a binder and subsequently consolidated by debinding and sintering. The process places specific demands on powder quality, as final part density, mechanical performance, and dimensional accuracy are strongly influenced by powder characteristics and post‑processing behavior. Materials must show consistent sinterability, controlled chemistry, and predictable shrinkage during thermal treatment.
Steel and alloy powders commonly used in BJT include low‑alloy steels, stainless steels, tool steels, and nickel‑based alloys. Powders are typically optimized for high packing density and uniform particle size distribution to ensure homogeneous green parts and reduced distortion during sintering. Material purity, low oxygen content, and stable alloy composition are essential to avoid porosity, grain growth inconsistencies, or reduced mechanical properties. Quality features include certified powder batches with full traceability, controlled powder handling and reuse, validated debinding and sintering cycles, and dimensional compensation strategies. Metallurgical testing, density verification, and non‑destructive inspection ensure that BJT components meet structural and functional requirements comparable to conventionally manufactured parts.