Residual Porosity After Sintering
Residual porosity is the share of remaining voids in the metal after sintering. A low pore content increases fatigue strength and toughness level.
Physical-Chemical Working Mechanism
After sintering, some metals retain voids that formed during the melting process. This residual porosity can be influenced by factors like the sinter material and temperature.
Metallurgical Relevance & Welding Risks
High residual porosity can weaken the metal, leading to cracks or deformation under mechanical load. It can also increase permeability to liquids and gases, which may be undesirable in certain applications.
Shop Practice & Action Guidelines
To minimize residual porosity, select the sinter material carefully. Control the sintering temperature precisely to achieve optimal density and minimal pore formation. For special applications, consider post-processing like polishing or pressing to further reduce voids.