Extrusion & Post
14 visualizaciones
Extruded PEEK pipes crack due to large internal stress
Fenómeno del problema
Extruded pipes/rods crack on their own after placement
Análisis de la causa
Cooling too fast after extrusion causes a temperature difference between the surface layer and the core, producing quenching stress; the volume effect of PEEK crystallization shrinkage; inconsistent internal and external cooling rates
Solución
Use segmented gradient cooling (hot→warm→cold) instead of direct cooling; post-anneal the product at 250°C/2h to eliminate stress; control the matching of extrusion speed and cooling speed
Conclusión clave
Annealing treatment is the most effective method to eliminate internal stress in PEEK products
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!