← Glossary
Superduplex Heat Affected Zone Grain Coarsening
Grain coarsening in the heat-affected zone next to a weld, which reduces impact toughness and requires precise control.
Physicochemical Mechanism of Action
Super duplex heat-affected zone grain coarsening occurs when the material near the weld cools too quickly. This leads to uneven grain growth and increases grain size.
Metallurgical Relevance & Welding Risks
A coarsened grain structure makes the material less impact-resistant and can lead to cracks and failure. This particularly affects the mechanical properties and service life of components.
Workshop Practice & Action Guidelines
To avoid super duplex heat-affected zone grain coarsening, careful control of heat input is required. The cooling time should be between 10 and 20 seconds to ensure a homogeneous structure. Use a controlled cooling process and ensure even heat distribution.
MetallurgieSchweißtechnik