Dispersion Hardening
Dispersion strengthening increases mechanical strength by introducing stable particles into a soft matrix. These particles hinder dislocation glide, making the steel harder.
Physical-Chemical Mechanism of Action
Dispersion strengthening is based on introducing stable particles, such as silicon carbide or nickel alloy particles, into a soft matrix. These particles hinder dislocation glide within the metal, thereby increasing strength.
Metallurgical Relevance & Risks in Welding
If the content of dispersion particles is too high, the steel can become too hard and lose ductility. This increases the risk of cracking and fracture. Additionally, hardness can make welding difficult, as high temperatures are required to liquefy the particles.
Workshop Practice & Action Guidelines
To successfully incorporate dispersion strengthening, the particle content must be precisely controlled. When welding, it is important to keep temperatures high enough to liquefy and evenly distribute the particles. This requires careful control of welding parameters such as temperature and time.