Resistance to Hot Cracking
Hot cracking resistance is the ability to avoid cracks during cooling. It's achieved through controlled cooling and minimal stresses.
Physicochemical mechanism of action
Hot crack resistance is based on controlling the cooling rate and stress in the material. Rapid cooling can create stresses that lead to cracks. Controlled cooling prevents these stresses.
Metallurgical relevance & risks during welding
Lack of hot crack resistance can lead to cracks and distortion during cooling, which affects the service life and reliability of the material. This can be particularly dangerous for highly stressed components.
Workshop practice & instructions
To ensure hot crack resistance, controlled cooling is essential. This can be achieved by choosing the right welding process and correct parameter settings. For heavy steels or complex components, it is advisable to create and follow a cooling plan.