Specific thermal conductivity
Thermal conductivity is a material's ability to conduct heat. Non-ferrous metals like aluminum and copper have higher thermal conductivity than iron. This requires special welding processes.
Physicochemical Mechanism of Action
The specific thermal conductivity of a material describes how well it conducts heat from one point to another. Non-ferrous metals have higher conductivity than iron and other metals.
Metallurgical Relevance & Risks in Welding
In metals with high specific thermal conductivity, such as aluminum and copper, the weld cools faster. This can lead to a rapid cooling rate, which may cause glass-hard martensite and increased risk of cracking.
Workshop Practice & Instructions
For non-ferrous metals like aluminum and copper, it's important to design the welding process to keep cooling controlled. This can be achieved by using special shielding layers or adjusting welding parameters. Avoid overly rapid cooling to prevent cracks and hardness issues.