Interstitial carbon solubility
Interstitial carbon solubility is the maximum number of carbon atoms that can be placed between the atoms of the metal lattice. It affects the strength and hardness of steels.
Physico-Chemical Mechanism of Action
Interstitial carbon solubility refers to the ability of a metal to insert carbon atoms between its own atoms (interstitial sites). This process can be induced by heat treatment or chemical compounds.
Metallurgical Relevance & Risks in Welding
Carbon solubility influences the hardness and strength of steels. Too much carbon can lead to increased hardness, making the structure glass-hard and reducing toughness. This can lead to hot cracking and other mechanical problems.
Workshop Practice & Action Guidelines
To control carbon solubility, it is important to adhere strictly to welding temperatures and times. For steels with high carbon content, a slow cooling (e.g., t8/5 > 25 s) should be carried out to avoid porosity and keep the structure softer.