Degree of saturation
Saturation degree indicates how much carbon is in the melt. It affects casting and microstructure formation.
Physicochemical Mechanism of Action
Carbon saturation degree refers to the amount of carbon in the melt relative to the eutectic point. If the carbon content is too high, the system can no longer hold carbon in solution, and it precipitates out.
Metallurgical Relevance & Risks in Welding
Too high a saturation degree leads to excessive carbon content, which can cause fusion issues and a hard microstructure. This increases susceptibility to cracking and reduces the toughness of the steel.
Workshop Practice & Action Guidelines
To control the saturation degree, the carbon content in the melt must be precisely controlled. For cast iron, the saturation degree should be between 0.5% and 1.2%. Carefully monitor the temperature and pouring to achieve a homogeneous structure.