Peritectoid Point
The peritectic point is a critical temperature point at which two solid phases combine into a third solid phase. This affects the structure and properties of the joined steel.
Physical-Chemical Mechanism of Action
The peritectoid point is a specific temperature where two solid phases in a metal combine into a new solid phase. This process can cause complexities in the microstructure and affect mechanical properties.
Metallurgical Relevance & Welding Risks
If handled incorrectly during cooling, the metal can undergo unwanted phase transformations at this point, leading to hardness issues and cracks in the weld. It's crucial to ensure the correct cooling rate and temperature.
Shop Practice & How-To
To minimize the risk of phase transformations, control the cooling of the metal. This can be done by using special coolants or by carefully selecting welding parameters. For steels with complex microstructures, it's especially important to account for the peritectoid point and adjust the cooling rate accordingly.