Solidus temperature
The solidus temperature is the point at which an alloy becomes completely solid and no further melting occurs. Below this temperature, melting begins upon heating.
Physical-Chemical Mechanism of Action
The solidus temperature is the highest temperature at which an alloy is completely solid in thermal equilibrium. It corresponds to the endpoint of the melting process and marks the transition from liquid to solid phase.
Metallurgical Relevance & Welding Risks
The solidus temperature is critical for the solidification and microstructure of the weld. Heating above this temperature can cause deformation or even melting of the material, leading to cracks or weak spots. It also affects the hardness and toughness of the weld.
Workshop Practice & Action Instructions
To ensure the solidus temperature is not exceeded, it's important to watch the maximum heat input. This can be done by choosing the right welding process and controlling the heat source. For steel alloys with a high solidus temperature, work extra carefully to avoid distortion or melting.