What is Solidus in Welding?
The solidus is the highest temperature at which a metal or alloy is completely solid. For welding purposes, this is important because it determines the minimum temperature at which a weld can be made without melting the base metal. The solidus also affects the way a metal behaves during welding, as well as the properties of the resulting weld.
The solidus also varies depending on the cooling rate of the metal. For example, metals that are cooled slowly have a higher solidus than those that are cooled quickly. This is because slow cooling allows for more time for impurities to segregate out of the metal.
What is a solidus line?
A solidus line is an imaginary line on a phase diagram that represents the temperature below which a material is completely solid. The solidus line is important because it determines the minimum temperature at which a weld can be made without melting the base metal.
The solidus line is affected by many factors, including:
- the composition of the metal,
- or allow the number of impurities present temperature at which the metal was cooled general,
- the purer the metal or alloy,
- the higher its solidus temperature will be.
What is a solidus material?
A solidus material is a material that has a solidus temperature that is equal to or higher than the melting point of the metal being welded. For example, if you are welding steel, a solidus material would be one with a solidus temperature that is equal to or higher than the melting point of steel.
Why are solidus and liquidus important in brazing?
Brazing is a welding process that uses a filler metal with a melting point that is lower than the base metals being joined. The filler metal is melted and then flowed into the joint between the two base metals. As the filler metal cools, it forms a bond between the two base metals.