Weldability Parameter according to Ito and Bessyo
The Weldability Parameter according to Ito and Bessyo is a mathematical index to estimate the cracking sensitivity of low-carbon steels. It directly correlates chemical analysis values with the formation of cold-crack-prone microstructures.
Physicochemical Mechanism of Action
The Weldability Parameter by Ito and Bessyo is based on a mathematical formula that combines chemical additives like silicon, molybdenum, and nickel with their influence on crack sensitivity. These parameters help predict whether a weld is prone to cold cracking.
Metallurgical Relevance & Welding Risks
In low-carbon steels, certain additives can create microstructures susceptible to cold cracks. The Weldability Parameter helps identify these dangers and take measures to avoid cracks.
Shop Practice & Action Guidelines
To correctly apply the Weldability Parameter by Ito and Bessyo, the steel's chemical additives must be analyzed. A high value (> 0.5) requires careful welding to avoid cold cracks. This can be achieved by slow cooling control and optimal weld temperature.