1. The role of phosphorus and sulfur in steel
Phosphorus and sulfur are harmful elements in steel, which affect the quality and performance of steel to a certain extent. Among them, phosphorus mainly affects the cold brittleness and plasticity of steel, reduces the toughness and toughness temperature of steel; while sulfur affects the high-temperature processing performance of steel.
2. Why should phosphorus and sulfur content be controlled
During the welding process, the presence of sulfur and phosphorus will cause low-melting point eutectics to appear in the weld, increasing the risk of welding hot cracks. Therefore, controlling the sulfur and phosphorus content is crucial to ensure welding quality and weld stability.
And the presence of sulfur and phosphorus will reduce the mechanical properties of steel, especially in high and low temperature environments. Controlling the sulfur and phosphorus content can reduce the looseness and crack tendency of steel, thereby improving its overall mechanical properties and stability.
3. How to control phosphorus and sulfur content
In order to achieve the purpose of controlling the phosphorus and sulfur content in steel, manufacturers have adopted a variety of technical means and measures:
1. Select high-quality raw materials: Use low-phosphorus and low-sulfur raw materials for smelting to reduce the phosphorus and sulfur content as much as possible.
2. Master the appropriate smelting process: Use a variety of smelting processes, such as steelmaking, converter, electric furnace, etc., to achieve the effect of reducing phosphorus and sulfur content.
3. Add control agents: Use vanadium, aluminum, manganese and other control agents for control and treatment to achieve the effect of controlling phosphorus and sulfur content.
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