Here's a quick guide to picking the right recarburizer:
1. High-temperature graphite recarburizers like graphite electrodes or graphite petroleum coke are great as they have a high absorption rate and dissolve quickly. This helps to reduce energy consumption and improve metallurgical quality. Choose recarburizers with low impurity levels, especially sulfur and nitrogen.
2. High sulfur recarburizers also have high nitrogen content, and if the nitrogen content of the grey cast iron fluid is higher than the equilibrium concentration, cracks may form in the nitrogen pores.Liquid ductile iron is prone to shrinkage defects in thick-walled parts, and with a high content of impurities, castings are prone to slag formation.
3. The quality of raw materials of graphite pig iron processed at high temperature is relatively good. If you don't test it, you can feel and see it with your hands, and good traces can be drawn on paper.
