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High purity silicon carbon alloys (represented by SiC60 HP) control key harmful elements within P ≤ 0.10% and S ≤ 0.08% (better than the national standard by more than 50%) through raw material selection and vacuum refining processes, providing a "clean alloy source" for special steel smelting:Pure steel guarantee: When applied in the deoxidation process of high-end steel grades such as bearing steel (GCr15) and valve steel (5Cr21Mn9Ni4N), its ultra-low phosphorus sulfur characteristics can reduce the total amount of non-metallic inclusions in the steel by ≥ 15% (ISO 4967 detection), and suppress the precipitation of brittle phases such as MnS and FeP.Strengthening and toughening synergistic mechanism: 60% high silicon content promotes deep deoxidation of molten steel and enhances the strengthening effect of silicon solid solution; Simultaneously precise carbon control (C 5.0 ± 0.5%) optimizes austenite stability, resulting in an 8-10% increase in impact energy (KU ₂) after heat treatm…