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研究了西宁特钢 5 0tEAFEBT 6 0tLF冶炼GCr15高碳铬轴承钢时电弧炉泡沫渣操作、钢包炉(LF)吹氩精炼和成分微调、浇铸等工艺因素对钢中氮含量的影响。研究结果表明 ,电弧炉良好的泡沫渣操作 ,钢水脱碳量ΔC大于 0 .6 %可使钢中氮含量降到 (10～ 2 0 )× 10 - 6 。在LF精炼时 5 0t钢水加 2 0 0kg碳粉可使钢水氮含量增加 19× 10 - 6 ,加合金可使钢水中平均氮含量增加 4 .2× 10 - 6 ,浇铸过程钢水氮含量增加 12× 10 - 6 。因此在LF精炼时减小碳和合金加入量可减少钢中氮含量的增加。
The effect of technological parameters such as foaming slag operation, ladle argon (LF) blowing argon refining, composition trimming and casting on the GCS15 high carbon chromium bearing steel of Xining Special Steel for GCr15 high carbon chromium bearing steel was investigated. The results show that the good foaming slag operation in EAF and the decarburization of molten steel ΔC greater than 0.6% can reduce the nitrogen content in the steel to (10 ~ 20) × 10 - 6. In the LF refining, 50t of molten steel and 200kg of carbon powder can increase the nitrogen content of the molten steel by 19 × 10-6, adding the alloy can increase the average nitrogen content in the molten steel by 4.2 × 10-6, and the nitrogen content in the molten steel increases by 12 × 10 - 6. Therefore, reducing the amount of carbon and alloy added during LF refining can reduce the increase of nitrogen content in the steel.