Low-carbon low-silicon cold forging steel deoxidation method

• Main Authors: HU XIANFENG, XU YOUSHUN, WANG GUAN, LI LI, XUN ZHONGZHONG, GUO JUNYU, REN SHIGANG, HUANG HANZHE, LIU ZHILONG
• Format: Patent
• Language: Chinese; English
• Published: 04.11.2022
• Subjects: CHEMISTRY; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

The invention relates to the technical field of smelting manufacturing, in particular to a low-carbon low-silicon cold forging steel deoxidation method which comprises the following steps: when tapping is started and the oxygen content is greater than 350ppm, adding carbon powder for deoxidation; and when the free oxygen in the steel is 300-400 ppm after deoxidation, ferro-aluminum is added for deoxidation. According to the deoxidation method for the carbon low-silicon cold forging steel, generation of Al2O3 inclusions can be reduced on the basis that the ALs content of the molten steel is guaranteed during deoxidation, and then the purity of the molten steel is improved. 本发明涉及冶炼制造技术领域，具体而言，涉及低碳低硅冷镦钢脱氧方法，包括：在开始出钢，且氧含量＞350ppm时，加入碳粉脱氧；在脱氧至钢中自由氧剩余300-400ppm时，加入铝铁脱氧。本发明的碳低硅冷镦钢脱氧方法，能够在脱氧时，保证钢水ALs含量的基础上，减少Al2O3夹杂物的生成，进而提高钢水的纯净度。