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南京钢铁联合有限公司采用100t电炉→LF精炼炉→VD真空炉→320mm×480mm大方坯连铸工艺流程,制定了合理的内控成分,并强化电炉终点控制、LF造白渣脱氧、增氮增硫、夹杂物变性处理、低过热度全保护浇铸等关键生产工艺,开发生产了C38MnNS5直接车削加工用非调质钢,具有优异的强塑性配合,屈服强度在560MPa以上,抗拉强度大于860MPa,冲击功在70J以上,各项指标达到用户技术要求。
Nanjing Iron and Steel United Co., Ltd. adopted 100t electric furnace → LF refining furnace → VD vacuum furnace → 320mm × 480mm bloom continuous casting process, developed a reasonable internal control components, and strengthen the end of the furnace control, LF white residue deoxidation, sulfur by nitrogen , Inclusions denaturation, low overheating full protection of the casting and other key production technology, development and production of C38MnNS5 non-quenched and tempered steel for direct turning, with excellent plasticity, yield strength of 560MPa or more, tensile strength greater than 860MPa, impact Work more than 70J, the indicators meet the technical requirements of users.