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邯郸发明巡礼—“一种改善超低碳IF钢结晶器液面波动的连铸方法”

  • 2026-02-05 08:27:15
邯郸发明巡礼—“一种改善超低碳IF钢结晶器液面波动的连铸方法”
    随着我国汽车行业的快速发展,汽车面板所使用的超低碳IF钢需求量日益剧增, 同时客户对汽车面板表面质量要求亦日益严格。连铸在浇注超低碳IF钢过程中,经常会发 生塞棒上涨,塞棒头部、中间包浸入式水口内壁夹杂物结瘤、掉块或连铸设备精度不良等非 稳态状态诱发结晶器液面波动现象,不仅影响连铸生产顺行,还会对产品质量产生很大风 险。因为结晶器液面波动越大,结晶器流场受外界干扰影响越不稳定,结晶器液面卷渣风险 升高,铸坯皮下夹杂缺陷产生几率越高,造成后续轧制钢卷表面长条状线性夹杂、翘皮等表 面质量缺陷越多,同时大的结晶器液面波动会带来连铸浇注不稳定,轻者造成铸坯内部夹 杂物含量增加,重者造成铸坯纵裂漏钢、夹渣漏钢等恶性生产事故隐患。 
    超低碳IF钢结晶器液面波动主要有两种,一种是钢水洁净度质量差造成的塞棒头 部或者中间包浸入式水口内壁、吐出孔等部位夹杂物集聚、结瘤物掉块诱发无规律的结晶 器液面波动;另一种是连铸机设备精度不良、扇形段压下偏差,二冷水量不足等原因造成坯 壳厚度不均,坯壳内未凝固的钢液受内部钢液挤压等静压力作用造成类似“涨肚”状的周期 性液面波动。
    目前国内外对超低碳IF钢连铸结晶器液面波动的研究主要从连铸保护浇注、RH升 温吹氧量、二冷水量控制等原因进行分析和研究,但是通过对超低碳IF钢结晶器液面波动 的预判进行控制的鲜有报道。     
    公开号为CN118558968A的中国专利申请公开了一种超低碳钢连铸结晶器周期性 团簇状液面波动控制方法,该方法仅通过冷却水量优化控制,提高坯壳对液芯变化的抵抗 能力,控制结晶器周期性团簇状液面波动发生。但是对其他影响液面波动的工艺参数未进 行任何研究。     公开号为CN114918393A的中国专利公开了一种控制中、低碳钢结晶器液位周期性 波动的方法,该方法通过获取结晶器的液位数据及各驱动辊的电流数据,并对液位数据和 电流数据进行差分处理确定驱动辊数据,找出鼓肚扇形段位置,消除结晶器周期性液面波 动。但是对工艺影响参数均未做涉及。
    公开号为CN112828254A的中国专利申请公开了一种包晶钢连铸结晶器液面波动 的控制方法,该方法针对的是包晶钢的液面波动采取包晶钢专用保护渣等措施,而对超低 碳钢的液面波动未提。
    公开号CN105945252A的中国专利申请公开了一种控制结晶器液面波动的方法,该 方法仅通过调整浸入式水口插入深度改善结晶器液面波动,且调整幅度最大为3mm。但对铸 机设备、三路吹氩、保护浇注等方面未做过多涉及。 
    《超低碳钢连铸结晶器液面波动原因分析及改进》为《河北冶金》2021年第10期65 3 3 说 明 书 CN 119747635 B 2/6 页 ~71页的论文,该论文钢水纯净度、过热度、塞棒吹氩量、浸入式水口插入深度等影响结晶 器液面波动的因素进行分析,但是未对铸机设备精度方面影响液面波动做研究。 
     以上方法对影响超低碳IF钢结晶器液面波动的因素进行了分析和研究,但是对结 合产前预判减少结晶器液面波动风险未做任何研究。
    本发明公开了一种改善超低碳IF钢结晶器 液面波动的连铸方法,包括下述控制工艺:产前 连铸机设备确认:连铸开浇前对连铸机设备状态 进行确认,若浇次间≥2.5小时,对扇形段进行穿 辊缝并对异常的扇形段进行重新标定,要求扇形 段压下偏差≤0.5mm;若浇次间<2.5小时,则进 行下述控制:当连铸机设备精度控制正常时,浇 注拉速和二冷水量按照要求正常控制;当连铸机 扇形段1~3段存在0.5mm≤压下偏差<1mm,拉速 在正常铸机状态的要求下降低0.05m/min;且对1 ~3段所对应铸机回路的二冷水量各增加15%~ 25%。本方法有效预防了结晶器液面波动,显著改 善了结晶器液面波动。
(特别注意:任何单位或者个人未经专利权人许可,都不得实施其专利,即不得为生产经营目的制造、使用、许诺销售、销售、进口其专利产品,或者使用其专利方法以及使用、许诺销售、销售、进口依照该专利方法直接获得的产品。)

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  1. CONNECT:[ UseTime:0.000598s ] mysql:host=127.0.0.1;port=3306;dbname=nowww460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000707s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.007391s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.006926s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000694s ]
  6. SELECT * FROM `set` [ RunTime:0.008130s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000791s ]
  8. SELECT * FROM `article` WHERE `id` = 471453 LIMIT 1 [ RunTime:0.054730s ]
  9. UPDATE `article` SET `lasttime` = 1770268038 WHERE `id` = 471453 [ RunTime:0.009363s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.016640s ]
  11. SELECT * FROM `article` WHERE `id` < 471453 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.031725s ]
  12. SELECT * FROM `article` WHERE `id` > 471453 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.020300s ]
  13. SELECT * FROM `article` WHERE `id` < 471453 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.039183s ]
  14. SELECT * FROM `article` WHERE `id` < 471453 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.023081s ]
  15. SELECT * FROM `article` WHERE `id` < 471453 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.009989s ]
0.309708s