CN115161453A - 一种防止冷轧高牌号硅钢边损边裂的制备方法 - Google Patents
一种防止冷轧高牌号硅钢边损边裂的制备方法 Download PDFInfo
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 230000009467 reduction Effects 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000005098 hot rolling Methods 0.000 claims description 8
- 238000005554 pickling Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000009628 steelmaking Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
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Abstract
本发明公开了一种防止冷轧高牌号硅钢边损边裂的制备方法,控制板坯中的成分及其含量如下:按质量百分比计,C≤0.0030%、Si 2.0%~3.05%、Mn 0.2%~0.6%、Ti≤0.0025%、Al 0.3%~0.8%、S≤0.0020%,其余为铁及其他不可避免的杂质;控制板坯入炉温度≥300℃,司炉温度1100~1160℃,在炉时间150~250min,终轧温度840~870℃,卷取温度600~680℃;控制常化温度840~880℃;控制开轧前带钢温度不低于40℃,控制首道次压下率不超过总压下率的5%。本发明通过优化全流程工艺参数,可以改善硅钢的边部质量状态,防止边损边裂的产生。
Description
技术领域
本发明属于高牌号硅钢生产技术领域,具体涉及一种防止冷轧高牌号硅钢边损边裂的制备方法。
背景技术
高牌号硅钢作为无取向电工钢重要的一部分,由于其铁损低,磁导率高,广泛应用于家电及新能源汽车领域。高牌号硅钢一般要求硅含量在2.0%以上,但随着硅含量的增加,硅钢的生产难度也相应加大,热轧及冷轧过程中易于产生边损边裂。其中,冷轧硅钢边损边裂产生的原因比较复杂,与钢的化学成分、板坯的入炉温度、板坯的加热制度、终轧温度、常化温度以及单机架轧制工艺制度等都有密切相关性,是多因素综合作用的结果。
发明内容
解决的技术问题:针对上述技术问题,本发明提供了一种防止冷轧高牌号硅钢边损边裂的制备方法,通过优化硅钢生产的全流程工艺参数,可以改善硅钢的边部质量状态,防止边损边裂的产生。
技术方案:一种防止冷轧高牌号硅钢边损边裂的制备方法,包括步骤如下:
(1)炼钢得到板坯,其中,控制板坯中的成分及其含量如下:按质量百分比计, C≤0.0030%、Si 2.0%~3.05% 、Mn 0.2%~0.6%、Ti≤0.0025%、Al 0.3%~0.8%、S≤0.0020%,其余为铁及其他不可避免的杂质;
(2)热轧卷取得到带钢,其中,控制板坯入炉温度≥300℃,司炉温度1100~1160℃,在炉时间150~250min,终轧温度840~870℃,卷取温度600~680℃;
(3)常化酸洗,其中,控制常化温度840~880℃;
(4)轧制得到成品,其中,控制开轧前带钢温度不低于40℃,控制首道次压下率不超过总压下率的5%。
优选的,所述步骤(1)中板坯的拉速为1.1~1.4m/min。
优选的,所述步骤(3)中控制酸洗速度为30~50m/min。
优选的,所述步骤(3)中常化过程采用边部加热装置。
优选的,所述步骤(4)采用单机架轧制。
优选的,所述步骤(4)中采用7道次轧制,每道次压下率依次为4%、9%、32%、33%、31%、25%、24%。
有益效果:本发明不需要改造现有设备,只需要改变现有工艺参数,具体地:通过优化合金成分、热轧工艺、常化工艺及轧制参数,可以显著改善硅钢的边部质量状态。
本发明严格控制了板坯入炉温度和在炉时间,避免了以下问题:入炉温度过低,再加上加热温度快以及高牌号硅钢的热传导性差,易于产生微裂纹;在炉时间过长会使边部晶粒粗大化且不均匀,大晶粒延展性较强,轧制过程中易产生边部缺陷。
本发明优化了常化温度:常化温度过高会导致晶粒粗大,带钢塑性变差,轧制时易出现边裂。
本发明通过第一道次小压下进一步提升了带钢表面温度,提升了带钢可轧性,使得单机架轧制下线成品边部质量良好。
具体实施方式
下面结合具体实施例对本发明作进一步描述。
实施例1
利用本发明所涉及到的方法及控制措施依次在某转炉炼钢机组、1450热轧机组、常化酸洗机组、单机架机组生产高牌号硅钢。
具体步骤及相关控制参数如下:
【1】炼钢采用KR脱硫—转炉—精炼—连铸生产流程,板坯成分按质量百分比计,C:0.0018%、Si:2.45 % 、Mn 0.35%、Ti:0.0010%、Al 0.45%、S:0.0015%,其余为铁及其他不可避免的杂质,板坯拉速控制在1.2m/min。
【2】控制板坯入炉温度380℃,热轧司炉温度1130℃,在炉时间230min,终轧温度860℃,卷取温度630℃。严格控制板坯入炉温度和在炉时间,入炉温度过低,再加上加热温度快以及高牌号硅钢的热传导性差,易于产生微裂纹;在炉时间过长会使边部晶粒粗大化且不均匀,大晶粒延展性较强,轧制过程中易产生边部缺陷
【3】常化酸洗速度控制在35m/min,常化温度控制在860℃,常化投用边部加热装置。常化温度过高会导致晶粒粗大,带钢塑性变差,轧制时易出现边裂。
【4】单机架开轧前确保带钢温度不低于40℃,采用首道次小压下7道次轧制,每道次压下率控制分别为4%、9%、32%、33%、31%、25%、24%,通过第一道次小压下进一步提升带钢表面温度,提升带钢可轧性。
单机架轧制下线成品边部质量良好,无边损边裂产生。
对比例1
利用本发明所涉及到的方法及控制措施依次在某转炉炼钢机组、1450热轧机组、常化酸洗机组、单机架机组生产高牌号硅钢。
具体步骤及相关控制参数如下:
【1】炼钢采用KR脱硫—转炉—精炼—连铸生产流程,板坯成分按质量百分比计,C:0.0018%、Si:2.45 % 、Mn 0.35%、Ti:0.0010%、Al:0.45%、S:0.0015%,其余为铁及其他不可避免的杂质,板坯拉速控制在1.2m/min。
【2】控制板坯入炉温度280℃,热轧司炉温度1130℃,在炉时间230min,终轧温度860℃,卷取温度630℃。
【3】常化酸洗速度控制在35m/min,常化温度控制在900℃,常化投用边部加热装置。
【4】单机架开轧前确保带钢温度不低于40℃,采用首道次大压下5道次轧制,每道次压下率控制分别为24%、25%、26%、28%、28%。单机架轧制首道次断带率明显提升,调试阶段断带率高达20%,严重影响生产稳定。
Claims (6)
1.一种防止冷轧高牌号硅钢边损边裂的制备方法,其特征在于,包括步骤如下:
(1)炼钢得到板坯,其中,控制板坯中的成分及其含量如下:按质量百分比计, C≤0.0030%、Si 2.0%~3.05% 、Mn 0.2%~0.6%、Ti≤0.0025%、Al 0.3%~0.8%、S≤0.0020%,其余为铁及其他不可避免的杂质;
(2)热轧卷取得到带钢,其中,控制板坯入炉温度≥300℃,司炉温度1100~1160℃,在炉时间150~250min,终轧温度840~870℃,卷取温度600~680℃;
(3)常化酸洗,其中,控制常化温度840~880℃;
(4)轧制得到成品,其中,控制开轧前带钢温度不低于40℃,控制首道次压下率不超过总压下率的5%。
2.根据权利要求1所述的一种防止冷轧高牌号硅钢边损边裂的制备方法,其特征在于,所述步骤(1)中板坯的拉速为1.1~1.4m/min。
3.根据权利要求1所述的一种防止冷轧高牌号硅钢边损边裂的制备方法,其特征在于,所述步骤(3)中控制酸洗速度为30~50m/min。
4.根据权利要求1所述的一种防止冷轧高牌号硅钢边损边裂的制备方法,其特征在于,所述步骤(3)中常化过程采用边部加热装置。
5.根据权利要求1所述的一种防止冷轧高牌号硅钢边损边裂的制备方法,其特征在于,所述步骤(4)采用单机架轧制。
6.根据权利要求1所述的一种防止冷轧高牌号硅钢边损边裂的制备方法,其特征在于,所述步骤(4)中采用7道次轧制,每道次压下率依次为4%、9%、32%、33%、31%、25%、24%。
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