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热处理工艺对0.25% Si含铌无取向硅钢显微组织和铁损的影响

张文岳 张峰

张文岳, 张峰. 热处理工艺对0.25% Si含铌无取向硅钢显微组织和铁损的影响[J]. 钢铁钒钛, 2021, 42(1): 164-169. doi: 10.7513/j.issn.1004-7638.2021.01.027
引用本文: 张文岳, 张峰. 热处理工艺对0.25% Si含铌无取向硅钢显微组织和铁损的影响[J]. 钢铁钒钛, 2021, 42(1): 164-169. doi: 10.7513/j.issn.1004-7638.2021.01.027
Zhang Wenyue, Zhang Feng. Effects of heat treatment process on microstructure and iron loss of 0.25% Si non-oriented silicon steel sheets containing niobium[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 164-169. doi: 10.7513/j.issn.1004-7638.2021.01.027
Citation: Zhang Wenyue, Zhang Feng. Effects of heat treatment process on microstructure and iron loss of 0.25% Si non-oriented silicon steel sheets containing niobium[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 164-169. doi: 10.7513/j.issn.1004-7638.2021.01.027

热处理工艺对0.25% Si含铌无取向硅钢显微组织和铁损的影响

doi: 10.7513/j.issn.1004-7638.2021.01.027
基金项目: 国家自然科学基金资助项目(A16EC17604)。
详细信息
    作者简介:

    张文岳(1985—),男,广东惠来人,大学本科,工程师,主要从事新型热处理工艺技术开发和试验研究

    通讯作者:

    张峰(1976—),男,河南正阳人,博士,高级工程师,主要从事新型热处理工艺开发和技术管理,E-mail:zhangfengboasteel@163.com

  • 中图分类号: TF76, TG156.2

Effects of heat treatment process on microstructure and iron loss of 0.25% Si non-oriented silicon steel sheets containing niobium

  • 摘要: 向无取向硅钢中添加适量的铌元素,可以有效改善成品钢的显微组织和机械性能,但会对电磁性能产生不利影响。截至目前,尚不清楚铌元素在无取向硅钢中的存在形式、作用机理,以及在不同热处理工艺条件下对电磁性能的影响效果。研究结合0.25% Si含铌无取向硅钢生产实际,探讨了铌元素在钢中的存在形式、作用机理和影响效果,并借助热处理工艺优化以减轻铌元素对钢电磁性能的影响。结果表明,铌元素在钢中会形成百纳米级、数量众多的有害夹杂物,钉扎晶界和降低晶界扩散率,并推迟钢的再结晶开始温度和结束温度,因而,导致晶粒细化和铁损升高。随着钢中铌含量增加,钢的涡流损耗基本相当,但磁滞损耗不断增加。合理的热处理工艺,可以促进消除应力退火之后的晶粒尺寸长大,并在一定程度上减少磁滞损耗之间的差异。
  • 图  1  成品试样中的含Nb夹杂物形貌

    Figure  1.  Morphology of Nb- containing inclusions in the finished steel sample

    图  2  成品试样中夹杂物的数量和尺寸

    Figure  2.  Number and size distribution of the inclusion in the finished steel samples

    图  3  不同铌含量冷轧试样的再结晶显微组织

    Figure  3.  Crystallization microstructure of the cold rolled samples after continuous annealing under different Nb concentrations

    图  4  SRA退火工艺对成品钢试样晶粒尺寸的影响

    Figure  4.  Effects of stress release annealing on grain size in the finished steel samples under different Nb concentrations

    图  5  退火温度对铁损分离的影响

    Figure  5.  Effect of annealing temperature on iron loss deviations of the finished steel samples

    表  1  SRA退火工艺对成品钢试样铁损的影响

    Table  1.   Effects of stress release annealing on iron loss in the finished steel samples under different Nb concentrations

    条件铁损P15/50/(W·kg−1)
    0.000 5% Nb 0.005 1% Nb 0.008 3% Nb
    工艺1 4.28 4.44 4.58
    工艺2 3.27 3.61 3.99
    工艺3 3.13 3.32 3.53
    工艺4 3.10 3.15 3.31
    注:工艺1-BF SRA;工艺2-750 ℃×2 h;工艺3-825 ℃×1 h;工艺4-825 ℃×2 h。
    下载: 导出CSV
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  • 收稿日期:  2020-04-16
  • 刊出日期:  2021-02-10

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