CN108411087A - 一种附着力优良的无取向电工钢生产方法 - Google Patents

一种附着力优良的无取向电工钢生产方法 Download PDF

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CN108411087A
CN108411087A CN201810214349.3A CN201810214349A CN108411087A CN 108411087 A CN108411087 A CN 108411087A CN 201810214349 A CN201810214349 A CN 201810214349A CN 108411087 A CN108411087 A CN 108411087A
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coating
strip
electrical steel
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oriented electrical
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夏雪兰
裴英豪
王立涛
施立发
张振海
刘青松
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Maanshan Iron and Steel Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233Cold rolling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00Processes for applying liquids or other fluent materials
    • B05D1/28Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254After-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/12Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1277Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
    • C21D8/1283Application of a separating or insulating coating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/16Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
    • H01F1/18Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets with insulating coating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

本发明公开了一种附着力优良的无取向电工钢生产方法,包括以下步骤:铁水预处理、炼钢、连铸、热轧、常化酸洗、冷轧、连续退火后形成带钢、带钢经过液态涂层液涂覆、烘烤、固化形成固态绝缘涂层从而得到成品;采用本发明的生产方法生产得到的无取向电工钢绝缘涂层附着力达到GB/T2522‑2007要求中A级,其上下表面均匀性良好,涂层绝缘性能优良,可有效降低电机涡流损耗,提高电机工作效率。

Description

一种附着力优良的无取向电工钢生产方法
技术领域
本发明属于无取向电工钢绝缘涂层领域,具体涉及一种提高无取向电工钢表面绝缘涂层附着力的方法。
背景技术
无取向电工钢主要用于发电机、电动机和电讯器材等电机铁芯的制造,是电子、电力和军事工业不可缺少的含碳极低的重要软磁合金。电工钢的质量水平直接影响所制造的电机性能,其中铁损是衡量电工钢产品性能的主要指标。铁损主要包括磁滞损耗、涡流损耗和反常损耗三部分,为了减少涡流损耗在电机使用时的影响,通常采用对电工钢表面涂覆一层绝缘涂层的方法。
然而,用户在使用电工钢制造电机时,通常对电工钢成品进行分条和高速冲压,这一系列过程要对带钢实施张力,张力夹的夹紧摩擦作用和卷曲时的张力作用,使得涂层脱落现象时有发生,导致模具受损和铁芯的性能下降。因此,附着力不佳导致加工过程中涂层脱落,涂层将失去了绝缘、耐蚀等所有作用,直接影响电工钢产品质量。
发明内容
为解决上述技术问题,本发明提供了一种附着力优良的无取向电工钢生产方法。根据此生产方法得到的无取向电工钢的绝缘涂层的附着力达到GB/T2522-2007要求中的A级。
本发明采取的技术方案为:
一种附着力优良的无取向电工钢生产方法,包括以下步骤:铁水预处理、炼钢、连铸、热轧、常化酸洗、冷轧、连续退火后形成带钢、带钢经过液态涂层液涂覆、烘烤、固化形成固态绝缘涂层从而得到成品;
并控制冷轧最后一到两道次轧辊的粗糙度,使轧辊的粗糙度Ra≤0.1μm,从而确保进入涂层机的冷轧板表面粗糙度Ra控制在0.2~0.4μm或0.4~0.8μm。
进一步地,对于涂层厚度为0.3~0.5μm的薄涂层,带钢的表面粗糙度Ra控制在0.2~0.4μm;对于厚度为0.5~1μm的厚涂层,带钢的表面粗糙度Ra控制在0.4~0.8μm。
进一步地,所述热轧工艺可以为传统流程,也可以是CSP流程,更可以是薄带铸轧形成的热轧卷;所述热轧卷的厚度1.0~3.0mm。
进一步地,在所述冷轧工艺步骤中,轧辊经过1000号细砂轮研磨后,再经过刚玉粉末水溶液进行精磨,使轧辊的粗糙度Ra≤0.1μm。
进一步地,在涂层工艺步骤中,在连续退火后采用两辊辊涂机进行绝缘涂层的涂覆,刻槽辊辊径300~400mm,通过控制涂布量来实现不同厚度涂层的生产,涂覆后的带钢经过烘干和固化,形成最终产品。
进一步地,所述烘干的温度为300~500℃,时间为10~20s。
进一步地,所述固化的温度为400~600℃,时间为15~25s。
采用本发明的生产方法生产得到的无取向电工钢绝缘涂层附着力达到GB/T2522-2007要求中A级,其上下表面均匀性良好,涂层绝缘性能优良,可有效降低电机涡流损耗,提高电机工作效率。
具体实施方式
一种附着力优良的无取向电工钢生产方法,包括以下步骤:铁水预处理、炼钢、连铸、热轧、常化酸洗、冷轧、连续退火后形成带钢、带钢经过液态涂层液涂覆、烘烤、固化形成固态绝缘涂层;
所述热轧工艺可以为传统流程,也可以是CSP流程,更可以是薄带铸轧形成的热轧卷;所述热轧卷的厚度1.0~3.0mm;
在冷轧步骤中,控制冷轧最后一到两道次轧辊的粗糙度,轧辊经过1000号细砂轮研磨后,再经过刚玉粉末水溶液进行精磨,使轧辊的粗糙度Ra≤0.1μm,从而确保对于涂层厚度为0.3~0.5μm的薄涂层,带钢的表面粗糙度Ra控制在0.2~0.4μm;对于厚度为0.5~1μm的厚涂层,带钢的表面粗糙度Ra控制在0.4~0.8μm。
在涂层步骤中,在连续退火后采用两辊辊涂机进行绝缘涂层的涂覆,刻槽辊辊径300~400mm,通过控制涂布量来实现不同厚度涂层的生产,涂覆后的带钢经过300~500℃烘干10~20s,400~600℃固化15~25s,形成最终产品。
按照上述技术方案中提供的方法,制备出的无取向电工钢涂层厚度均匀,绝缘性能优良。下面通过实施例和对比例进一步说明本发明,具体见表1、表2和表3。涂层附着性按照GB/T2522-2007来评定;涂层硬度按照GB/T6739~2006在QHQ型铅笔划痕硬度仪上进行测试;层间电阻按照GB/T2522~2007规定的方法测定;耐热性通过750℃×2h,氮气保护退火评定;耐腐蚀性能按照ASTMB117规定方法测定。
表1无取向电工钢基板及涂层厚度参数
表2涂层烘干及固化温度与时间参数
表3涂层附着力及绝缘性能测试结果
从以上内容可以看出,按照本发明提供的技术方案得到的无取向电工钢的绝缘涂层附着力达到GB/T2522-2007要求中的A级,耐热性、耐腐蚀性及绝缘性能良好。
上述参照实施例对一种附着力优良的无取向电工钢生产方法进行的详细描述,是说明性的而不是限定性的,可按照所限定范围列举出若干个实施例,因此在不脱离本发明总体构思下的变化和修改,应属本发明的保护范围之内。

Claims (7)

1.一种附着力优良的无取向电工钢生产方法,其特征在于,包括以下步骤:铁水预处理、炼钢、连铸、热轧、常化酸洗、冷轧、连续退火后形成带钢、带钢经过液态涂层液涂覆、烘烤、固化形成固态绝缘涂层从而得到成品;
并控制冷轧最后一到两道次轧辊的粗糙度,使轧辊的粗糙度Ra≤0.1μm,从而确保进入涂层机的冷轧板表面粗糙度Ra控制在0.2~0.4μm或0.4~0.8μm。
2.根据权利要求1所述的生产方法,其特征在于,对于涂层厚度为0.3~0.5μm的薄涂层,带钢的表面粗糙度Ra控制在0.2~0.4μm;对于厚度为0.5~1μm的厚涂层,带钢的表面粗糙度Ra控制在0.4~0.8μm。
3.根据权利要求1所述的生产方法,其特征在于,在所述冷轧工艺步骤中,轧辊经过1000号细砂轮研磨后,再经过刚玉粉末水溶液进行精磨,使轧辊的粗糙度Ra≤0.1μm。
4.根据权利要求1所述的生产方法,其特征在于,在涂层工艺步骤中,在连续退火后采用两辊辊涂机进行绝缘涂层的涂覆,刻槽辊辊径300~400mm,通过控制涂布量来实现不同厚度涂层的生产,涂覆后的带钢经过烘干和固化,形成最终产品。
5.根据权利要求4所述的生产方法,其特征在于,所述烘干的温度为300~500℃,时间为10~20s。
6.根据权利要求4或5所述的生产方法,其特征在于,所述固化的温度为400~600℃,时间为15~25s。
7.根据权利要求1所述的生产方法,其特征在于,其特征在于,所述无取向电工钢的绝缘涂层的附着力达到GB/T2522-2007要求中的A级。
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CN114570619A (zh) * 2022-03-25 2022-06-03 马鞍山钢铁股份有限公司 无取向硅钢无铬环保涂层的厚度控制方法

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