CN108893582A - 取向电工钢的生产工艺 - Google Patents

取向电工钢的生产工艺 Download PDF

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CN108893582A
CN108893582A CN201810547249.2A CN201810547249A CN108893582A CN 108893582 A CN108893582 A CN 108893582A CN 201810547249 A CN201810547249 A CN 201810547249A CN 108893582 A CN108893582 A CN 108893582A
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oriented electrical
electrical steel
production technology
temperature
inhibitor
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宋振勇
陈天龙
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Zhejiang Zhi Cheng Thermal Molding Technology Co Ltd
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Zhejiang Zhi Cheng Thermal Molding Technology Co Ltd
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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

本发明公开了取向电工钢的生产工艺，用薄板坯连铸连轧，依次为上卷→开卷→切头→焊接→碱喷淋→碱刷洗→水刷洗→水清洗→热风干燥→入口活套→加热除油→涂层→烘干→冷却→出口活套→分切→卷取→卸卷→包装；热处理炉内温度到850‑900℃，初次再结晶，保温60秒，进行脱碳，进一步的初生晶长大，绝缘涂层退火；然后在875℃，添加抑制剂，二次再结晶，保温30分钟，再加热至1200℃，去除硫、氮。本发明生产线，在较低加热温度下保证产品磁性，采用固有抑制剂和后添加抑制剂，以确保产生完善的二次再结晶。

Description

取向电工钢的生产工艺
技术领域
本发明涉及电工钢的生产工艺，尤其涉及一种取向电工钢的生产工艺。
背景技术
电工钢是各种电器元件最重要的金属功能材料，取向电工钢是各类变压器、镇流器、放大器、稳压器、继电器、整流器、电磁开关等定向磁场电器产品制作铁芯的核心材料。取向电工钢，尤其是高磁感取向电工钢，是制造大型变压器、发电机和电动机铁芯不可或缺的材料，具有节能并大幅度减小体积和质量的优点，可满足大型核电站、水电站和火电站的需要。近年来，中国发电量较大幅度的增长和制造业的兴起，带动了取向电工钢的强劲需求。取向电工钢是一种生产工艺复杂、生产周期至少长达15天左右的产品。在过去几年中，为了简化生产工艺、缩短生产周期、降低取向电工钢的生产成本，几乎所有的生产厂都希望追求更紧凑、更廉价的生产工艺，包括采用板坯低温加热工艺代替传统的高温板坯加热工艺，采用薄板坯连铸连轧、薄带连铸工艺代替传统的连铸厚板坯—热轧工艺、用连续退火取代罩式退火。
发明内容
基于上述问题，本发明公开一种取向电工钢的生产工艺，在较低加热温度下保证产品磁性，采用固有抑制剂和后添加抑制剂，以确保产生完善的二次再结晶；
本发明所采用的技术方案如下：
取向电工钢的生产工艺，用薄板坯连铸连轧，依次为上卷→开卷→切头→焊接→碱喷淋→碱刷洗→水刷洗→水清洗→热风干燥→入口活套→加热除油→涂层→烘干→冷却→出口活套→分切→卷取→卸卷→包装；
热处理炉内温度到850-900℃，初次再结晶，保温60秒，进行脱碳，进一步的初生晶长大，绝缘涂层退火；然后在875℃，添加抑制剂，二次再结晶，保温30分钟，再加热至1200℃，去除硫、氮。
抑制剂为AlN和MnS。
进行脱碳的退火线上，向退火炉氛中注入氨气进行渗氮。
绝缘涂层退火工序中，加入含硫或氮化合物，如MnN、CrN。
进行脱碳的退火线上采用的气氛为NH3+H2+N2。
本发明生产线，在较低加热温度下保证产品磁性，采用固有抑制剂和后添加抑制剂，后添加抑制剂生产技术如果在硅钢生产的后工序加入抑制剂，原始板坯中因没有高熔点的抑制剂元素,则更容易在1150～1200℃的较低温度加热,代替了传统工艺中在1400℃加热的工艺路线；在脱碳退火线上(脱碳退火的后段)，向退火炉气氛中注入氨气(NH3)进行渗氮，或在涂退火隔离涂层工序中加入含硫或氮的化合物(如MnN、CrN化合物)，有效地加强这种抑制作用。通过在二次再结晶之前进行渗氮处理，就能形成足够的(Al,Si)N抑制剂,以确保产生完善的二次再结晶。
具体实施方式
以下详细描述本发明的技术方案。本发明实施例仅供说明具体结构，该结构的规模不受实施例的限制。
取向电工钢的生产工艺，用薄板坯连铸连轧，依次为上卷→开卷→切头→焊接→碱喷淋→碱刷洗→水刷洗→水清洗→热风干燥→入口活套→加热除油→涂层→烘干→冷却→出口活套→分切→卷取→卸卷→包装；
热处理炉内温度到850-900℃，初次再结晶，保温60秒，进行脱碳，进一步的初生晶长大，绝缘涂层退火；然后在875℃，添加抑制剂AlN和MnS，二次再结晶，保温30分钟，再加热至1200℃，去除硫、氮；在进行脱碳的退火线上，向退火炉氛中注入氨气进行渗氮；进行脱碳的退火线上采用的气氛为NH3+H2+N2；或绝缘涂层退火工序中，加入含硫或氮化合物，如MnN、CrN。
取向硅钢的制造流程设计和工艺参数调控的核心目标是在高温退火中通过二次再结晶过程形成全Goss织构(|110(<001>),初次再结晶组织中要有足够强度的Goss取向晶粒,作为二次再结晶晶核；环境具有可促进Goss取向晶粒异常长大,如细小的初次再结晶晶粒、有利的初次再结晶织构(特别是Goss晶粒毗邻的晶粒取向),如丨111|<112>、丨554丨<225>织构等；具有合适数量和尺寸的弥散分布的抑制剂(通常为MnS、AlN),以保持高温退火时升温阶段二次再结晶开始前初次再结晶晶粒细小,并在约1200T均热使抑制剂粗化分解将S、N去除。

Claims (5)

1.取向电工钢的生产工艺，其特征在于：用薄板坯连铸连轧，依次为上卷→开卷→切头→焊接→碱喷淋→碱刷洗→水刷洗→水清洗→热风干燥→入口活套→加热除油→涂层→烘干→冷却→出口活套→分切→卷取→卸卷→包装；
热处理炉内温度到850-900℃，初次再结晶，保温60秒，进行脱碳，进一步的初生晶长大，绝缘涂层退火；然后在875℃，添加抑制剂，二次再结晶，保温30分钟，再加热至1200℃，去除硫、氮。
2.根据权利要求1所述的取向电工钢的生产工艺，其特征在于所述的抑制剂为AlN和MnS。
3.根据权利要求1所述的取向电工钢的生产工艺，其特征在于进行脱碳的退火线上，向退火炉氛中注入氨气进行渗氮。
4.根据权利要求1所述的取向电工钢的生产工艺，其特征在于绝缘涂层退火工序中，加入含硫或氮化合物，如MnN、CrN。
5.根据权利要求1所述的取向电工钢的生产工艺，其特征在于进行脱碳的退火线上采用的气氛为NH3+H2+N2。
CN201810547249.2A 2018-05-31 2018-05-31 取向电工钢的生产工艺 Pending CN108893582A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110343819A (zh) * 2019-07-15 2019-10-18 中山市中圣金属板带科技有限公司 一种硅钢热处理深加工生产总装线
WO2021110945A1 (fr) * 2019-12-06 2021-06-10 Institut De Recherche Technologique Matériaux, Métallurgie, Procédés Procédé de durcissement par nitruration

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219611A1 (en) * 1985-08-15 1987-04-29 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet
CN102127708A (zh) * 2011-01-16 2011-07-20 首钢总公司 一种低温板坯加热生产取向电工钢的方法
CN102492893A (zh) * 2011-12-26 2012-06-13 武汉钢铁(集团)公司 一种用薄板坯连铸连轧生产的一般取向硅钢及其制备方法
CN107988472A (zh) * 2017-12-12 2018-05-04 武汉钢铁有限公司 一种节能的高磁感取向硅钢生产方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219611A1 (en) * 1985-08-15 1987-04-29 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet
CN102127708A (zh) * 2011-01-16 2011-07-20 首钢总公司 一种低温板坯加热生产取向电工钢的方法
CN102492893A (zh) * 2011-12-26 2012-06-13 武汉钢铁(集团)公司 一种用薄板坯连铸连轧生产的一般取向硅钢及其制备方法
CN107988472A (zh) * 2017-12-12 2018-05-04 武汉钢铁有限公司 一种节能的高磁感取向硅钢生产方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110343819A (zh) * 2019-07-15 2019-10-18 中山市中圣金属板带科技有限公司 一种硅钢热处理深加工生产总装线
WO2021110945A1 (fr) * 2019-12-06 2021-06-10 Institut De Recherche Technologique Matériaux, Métallurgie, Procédés Procédé de durcissement par nitruration
FR3104176A1 (fr) * 2019-12-06 2021-06-11 Institut De Recherche Technologique Matériaux, Métallurgie, Procédés Procédé de durcissement par nitruration

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