CN113020911A - 一种奥氏体不锈钢亚光产品的制备方法 - Google Patents

一种奥氏体不锈钢亚光产品的制备方法 Download PDF

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CN113020911A
CN113020911A CN202110272073.6A CN202110272073A CN113020911A CN 113020911 A CN113020911 A CN 113020911A CN 202110272073 A CN202110272073 A CN 202110272073A CN 113020911 A CN113020911 A CN 113020911A
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stainless steel
rolling
coil
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annealing
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CN113020911B (zh
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杜海宪
袁海永
林俊俊
吴九荣
任晟
周自杰
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Ningbo Baoxin Stainless Steel Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/22Metal-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
    • 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/22Metal-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
    • B21B2001/221Metal-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2261/00Product parameters
    • B21B2261/14Roughness
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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  • Mechanical Engineering (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

本发明公开了一种奥氏体不锈钢亚光产品的制备方法,其特征在于,包括以下工艺流程步骤:1)不锈钢黑皮热卷退火酸洗;2)粗轧;3)粗研磨;4)中间轧制;5)不锈钢冷卷退火酸洗;6)毛面轧制:使用表面粗糙度Ra为2.0~3.0μm的毛化轧辊,对带钢进行毛面轧制,轧制率为3~20%,轧制速度≤200mpm;7)不锈钢冷卷退火酸洗钝化:所述退火温度为1050~1120℃,采用HNO3和HF的混合酸对退火后的亚光毛面进行酸洗钝化,所述HNO3浓度为80~150g/L,HF浓度为10~25g/L。本发明制备得到的钢卷的粗糙度Ra≤1.5μm,光反射度:20°方向,≤20gu;60°方向,≤60gu。

Description

一种奥氏体不锈钢亚光产品的制备方法
技术领域
本发明属于不锈钢加工技术领域,具体涉及一种奥氏体不锈钢亚光产品的制备方法。
背景技术
为保证美观和避免光污染,大型建筑屋顶等需要一种低反射度的亚光不锈钢毛面产品。该毛面产品常规工艺是:经过一系列冷轧工序的加工,然后用一定粗糙度的毛面轧辊轧制出特定的粗糙度,然后再经过脱脂或光亮退火等处理,但该工艺存在钢卷头尾光泽度差异较大或表面光反射度较大等问题。
目前用户需要亚光毛面产品表面均匀,反射度较低,钢卷头尾光反射度均匀、不能出现钢卷长度方向上光反射度差异较大等问题。
为解决原亚光毛面产品存在的问题,充分满足用户需求,需要针对现有的亚光毛面产品的工艺进一步进行改进。
发明内容
本发明所要解决的技术问题是提供一种反射度低且钢卷头尾光反射度均匀的奥氏体不锈钢亚光产品的制备方法。
本发明解决上述技术问题所采用的技术方案为:一种奥氏体不锈钢亚光产品的制备方法,其特征在于,包括以下工艺流程步骤:
1)不锈钢黑皮热卷退火酸洗;
2)粗轧;
3)粗研磨;
4)中间轧制;
5)不锈钢冷卷退火酸洗;
6)毛面轧制:使用表面粗糙度Ra为2.0~3.0μm的毛化轧辊,对带钢进行毛面轧制,轧制率为3~20%,轧制速度≤200mpm;
7)不锈钢冷卷退火酸洗钝化:所述退火温度为1050~1120℃,采用HNO3和HF的混合酸对退火后的亚光毛面进行酸洗钝化,所述HNO3浓度为80~150g/L,HF浓度为10~25g/L;
8)拉弯矫直。
将毛化轧辊的表面粗糙度控制在Ra为2.0~3.0μm,控制轧制率为3~20%和轧制速度≤200mpm能够防止毛化轧辊粗糙度衰减快。
HNO3浓度为80~150g/L,HF浓度为10~25g/L的混合酸对退火后的毛面不锈钢进行酸洗钝化,可提高毛面钝化效果,得到亚光表面产品。
作为优选,所述步骤1)中退火温度为1050~1120℃。
作为优选,所述步骤2)中粗轧压下率为10~40%。
作为优选,制备得到的钢卷的粗糙度Ra≤1.5μm,光反射度:20°方向,≤20gu;60°方向,≤60gu,钢卷头尾20°方向上的光反射度偏差控制在40%之内;钢卷头尾60°方向上的光反射度偏差控制在20%之内;钢卷头尾粗糙度Ra的偏差控制在10%之内。
作为优选,本发明奥氏体不锈钢的质量百分组成为:≤0.08wt%C、≤1.0wt%Si、≤2.0wt%Mn、≤0.045wt%P、≤0.030wt%S、Ni:8.00~10.50wt%、Cr:18.00~20.00wt%,余量为Fe和不可避免的杂质。
作为优选,制备得到的钢卷的抗拉强度≥600MPa,屈服强度≥250MPa,延伸率≥50%。
与现有技术相比,本发明的优点在于:
1)毛面产品轧制过程中,在一定轧制力的作用下,毛化轧辊粗糙度不可避免出现衰减,导致钢卷长度方向上的粗糙度逐渐变小,本发明采用毛面轧制+退火酸洗钝化,并通过控制毛化轧辊的粗糙度、轧制速度、退火温度以及混合酸的浓度等在满足强度的同时最终实现钢卷表面粗糙度衰减慢,反射度低且钢卷头尾光反射度均匀的奥氏体不锈钢亚光产品。
2)本发明制备得到的钢卷的粗糙度Ra≤1.5μm,光反射度:20°方向,≤20gu;60°方向,≤60gu,钢卷头尾20°方向上的光反射度偏差控制在40%之内;钢卷头尾60°方向上的光反射度偏差控制在20%之内;钢卷头尾粗糙度Ra的偏差控制在10%之内。
具体实施方式
以下结合实施例对本发明作进一步详细描述。
实施例1至实施例5为采用本发明的方法制备的奥氏体不锈钢亚光产品,具体成分见表1,包括以下工艺流程步骤:
1)将不锈钢黑皮热卷退火酸洗,不锈钢的规格为厚度3.0mm*宽度1250mm;
2)粗轧:将不锈钢粗轧至厚度为2.0mm;
3)粗研磨:使用一定粒度的研磨砂带,对钢卷表面进行研磨,去除表面的缺陷;
4)中间轧制:将不锈钢的厚度从2.0mm轧制0.6mm;
5)不锈钢冷卷退火酸洗;
6)毛面轧制;使用毛化轧辊将不锈钢的厚度从0.6mm轧制至不同厚度,
7)不锈钢冷卷退火酸洗钝化;
8)拉弯矫直:经拉弯矫直后,改善板形,边浪≤5mm。
对比例的成分与本实施例相同,采用与实施例1相同粗糙度的毛面轧辊轧制,然后通过光亮退火处理得到最终的不锈钢毛面产品。
偏差计算公式为:偏差=(尾部-头部)/头部。
表1本发明实施例的化学成分(wt%)
牌号 C Si Mn P S Ni Cr N Fe
实施例 0.047 0.52 1.08 0.033 0.003 8.01 18.07 0.044 余量
表2本发明实施例的关键工艺参数控制
Figure BDA0002974656180000031
表3本发明实施例和对比例的性能
Figure BDA0002974656180000041

Claims (4)

1.一种奥氏体不锈钢亚光产品的制备方法,其特征在于,包括以下工艺流程步骤:
1)不锈钢黑皮热卷退火酸洗;
2)粗轧;
3)粗研磨;
4)中间轧制;
5)不锈钢冷卷退火酸洗;
6)毛面轧制:使用表面粗糙度Ra为2.0~3.0μm的毛化轧辊,对带钢进行毛面轧制,轧制率为3~20%,轧制速度≤200mpm;
7)不锈钢冷卷退火酸洗钝化:所述退火温度为1050~1120℃,采用HNO3和HF的混合酸对退火后的亚光毛面进行酸洗钝化,所述HNO3浓度为80~150g/L,HF浓度为10~25g/L;
8)拉弯矫直。
2.根据权利要求1所述的奥氏体不锈钢亚光产品的制备方法,其特征在于:所述步骤1)中退火温度为1050~1120℃。
3.根据权利要求1所述的奥氏体不锈钢亚光产品的制备方法,其特征在于:所述步骤2)中粗轧压下率为10~40%。
4.权利要求1至3任一权利要求所述的奥氏体不锈钢亚光产品的制备方法,其特征在于:制备得到的钢卷的粗糙度Ra≤1.5μm,光反射度:20°方向,≤20gu;60°方向,≤60gu,钢卷头尾20°方向上的光反射度偏差控制在40%之内;钢卷头尾60°方向上的光反射度偏差控制在20%之内;钢卷头尾粗糙度Ra的偏差控制在10%之内。
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Cited By (1)

* Cited by examiner, † Cited by third party
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CN114653773A (zh) * 2022-03-15 2022-06-24 宁波宝新不锈钢有限公司 轨道交通载具用不锈钢研磨品的加工方法

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CN107983770A (zh) * 2016-10-27 2018-05-04 福建宏旺实业有限公司 一种不锈钢的热酸洗生产工艺
CN108950159A (zh) * 2018-06-22 2018-12-07 宁波宝新不锈钢有限公司 一种冷轧sus304双面ba表面不锈钢的制造方法

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CN103459055B (zh) * 2011-03-31 2016-05-18 日新制钢株式会社 不锈钢板及其制造方法
CN107405655A (zh) * 2015-04-03 2017-11-28 日新制钢株式会社 奥氏体系不锈钢板、盖部件和奥氏体系不锈钢板的制造方法
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114653773A (zh) * 2022-03-15 2022-06-24 宁波宝新不锈钢有限公司 轨道交通载具用不锈钢研磨品的加工方法
CN114653773B (zh) * 2022-03-15 2024-01-12 宁波宝新不锈钢有限公司 轨道交通载具用不锈钢研磨品的加工方法

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