CN114774789B - 板形优异宽幅电工纯铁热轧板及其制造方法 - Google Patents
板形优异宽幅电工纯铁热轧板及其制造方法 Download PDFInfo
- Publication number
- CN114774789B CN114774789B CN202210465141.5A CN202210465141A CN114774789B CN 114774789 B CN114774789 B CN 114774789B CN 202210465141 A CN202210465141 A CN 202210465141A CN 114774789 B CN114774789 B CN 114774789B
- Authority
- CN
- China
- Prior art keywords
- equal
- less
- rolling
- pure iron
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000005096 rolling process Methods 0.000 claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 6
- 238000010583 slow cooling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 238000013000 roll bending Methods 0.000 claims description 3
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 claims description 2
- 230000005291 magnetic effect Effects 0.000 abstract description 26
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000137 annealing Methods 0.000 abstract description 4
- 238000005097 cold rolling Methods 0.000 abstract description 3
- 230000005415 magnetization Effects 0.000 abstract description 3
- 230000006698 induction Effects 0.000 description 8
- 239000006104 solid solution Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 239000002889 diamagnetic material Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
-
- 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
-
- 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
- B21B2001/225—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 hot-rolling
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
本发明涉及板形优异宽幅电工纯铁热轧板,化学成分按重量百分比计:C:0.001%~0.005%,Si≤0.01%,Mn≤0.5%,Sr:0.003%~0.05%,Mg:0.003%~0.05%,N:0.003%~0.020%,P≤0.015%,S≤0.01%,Mg/N≥1.5;Sr/S≥2,Al:0.5%~1.0%,余量为Fe和不可避免的杂质。本发明不用Al脱氧,转炉改用Sr和Mg脱氧脱硫,Sr/S≥2才能保证Sr的脱硫效果。用Al实现铁素体区轧制,晶粒粗化,采用该发明生产的电工纯铁热轧钢板无需冷轧和磁化退火,晶粒粗大,晶粒度0~2级,硬度小于90HV。氧化Al夹杂物2~2.5级,存在大量均匀分布30~150nm的长棒状MgN夹杂相,面积百分比0.003%~0.010%,最大矫顽力≤50A/m,最大磁导率≥0.0110H/m,电工性能优异;1200mm以上宽幅热卷无需矫直,钢卷开平后波浪度不大于0.6S。
Description
技术领域
本发明涉及电工纯铁热轧板特别涉及一种板形优异宽幅电工纯铁热轧板及其制造方法。
背景技术
纯铁、钢和生铁的区别主要在于铁中的含碳量不同。工业纯铁是钢的一种,其化学成分主要是铁,含量在99.50%-99.90%,含碳量在0.04%以下,其他元素愈少愈好。因为它实际上还不是真正的纯铁,所以称这一种接近于纯铁的钢为工业纯铁。一般工业纯铁强度低,韧性特别大,电工性能好。工业纯铁根据用途分为:电工纯铁、原料纯铁、无发纹纯铁、高真空气密性纯铁等。随着我国新能源汽车、电器元件加工等行业发展,电工纯铁用量越来越大,供不应求。常见的电工纯铁有两种,一种是作为深冲材料的,可以冲压成极复杂的形状;另一种是作为电工材料的,有高的感磁性的低的抗磁性广泛用于电子电工,电器元件,磁性材料,非晶体制品,继电器,传感器,汽车制动器,纺机,电表电工阀等等产品。
电工纯铁钢板一般生产工艺:冶炼-热轧-冷轧-磁化退火。依据磁化退火后磁性能,电工纯铁划分为普级、高级、特级、超级。最小磁感应强度BT:B200A/m~B10000A/m时分别达1.2~1.8,抗拉强度最大265MPa,延伸率最小25%,硬度≤195HV5。级别从低到高最大矫顽力Hc:96A/m~32A/m,矫顽力时效增值△Hc:9.6A/m~4A/m,最大磁导率μm:0.0075H/m~0.0151H/m。
电工纯铁成分无明确规定,但一般要求:C≤0.010%,Si≤0.10%,Mn≤0.25%,P≤0.015,S≤0.010%,Ti≤0.02%,Cr≤0.10%,Ni≤0.05%,Cu≤0.05%。现有电工纯铁钢板主要有宝钢的不含Al电工纯铁和太钢的高Al电工纯铁两种,两种成分体系电工纯铁的屈服强度最高300MPa,抗拉强度最高400MPa。
随着时代发展及工业进步,对电工纯铁的使用要求越来越高,除了要求磁性能外,加工的零件规格尺寸越来越大,比如大型电站的设备外壳等,因此对钢板宽度和板形要求越来越高。纯铁强度低,易轧制,但很容易变形,特别是宽规格板形更不好控制。热轧后需要矫直才能使用,成本高。
发明内容
本发明所要解决的技术问题是提供一种板形优异宽幅电工纯铁热轧板及其制造方法,解决电工纯铁钢板宽度小,板形不好,浪形大的技术问题。钢板无需矫直,板形良好。
为实现上述目的,本发明采用以下技术方案实现:
板形优异宽幅电工纯铁热轧板,化学成分按重量百分比计:C:0.001%~0.005%,Si≤0.01%,Mn≤0.5%,Sr:0.003%~0.05%,Mg:0.003%~0.05%,N:0.003%~0.020%,P≤0.015%,S≤0.01%,Mg/N≥1.5;Sr/S≥2,Al:0.5%~1.0%,余量为Fe和不可避免的杂质。
板形优异宽幅电工纯铁热轧板的宽度为1200mm以上。
板形优异宽幅电工纯铁热轧板波浪度不大于0.6S,硬度小于90HV,最大矫顽力≤50A/m,最大磁导率≥0.0110H/m。
合金成分作用机理:
C、N、S都是提高矫顽力元素,为保磁性能,这些成分含量越低越好,但本发明为保证抗拉强度,要求C含量0.001%~0.003%,少量固溶碳在钢基体中提升强度。
Si是钢中常见元素之一,在炼钢过程中用作还原剂和脱氧剂,固溶形态的Si能提高韧脆转变温度,为具有良好成型性,Si:≤0.01%。
Mn是钢中常见元素之一,在炼钢过程中用作脱氧剂,为保证磁性能,Mn:≤0.5%。
用Sr脱氧脱硫,Sr:0.003~0.05%,同时固溶在钢中的Sr还能阻碍晶粒细化,得到粗大的铁素体晶粒,硬度小于90HV,电工性能优异。Sr/S≥2,才能保证Sr的脱硫效果和固溶作用,保证钢中硫充分与Sr反应生产SrS化物上浮成渣从钢液中析出后剩余Sr的固溶及阻碍晶粒细化作用。固溶的Sr还能形成大量位错密度,提升抗拉强度,减小屈强比,降低矫顽力,提高磁导率。
Mg是良好脱氧剂。本发明中Mg与氧生成大颗粒非金属夹杂物,提升磁感性能。0.003~0.05%的Mg和Sr共同与氧反应,使钢中夹杂物级达2级~2.5级,降矫顽力,提磁导率。另一方面用Mg脱N,避免N与AL生成AlN影响磁感性能。Mg/N≥1.5才能保证充分脱N,生成30~150nm的长棒状MgN夹杂相,面积百分比0.003%~0.010%,阻碍再结晶,提磁导率。另一方面Mg与N生成的细长氮化物夹杂相还可以避免N与AL生成AlN影响磁感性能。
N可改善钢韧性和焊接性能,但是N与AL易生成AlN影响磁感性能。本发明高Al,因此要严格控N,N≤0.020%。利用N与Mg生成氮化物夹杂相,一方面直接提磁导率,另一方面用Mg脱N,避免N与AL生成AlN影响磁感性能。Mg/N≥1.5才能保证生成30~150nm的长棒状MgN夹杂相,面积百分比0.003%~0.010%,充分脱N,避免N与AL生成AlN影响磁感性能。因此,控制钢水中N含量小于0.020%。
利用Al改变钢的相变温度,提高相变温度,使热轧不发生相变,铁素体轧制,板形好,而且无相变应力,晶粒粗大,矫顽力小,磁导率高。Al:0.5~1.0%,Al含量过多易生成氧化铝夹杂,影响矫顽力和磁导率等磁性能。Al含量过低,奥氏体轧制,晶粒再结晶细小,磁性能不好,且板形不好控制。
板形优异宽幅电工纯铁热轧板的制造方法,转炉冶炼、双电炉精炼、铸坯、热轧、卷取冷却;具体包括:
1)转炉采用Sr、Mg脱硫脱氧;
2)ANS-OB法精炼,采用铝吹氧升温,升温速度4℃/min~10℃/min。
3)VD炉精炼,按成分调整碳含量,保压10分钟以上;
4)铸坯:连铸拉速1.0~1.4m/min,过热度25℃以上;
5)铸坯处理:铸坯热装,入炉温度500℃以上;
6)轧制:粗轧采用双立辊+双水平辊轧制,板坯粗轧3~5道次,每道次压下率≤20%,轧制温度1050℃~1200℃,最大轧制力50000KN,轧制速度2m/s~6m/s;精轧采用工作辊轴向窜动和弯辊装置,精轧5~7道次连轧,每道次压下率≤20%,最大轧制力35000KN,轧制速度10m/s~30m/s,精轧温度680~750℃;对带钢平直度板形进行控制;
7)卷取冷却:终轧后采用带间隔120度分布全液压式助卷辊的卷取机卷取,卷筒最大电机功率1500kW,助卷辊最大电机功率150kW;加热到900~950℃保温1~2分钟,再次反向卷取,900~950℃保温2~4分钟,出热卷取箱再入缓冷坑缓冷72小时以上,冷速10℃/小时~30℃/小时,控制板形。
步骤6)所述的板坯厚度200~300mm。
与现有的技术相比,本发明的有益效果是:
本发明不用Al脱氧,转炉改用Sr和Mg脱氧脱硫,Sr/S≥2才能保证Sr的脱硫效果。用Al实现铁素体区轧制,晶粒粗化,采用该发明生产的电工纯铁热轧钢板无需冷轧和磁化退火,晶粒粗大,晶粒度0~2级,硬度小于90HV。氧化Al夹杂物2~2.5级,存在大量均匀分布30~150nm的长棒状MgN夹杂相,面积百分比0.003%~0.010%,最大矫顽力≤50A/m,最大磁导率≥0.0110H/m,电工性能优异;1200mm以上宽幅热卷无需矫直,钢卷开平后波浪度不大于0.6S(S为两个相临波峰或波谷间距离)。
具体实施方式
下面结合实施例对本发明进一步说明:
以下实施例对本发明进行详细描述。这些实施例仅是对本发明的最佳实施方案进行描述,并不对本发明的范围进行限制。
板形优异宽幅电工纯铁热轧板及其制造方法,解决电工纯铁钢板宽度小,板形不好,浪形大的技术问题。
板形优异宽幅电工纯铁热轧板,化学成分按重量百分比计为:C:0.001%~0.005%,Si≤0.01%,Mn≤0.5%,Sr:0.003%~0.05%,Mg:0.003%~0.05%,N:0.003%~0.020%,P≤0.015%,S≤0.01%,Mg/N≥1.5;Sr/S≥2,Al:0.5%~1.0%,余量为Fe和不可避免的杂质。
板形优异宽幅电工纯铁热轧板的宽度1200mm以上。
板形优异宽幅电工纯铁热轧板波浪度不大于0.6S,硬度小于90HV。
电工纯铁热轧板的制造方法,转炉冶炼、双电炉精炼、铸坯、热轧、卷取冷却;具体包括:
1)转炉采用Sr、Mg脱硫脱氧;使钢中硫充分与Sr反应生产SrS化物上浮成渣从钢液中析出,减少凝固后钢中硫含量到0.01%以下;本发明转炉不用Al脱氧,转炉改用Sr和Mg脱氧脱硫,Sr/S≥2才能保证Sr的脱硫效果,使钢中硫充分与Sr反应生产SrS化物上浮成渣从钢液中析出,减少凝固后钢中硫含量到0.01%以下。同时剩余的Sr固溶在钢中还能提升抗拉强度,阻碍晶粒细化,得到粗大的铁素体晶粒。Mg是较活泼金属,本发明用Mg脱氧,夹杂易上浮。
2)ANS-OB法精炼,采用铝吹氧升温,升温速度4℃/min~10℃/min,升温速度快,生产效率高;Mg脱氧,夹杂易上浮,到氧含量小于0.0050%时,再加大量Al;避免氧与Al生产大夹杂物堵结晶器水口,引起浇注断流。
3)VD炉精炼,按成分调整碳含量,保压10分钟以上;脱碳,给Mg的氧化物夹杂聚集形成大颗粒夹杂提供条件;
4)铸坯:连铸拉速1.0~1.4m/min,过热度25℃以上,避免堵水口断流;促进柱状晶形成,以便轧制后形成粗大铁素体组织,同时降低矫顽力,提高磁导率。
5)铸坯处理:铸坯热装,入炉温度500℃以上;避免高Al铸坯应力大,断裂;
6)轧制:板坯厚度200~300mm,粗轧采用双立辊+双水平辊轧制,3~5道次,每道次压下率≤20%,最大轧制力50000KN,轧制速度2m/s~6m/s,轧制温度1050℃~1200℃,尽量减少再结晶,避免晶粒细化,控制轧制力和轧速得到优良板形;精轧采用工作辊轴向窜动和弯辊装置,精轧5~7道次连轧,每道次压下率≤20%,最大轧制力35000KN,轧制速度10m/s~30m/s,精轧温度680-750℃;高Al钢铁素体区轧制,无奥氏体再结晶,以得到粗大等轴铁素体晶粒,晶粒度0~2级,等轴铁素体晶粒大,同时促进长棒状MgN相生成,Sr固溶强化作用下形成大量位错密度,提升抗拉强度,减小屈强比,MgN相和大量位错密度还能降低矫顽力,提高磁导率。控制粗精轧轧制力和轧制速度、每道次压下率,控制板形平直度,使钢卷无需矫直,直接开平后波浪度不大于0.6S。
7)卷取冷却:终轧后直接热卷取,热卷取带加热装置,加热到900~950℃保温1~2分钟,晶粒回复长大,再次反向卷取,900~950℃保温2~4分钟,控制板形,使钢卷无需矫直,直接开平后波浪度不大于0.6S。出热卷取箱再入缓冷坑缓冷72小时以上,冷速10℃/小时~30℃/小时,去应力控制板形,硬度小于90HV,促进前期生成的大量MgN夹杂相长大到30~150nm的长棒状,占总面积百分比0.003%~0.010%,降低最大矫顽力到≤50A/m,提高最大磁导率到≥0.0110H/m。采用带3个均匀分布(间隔120度)全液压式助卷辊的卷取机卷取,卷筒最大电机功率1500kW,助卷辊最大电机功率150kW,控制板形平直度,使钢卷无需矫直,直接开平后波浪度不大于0.6S。
实施例
表1:化学成分,%
表2:生产工艺
表3:钢板性能
Claims (4)
1.板形优异宽幅电工纯铁热轧板,其特征在于,化学成分按重量百分比计:C:0.001%~0.005%,Si≤0.01 % , Mn≤ 0.5 %,Sr:0.003%~0.05%,Mg:0.003%~0.05%,N:0.003%~0.020%, P ≤0.015%,S ≤0.01%,Mg/N≥1.5;Sr/S≥2,Al:0.5%~1.0%,余量为Fe和不可避免的杂质,所述的板形优异宽幅电工纯铁热轧板的制造方法,转炉冶炼、双电炉精炼、铸坯、热轧、卷取冷却;具体包括:
1)转炉采用Sr、Mg脱硫脱氧;
2) ANS-OB法精炼,采用铝吹氧升温,升温速度4℃/min~10℃/min。
3)VD炉精炼,按成分调整碳含量,保压10分钟以上;
4)铸坯:连铸拉速1.0~1.4m/min,过热度25℃以上;
5)铸坯处理:铸坯热装,入炉温度500℃以上;
6)轧制:粗轧采用双立辊+双水平辊轧制,板坯粗轧3~5道次,每道次压下率≤20%,轧制温度1050℃~1200℃,最大轧制力50000KN,轧制速度2m/s~6m/s;精轧采用工作辊轴向窜动和弯辊装置,精轧5~7道次连轧,每道次压下率≤20%,最大轧制力35000KN,轧制速度10m/s~30m/s,精轧温度680~750℃;对带钢平直度板形进行控制;
7)卷取冷却:终轧后采用带有间隔120°分布全液压式助卷辊的卷取机卷取,卷筒最大电机功率1500kW ,助卷辊最大电机功率150kW;加热到900~950℃保温1~2分钟,再次反向卷取,900~950℃保温2~4分钟,出热卷取箱再入缓冷坑缓冷72小时以上,冷速10℃/小时~30℃/小时,控制板形。
2.根据权利要求1所述的板形优异宽幅电工纯铁热轧板,其特征在于,宽度为1200mm以上。
3.根据权利要求1所述的板形优异宽幅电工纯铁热轧板,其特征在于,电工纯铁热轧板波浪度不大于0.6S,硬度小于90HV,最大矫顽力≤50A/m,最大磁导率≥0.0110H/m。
4.根据权利要求1所述的板形优异宽幅电工纯铁热轧板的制造方法,其特征在于,步骤6)所述的板坯厚度200~300mm。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210465141.5A CN114774789B (zh) | 2022-04-29 | 2022-04-29 | 板形优异宽幅电工纯铁热轧板及其制造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210465141.5A CN114774789B (zh) | 2022-04-29 | 2022-04-29 | 板形优异宽幅电工纯铁热轧板及其制造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114774789A CN114774789A (zh) | 2022-07-22 |
CN114774789B true CN114774789B (zh) | 2023-04-14 |
Family
ID=82435321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210465141.5A Active CN114774789B (zh) | 2022-04-29 | 2022-04-29 | 板形优异宽幅电工纯铁热轧板及其制造方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114774789B (zh) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1054400C (zh) * | 1998-07-31 | 2000-07-12 | 宝山钢铁(集团)公司 | 具有粗大晶粒组织的冷轧纯铁板的生产方法 |
CN104073714A (zh) * | 2013-03-28 | 2014-10-01 | 宝山钢铁股份有限公司 | 表面良好的高磁感低铁损无取向电工钢板及其制造方法 |
CN103205548B (zh) * | 2013-04-16 | 2015-02-25 | 山西太钢不锈钢股份有限公司 | 一种低矫顽力电磁纯铁冷轧薄板的制造方法 |
CN104451390A (zh) * | 2014-11-19 | 2015-03-25 | 钢铁研究总院 | 一种表层超细贝氏体船用耐蚀钢及其制造方法 |
CN105950992B (zh) * | 2016-07-11 | 2018-05-29 | 钢铁研究总院 | 一种采用一次冷轧法制造的晶粒取向纯铁及方法 |
JP6879341B2 (ja) * | 2018-08-23 | 2021-06-02 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
JP7284383B2 (ja) * | 2019-02-28 | 2023-05-31 | 日本製鉄株式会社 | 無方向性電磁鋼板 |
-
2022
- 2022-04-29 CN CN202210465141.5A patent/CN114774789B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN114774789A (zh) | 2022-07-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7159311B2 (ja) | 磁気特性に優れる無方向性電磁鋼板およびその製造方法 | |
KR20180135949A (ko) | 고-자기-유도 저-철-손실 무방향성 실리콘 강판 및 이의 제조 방법 | |
CN105112776A (zh) | 一种含磷低碳冷轧硬质镀锡钢板及其生产方法 | |
CN111206189B (zh) | 一种550MPa级油管用热轧酸洗钢带及其制造方法 | |
CN105803324B (zh) | 一种屈服强度450MPa级高磁感低成本冷轧磁极钢及其制造方法 | |
WO2021057197A1 (zh) | 一种耐候桥梁用焊丝钢的轧制工艺 | |
CN109822070B (zh) | 一种薄板坯全无头轧制电驱动用无取向电工钢及制备方法 | |
CN100372964C (zh) | 无取向电工钢及其制造方法 | |
CN113755750B (zh) | 一种含磷高磁感无取向硅钢的生产方法 | |
CN112143964A (zh) | 一种极低铁损的无取向电工钢板及其连续退火工艺 | |
CN102676913B (zh) | 药芯焊丝用冷轧带钢及其制造方法 | |
CN111719078B (zh) | 一种消除瓦楞状缺陷的无取向硅钢生产方法 | |
CN109182907B (zh) | 一种无头轧制生产半工艺无取向电工钢的方法 | |
CN114774789B (zh) | 板形优异宽幅电工纯铁热轧板及其制造方法 | |
CN110640104B (zh) | 一种磁性能优良的无取向电工钢板及其制造方法 | |
CN103436778A (zh) | 具有低温韧性药芯焊丝用冷轧带钢及其生产方法 | |
CN115198203B (zh) | 一种免常化中间退火的无取向电工钢板及其制造方法 | |
US20230416883A1 (en) | Non-oriented electrical steel plate and manufacturing method therefor | |
CN110747324B (zh) | 一种改善高牌号无取向硅钢磁各向异性的方法 | |
CN103627953A (zh) | 一种对等温时间不敏感的含铝复相钢及其生产方法 | |
CN114752861B (zh) | 一种低屈强比电工纯铁热轧板及其制造方法 | |
CN102828126A (zh) | 一种屈服强度1200MPa级高强韧厚板及其生产方法 | |
CN115704073B (zh) | 一种表面状态良好的无取向电工钢板及其制造方法 | |
CN111961980B (zh) | 一种csp流程无常化工艺生产薄规格中高牌号无取向硅钢的方法 | |
CN116024420B (zh) | 一种高磁感取向硅钢及其制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |