JPH01219124A - Production of non-oriented electrical steel sheet having excellent pickling property - Google Patents
Production of non-oriented electrical steel sheet having excellent pickling propertyInfo
- Publication number
- JPH01219124A JPH01219124A JP4183688A JP4183688A JPH01219124A JP H01219124 A JPH01219124 A JP H01219124A JP 4183688 A JP4183688 A JP 4183688A JP 4183688 A JP4183688 A JP 4183688A JP H01219124 A JPH01219124 A JP H01219124A
- Authority
- JP
- Japan
- Prior art keywords
- annealing
- steel sheet
- oriented electrical
- sheet
- self
- 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.)
- Granted
Links
- 238000005554 pickling Methods 0.000 title claims abstract description 15
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000137 annealing Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000005097 cold rolling Methods 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 229910000976 Electrical steel Inorganic materials 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 18
- 230000003647 oxidation Effects 0.000 description 18
- 238000007254 oxidation reaction Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000006866 deterioration Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 3
- 235000021110 pickles Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying 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
- C21D8/1222—Hot rolling
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、酸洗性に優れた無方向性電磁鋼板の製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a non-oriented electrical steel sheet with excellent pickling properties.
無方向性電磁鋼板の製造において、省エネルギー、省工
程、コスト低減を目的として、磁気特性向上のための熱
延板焼鈍を省略し。In the production of non-oriented electrical steel sheets, we omit hot-rolled sheet annealing to improve magnetic properties in order to save energy, save processes, and reduce costs.
その効果を高温巻取によるコイルの自己焼鈍で代替させ
ようとする技術が知られている。A technique is known in which this effect is replaced by self-annealing of the coil by high-temperature winding.
しかし、Ｓｌ、Ａｌ含有鋼を高温巻取した場合。However, when steel containing Sl and Al is coiled at high temperature.
Ｓｉ、Ａｌの選択酸化に起因して熱延板表層下に内部酸
化層が生成する。このような内部酸化層は非常に酸洗さ
れ難い丸め、酸洗に長時間を要し、また長時間酸洗して
も完全には除去されず、残存した内部酸化層に起因して
環路焼鈍後の磁気特性、特に鉄損の劣化を招いてしまう
。An internal oxidation layer is formed under the surface layer of the hot rolled sheet due to selective oxidation of Si and Al. This kind of internal oxidation layer is very difficult to pickle, it takes a long time to pickle, and even if it is pickled for a long time, it is not completely removed, and the remaining internal oxidation layer causes the ring passage. This results in deterioration of magnetic properties, especially iron loss, after annealing.
従来、熱延板の自己焼鈍に関し鋼板の酸洗性を問題にし
た提案がいくつかなされているが、熱延板中の内部酸化
層自体による鉄損の劣化防止という観点に基づく提案は
未だない。In the past, several proposals have been made regarding self-annealing of hot-rolled sheets that address the issue of pickling properties of steel sheets, but so far there have been no proposals based on the perspective of preventing deterioration of iron loss due to the internal oxidation layer itself in hot-rolled sheets. .
内部酸化層の生成を防止するには・例えば特開昭５６−
３３４３６号に示されるように高温巻取後、保熱カバー
内で自己焼鈍させ、しかもその雰囲気にイナートガスを
使用する方法が考えられるが、この方法では深熱カバー
の装脱着のための余分な工程が必要なだけでなく、多量
のイナートガスが必要〈なり、コスト面で熱延板焼鈍を
省略するメリットがなくなってしまう。To prevent the formation of internal oxidation layer - For example, JP-A-56-
As shown in No. 33436, a method of self-annealing within a heat insulating cover after high-temperature winding and using inert gas in the atmosphere is considered, but this method requires an extra process for attaching and detaching the deep heat cover. Not only is this necessary, but also a large amount of inert gas is required, which eliminates the cost advantage of omitting hot-rolled sheet annealing.
本発明は、このような問題に鑑み、熱延板の自己焼鈍に
よる内部酸化層の生成を抑え。In view of these problems, the present invention suppresses the formation of an internal oxidation layer due to self-annealing of hot rolled sheets.
熱延板の内部酸化層に起因した鉄損の劣化を効果的に防
止することができる方法を提供せんとするものである。It is an object of the present invention to provide a method that can effectively prevent the deterioration of iron loss caused by the internal oxidation layer of a hot rolled sheet.
本発明は、熱間圧延時の内部酸化層の生成及び製品の磁
気特性に対する巻取温度の影響を検討した結果、鋼中の
Ｓｉ＋Ａｌ量に対し適当な巻取温度を選択することによ
シ、内部酸化層の生成とこれに伴う鉄損の劣化を効果的
に抑えることができることを見い出し、かかる知見に基
づきなされたもので、その特徴とするところは、Ｃ：０
．０３ｗｔ％以下、Ｓｉ：１．０〜４．０ｗｔ％、Ａｌ
： ０．０１〜２．０ｗｔ ｉｒを含むスラブを熱間圧
延した後、酸洗し、次いで１回の冷間圧延または中間焼
鈍をはさむ２回以上の冷間圧延を実施した後、仕上焼鈍
を行うに当り。As a result of studying the effects of coiling temperature on the formation of an internal oxide layer during hot rolling and the magnetic properties of the product, the present invention has been developed by selecting an appropriate coiling temperature for the amount of Si + Al in the steel. It was discovered that the formation of an internal oxidation layer and the accompanying deterioration of iron loss can be effectively suppressed, and it was made based on this knowledge, and its characteristics are as follows:
．． 03 wt% or less, Si: 1.0 to 4.0 wt%, Al
: After hot rolling a slab containing 0.01 to 2.0 wt ir, pickling, then one cold rolling or two or more cold rollings with intermediate annealing in between, and then final annealing. To do it.
熱間圧延後の鋼板を下式を満足するよう巻取るようにし
たことにある。The purpose is to wind the hot-rolled steel plate so that it satisfies the following formula.
−４，３（Ｓｉ＋Ａ／、）” ＋５２．１ （Ｓｉ＋Ａ
ｊ） ＋４５２．１≦ＣＴ≦ｘｘ、２（Ｓｉ＋Ａｌ−）
−１４７，３（Ｓｉ＋Ａｌ） ＋ １１３６．１
但し、ＣＴ： 巻取温度（℃）
Ｓｉ ： Ｓｉ含有量（ｗｔ％）
Ａ／＝ ： Ａｌ含有毫（ｗｔ％）以下、本発明の
詳細をその限定理由とともに説明する。−4,3(Si+A/, )” +52.1 (Si+A
j) +452.1≦CT≦xx, 2 (Si+Al-)
−147.3(Si+Al) + 1136.1 However, CT: Coiling temperature (°C) Si: Si content (wt%) A/=: Al content (wt%) Below, the details of the present invention will be described in terms of its limitations. Explain with reasons.
第１図に、熱延板の内部酸化層発生と自己焼鈍効果の有
無に対するＳｉ、Ａｌ量と巻取温度の影響を示す（自己
焼鈍効果の有無は、自己焼鈍効果の無視できる４００℃
巻取材との磁気特性の差により評価した）、同図によれ
ば、内部酸化層発生と自己焼鈍効果の有無に対する臨界
巻取温度がともにＳｉ ＋ Ａｌ量で整理でき、具体的
には、下記（ａ）式及び（ｂ）式で表わせることが判る
。Figure 1 shows the effects of Si and Al contents and coiling temperature on the generation of an internal oxidation layer and the presence or absence of the self-annealing effect in hot-rolled sheets (the presence or absence of the self-annealing effect is determined at 400°C, where the self-annealing effect can be ignored).
According to the same figure, the critical winding temperature for the generation of internal oxidation layer and the presence or absence of the self-annealing effect can both be arranged by the amount of Si + Al, and specifically, the following It can be seen that it can be expressed by equations (a) and (b).
１１．２（Ｓｉ＋Ａｊ）２−１４７．３（Ｓｉ＋Ａｌ）
−）−１１３６，１−・・・・（ａ）−４，３（Ｓｉ＋
Ａｌ）”＋５２．１ （Ｓｉ＋Ａｌ） ＋４５２．１・
・・・・・・・・（ｂ）但し、 Ｓｉ ： Ｓｉ含有量
Ａｌ：ｋｔ含有量
すなわち、巻取温度が上記（ａ）式を超えると内部酸化
層が発生して酸洗性が著しく低下し、この結果鉄損の劣
化を招く。また巻取温度が６）式を下回ると、４０ｔ）
℃巻取材との磁気特性の差がＷｚｓ／ｓｏで０． Ｉ
Ｗ／Ｋｇ以下、 ＢＳｏで０．０２Ｔ以下と、自己焼鈍
効果がほとんど期待できなくなる。これに対し、巻取温
度ＣＴ（℃）が（ｂ１式≦ＣＴ≦（ａ１式 の範囲では
、内部酸化層の生成は＃よとんどなく、シかも４００℃
巻取材に較べ。11.2(Si+Aj)2-147.3(Si+Al)
-)-1136,1-...(a)-4,3(Si+
Al)”+52.1 (Si+Al) +452.1・
・・・・・・・・・(b) However, if Si: Si content Al: kt content, that is, the coiling temperature exceeds the above formula (a), an internal oxidation layer will be generated and the pickling property will be significantly reduced. However, this results in deterioration of iron loss. Also, if the winding temperature is lower than formula 6), 40t)
The difference in magnetic properties with the rolled material at Wzs/so is 0. I
Below W/Kg and below 0.02T in BSo, the self-annealing effect can hardly be expected. On the other hand, if the winding temperature CT (°C) is within the range of (b1 formula ≦CT≦(a1 formula), the formation of internal oxidation layer is almost impossible, and it may be as high as 400°C.
Compared to rolling material.
Ｗ１ｓ／ｌｌｏが０．３ｗ／Ｋｆ以上低く、１３ｉｏが
０．０４Ｔ以上高く、十分な自己焼鈍効果が得られてい
る。W1s/llo is lower by 0.3w/Kf or more, 13io is higher by 0.04T or more, and a sufficient self-annealing effect is obtained.
このようなことから１本発明では熱間圧延後の巻取温度
ＣＴ（”Ｃ）を下式を満足するよう規定した。For this reason, in the present invention, the coiling temperature CT ("C) after hot rolling is specified so as to satisfy the following formula.
−４，３（Ｓｉ ＋Ａｌ）” ＋ ５２．１ （Ｓｉ＋
Ａｌ） ＋４５２．１≦ＣＴ≦１１．２ （Ｓｉ ＋Ａ
ｌ）２−１４７．３（ｓｔ＋Ａｌ） ＋ １１３６．１
以下１本発明の他の条件について説明すると、上記熱間
圧延の対象とするスラブは、Ｃ： ０．０３ ｗｔチ以
下、ｓｔ：ｉ、ｏ〜４． ０ｗｔチ、Ａｌ：０．０１〜
２．０ｗｔ％を含むものである。−4,3(Si+Al)”+52.1(Si+
Al) +452.1≦CT≦11.2 (Si +A
l) 2-147.3 (st+Al) + 1136.1 Below 1 To explain other conditions of the present invention, the slab to be subjected to the above hot rolling has C: 0.03 wt or less, st: i, o~4. 0wt Chi, Al: 0.01~
It contains 2.0 wt%.
Ｃは最終Ｃ量が０．００５ ｗｔチ を超えると磁気特
性が劣化するとともに磁気時効上も問題を生じ、このた
め、スラブ段階で０．００５ｗｔ％を超えるＣを含む場
合には、後に脱炭焼鈍する必要かめる。そして、スラブ
中のＣが０．０３ｗｔ ％超では、その脱炭に長時間を
要し、生産性が悪くなる。If the final C content exceeds 0.005 wt%, the magnetic properties will deteriorate and problems will arise in terms of magnetic aging. Need to be annealed. If the C content in the slab exceeds 0.03 wt %, it takes a long time to decarburize the slab, resulting in poor productivity.
Ｓｉは、１．０ｗｔ４未満では固有抵抗の低下によね十
分な低鉄損値が得られない。一方、４．０ｗｔ％を超え
ると冷間加工性が著しく悪くなる。If Si is less than 1.0wt4, a sufficiently low iron loss value cannot be obtained due to a decrease in specific resistance. On the other hand, if it exceeds 4.0 wt%, cold workability will deteriorate significantly.
Ａｌは、０．０１ｗｔ％未満ではＡｌＮが微細に析出し
てしまい、仕上暁鈍時に良好な粒成長性が得られず、磁
気特性が劣化してしまう。−方％ ２．０ｗｔ％を超え
ると、冷間加工性が劣化する。If Al is less than 0.01 wt%, AlN will precipitate finely, making it impossible to obtain good grain growth during finishing dulling, resulting in deterioration of magnetic properties. -% If it exceeds 2.0 wt%, cold workability deteriorates.
熱間圧延後の工程は特別なものではなく、圧延後、酸洗
を行い、次いで１回の冷間圧延または中間焼鈍をはさむ
２回以上の冷間圧延を実施した後、仕上焼鈍を行う。こ
の仕上焼鈍は、スラブ段階でのＣ量が０．００５ｗｔ％
超の場合には脱炭焼鈍を兼ねて行われる。The process after hot rolling is not special, and after rolling, pickling is performed, then one cold rolling or two or more cold rollings with intermediate annealing are performed, and then final annealing is performed. In this final annealing, the amount of C at the slab stage is 0.005wt%.
In the case of super steel, decarburization annealing is also performed.
ｔｓ１表に示す鋼Ａ−Ｄ′５ｒ１２００℃に加熱後、仕
上温に９３０℃で板厚２．０■に熱延し、第２表に示す
温度で巻取った。この熱延板を、７チＨＣ２，８５℃で
６０ Ｓｅａ酸洗後、０．５ｍまで冷間圧延し、次いで
９５０℃Ｘ２ｍ１ｎの焼鈍を行った。After heating the steel A-D'5r shown in Table ts1 to 1200°C, it was hot rolled to a thickness of 2.0 cm at a finishing temperature of 930°C, and coiled at the temperature shown in Table 2. This hot-rolled sheet was pickled with 7 inches of HC2 at 85°C for 60 Sea, cold rolled to 0.5m, and then annealed at 950°C x 2ml.
この時の熱延板酸洗後の内部酸化層厚と製品の磁気特性
を第２表に示す。Table 2 shows the internal oxidation layer thickness and magnetic properties of the product after pickling the hot rolled sheet.
同表から判るように、本発明の規定する上限を超える巻
取温度（条件ｍｚ）では、熱間圧延時に内部酸化層が生
成し、この内部酸化層は極めて酸洗性に劣るため、酸洗
後も４〜７μｒｎ程度残存し、そのため磁気特性、特に
。As can be seen from the table, at a coiling temperature (condition mz) exceeding the upper limit specified by the present invention, an internal oxidation layer is generated during hot rolling, and this internal oxidation layer has extremely poor pickling properties, so pickling is not possible. Approximately 4 to 7 µrn remains after that, so the magnetic properties, especially.
Ｗｌｓ／ｓｏが本発明材に較べ０．６ Ｗ／Ｋｇ程度高
くなっている。また本発明の下限を下回る巻取温度（条
件隘３）では、自己焼鈍効果が不十分で。Wls/so is higher by about 0.6 W/Kg than the material of the present invention. Further, at a winding temperature below the lower limit of the present invention (condition 3), the self-annealing effect is insufficient.
Ｗｔｓ／ｓｏ ＋ ＢＳｏともに本発明材より劣ってい
る。Both Wts/so + BSo are inferior to the present invention material.
／
／″
／
〔発明の効果〕
以上述べた本発明によれば、保熱カバーとイナートガス
というような特別な手段を用いることなく内部酸化層の
生成が適切に抑えられ、しかも十分な自己焼鈍効果を得
ることができ、このため、酸洗性と磁気特性に優れた無
方向性電磁鋼板を経済的に製造することができる。/ /'' / [Effects of the Invention] According to the present invention described above, the formation of an internal oxidation layer can be appropriately suppressed without using special means such as a heat retaining cover and inert gas, and a sufficient self-annealing effect can be achieved. Therefore, it is possible to economically produce a non-oriented electrical steel sheet with excellent pickling properties and magnetic properties.
第１図は熱延板の内部酸化層発生と自己焼鈍効果の有無
に対するＳｉｓ ｈｔ量と巻取温度の影響を示すもので
ある。
特許出願人 日本鋼管株式会社
発明者 西 本 昭 彦
同 細 谷 佳 弘同
冨 １） 邦 相同
占 部 俊 層重 １
ｚFIG. 1 shows the influence of the amount of sash and the winding temperature on the occurrence of internal oxidation layer and the presence or absence of self-annealing effect in hot rolled sheets. Patent applicant Nippon Kokan Co., Ltd. Inventor Akihiko Nishimoto Yoshihiro Hosoya
Tomi 1) Japanese homology
Shun Urabe 1
z
Claims (1)
、Ａｌ：０．０１〜２．０ｗｔ％を含むスラブを熱間圧
延した後、酸洗し、次いで１回の冷間圧延 または中間焼鈍をはさむ２回以上の冷間圧延を実施した
後、仕上焼鈍を行う無方向性電磁鋼板の製造方法におい
て、熱間圧延後の鋼板を下式を満足するよう巻取ること
を特徴とする酸洗性に優れた無方向性電磁鋼板の製造方
法。 −４．３（Ｓｉ＋Ａｌ）＾２＋５２．１（Ｓｉ＋Ａｌ）
＋４５２．１≦ＣＴ≦１１．２（Ｓｉ＋Ａｌ）＾２−１
４７．３（Ｓｉ＋Ａｌ）＋１１３６．１ 但し、ＣＴ：巻取温度（℃） Ｓｉ：Ｓｉ含有量（ｗｔ％） Ａｌ：Ａｌ含有量（ｗｔ％）[Claims] C: 0.03 wt% or less, Si: 1.0 to 4.0 wt%
, After hot rolling a slab containing Al: 0.01 to 2.0 wt%, pickling, followed by one cold rolling or two or more cold rollings with intermediate annealing, and then finishing. A method for manufacturing a non-oriented electrical steel sheet that is annealed and has excellent pickling properties, the method comprising winding a hot-rolled steel sheet so as to satisfy the following formula. -4.3(Si+Al)^2+52.1(Si+Al)
+452.1≦CT≦11.2 (Si+Al)^2-1
47.3(Si+Al)+1136.1 However, CT: Coiling temperature (°C) Si: Si content (wt%) Al: Al content (wt%)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4183688A JPH01219124A (en) | 1988-02-26 | 1988-02-26 | Production of non-oriented electrical steel sheet having excellent pickling property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4183688A JPH01219124A (en) | 1988-02-26 | 1988-02-26 | Production of non-oriented electrical steel sheet having excellent pickling property |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01219124A true JPH01219124A (en) | 1989-09-01 |
| JPH0433850B2 JPH0433850B2 (en) | 1992-06-04 |
Family
ID=12619347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4183688A Granted JPH01219124A (en) | 1988-02-26 | 1988-02-26 | Production of non-oriented electrical steel sheet having excellent pickling property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01219124A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737129A (en) * | 2022-03-02 | 2022-07-12 | 新余钢铁股份有限公司 | High-performance non-oriented silicon steel for wound motor iron core and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62180014A (en) * | 1986-02-04 | 1987-08-07 | Nippon Steel Corp | Non-oriented electrical sheet having low iron loss and superior magnetic flux density and its manufacture |
| JPS6333518A (en) * | 1987-06-27 | 1988-02-13 | Nippon Steel Corp | Non-oriented electrical steel sheet having low iron loss and excellent magnetic flux density and its production |
| JPS6341838A (en) * | 1986-08-06 | 1988-02-23 | Mitsubishi Electric Corp | Camera |
| JPS6439348A (en) * | 1987-08-04 | 1989-02-09 | Nippon Steel Corp | Non-oriented magnetic steel sheet having low iron loss and excellent magnetic flux density and its production |
-
1988
- 1988-02-26 JP JP4183688A patent/JPH01219124A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62180014A (en) * | 1986-02-04 | 1987-08-07 | Nippon Steel Corp | Non-oriented electrical sheet having low iron loss and superior magnetic flux density and its manufacture |
| JPS6341838A (en) * | 1986-08-06 | 1988-02-23 | Mitsubishi Electric Corp | Camera |
| JPS6333518A (en) * | 1987-06-27 | 1988-02-13 | Nippon Steel Corp | Non-oriented electrical steel sheet having low iron loss and excellent magnetic flux density and its production |
| JPS6439348A (en) * | 1987-08-04 | 1989-02-09 | Nippon Steel Corp | Non-oriented magnetic steel sheet having low iron loss and excellent magnetic flux density and its production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737129A (en) * | 2022-03-02 | 2022-07-12 | 新余钢铁股份有限公司 | High-performance non-oriented silicon steel for wound motor iron core and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0433850B2 (en) | 1992-06-04 |
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