JPS61174329A - Method for stress relief annealing of grain oriented magnetic sheet - Google Patents
Method for stress relief annealing of grain oriented magnetic sheetInfo
- Publication number
- JPS61174329A JPS61174329A JP60011772A JP1177285A JPS61174329A JP S61174329 A JPS61174329 A JP S61174329A JP 60011772 A JP60011772 A JP 60011772A JP 1177285 A JP1177285 A JP 1177285A JP S61174329 A JPS61174329 A JP S61174329A
- Authority
- JP
- Japan
- Prior art keywords
- strain
- annealing
- stress relief
- relief annealing
- sheet
- 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
Classifications
-
- 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
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は方向性電磁鋼板の歪取り焼鈍方法にかかわり、
歪解放を促進し鉄損の低下を図るものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a strain relief annealing method for grain-oriented electrical steel sheets,
This is to promote strain release and reduce iron loss.
(従来の技術)
方向性電磁鋼板は、Stを2〜4%含むスラブを熱間圧
延、冷間圧延、中間焼鈍、脱炭焼鈍、仕上焼鈍等のプロ
セスで処理することによυ製造される。(Prior art) Grain-oriented electrical steel sheets are produced by processing slabs containing 2 to 4% St through processes such as hot rolling, cold rolling, intermediate annealing, decarburization annealing, and final annealing. .
コイル状で仕上焼鈍されたコイルはコイルセットを除去
するために熱間で矯正され平坦化される。The finished annealed coil is hot straightened and flattened to remove the coil set.
この時入った歪による磁気特性の劣化を回復させるため
に歪取力焼鈍を行い、さらに絶縁被膜液を塗付、焼付け
て製品とする。もう一つの場合は仕上焼鈍後、表面に耐
着したマグネシャ等を水洗し仕上焼鈍時に生成したグラ
ス被膜をもった、コイルセットのある製品として需要家
へ出荷される。In order to recover the deterioration of magnetic properties caused by the strain introduced at this time, strain relief annealing is performed, and an insulating coating liquid is applied and baked to produce a product. In the other case, after final annealing, the magnesia, etc. that have adhered to the surface are washed with water, and the product is shipped to customers as a coil set product with a glass film formed during final annealing.
この場合は一般に需要家で巻鉄心に加工され、この加工
されたものを約800℃の温度で焼鈍し、加工歪による
磁気特性劣化を回復し、鉄心製品とする。どちらの場合
も歪による磁気特性の劣化を回復することは製品の磁気
特性をよいレベルに保つため重要なことである。In this case, it is generally processed into a wound core by the customer, and this processed product is annealed at a temperature of approximately 800°C to recover from deterioration in magnetic properties due to processing strain, and is used as an iron core product. In either case, it is important to recover the deterioration of magnetic properties due to strain in order to maintain the magnetic properties of the product at a good level.
コイル状で仕上焼鈍された方向性電磁鋼板は地鉄表面に
密着結合したグラス被膜と称される酸化物の層を有して
いる。一方、加工された後の歪取υ焼鈍は加工歪として
入った転位(dislocation )等の欠陥を解
放あるいは再配列し回復(recover)することに
よシ磁気特性を改善する。この焼鈍は連続焼鈍で750
〜900℃30秒〜数分間、或は箱焼鈍で750〜90
0℃にて1〜数時間行われる。A grain-oriented electrical steel sheet that is finished annealed in a coiled shape has an oxide layer called a glass coating tightly bonded to the surface of the base steel. On the other hand, strain relief annealing after processing improves magnetic properties by releasing or rearranging and recovering defects such as dislocations introduced as processing strains. This annealing is continuous annealing and is 750
~900℃ for 30 seconds to several minutes or box annealing to 750~90
It is carried out at 0°C for 1 to several hours.
この焼鈍で充分に歪による磁気特性劣化を回復すること
が重要である。このために例えば特開昭59−9622
7号公報記載の方法では焼鈍時の張力を0.3〜0.7
kl/ws2に低めて鉄損の低下を図っている。It is important that this annealing sufficiently recovers from the deterioration in magnetic properties caused by strain. For this purpose, for example, JP-A-59-9622
In the method described in Publication No. 7, the tension during annealing is set to 0.3 to 0.7.
The iron loss is reduced by lowering it to kl/ws2.
(発明が解決しようとする問題点)
しかし、しばしばこの焼鈍では磁気特性の回復が十分で
ないことがあシ、本来の鋼板がもつ磁気特性が生かされ
ない場合がおる。本発明者らはこのような歪による磁気
特性劣化の回復を促進する方法について検討し、歪取り
焼鈍前に軽度の歪を付与せしめる予備処理をすると回復
が速く、充分に行われ鉄損の低下が安定することを見出
した。(Problems to be Solved by the Invention) However, this annealing often does not sufficiently recover the magnetic properties, and the original magnetic properties of the steel sheet may not be utilized. The present inventors investigated a method for promoting recovery from such deterioration of magnetic properties due to strain, and found that by performing preliminary treatment to impart slight strain before strain relief annealing, recovery is quick and sufficient, resulting in a reduction in iron loss. was found to be stable.
(問題点を解決するだめの手段)
本発明はこの知見に基づいてなされたものでありその要
旨は仕上焼鈍された方向性電磁鋼板を歪取り焼鈍するに
あたり、該鋼板にブラシ、ショツトブラスト、歯車状ロ
ール、ダルロール、ゾールイン等により0.05〜5.
0 #/wの残留応力を生じる歪を付与し、次いで歪取
力焼鈍を行うことを特徴とする方向性電磁鋼板の歪取力
焼鈍方法にある。(Means for Solving the Problems) The present invention has been made based on this knowledge, and its gist is that when finish annealing grain-oriented electrical steel sheets are annealed to remove strain, brushes, shot blasts, gears, etc. are applied to the steel sheets. 0.05-5.
The present invention provides a strain relief annealing method for a grain-oriented electrical steel sheet, characterized in that a strain that produces a residual stress of 0 #/w is applied, and then strain relief annealing is performed.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
まず実験データを参照して述べる。本発明者達は方向性
電磁鋼板の歪取り焼鈍において歪の解放を促進し、鉄損
を安定して低下させるべく実験を行りた。First, the explanation will be given with reference to experimental data. The present inventors conducted an experiment in order to promote the release of strain during strain relief annealing of a grain-oriented electrical steel sheet and stably reduce iron loss.
供試材として、フィル状で仕上焼鈍された3、20%S
1、板厚0.225mの2回冷延法による方向性電磁鋼
板を用いた。該鋼板に0.2〜3.5′に9/mの残留
応力を生じる歪を、鋼線ブラシにて全面に、が−ルペン
によシ10■間隔に付与した。このように処理した鋼板
と、比較のために仕上焼鈍されたままの鋼板について8
00℃×120秒間の歪取力焼鈍を連続焼鈍にて行い、
次いで鉄損値W17150を測定した。その結果を第1
図に示すが、鋼線ブラシおよびゾールインにて歪を付与
した鋼板(1);(2は歪付与なし鋼板(3)とくらべ
て鉄損値w、7Aoが低いのが知見された。即ち、歪付
与なし鋼板(3)は鉄損値W17150が平均値で1.
105WAであるのに対シテ、歪付与o鋼板(i) 、
@)U 1.060 トx、o7oW/kfであシ、
歪を付与し次いで歪取り焼鈍すると歪の解放が促進され
鉄損を低下せしめる作用が奏される。なおこの歪の付与
では仕上焼鈍で形成されたグラス被膜は破損されていな
かった。As a test material, 3.20% S was finish annealed in the form of a film.
1. A grain-oriented electrical steel sheet having a thickness of 0.225 m and subjected to two-time cold rolling was used. A strain producing a residual stress of 9/m in the range of 0.2 to 3.5' was applied to the entire surface of the steel plate using a steel wire brush at intervals of 10 cm using a galvanic brush. 8 for the steel plate treated in this way and the steel plate as finished annealed for comparison.
Strain relief annealing was performed at 00°C for 120 seconds using continuous annealing.
Next, the iron loss value W17150 was measured. The result is the first
As shown in the figure, it was found that the iron loss value w and 7Ao of the steel plate (1) and (2) strained with a steel wire brush and sol-in were lower than that of the steel plate (3) without strain. That is, The steel plate without strain (3) has an average iron loss value W17150 of 1.
Even though it is 105WA, it is steel plate (i) with strain imparted,
@) U 1.060 x, o7oW/kf,
When strain is applied and then strain relief annealing is performed, the release of strain is promoted and the effect of reducing iron loss is achieved. Note that the glass coating formed by final annealing was not damaged by applying this strain.
このように歪を付与し次いで歪取力焼鈍すると鉄損が低
下する理由は、歪付与で導入された転位が歪取り焼鈍で
加熱されたさい結晶粒界、鋼板表面等に消滅するとき、
歪の解放を誘発し促進するためと考えられる。The reason why iron loss decreases when strain is applied and then strain relief annealing is applied is that when the dislocations introduced by strain application disappear at grain boundaries, the steel plate surface, etc. when heated in strain relief annealing,
This is thought to be to induce and promote the release of strain.
鉄損の低下が図られる歪の付与程度は残留応力で0.0
5 kg7m2以上必要である。一方、歪の程度が余シ
大きくなると付与された歪めため鉄損が低下しないので
、残留応力の上限は5.0iである。The degree of strain applied to reduce iron loss is 0.0 in terms of residual stress.
Requires at least 5 kg and 7 m2. On the other hand, as the degree of strain increases, the iron loss does not decrease due to the applied strain, so the upper limit of the residual stress is 5.0i.
歪付与の方法は前記ブラシ、ゾールインの他にショツト
ブラストの投射、歯車状ロールやダルロールによる軽圧
下等が採用される。また付与する歪はグラス被膜を破壊
しないかあるいは破壊しても軽度で外観上は殆んど被膜
に損傷を与え々いようにするのが好ましい。In addition to the above-mentioned brush and sol-in methods, methods for applying strain include shot blasting, light rolling with gear rolls and dull rolls, and the like. Further, it is preferable that the applied strain is such that it does not destroy the glass coating, or even if it does, it is so slight that it hardly causes any damage to the coating in terms of appearance.
本発明において歪取り焼鈍される方向性電磁鋼板につい
ては、その鋼成分、歪取力焼鈍されるまでの製造方法と
も限定する必要はカい〇また歪取力焼鈍は連続焼鈍ある
いは箱焼鈍のいずれであってもよく、焼鈍方法は如何な
る方法でも適用される。Regarding the grain-oriented electrical steel sheet subjected to strain relief annealing in the present invention, there is no need to limit its steel composition or manufacturing method up to strain relief annealing. Also, strain relief annealing may be continuous annealing or box annealing. Any annealing method may be used.
(実施例) 次に実施例を述べる。(Example) Next, an example will be described.
実施例1
重量%でC:0.078%、Sl:3.28%、Mn:
Q、075%、At:0.028%、S:0.025チ
、N:0.0080チ、残部鉄からなる珪素鋼スラブを
常法で熱間圧延−焼鈍−冷間圧延を行って0.225m
m厚の鋼板とした。次いで脱炭焼鈍し、MgOを主成分
とする焼鈍分離剤を塗布し、コイル状で仕上焼鈍した。Example 1 C: 0.078%, Sl: 3.28%, Mn:
A silicon steel slab consisting of Q, 075%, At: 0.028%, S: 0.025cm, N: 0.0080cm, balance iron was hot-rolled, annealed and cold-rolled in the usual manner. .225m
A steel plate of m thickness was used. Then, it was decarburized and annealed, coated with an annealing separator containing MgO as a main component, and finished annealed in a coiled form.
仕上焼鈍後の鋼板に、鋼線ブラシによるブラッシング、
ショツトブラストの投射、歯車状のロールによる1%の
圧下によって歪を付与した。次いで、これらの鋼板と、
比較のために歪を付与せず仕上焼鈍された11の鋼板に
ついて歪取力焼鈍を800℃×2時間の条件で゛行って
、磁気特性を測定した。その結果を第1表に示す。Brushing with a steel wire brush on the steel plate after finish annealing,
Strain was applied by shot blasting and 1% reduction by gear-shaped rolls. Next, these steel plates and
For comparison, 11 steel plates that were finish annealed without being strained were subjected to strain relief annealing at 800° C. for 2 hours, and their magnetic properties were measured. The results are shown in Table 1.
第1表
実施例2
b■でC: 0.055%、Sl:3.23%、Mn:
0.065%、S:0.025%、残部鉄からなる珪素
鋼スラブを常法で熱間圧延−焼鈍一冷間圧延一焼鈍一冷
聞圧延を行って0.225%厚の鋼板とした。次いで脱
炭焼鈍し、MgOを主成分とする焼鈍分離剤を塗布し、
コイル状で仕上焼鈍した。Table 1 Example 2 b■C: 0.055%, Sl: 3.23%, Mn:
A silicon steel slab consisting of 0.065%, S: 0.025%, and the balance iron was hot rolled, annealed, cold rolled, annealed, and cold rolled in a conventional manner to obtain a 0.225% thick steel plate. . Next, decarburization annealing is performed, and an annealing separation agent containing MgO as the main component is applied.
Finish annealed in coil form.
この仕上焼鈍後のコイルセクト付の鋼板の実施例1と同
様な歪付与処理し、800℃×2時間の箱焼鈍後、磁気
特性を測定した。その結果を第2表に示す。After final annealing, the steel plate with coil sections was subjected to the same strain imparting treatment as in Example 1, and after box annealing at 800° C. for 2 hours, the magnetic properties were measured. The results are shown in Table 2.
第2表
以上のように1本発明に従い、方向性電磁鋼板に歪を付
与し、次いで歪取り焼鈍することによって、鉄損を低下
させることができる効果が奏される。As shown in Table 2 and above, according to the present invention, by imparting strain to a grain-oriented electrical steel sheet and then subjecting it to strain relief annealing, the effect of reducing iron loss is achieved.
第1図は、方向性電磁鋼板の歪取9焼鈍に際しての、歪
付与処理と鉄損との関係を示す図である。FIG. 1 is a diagram showing the relationship between strain imparting treatment and iron loss during strain relief 9 annealing of a grain-oriented electrical steel sheet.
Claims (1)
あたり、該鋼板に0.05〜5.0kg/mm^2の残
留応力を生じる歪を付与し、次いで歪取力焼鈍を行うこ
とを特徴とする方向性電磁鋼板の歪取り焼鈍方法。When performing strain relief annealing on a grain-oriented electrical steel sheet that has been finish annealed, it is recommended to apply strain that produces a residual stress of 0.05 to 5.0 kg/mm^2 to the steel sheet, and then perform strain relief annealing. Distortion relief annealing method for grain-oriented electrical steel sheets.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1177285A JPH0711035B2 (en) | 1985-01-26 | 1985-01-26 | Strain relief annealing method for grain-oriented electrical steel sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1177285A JPH0711035B2 (en) | 1985-01-26 | 1985-01-26 | Strain relief annealing method for grain-oriented electrical steel sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61174329A true JPS61174329A (en) | 1986-08-06 |
JPH0711035B2 JPH0711035B2 (en) | 1995-02-08 |
Family
ID=11787257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1177285A Expired - Lifetime JPH0711035B2 (en) | 1985-01-26 | 1985-01-26 | Strain relief annealing method for grain-oriented electrical steel sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0711035B2 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56227A (en) * | 1979-06-13 | 1981-01-06 | Kawasaki Steel Corp | Manufacture of grain-oriented electromagnetic steel plate of high flatness |
JPS56130454A (en) * | 1980-03-14 | 1981-10-13 | Nippon Steel Corp | Anisotropic electrical steel sheet with low iron loss and its manufacture |
JPS5923822A (en) * | 1982-07-28 | 1984-02-07 | Nippon Steel Corp | Directional electrical steel sheet with superior magnetic characteristic and its manufacture |
JPS5928525A (en) * | 1982-07-19 | 1984-02-15 | アレゲニ−・ラドラム・スチ−ル・コ−ポレ−シヨン | Manufacture of cube-on-edge silicon steel |
-
1985
- 1985-01-26 JP JP1177285A patent/JPH0711035B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56227A (en) * | 1979-06-13 | 1981-01-06 | Kawasaki Steel Corp | Manufacture of grain-oriented electromagnetic steel plate of high flatness |
JPS56130454A (en) * | 1980-03-14 | 1981-10-13 | Nippon Steel Corp | Anisotropic electrical steel sheet with low iron loss and its manufacture |
JPS5928525A (en) * | 1982-07-19 | 1984-02-15 | アレゲニ−・ラドラム・スチ−ル・コ−ポレ−シヨン | Manufacture of cube-on-edge silicon steel |
JPS5923822A (en) * | 1982-07-28 | 1984-02-07 | Nippon Steel Corp | Directional electrical steel sheet with superior magnetic characteristic and its manufacture |
Also Published As
Publication number | Publication date |
---|---|
JPH0711035B2 (en) | 1995-02-08 |
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