JPH07318535A - Method and apparatus for measuring r value for rolled steel plate - Google Patents
Method and apparatus for measuring r value for rolled steel plateInfo
- Publication number
- JPH07318535A JPH07318535A JP11643894A JP11643894A JPH07318535A JP H07318535 A JPH07318535 A JP H07318535A JP 11643894 A JP11643894 A JP 11643894A JP 11643894 A JP11643894 A JP 11643894A JP H07318535 A JPH07318535 A JP H07318535A
- Authority
- JP
- Japan
- Prior art keywords
- value
- magnetic anisotropy
- steel sheet
- steel plate
- rolled steel
- 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.)
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，圧延鋼板をプレス加工
する上での深絞り性の指標であるｒ値を非破壊，非接触
で求めることができる圧延鋼板のｒ値測定方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring an r value of a rolled steel sheet, which is capable of non-destructively and non-contacting determination of an r value, which is an index of deep drawability in pressing a rolled steel sheet.
【０００２】[0002]
【従来の技術】上記圧延鋼板のｒ値は，切り出した試験
片の長さ方向に１５〜２０％の塑性歪みを与えたときの
幅方向と厚さ方向との塑性歪比（塑性異方性）として定
義されている。しかし，このようなｒ値の測定方法は破
壊試験であり，又，圧延鋼板の部分的な評価であるた
め，圧延工程でのオンライン検査に採用することはでき
ない。そこで，上記ｒ値を非破壊，非接触で求め，オン
ライン検査に利用すべく電磁超音波によるｒ値測定方法
が提案されている。（鉄と鋼，Ｖｏｌ．７９−１９９
３） 上記電磁超音波によるｒ値測定方法は，鋼板の塑性異方
性（ｒ値）が鋼板の集合組織に強く依存することを利用
している。集合組織を定量的に表す結晶方位分布関数の
４次の方位分布係数Ｗ400 とｒ値との対応が良いことが
知られており，Ｗ400 を算出することによって鋼板のｒ
値を求めることができる。このＷ400 を鋼板の圧延方向
に対して０°，４５°，９０°の方向に伝播する超音波
の伝播時間（音速）から算出することによって，鋼板の
ｒ値を非破壊，非接触で求めることができる。2. Description of the Related Art The r-value of a rolled steel sheet is the plastic strain ratio (plastic anisotropy) in the width direction and the thickness direction when a plastic strain of 15 to 20% is applied to the cut test piece in the length direction. ) Is defined as. However, such a method of measuring the r-value is a destructive test and is a partial evaluation of the rolled steel sheet, and therefore cannot be used for online inspection in the rolling process. Therefore, a method for measuring the r-value by electromagnetic ultrasonic waves has been proposed in order to obtain the r-value in a non-destructive and non-contact manner and use it for online inspection. (Iron and Steel, Vol. 79-199
3) The r-value measuring method using electromagnetic ultrasonic waves utilizes that the plastic anisotropy (r-value) of the steel sheet strongly depends on the texture of the steel sheet. Texture correspondence is known that good and order orientation distribution coefficient W 400 and r value 4 of the crystal orientation distribution function quantitatively representing a, r of the steel sheet by calculating the W 400
The value can be calculated. By calculating this W 400 from the propagation time (sonic velocity) of the ultrasonic waves propagating in the directions of 0 °, 45 °, and 90 ° with respect to the rolling direction of the steel sheet, the r value of the steel sheet is obtained in a non-destructive and non-contact manner. be able to.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら，上記電
磁超音波法では鋼板に強磁場が印加されるので，鋼板が
着磁してしまうため，これを消磁する工程が必要となる
問題点があった。そこで，本発明の目的とするところ
は，鋼板を着磁させることなく鋼板のｒ値を非破壊，非
接触で測定することができる圧延鋼板のｒ値測定方法及
びその装置を提供することにある。However, in the above-mentioned electromagnetic ultrasonic method, since a strong magnetic field is applied to the steel sheet, the steel sheet is magnetized, so that there is a problem that a step of demagnetizing the steel sheet is required. . Therefore, an object of the present invention is to provide a method and an apparatus for measuring an r-value of a rolled steel sheet that can measure the r-value of the steel sheet in a non-destructive and non-contact manner without magnetizing the steel sheet. .
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に本発明が採用する方法は，圧延工程中の鋼板のｒ値を
測定する方法において，上記圧延鋼板の磁気異方性を検
出することにより，走行中の圧延鋼板のｒ値を求めるこ
とを特徴とする圧延鋼板のｒ値測定方法である。又，上
記目的を達成するために本発明が採用する手段は，圧延
工程中の鋼板のｒ値を測定する装置において，コの字状
に形成された励磁ヨークと検出ヨークとを直交配置する
と共に，上記励磁ヨークに励磁コイル，検出ヨークに検
出コイルを設けて，各ヨークの端部を磁極とする磁気異
方性センサを構成し，上記各磁極を上記圧延鋼板の表面
に平行に配設して，上記励磁コイルに所定周波数，所定
電流を印加して上記励磁ヨークを励磁したときに，上記
検出コイルに誘起される電圧を検出することにより，上
記圧延鋼板の磁気異方性の大きさを求め，該磁気異方性
とｒ値との関係から上記ｒ値を算出することを特徴とす
る圧延鋼板のｒ値測定装置として構成されている。上記
構成は，上記磁気異方性センサの上記磁極を鋼板の圧延
方向に対して所定角度傾けて配置したときの電圧を測定
する圧延鋼板のｒ値測定装置として構成することができ
る。The method adopted by the present invention to achieve the above object is to detect the magnetic anisotropy of the rolled steel sheet in the method of measuring the r value of the steel sheet during the rolling process. Is a method for measuring the r-value of a rolled steel sheet during running. Further, in order to achieve the above object, the means adopted by the present invention is an apparatus for measuring the r value of a steel sheet during a rolling process, in which an exciting yoke and a detecting yoke formed in a U-shape are arranged orthogonally. An exciting magnetic coil is provided on the exciting yoke and a detecting coil is provided on the detecting yoke to form a magnetic anisotropy sensor having magnetic poles at the ends of the yokes. The magnetic poles are arranged parallel to the surface of the rolled steel plate. Then, when a predetermined frequency and a predetermined current are applied to the exciting coil to excite the exciting yoke, the voltage induced in the detecting coil is detected to determine the magnitude of the magnetic anisotropy of the rolled steel sheet. It is configured as an r-value measuring device for a rolled steel sheet, which is characterized by calculating and calculating the r-value from the relationship between the magnetic anisotropy and the r-value. The above configuration can be configured as an r-value measuring device for a rolled steel sheet that measures the voltage when the magnetic poles of the magnetic anisotropy sensor are arranged at a predetermined angle with respect to the rolling direction of the steel sheet.
【０００５】[0005]
【作用】本願発明者によって鋼板のｒ値と磁気異方性の
大きさとが一次の関係にあることが明らかにされた。従
って，圧延工程中の鋼板の磁気異方性を測定することに
より、圧延鋼板のｒ値を求めることができる。上記磁気
異方性からｒ値を求めるための構成は，磁気異方性セン
サを圧延鋼板の表面に配置して，上記磁気異方性センサ
の励磁ヨークを励磁したときに発生する磁束が鋼板を通
過する透磁率の方向差，即ち磁気異方性の大きさを検出
コイルに誘起される電圧から検出する。この検出出力を
演算処理装置に入力して，予め設定された磁気異方性と
ｒ値との関係からｒ値を求めることができる。The present inventor has revealed that the r value of the steel sheet and the magnitude of magnetic anisotropy have a linear relationship. Therefore, the r value of the rolled steel sheet can be obtained by measuring the magnetic anisotropy of the steel sheet during the rolling process. The configuration for obtaining the r value from the magnetic anisotropy is such that the magnetic anisotropy sensor is arranged on the surface of the rolled steel plate and the magnetic flux generated when the exciting yoke of the magnetic anisotropy sensor is excited The direction difference of the magnetic permeability passing through, that is, the magnitude of magnetic anisotropy is detected from the voltage induced in the detection coil. By inputting this detection output to the arithmetic processing unit, the r value can be obtained from the preset relationship between the magnetic anisotropy and the r value.
【０００６】[0006]
【実施例】以下，添付図面を参照して本発明を具体化し
た実施例につき説明し，本発明の理解に供する。尚，以
下の実施例は本発明を具体化した一例であって，本発明
の技術的範囲を限定するものではない。ここに，図１は
本発明の測定方法を適用したｒ値測定装置の構成を示す
模式図，図２は実施例に係るセンサ部の構成を示す斜視
図，図３はセンサ部と鋼板とによって形成される磁気回
路図，図４は磁気異方性とｒ値との関係を示すグラフ，
図５はセンサ部を回転させたときの鋼板の磁気異方性を
示すグラフである。図１において，ｒ値測定装置１は，
センサ部２と，該センサ部２の励磁用電源３と，センサ
部２の出力から信号電圧を取り出すロックインアンプ４
と，該ロックインアンプ４の出力からｒ値を算出するコ
ンピュータ５とを具備して構成されている。上記センサ
部２は，周知の磁気異方性センサとして構成されてい
る。図２に示すように，コの字状に形成された励磁ヨー
ク６と，検出ヨーク７とを互いに直交させて配置し，励
磁ヨーク６の両脚部には励磁コイル８ａ，８ｂ，検出ヨ
ーク７の中央部には検出コイル９が設けられている。各
ヨーク６，７の脚端はそれぞれ磁極Ｅ1 ，Ｅ2 ，Ｄ1 ，
Ｄ2 を形成し，同一平面上に正方形になるように配置さ
れている。上記各励磁コイル８ａ，８ｂは直列接続し
て，励磁用電源３からの交流電流が印加される。各ヨー
ク６，７は上記のような状態でシリコンゴムで固定さ
れ，中心軸１０回りに回転できるようにしてセンサ部２
が構成される。上記構成により鋼板のｒ値を測定する方
法を以下に説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. The following embodiments are examples of embodying the present invention and do not limit the technical scope of the present invention. Here, FIG. 1 is a schematic diagram showing the configuration of an r-value measuring device to which the measuring method of the present invention is applied, FIG. 2 is a perspective view showing the configuration of the sensor unit according to the embodiment, and FIG. Magnetic circuit diagram formed, FIG. 4 is a graph showing the relationship between magnetic anisotropy and r value,
FIG. 5 is a graph showing the magnetic anisotropy of the steel plate when the sensor unit is rotated. In FIG. 1, the r-value measuring device 1 is
Sensor unit 2, excitation power source 3 for the sensor unit 2, and lock-in amplifier 4 for extracting a signal voltage from the output of the sensor unit 2.
And a computer 5 for calculating the r value from the output of the lock-in amplifier 4. The sensor unit 2 is configured as a known magnetic anisotropy sensor. As shown in FIG. 2, a U-shaped exciting yoke 6 and a detecting yoke 7 are disposed so as to be orthogonal to each other, and the exciting coils 8a and 8b and the detecting yoke 7 are provided on both legs of the exciting yoke 6. A detection coil 9 is provided at the center. The leg ends of the yokes 6 and 7 have magnetic poles E 1 , E 2 , D 1 and
D 2 is formed, and they are arranged so as to form a square on the same plane. The exciting coils 8a and 8b are connected in series and an alternating current from the exciting power source 3 is applied. The respective yokes 6 and 7 are fixed with the silicone rubber in the above-mentioned state so that they can rotate around the central axis 10 and the sensor unit 2
Is configured. A method of measuring the r value of the steel plate with the above configuration will be described below.
【０００７】上記センサ部２を図１に示すように，測定
する鋼板１１の表面と平行に各磁極を近接させて配置
し，励磁コイル８ａ，８ｂに励磁用電源３から交流電流
を印加したとき，検出コイル９に誘起される信号電圧を
取り出す。励磁は鋼板１１を着磁させないよう鋼板１１
の初期透磁率の範囲とする。この状態で形成される磁気
等価回路は図３に示すようになる。図３において，Ｒ
pass１は鋼板１１のＰＡＳＳ−１方向の磁気抵抗，Ｒ
pass２は鋼板１１のＰＡＳＳ−２方向の磁気抵抗，Ｒ6
は励磁ヨーク６の磁気抵抗，Ｒ 7 は検出ヨーク７の磁気
抵抗，Ｒg は磁極と鋼板１１との間の近接ギャップの磁
気抵抗，ＮＩは起磁力である。この磁気等価回路におけ
るＲ7 ，即ち，検出ヨーク７を流れる磁束を検出するこ
とにより，鋼板１１のＰＡＳＳ−１方向とＰＡＳＳ−２
方向との間の透磁率の差（磁気異方性の大きさ）を求め
ることができる。そこで，センサ部２の鋼板１１に対面
させる方向を，励磁ヨーク６の方向が鋼板１１の圧延方
向に対して４５度になるように配置すると，圧延方向と
板幅方向とがＰＡＳＳ−１，ＰＡＳＳ−２の方向とな
り，磁気異方性の大きさが最大になる状態が得られる。
上記検出ヨーク７を流れる磁束を検出するために，図１
に示すように検出コイル９に検出された信号電圧をロッ
クインアンプ４に入力する。ロックインアンプ４は微小
信号を測定するための装置で，測定信号と同期関係にあ
る参照信号により位相検波して信号レベルを測定する。
本構成では上記参照信号として励磁用電源３の交流が用
いられている。このロックインアンプ４で測定された信
号電圧はＡ／Ｄ変換された後，コンピュータ５に入力し
て絶対値が算出される。As shown in FIG. 1, the sensor section 2 is measured.
Place each magnetic pole close to the surface of the steel plate 11
Then, an alternating current is supplied from the excitation power source 3 to the excitation coils 8a and 8b.
Is applied, the signal voltage induced in the detection coil 9
Take it out. Excitation does not allow the steel sheet 11 to be magnetized.
The range of the initial magnetic permeability of. Magnetism formed in this state
The equivalent circuit is as shown in FIG. In FIG. 3, R
pass1 is the magnetic resistance of the steel sheet 11 in the PASS-1 direction, R
pass2 is the magnetic resistance of the steel sheet 11 in the PASS-2 direction, R6
Is the magnetic resistance of the exciting yoke 6, R 7Is the magnetism of the detection yoke 7.
Resistance, RgIs the magnetism of the close gap between the magnetic pole and the steel plate 11.
Air resistance and NI are magnetomotive forces. In this magnetic equivalent circuit
R7That is, the magnetic flux flowing through the detection yoke 7 can be detected.
And the PASS-1 direction of the steel plate 11 and the PASS-2
Calculate the difference in magnetic permeability (magnitude of magnetic anisotropy)
You can Then, face the steel plate 11 of the sensor unit 2
The direction in which the exciting yoke 6 is rolled is the rolling direction of the steel sheet 11.
If it is arranged at 45 degrees to the rolling direction,
The board width direction is the direction of PASS-1 and PASS-2.
Therefore, the state in which the magnitude of magnetic anisotropy is maximized is obtained.
In order to detect the magnetic flux flowing through the detection yoke 7, FIG.
The signal voltage detected by the detection coil 9 is locked as shown in
Input to the quin amp 4. Lock-in amplifier 4 is minute
A device for measuring signals, which has a synchronous relationship with the measured signal.
The phase of the signal is detected by the reference signal, and the signal level is measured.
In this configuration, the alternating current of the excitation power supply 3 is used as the reference signal.
I have been. The signal measured by this lock-in amplifier 4
The signal voltage is A / D converted and then input to the computer 5.
Absolute value is calculated.
【０００８】この測定方法により得られた磁気異方性の
大きさと，ｒ値との関係は，切り出されたサンプルの破
壊試験によって求めたｒ値と，上記磁気異方性とを対比
することで検証できる。図４は３種類の鋼板サンプルに
ついて破壊試験により求めたｒ値を検量線とし
て，各鋼板サンプルについて磁気異方性の大きさを求め
た結果をグラフに示している。同図に示されるように，
同一種類の鋼板についてはｒ値と磁気異方性の大きさと
は一次の関係にあることがわかる。従って，磁気異方性
の大きさからｒ値の相対的な変動を知ることができる。
そこで，センサ部２を圧延工程中の鋼板１１に配して磁
気異方性の大きさを連続測定すると，ｒ値の変動がオン
ラインで検出できる。プレス加工して使用される自動車
用鋼板等ではｒ値が所定の値に保たれていることが重要
であるが、これがオンラインで測定できると変動が即座
に検出され，圧延条件や熱処理条件等を調整することが
可能となる。上記磁気異方性の大きさは，センサ部２の
鋼板１１に対する角度によって変化する。図５に示すよ
うに，センサ部２を中心軸１０で回転させたとき，励磁
ヨーク６の方向が鋼板１１の圧延方向に対して約４５度
になる位置で磁気異方性の最大値が得られる。従って，
磁気異方性からｒ値を求めるには，センサ部２を回転さ
せて角度に対する最大値を求め，検出出力のＳ／Ｎ比を
改善する。The relationship between the magnitude of the magnetic anisotropy obtained by this measuring method and the r value is obtained by comparing the r value obtained by a destructive test of a cut sample with the magnetic anisotropy. Can be verified. FIG. 4 is a graph showing the results of determining the magnitude of magnetic anisotropy for each steel plate sample using the r value obtained by the destructive test for the three types of steel plate samples as a calibration curve. As shown in the figure,
It can be seen that, for steel sheets of the same type, the r value and the magnitude of magnetic anisotropy have a linear relationship. Therefore, the relative variation of the r value can be known from the magnitude of the magnetic anisotropy.
Therefore, by arranging the sensor unit 2 on the steel plate 11 during the rolling process and continuously measuring the magnitude of the magnetic anisotropy, the fluctuation of the r value can be detected online. It is important that the r-value is kept at a predetermined value in automobile steel sheets that are pressed and used, but if this can be measured online, fluctuations can be immediately detected, and rolling conditions and heat treatment conditions can be detected. It becomes possible to adjust. The magnitude of the magnetic anisotropy changes depending on the angle of the sensor unit 2 with respect to the steel plate 11. As shown in FIG. 5, when the sensor unit 2 is rotated about the central axis 10, the maximum value of the magnetic anisotropy is obtained at a position where the direction of the exciting yoke 6 is about 45 degrees with respect to the rolling direction of the steel sheet 11. To be Therefore,
To obtain the r value from the magnetic anisotropy, the sensor unit 2 is rotated to find the maximum value with respect to the angle, and the S / N ratio of the detection output is improved.
【０００９】[0009]
【発明の効果】以上の説明の通り本発明によれば，ｒ値
と磁気異方性の大きさとの関係から磁気異方性の検出に
よって圧延鋼板のｒ値を求めることができる。磁気異方
性の測定は磁気異方性センサを鋼板の表面に近接配置す
る非接触、非破壊の測定なので，圧延工程中の鋼板から
測定することができる。従って，オンライン測定が可能
であり，ｒ値の変動が即座に検出されるので圧延条件等
の調整に対応させることができ，鋼板全長にわたる品質
管理、品質保証がなされる。（請求項１） 上記磁気異方性の検出は，磁気異方性センサを圧延鋼板
の表面に近接配置して，励磁ヨークを励磁したときに発
生する磁束が鋼板を通過する透磁率の方向差，即ち磁気
異方性の大きさを検出コイルに誘起される電圧から検出
する。上記磁気異方性センサから鋼板に与えられる磁束
は，鋼板の初期透磁率の範囲の励磁であるので，鋼板を
着磁させることがない。（請求項２）As described above, according to the present invention, the r value of a rolled steel sheet can be obtained by detecting the magnetic anisotropy from the relationship between the r value and the magnitude of the magnetic anisotropy. Since the magnetic anisotropy measurement is a non-contact, non-destructive measurement in which the magnetic anisotropy sensor is placed close to the surface of the steel sheet, it can be measured from the steel sheet during the rolling process. Therefore, on-line measurement is possible, and fluctuations in r value can be immediately detected, so that adjustments such as rolling conditions can be dealt with, and quality control and quality assurance over the entire length of the steel sheet can be performed. (Claim 1) The magnetic anisotropy is detected by arranging a magnetic anisotropy sensor close to the surface of the rolled steel sheet, and the magnetic flux generated when the excitation yoke is excited passes through the steel sheet in the direction difference of magnetic permeability. That is, the magnitude of magnetic anisotropy is detected from the voltage induced in the detection coil. The magnetic flux applied to the steel sheet from the magnetic anisotropy sensor is the excitation within the range of the initial magnetic permeability of the steel sheet, so that the steel sheet is not magnetized. (Claim 2)
【図１】 本発明の測定方法を適用したｒ値測定装置の
実施例構成を示す模式図。FIG. 1 is a schematic diagram showing an example configuration of an r-value measuring device to which the measuring method of the present invention is applied.
【図２】 実施例に係るセンサ部の構成を示す斜視図。FIG. 2 is a perspective view showing a configuration of a sensor unit according to the embodiment.
【図３】 センサ部と鋼板とが形成する磁気回路図。FIG. 3 is a magnetic circuit diagram formed by a sensor unit and a steel plate.
【図４】 磁気異方性の大きさとｒ値との関係を示すグ
ラフ。FIG. 4 is a graph showing the relationship between the magnitude of magnetic anisotropy and the r value.
【図５】 センサ部を回転させたときの検出出力の変化
を示すグラフ。FIG. 5 is a graph showing changes in detection output when the sensor unit is rotated.
１…ｒ値測定装置 ２…センサ部（磁気異方性センサ） ３…励磁用電源 ４…ロックインアンプ（演算処理装置） ５…コンピュータ（演算処理装置） ６…励磁ヨーク ７…検出ヨーク ８ａ，８ｂ…励磁コイル ９…検出コイル １１…圧延鋼板 DESCRIPTION OF SYMBOLS 1 ... r value measuring device 2 ... sensor part (magnetic anisotropy sensor) 3 ... excitation power supply 4 ... lock-in amplifier (arithmetic processing device) 5 ... computer (arithmetic processing device) 6 ... excitation yoke 7 ... detection yoke 8a, 8b ... Excitation coil 9 ... Detection coil 11 ... Rolled steel plate
フロントページの続き (72)発明者 森本 勉 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所神戸総合技術研究所内 (72)発明者 高岡 克也 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所神戸総合技術研究所内 (72)発明者 新井 明男 兵庫県加古川市金沢町１番地 株式会社神 戸製鋼所加古川製鉄所内Front page continuation (72) Inventor Tsutomu Morimoto 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Inside Kobe Research Institute of Kobe Steel, Ltd. (72) Inventor Katsuya Takaoka 1-chome, Takatsuka, Nishi-ku, Kobe No. 5-5 Kobe Steel Works, Ltd. Kobe Research Institute (72) Inventor Akio Arai 1 Kanazawa-machi, Kakogawa City, Hyogo Prefecture Kadogawa Works Kakogawa Works
Claims (3)
において，上記圧延鋼板の磁気異方性を検出することに
より，走行中の圧延鋼板のｒ値を求めることを特徴とす
る圧延鋼板のｒ値測定方法。1. A method for measuring the r-value of a rolled steel sheet during a rolling process, wherein the r-value of a running rolled steel sheet is determined by detecting the magnetic anisotropy of the rolled steel sheet. R value measurement method.
において，コの字状に形成された励磁ヨークと検出ヨー
クとを直交配置すると共に，上記励磁ヨークに励磁コイ
ル，検出ヨークに検出コイルを設けて，各ヨークの端部
を磁極とする磁気異方性センサを構成し，上記各磁極を
上記圧延鋼板の表面に平行に配設して，上記励磁コイル
に所定周波数，所定電流を印加して上記励磁ヨークを励
磁したときに，上記検出コイルに誘起される電圧を検出
することにより，上記圧延鋼板の磁気異方性の大きさを
求め，該磁気異方性とｒ値との関係から上記ｒ値を算出
することを特徴とする圧延鋼板のｒ値測定装置。2. An apparatus for measuring the r-value of a steel sheet during a rolling process, wherein an excitation yoke and a detection yoke formed in a U-shape are orthogonally arranged, and the excitation yoke and the detection yoke detect the excitation yoke. A coil is provided to form a magnetic anisotropy sensor using the ends of the yokes as magnetic poles, and the magnetic poles are arranged in parallel with the surface of the rolled steel plate, and a predetermined frequency and a predetermined current are applied to the exciting coil. The magnitude of the magnetic anisotropy of the rolled steel sheet is obtained by detecting the voltage induced in the detection coil when the excitation yoke is excited to apply the magnetic anisotropy to the r value. An r-value measuring device for a rolled steel sheet, wherein the r-value is calculated from a relationship.
の圧延方向に対して所定角度傾けて配置したときの電圧
を測定する請求項２記載の圧延鋼板のｒ値測定装置。3. The r-value measuring device for a rolled steel sheet according to claim 2, wherein a voltage is measured when the magnetic poles of the magnetic anisotropy sensor are arranged at a predetermined angle with respect to the rolling direction of the steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11643894A JPH07318535A (en) | 1994-05-30 | 1994-05-30 | Method and apparatus for measuring r value for rolled steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11643894A JPH07318535A (en) | 1994-05-30 | 1994-05-30 | Method and apparatus for measuring r value for rolled steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07318535A true JPH07318535A (en) | 1995-12-08 |
Family
ID=14687115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11643894A Pending JPH07318535A (en) | 1994-05-30 | 1994-05-30 | Method and apparatus for measuring r value for rolled steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07318535A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020218192A1 (en) * | 2019-04-22 | 2020-10-29 | Ｊｆｅスチール株式会社 | Rolled steel sheet metal structure evaluation device, rolled steel sheet metal structure evaluation method, steel material manufacturing equipment, steel material manufacturing method, and steel material quality control method |
| RU2784421C1 (en) * | 2019-04-22 | 2022-11-24 | ДжФЕ СТИЛ КОРПОРЕЙШН | Apparatus for assessing the structure of metal of rolled steel sheets, method for assessing the structure of metal of a rolled steel sheet, production equipment for manufacturing a steel article, method for manufacturing a steel article, and method for controlling the quality of a steel article |
-
1994
- 1994-05-30 JP JP11643894A patent/JPH07318535A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020218192A1 (en) * | 2019-04-22 | 2020-10-29 | Ｊｆｅスチール株式会社 | Rolled steel sheet metal structure evaluation device, rolled steel sheet metal structure evaluation method, steel material manufacturing equipment, steel material manufacturing method, and steel material quality control method |
| JPWO2020218192A1 (en) * | 2019-04-22 | 2021-05-06 | Ｊｆｅスチール株式会社 | Metal structure evaluation device for rolled steel sheet, metal structure evaluation method for rolled steel sheet, steel material manufacturing equipment, steel material manufacturing method, and steel material quality control method |
| KR20210138060A (en) * | 2019-04-22 | 2021-11-18 | 제이에프이 스틸 가부시키가이샤 | Metal structure evaluation apparatus of rolled steel sheet, metal structure evaluation method of rolled steel sheet, manufacturing equipment of steel, manufacturing method of steel, and quality control method of steel |
| CN113711027A (en) * | 2019-04-22 | 2021-11-26 | 杰富意钢铁株式会社 | Device for evaluating microstructure of rolled steel sheet, method for evaluating microstructure of rolled steel sheet, steel product manufacturing facility, steel product manufacturing method, and steel product quality management method |
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| RU2784421C1 (en) * | 2019-04-22 | 2022-11-24 | ДжФЕ СТИЛ КОРПОРЕЙШН | Apparatus for assessing the structure of metal of rolled steel sheets, method for assessing the structure of metal of a rolled steel sheet, production equipment for manufacturing a steel article, method for manufacturing a steel article, and method for controlling the quality of a steel article |
| US11933762B2 (en) | 2019-04-22 | 2024-03-19 | Jfe Steel Corporation | Metal structure evaluator for rolled steel sheets, method for evaluating metal structure of rolled steel sheet, production facility of steel product, method for manufacturing steel product, and method of quality management of steel product |
| CN113711027B (en) * | 2019-04-22 | 2024-09-10 | 杰富意钢铁株式会社 | Apparatus for evaluating microstructure of rolled steel sheet, method for evaluating microstructure of rolled steel sheet, apparatus for producing steel material, method for producing steel material, and method for managing quality of steel material |
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