JPH0853726A - Pure titanium thin sheet for roll forming and its production - Google Patents
Pure titanium thin sheet for roll forming and its productionInfo
- Publication number
- JPH0853726A JPH0853726A JP18752894A JP18752894A JPH0853726A JP H0853726 A JPH0853726 A JP H0853726A JP 18752894 A JP18752894 A JP 18752894A JP 18752894 A JP18752894 A JP 18752894A JP H0853726 A JPH0853726 A JP H0853726A
- Authority
- JP
- Japan
- Prior art keywords
- pure titanium
- titanium thin
- roll forming
- thin sheet
- cold rolling
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、図１に示すような形材
にロール成形を行う際に生じる波状の形状不良（ポケッ
トウェーブ）の発生を効果的に低減したロール成形用純
チタン薄板およびその製造方法に関するものである。こ
の純チタン薄板から成形された形材は、屋根や外装等に
使用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pure titanium thin plate for roll forming, which effectively reduces the generation of wavy shape defects (pocket waves) that occur when roll forming is performed on a profile as shown in FIG. The present invention relates to a manufacturing method thereof. The profile formed from this pure titanium thin plate is used for roofs, exteriors, and the like.
【０００２】[0002]
【従来の技術】薄鋼板のロール成形性を検討した例とし
て、塑性と加工Vol.20,No.225(1979)P.933等がある。し
かし、純チタン薄板の材質は、冷間圧延方向（Ｌ方向）
に直角な方向（Ｔ方向）のｒ値が薄鋼板に比べて異常に
大きい等、薄鋼板の材質と種々の点で異なるので、その
知見をそのまま活かせない。2. Description of the Related Art Plasticity and working Vol.20, No.225 (1979) P.933 are examples of studies on roll formability of thin steel sheets. However, the material of the pure titanium sheet is cold rolling direction (L direction).
Since the r value in the direction perpendicular to the direction (T direction) is abnormally large as compared with the thin steel sheet, and the like, it is different from the material of the thin steel sheet in various points, so that knowledge cannot be utilized as it is.
【０００３】一方、建材用純チタン薄板に関する技術
が、特開平１−９６３６２号公報に開示されている。こ
の技術は、冷間圧延および連続焼鈍を行うことによって
製造される成形加工用純チタン薄板であって、平均結晶
粒径が５〜２８μｍであり、かつ前記焼鈍の直後から加
工成形までの間に弾性限を超える加工成形が与えられて
おらず、少なくとも圧延方向に対して直角方向に変形し
た際に降伏現象を示すことを特徴とするものである。On the other hand, a technique relating to a pure titanium thin plate for building materials is disclosed in Japanese Patent Application Laid-Open No. 1-96362. This technique is a pure titanium thin plate for forming, which is manufactured by performing cold rolling and continuous annealing, and has an average crystal grain size of 5 to 28 μm, and between immediately after the annealing and before forming. It is characterized in that it is not provided with work forming exceeding the elastic limit and exhibits a yielding phenomenon when deformed at least in the direction perpendicular to the rolling direction.
【０００４】しかし、この方法で純チタン薄板を製造す
る場合、焼鈍の直後から加工成形までの間に弾性限を超
える変形を付与出来ないので、焼鈍後に形状を矯正する
ことが出来ない。冷間圧延および連続焼鈍処理工程のみ
にて、形状の優れた純チタン薄板を造らねばならないの
で、製造条件の制約が多い。連続焼鈍では、コイルの状
態で焼鈍する方法と比較して、形状の優れた板が得られ
るが、例えば冷間圧延で生じる耳波等の形状不良は、完
全には矯正できない。However, in the case of producing a pure titanium thin plate by this method, deformation beyond the elastic limit cannot be imparted between immediately after annealing and before forming, so that the shape cannot be corrected after annealing. Since it is necessary to produce a pure titanium thin plate having an excellent shape only by the cold rolling and continuous annealing treatment steps, there are many restrictions on manufacturing conditions. In continuous annealing, a plate having an excellent shape can be obtained as compared with the method of annealing in the state of a coil, but a shape defect such as an ear wave generated in cold rolling cannot be completely corrected.
【０００５】また、建材用の純チタン薄板では、その表
面性状を様々な肌に調整するために、例えば、ダル仕上
げ圧延肌が要望されることがある。しかし、この従来技
術では、焼鈍の直後から成形加工までの間に弾性限を超
える変形を付与することが出来ないのでダル仕上げ圧延
を実施することができない。Further, in the case of a pure titanium thin plate for a building material, in order to adjust its surface texture to various skins, for example, a dull finish rolled skin may be required. However, in this conventional technique, since it is not possible to give a deformation exceeding the elastic limit between immediately after annealing and before forming, dull finish rolling cannot be performed.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、ロール成形
機により純チタン薄板を形材に成形した時に生じるポケ
ットウェーブを効果的に低減するとともに、従来技術で
は出来なかった形状矯正やダル仕上げ圧延が実施できる
純チタン薄板およびその製造方法を提供することを目的
とする。SUMMARY OF THE INVENTION The present invention effectively reduces pocket waves generated when a pure titanium thin plate is formed into a shape by a roll forming machine, and corrects shape and dull finish rolling which cannot be achieved by conventional techniques. It is an object of the present invention to provide a pure titanium thin plate that can be carried out and a method for manufacturing the same.
【０００７】[0007]
【課題を解決するための手段】本発明は、Ｔ方向のｒ値
が歪量２％のときに４以下であり、かつＴ方向の０．２
％耐力が２８０MPa 以上４００MPa 以下であることを特
徴とするロール成形用純チタン薄板であり、これにより
前記課題を解決するものである。また、その製造方法
は、冷間圧延用素材を冷間圧延し、続いて焼鈍し、続い
て冷間圧延方向に４％以上２０％以下の冷間加工を加え
ることを特徴とする。According to the present invention, the r value in the T direction is 4 or less when the strain amount is 2%, and 0.2 in the T direction.
The pure titanium thin plate for roll forming is characterized by having a% proof stress of 280 MPa or more and 400 MPa or less, thereby solving the above problems. Further, the manufacturing method is characterized in that the material for cold rolling is cold-rolled, subsequently annealed, and subsequently cold-worked at 4% or more and 20% or less in the cold rolling direction.
【０００８】本発明者は、鋭意研究した結果、下記の作
用によりポケットウェーブが低減するという知見を得
た。ロール成形の特徴として、板の端部がＴ方向に折り
曲げられると幅方向には引張応力が発生する。このとき
長手方向には圧縮力が発生し、塑性変形域に至ると折り
曲げ部は長手方向に縮み、さらに圧縮応力がウェッブ部
の挫屈応力を越えるとポケットウェーブが発生すると考
えられる。ここで、薄鋼材のＴ方向のｒ値は、約１であ
るが、通常の純チタン薄板のｒ値は、６〜１０で異常に
大きい。Ｔ方向のｒ値が大きいと、ロール成形時、長手
方向に大きな圧縮力が発生し、折り曲げ部は長手方向に
縮みやすく、ポケットウェーブが発生しやすい。それゆ
え、本発明においてはＴ方向のｒ値を小さく制限した。As a result of intensive studies, the present inventor has found that pocket waves are reduced by the following action. As a characteristic of roll forming, when the end portion of the plate is bent in the T direction, tensile stress is generated in the width direction. At this time, it is considered that a compressive force is generated in the longitudinal direction, the bent portion is contracted in the longitudinal direction when reaching the plastic deformation region, and pocket waves are generated when the compressive stress exceeds the buckling stress of the web portion. Here, the r value of the thin steel material in the T direction is about 1, but the r value of a normal pure titanium thin plate is 6 to 10 and is abnormally large. When the r value in the T direction is large, a large compressive force is generated in the longitudinal direction during roll forming, the bent portion is likely to contract in the longitudinal direction, and pocket waves are likely to occur. Therefore, in the present invention, the r value in the T direction is limited to a small value.
【０００９】さらに、薄鋼板のＴ方向の上降伏強さは、
３００〜３５０MPa であるが、通常の純チタン薄板（Ｊ
ＩＳ１種）のＴ方向の０．２％耐力は、２００〜２４０
MPaで小さい。この値が小さいと、ロール成形時に、板
の端部がＴ方向に折り曲げられる過程で幅方向に発生し
た引張応力によって、折り曲げ部は塑性変形域に至りや
すく、長手方向に発生した圧縮応力によってポケットウ
ェーブを発生しやすい、それゆえ、本発明においてはＴ
方向の０．２％耐力を大きい値に制限した。Further, the upper yield strength of the thin steel sheet in the T direction is
300-350MPa, but ordinary pure titanium thin plate (J
0.2% proof stress in the T direction of IS1) is 200 to 240
Small in MPa. If this value is small, the bending portion is likely to reach the plastic deformation region due to the tensile stress generated in the width direction during the roll forming when the end portion of the plate is bent in the T direction, and the compressive stress generated in the longitudinal direction causes pockets to bend. Waves are apt to occur, and therefore T is used in the present invention.
The 0.2% proof stress in the direction was limited to a large value.
【００１０】次に、Ｔ方向のｒ値を歪量２％のときに４
以下とし、かつＴ方向の０．２％耐力を２８０MPa 以上
４００MPa 以下としたのは、両方をともに満足させるこ
とにより、ポケットウェーブの発生を効果的に抑制でき
るからである。代表的なロール成形方法により、代表的
なサイズを成形する際に、Ｔ方向のｒ値が歪量２％のと
きに４以下であり、かつＴ方向の０．２％耐力が２８０
MPa 以上の純チタン薄板は、ポケットウェーブの急峻度
は、０．２％以下となり目立たなくなる。尚、Ｔ方向の
０．２％耐力の上限は、約４００MPa であり、これを超
えると密着曲げによる割れが懸念される。Next, the r value in the T direction is 4 when the strain amount is 2%.
The reason why the 0.2% proof stress in the T direction is set to 280 MPa or more and 400 MPa or less is that the occurrence of pocket waves can be effectively suppressed by satisfying both of them. When a typical size is formed by a typical roll forming method, the r value in the T direction is 4 or less when the strain amount is 2%, and the 0.2% proof stress in the T direction is 280.
The pure titanium thin plate having a pressure of MPa or more has a steepness of pocket wave of 0.2% or less and becomes inconspicuous. The upper limit of the 0.2% proof stress in the T direction is about 400 MPa, and if it exceeds this, there is a fear of cracking due to close bending.
【００１１】このような特性を備えた純チタン薄板は、
形状矯正中または形状矯正後に冷間圧延方向に焼鈍後の
板厚を基準にして４％以上の冷間加工を与えることによ
り得られる。それゆえ、形状矯正やダル圧延で加わる塑
性変形は、全く問題がなく、必要に応じて実施できる。
仕上げ冷間加工の方法は、ロールによる冷間圧延、引張
応力を加えて伸ばす方法、レベラー矯正による方法、ま
たはこれらの組み合わせのいずれであってもよい。尚、
２０％を超える冷間加工は、Ｔ方向の０．２％耐力が約
４００MPa 以上となり、密着曲げによる割れが懸念され
るため好ましくない。A pure titanium thin plate having such characteristics is
It can be obtained by applying cold working of 4% or more based on the sheet thickness after annealing in the cold rolling direction during or after the shape correction. Therefore, the plastic deformation applied by the shape correction and the dull rolling has no problem at all and can be carried out as necessary.
The method of finish cold working may be any of cold rolling with a roll, a method of stretching by applying tensile stress, a method of leveler straightening, or a combination thereof. still,
Cold working over 20% is not preferable because 0.2% proof stress in the T direction becomes about 400 MPa or more, and cracking due to close bending may occur.
【００１２】[0012]
【実施例】純チタンＪＩＳ１種と２種、粒径２５〜５５
μｍ、板厚約０．４mm、板幅３１０mmの各種材質の純チ
タン薄板を供試材とした。表１のNo．１〜No．７が本発
明例であり、これらは、焼鈍後に形状矯正中またはその
後に、所定の冷間加工率を与え、各種の材質のものとし
た。No．８は、通常材の比較例。No．１０は、連続焼鈍
ままの材料であり、Ｔ方向の降伏伸びが０．７％ある。[Example] Pure titanium JIS type 1 and type 2, particle size 25-55
Pure titanium thin plates of various materials having a thickness of 0.4 μm, a plate thickness of about 0.4 mm and a plate width of 310 mm were used as test materials. Table 1 No. 1-No. No. 7 is an example of the present invention, and these are made of various materials by giving a predetermined cold working rate during or after shape correction after annealing. No. 8 is a comparative example of a normal material. No. No. 10 is a material that has been continuously annealed and has a yield elongation in the T direction of 0.7%.
【００１３】ロール成形の方法は、形材の断面が、図３
に示すようなコの字型であり、ウェッブ部２の幅が２５
０mmで、両端部は折り曲げ部３より３０mmほど９０度に
立てた。ロール段数は、４段であり、それらの曲げ角度
は、３０，４５，７５，９０度である。ロールのギャッ
プは、約０．５mmとした。ポケットウェーブ４の大きさ
は、板幅中央部での急峻度を測定し、３点の平均値とし
た。目標の急峻度は、０．２％以下とした。０．２％以
下になると目視による観察では、ほとんど目立たない。
急峻度は、形材の幅方向の中央部でのポケットウェーブ
の高さと同じ位置でのポケットウェーブのすそ野の長さ
（形材の長手方向）を測定し、高さを長さで割った値と
した。The roll forming method is as shown in FIG.
And the width of the web portion 2 is 25
The length was 0 mm, and both ends were set up at an angle of 90 mm from the bent portion 3 by about 30 mm. The number of roll stages is 4, and the bending angles thereof are 30, 45, 75 and 90 degrees. The roll gap was about 0.5 mm. The size of the pocket wave 4 was determined by measuring the steepness in the central portion of the plate width and taking the average value of three points. The target steepness was 0.2% or less. When it is 0.2% or less, it is hardly noticeable by visual observation.
The steepness is a value obtained by measuring the length of the pocket wave skirt (longitudinal direction of the profile) at the same position as the height of the pocket wave at the center of the profile in the width direction and dividing the height by the length. And
【００１４】ロール成形試験の結果は、表１に示すよう
に本発明のＴ方向のｒ値が歪量２％のときに４以下であ
り、かつＴ方向の０．２％耐力が２８０MPa 以上である
場合にはポケットウェーブの発生を効果的に抑制できる
ことが分かる。As shown in Table 1, the result of the roll forming test is 4 or less when the r value in the T direction of the present invention is a strain amount of 2%, and the 0.2% proof stress in the T direction is 280 MPa or more. It can be seen that the occurrence of pocket waves can be effectively suppressed in some cases.
【００１５】また、４％以上の冷間加工により、Ｔ方向
のｒ値が歪量２％のときに４以下であり、かつＴ方向の
０．２％耐力が２８０MPa 以上のロール成形用純チタン
薄板が得られることが分かる。図１に表１の結果に基づ
くＴ方向の耐力（０．２％）とｒ値（歪量２％）との関
係（図中の数字はポケットウェーブの急峻度）、図２は
冷間圧延率とＴ方向のｒ値（歪量２％）との関係を示
す。Pure titanium for roll forming having a r value in the T direction of 4% or less when the strain amount of 2% and a 0.2% proof stress in the T direction of 280 MPa or more are obtained by cold working of 4% or more. It can be seen that a thin plate can be obtained. FIG. 1 shows the relationship between the proof stress (0.2%) in the T direction and the r value (strain amount 2%) based on the results in Table 1 (the numbers in the figure are the steepness of pocket waves), and FIG. 2 is the cold rolling. The relationship between the ratio and the r value in the T direction (strain amount 2%) is shown.
【００１６】[0016]
【表１】 [Table 1]
【００１７】尚、曲げ加工性は、建材用途に必要な特性
である。本発明の材料は、Ｌ方向、Ｔ方向ともに密着曲
げにより割れは発生しない。The bendability is a characteristic required for building materials. The material of the present invention does not cause cracks due to close bending in both the L direction and the T direction.
【００１８】[0018]
【発明の効果】本発明により、ロール成形機により純チ
タン薄板を形材に成形した時に生じる波状の形状不良
（ポケットウェーブ）を効果的に低減出来るとともに、
従来技術では出来なかった形状矯正やダル圧延が必要に
応じて実施出来るので形状が良好であり、さらに表面が
ダル化した純チタン薄板も提供できる。According to the present invention, it is possible to effectively reduce a wavy shape defect (pocket wave) that occurs when a pure titanium thin plate is formed into a shape by a roll forming machine.
Shape correction and dull rolling, which could not be done by conventional techniques, can be carried out as needed, so that the shape is good, and a pure titanium thin plate having a dull surface can also be provided.
【図１】Ｔ方向の０．２％耐力とＴ方向のｒ値（歪量２
％）の関係を示す図（図中のプロットは表１のデータで
あり、図中の数字はポケットウェーブの急峻度（％）で
ある。）。FIG. 1 0.2% proof stress in T direction and r value in T direction (strain amount 2
%)) (The plot in the figure is the data in Table 1, and the numbers in the figure are the steepness (%) of pocket waves).
【図２】冷間圧延率（％）とＴ方向のｒ値（歪量２％）
の関係を示す図。FIG. 2 Cold rolling rate (%) and r value in T direction (strain amount 2%)
FIG.
【図３】ロール成形品を示す図。FIG. 3 is a diagram showing a roll-formed product.
１…純チタン薄板 ２…ウェッブ部 ３…折り曲げ部 ４…ポケットウェーブ 1 ... Pure titanium thin plate 2 ... Web part 3 ... Bent part 4 ... Pocket wave
───────────────────────────────────────────────────── フロントページの続き (72)発明者 木村 欽一 山口県光市大字島田3434番地 新日本製鐵 株式会社光製鐵所内 (72)発明者 西田 祚章 山口県光市大字島田3434番地 新日本製鐵 株式会社光製鐵所内 (72)発明者 阿高 松男 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kinichi Kimura 3434 Shimada, Hikari-shi, Yamaguchi Prefecture Inside the Nippon Steel Co., Ltd. Hikari Steel Works (72) Inventor Nishida Hisho 3434 Shimada, Hikari-shi, Yamaguchi Prefecture New Japan Hikari Steel Works, Ltd. (72) Inventor Matsuo Ataka 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd. Technology Development Division
Claims (2)
ランクフォード値（ｒ値）が歪量２％のときに４以下で
あり、かつＴ方向の０．２％耐力が２８０MPa 以上４０
０MPa 以下であることを特徴とするロール成形用純チタ
ン薄板。1. The Rankford value (r value) in the direction (T direction) perpendicular to the cold rolling direction is 4 or less when the strain amount is 2%, and the 0.2% proof stress in the T direction is 280 MPa or more. 40
A pure titanium thin plate for roll forming, which has a pressure of 0 MPa or less.
鈍し、続いて冷間圧延方向に４％以上２０％以下の仕上
げ冷間加工を行うことを特徴とするロール成形用純チタ
ン薄板の製造方法。2. A pure material for roll forming, which comprises cold-rolling a cold-rolling material, subsequently annealing it, and then performing finish cold-working in the cold rolling direction by 4% or more and 20% or less. Manufacturing method of titanium thin plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18752894A JPH0853726A (en) | 1994-08-09 | 1994-08-09 | Pure titanium thin sheet for roll forming and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18752894A JPH0853726A (en) | 1994-08-09 | 1994-08-09 | Pure titanium thin sheet for roll forming and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0853726A true JPH0853726A (en) | 1996-02-27 |
Family
ID=16207670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18752894A Pending JPH0853726A (en) | 1994-08-09 | 1994-08-09 | Pure titanium thin sheet for roll forming and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0853726A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4452753B1 (en) * | 2008-12-12 | 2010-04-21 | 株式会社神戸製鋼所 | Titanium or titanium alloy plate with excellent balance of press formability and strength |
| WO2010067843A1 (en) * | 2008-12-12 | 2010-06-17 | 株式会社神戸製鋼所 | Titanium or titanium alloy plate having excellent balance between press formability and strength |
| CN107881447A (en) * | 2017-11-22 | 2018-04-06 | 四川大学 | Pure titanium of a kind of thread crystal grain of high-strength tenacity and preparation method thereof |
| CN110629142A (en) * | 2019-10-23 | 2019-12-31 | 宝鸡市渭滨区怡鑫金属加工厂 | Preparation process of TA3 titanium rod with low iron content and high corrosion resistance |
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1994
- 1994-08-09 JP JP18752894A patent/JPH0853726A/en active Pending
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| JP4452753B1 (en) * | 2008-12-12 | 2010-04-21 | 株式会社神戸製鋼所 | Titanium or titanium alloy plate with excellent balance of press formability and strength |
| WO2010067843A1 (en) * | 2008-12-12 | 2010-06-17 | 株式会社神戸製鋼所 | Titanium or titanium alloy plate having excellent balance between press formability and strength |
| JP2010138459A (en) * | 2008-12-12 | 2010-06-24 | Kobe Steel Ltd | Titanium or titanium alloy sheet excellent in balance between press formability and strength |
| KR101325364B1 (en) * | 2008-12-12 | 2013-11-08 | 가부시키가이샤 고베 세이코쇼 | Titanium or titanium alloy plate having excellent balance between press formability and strength |
| US9790576B2 (en) | 2008-12-12 | 2017-10-17 | Kobe Steel, Ltd. | Titanium or titanium alloy plate excellent in balance between press formability and strength |
| CN107881447A (en) * | 2017-11-22 | 2018-04-06 | 四川大学 | Pure titanium of a kind of thread crystal grain of high-strength tenacity and preparation method thereof |
| CN110629142A (en) * | 2019-10-23 | 2019-12-31 | 宝鸡市渭滨区怡鑫金属加工厂 | Preparation process of TA3 titanium rod with low iron content and high corrosion resistance |
| CN110629142B (en) * | 2019-10-23 | 2021-07-06 | 宝鸡市渭滨区怡鑫金属加工厂 | Preparation process of TA3 titanium rod with low iron content and high corrosion resistance |
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