JPS63114952A - Manufacture of titanium sheet having superior cold rollability - Google Patents
Manufacture of titanium sheet having superior cold rollabilityInfo
- Publication number
- JPS63114952A JPS63114952A JP26070286A JP26070286A JPS63114952A JP S63114952 A JPS63114952 A JP S63114952A JP 26070286 A JP26070286 A JP 26070286A JP 26070286 A JP26070286 A JP 26070286A JP S63114952 A JPS63114952 A JP S63114952A
- Authority
- JP
- Japan
- Prior art keywords
- hot
- rolled
- temperature
- titanium
- hot rolled
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 50
- 229910052719 titanium Inorganic materials 0.000 title claims description 50
- 239000010936 titanium Substances 0.000 title claims description 50
- 238000005098 hot rolling Methods 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims description 18
- 238000000137 annealing Methods 0.000 abstract description 24
- 238000005097 cold rolling Methods 0.000 abstract description 22
- 239000000463 material Substances 0.000 description 35
- 238000000034 method Methods 0.000 description 12
- 238000011835 investigation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000001747 exhibiting effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、優れた冷延性を備えるチタン板を生産性良
く安価に製造する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a titanium plate having excellent cold rollability with high productivity and at low cost.
〈背景技術〉
近年、航空・宇宙産業の目覚ましい発展に伴う使用機器
部材の性能向上要求、更には各種化学工業設備類、海水
利用膜（ＩＩ或いは火力・原子力発電設備類等の高性能
化指向に伴う使用環境の苛酷化に対処すべく、特有の優
れた耐食性、比強度並びに高温クリープ特性等を兼備し
たチタン材料の適用が急増し、次第に冷延薄板材にまで
及ぶようになってきた。そして、冷延薄板は主として熱
交換器用溶接管材及び板状熱交換器材として大量に使用
され始めている。<Background technology> In recent years, with the remarkable development of the aerospace industry, there has been a demand for improved performance of the equipment and components used, and there has also been a trend towards higher performance in various chemical industry equipment, seawater utilization membranes (II or thermal/nuclear power generation equipment, etc.) In order to cope with the accompanying harsher usage environments, the application of titanium materials, which have unique characteristics such as excellent corrosion resistance, specific strength, and high-temperature creep properties, has rapidly increased, and has gradually come to be applied to cold-rolled thin sheets. 2. Description of the Related Art Cold-rolled thin sheets have begun to be used in large quantities, mainly as welded pipe materials for heat exchangers and plate-shaped heat exchanger materials.
ところで、チタンの冷延板材は、従来、８５０〜９５０
℃に加熱したチタンスラブを仕上げ温度＝７５０〜７０
０℃で熱間圧延し５００〜４００℃で巻き取った後、冷
延性改善のための軟化焼鈍（７００℃に１分間程度加熱
保持した後放冷）を施してから７〜８回のバス回数で冷
間圧延し、更に７００〜８００℃で仕上焼鈍すると言う
手段にて製造されるのがｆ通であった。By the way, cold-rolled titanium plate materials have conventionally
Finishing titanium slab heated to ℃ = 750~70
After hot rolling at 0°C and coiling at 500 to 400°C, softening annealing is performed to improve cold rollability (heating and holding at 700°C for about 1 minute, then cooling), followed by 7 to 8 baths. The f type was manufactured by cold rolling at 700 to 800°C and final annealing at 700 to 800°C.
しかし、近年の産業事情は設備機器類の高性能化と共に
低コスト化をも強く求めており、特にチタンのような製
造コストの高い素材においては、極く些細な点にまでも
コストダウンの可能性を見付けようと必死の努力が続け
られてきた。However, in recent years, industrial circumstances have strongly demanded both higher performance and lower costs for equipment, and especially when it comes to materials such as titanium, which have high manufacturing costs, it is possible to reduce costs even in the most trivial aspects. Desperate efforts have been made to find gender.
そして注目されたのが、冷間圧延に先立つ軟化焼鈍の省
略である。What attracted attention was the omission of softening annealing prior to cold rolling.
ところが、チタン冷延板の製造に際して冷間圧延に先立
つ軟化焼鈍を省略すると、冷延性に劣る熱延板の性能改
善がなされないので“冷間圧延時の焼付き発生”や“冷
延バス回数の増加”を抑えることができず、しかもその
後の処理条件や製品性能への悪影響の有無に関する確認
もなされていなかったこともあって、上記軟化焼鈍の省
略に当ってはこれら不都合を生じさせないための何らか
の代替手段を講じて冷延性の向上を図る必要があるとさ
れていた。However, if softening annealing prior to cold rolling is omitted when manufacturing cold-rolled titanium sheets, the performance of the hot-rolled sheets, which have poor cold-rollability, will not be improved, resulting in "seizing during cold rolling" and "the number of cold-rolling baths." In addition, it was not possible to suppress the "increase in the temperature of the product" and furthermore, there was no confirmation as to whether or not there would be an adverse effect on the subsequent processing conditions or product performance.In omitting the above-mentioned softening annealing, it was decided to avoid causing these inconveniences. It was considered necessary to take some alternative means to improve cold rollability.
そこで、このような状況を踏まえ、軟化焼鈍を施さなく
てもそのままで冷間圧延用素材に供することのできるチ
タン熱延板を製造すべく「熱間圧延終了後のチタン板を
強制冷却して５００℃以下の温度で巻取る方法」が提案
された（特開昭５７−１０８２５２号公報）。Therefore, in light of this situation, in order to produce titanium hot-rolled sheets that can be used as raw materials for cold rolling without undergoing softening annealing, we have developed a method that involves forced cooling of titanium sheets after hot rolling. A method of winding at a temperature of 500° C. or lower was proposed (Japanese Patent Application Laid-open No. 108252/1983).
しかしながら、この方法は熱延板焼鈍工程の省略を狙っ
たものではあるが、熱延終了後のチタン板を５００℃以
下の低温まで直ちに強制冷却しなければならないと言う
面倒な操作が必要であり、製造コストの低減に寄与する
効果の程も自ずから制限されるものでしかなかった。However, although this method aims to omit the hot-rolled plate annealing step, it requires a troublesome operation in which the titanium plate must be immediately forcedly cooled to a low temperature of 500°C or less after hot rolling. However, the extent to which it contributes to reducing manufacturing costs is naturally limited.
〈問題点を解決するための手段〉
本発明者等は、上述のような観点から、軟化焼鈍を行わ
なくても〔熱延＋軟化焼鈍〕材と同等の良好な冷延特性
を有し、しかもその他の所要特性にも悪影響をもたらす
ことの無いチタン熱延板を、面倒な付加的処理操作を要
することなく高能率でかつ安定に生産し得る手段につい
て研究を行い、「従来の冷間圧延に先立つチタン熱延板
の軟化焼鈍は殆んど純粋に“冷延性の改善”に係わるも
のでしかなく、該焼鈍工程の有無、ましてやその焼鈍条
件等は“冷延・仕上焼鈍後のチタン板”の特性値に殆ん
ど影響を与えない」
ことを確認した上で、更に、
「チタン熱延板の冷延性改善には材料強度（降伏強度）
を低減することが最も重要である」との視点に立って熱
延板強度と冷延性との関係、並びに熱延条件と熱延板強
度との関係解明を目指した研究を重ねた結果、以下（ａ
）〜（Ｃ）に示す如き知見を得るに至ったのである。即
ち、
＋ａ） チタン熱延板の降伏強度が３２ｋｇｆ／ｍｍ
”以下（以降、降伏強度は圧延方向についての値とする
）であるとその後の冷間圧延時に焼付き現象を発生する
ことが皆無となり、更に該降伏強度が２９ｋｇｆ／ｍｍ
２以下になると、同一潤滑条件で冷間圧延した場合の必
要冷延パス回数が明らかに減少すること。<Means for Solving the Problems> From the above-mentioned viewpoint, the present inventors have developed a material that has good cold rolling properties equivalent to a [hot rolled + softening annealed] material even without softening annealing. In addition, we conducted research on a method to produce hot-rolled titanium sheets in a highly efficient and stable manner without the need for troublesome additional processing operations, without adversely affecting other required properties. The softening annealing of hot-rolled titanium sheets prior to the process is almost purely related to "improving cold rollability," and the presence or absence of this annealing process, and even more so, the annealing conditions, etc. After confirming that ``it has almost no effect on the characteristic values of titanium hot-rolled sheets'', we further confirmed that ``Material strength (yield strength)
The most important thing is to reduce the (a
) to (C). That is, +a) The yield strength of the hot-rolled titanium plate is 32 kgf/mm.
``If the yield strength is below (hereinafter, the value in the rolling direction), there will be no seizure phenomenon during subsequent cold rolling, and the yield strength is 29 kgf/mm.
When it is less than 2, the number of cold rolling passes required when cold rolling is performed under the same lubrication conditions is clearly reduced.
Ｃｂｌ 熱延ままのチタン板材（軟化焼鈍無しの材料
）での“降伏強度に及ぼす巻取り温度の影響”は巻取り
温度＝５５０℃を境にして大きく異なり、５５０℃以上
の高温巻き取り領域に踏み込むと熱延材は急激に軟化す
る傾向を見せ始め、５００〜４００℃で巻き取ってから
軟化焼鈍を施して得られる従来材と同等の降伏強度とな
ること。Cbl The "effect of coiling temperature on yield strength" of as-hot-rolled titanium plate material (material without softening annealing) varies greatly after the coiling temperature is 550℃, and in the high temperature coiling region of 550℃ or higher. When stepped on, the hot-rolled material begins to show a tendency to soften rapidly, and has a yield strength equivalent to that of conventional material obtained by winding at 500 to 400°C and then softening annealing.
（ｃ＋ 更に、巻取り温度を上記の如き高温領域に設
定した後、熱間圧延の仕上温度を従来の７５０〜７００
℃の領域よりも低い７００℃以下の温度とすると、高温
巻取りによって得られる熱延板の軟化傾向は一層増大し
、従来の軟化焼鈍材よりも更に低い降伏強度のチタン熱
延板が安定して得られるようになること。(c+ Furthermore, after setting the coiling temperature to the high temperature range as described above, the finishing temperature of hot rolling was set to the conventional 750 to 700.
When the temperature is set to 700°C or less, which is lower than the range of 700°C, the softening tendency of the hot-rolled sheet obtained by high-temperature coiling further increases, and the titanium hot-rolled sheet with a yield strength even lower than that of conventional softened annealed materials becomes stable. to be able to obtain
この発明は、上記知見に基づいてなされたものであり、
連続熱間圧延機で熱延チタン板を製造するに際し、熱延
ストリップを５５０℃以上の高温でコイルに巻き取るこ
とにより、或いは熱間圧延を７００℃以下の温度で終了
すると共に熱延ストリップを５５０℃以上の高温でコイ
ルに巻き取ることにより、熱間圧延のままで十分に優れ
た冷延性を有するチタン板を安定生産し得るようにした
点、に特徴を有するものである。This invention was made based on the above knowledge, and when manufacturing a hot rolled titanium plate using a continuous hot rolling mill, it is possible to produce a hot rolled titanium plate by winding a hot rolled strip into a coil at a high temperature of 550°C or higher, or By finishing the rolling at a temperature of 700°C or lower and winding the hot-rolled strip into a coil at a high temperature of 550°C or higher, it is possible to stably produce titanium sheets that have sufficiently excellent cold rollability as hot-rolled. It is characterized by the following points.
なお、この発明の方法は通常の純チタン（ＪＩＳ１種〜
３種）等、全てのチタン板の製造に適用可能であること
は言うまでもない。Note that the method of this invention uses ordinary pure titanium (JIS Class 1~
Needless to say, it is applicable to the production of all titanium plates such as type 3).
もっとも、［チタン熱延板の製造に際して、熱延終了後
のチタン板を４５０℃以上の温度で巻取る」との技術的
事項のみを取り出せば、この出願前に頒布された特開昭
５３−１１２２４６号公報に記載されたものと類似して
いると見れないこともない。しかしながら、該特許公開
公報に記載の発明において巻取り温度を上記範囲に限定
した理由は「乱巻き・ともずれ疵等の発生を防止し、表
面品質の優れたコイルを得る」点にあり、「熱延板焼鈍
を施すことなく良好な冷延性を備えしめる」と言うこの
発明の目的とは全く異なるもので、従って巻取り温度範
囲もこの発明における「５５０°Ｃ以上」とは著しく異
なるものである。However, if we take only the technical matter that ``in the production of hot-rolled titanium sheets, the titanium sheet after hot-rolling is rolled at a temperature of 450°C or higher'', it is clear that It does not seem that it is similar to that described in JP-A No. 112246. However, the reason for limiting the winding temperature to the above range in the invention described in the patent publication is to "prevent the occurrence of irregular winding, misalignment, etc., and obtain a coil with excellent surface quality." This is completely different from the purpose of this invention, which is to provide good cold rollability without hot-rolled sheet annealing, and therefore the coiling temperature range is also significantly different from ``550°C or higher'' in this invention. be.
次いで、この発明の方法において、巻取り温度、或いは
更に熱延仕上温度を前記の如くに数値限定した理由をよ
り具体的に説明する。Next, in the method of the present invention, the reason why the winding temperature or further the hot rolling finishing temperature is numerically limited as described above will be explained in more detail.
＾）巻取り温度
熱間圧延終了後の巻取り温度が５５０℃未満になるとチ
タン熱延板の強度が急激に高くなって冷延性が劣化し、
そのままでは冷間圧延の際に焼付きを発生したり、冷延
時のパス回数増加を止むなくされたりすることから、上
記巻取り温度を５５０℃以上と限定した。なお、上記観
点からは巻取り温度の上限は格別に制限されるものでは
ないが、熱間圧延仕上温度等の関係から望ましくは７０
０℃以下に調整するのが良い。^) Coiling temperature If the coiling temperature after hot rolling is less than 550°C, the strength of the titanium hot-rolled sheet will increase rapidly and the cold rollability will deteriorate.
If left as is, seizure would occur during cold rolling and the number of passes during cold rolling would have to be increased, so the above-mentioned winding temperature was limited to 550° C. or higher. Incidentally, from the above point of view, the upper limit of the winding temperature is not particularly limited, but it is preferably 70°C in view of the hot rolling finishing temperature, etc.
It is best to adjust the temperature to below 0°C.
さて、第１図は、２５龍厚のＪＴＳ ２種チタン材鍛造
材を
加熱温度：９００℃、
仕上温度ニア５０℃、
巻取り温度：４００〜７００℃
の条件で仕上げ板厚：４＋＊ｍに熱間圧延し、その後焼
鈍処理（７００℃に１分間加熱・保持後放冷）した比較
材と、熱間圧延のままで焼鈍処理を施さなかった熱延板
とにおける「熱延巻取り温度と降伏強度との関係」の調
査結果を示したグラフであるが、この第１図からも、熱
延ままの材料の降伏強度は巻取り温度が約５５０℃以上
の高温になると急激に低下し、軟化焼鈍材と同等の値を
示すようになることが分かる。Now, Figure 1 shows a JTS type 2 titanium forged material with a thickness of 25 mm heated to 900°C, finishing temperature near 50°C, and winding temperature: 400 to 700°C to a finished plate thickness of 4+*m. "Hot-rolled coiling temperature and This is a graph showing the results of the investigation on the relationship between yield strength and yield strength.As can be seen from Figure 1, the yield strength of as-hot-rolled material decreases rapidly when the coiling temperature reaches a high temperature of approximately 550°C or higher. It can be seen that the value is equivalent to that of the softened annealed material.
そして、第２図は、前記“軟化焼鈍処理材”と“熱延ま
まの材料”とについて４００℃巻取り材及び６００℃巻
取り材のミクロｍ織を比較した顕微鏡写真図（倍率：１
００倍）であるが、この第２図からも、“熱延ままの材
料”を６００℃の高温巻取すした場合の組織は焼鈍処理
材と同様に再結晶組織を呈していることが明らかであり
、高温巻取りによる熱延ままの材の降伏強度低下は“巻
取り時及びこれに続く冷却時の自己焼鈍による再結晶軟
化”によるものであることが分かる。FIG. 2 is a micrograph (magnification: 1
However, it is clear from Figure 2 that the structure when the "as-hot-rolled material" is coiled at a high temperature of 600°C exhibits a recrystallized structure similar to the annealed material. It can be seen that the decrease in yield strength of the as-hot-rolled material due to high-temperature coiling is due to "recrystallization softening due to self-annealing during coiling and subsequent cooling."
Ｂ）熱間圧延仕上温度
高温巻取りを施すと共に熱間圧延の仕上温度を調整して
熱延チタン板の冷延性の更なる改善を図ろうとする場合
に、上記仕上温度が７００℃を越えると従来の軟化焼鈍
材を越えて良好な冷延性を確保できなくなることから、
この場合の熱延仕上温度は７００℃以下と限定した。な
お、熱延仕上温度の下限は巻取り温度が５５０℃以上に
なるように調整すれば良い。B) Hot-rolling finishing temperature When attempting to further improve the cold rollability of a hot-rolled titanium sheet by performing high-temperature winding and adjusting the finishing temperature of hot rolling, if the finishing temperature exceeds 700°C. Because it is no longer possible to secure good cold rollability over conventional softened annealed materials,
The hot rolling finishing temperature in this case was limited to 700°C or less. Note that the lower limit of the hot rolling finishing temperature may be adjusted so that the winding temperature is 550° C. or higher.
さて、第３図は、第１図の結果を得たと同様の２５１１
厚のＪＴＳ ２種チタン材鍛造材を加熱温度＝９００℃
、
仕上温度：６５０℃、
巻取り温度：４００〜６５０℃
の条件で仕上げ板厚＝３鶴に熱間圧延し、その後焼鈍処
理（７００℃に１分間加熱・保持後放冷）した比較材と
、熱間圧延のままで焼鈍処理を施さなかった熱延板とに
おける［熱延巻取り温度と降伏強度との関係」の調査結
果を示したグラフであるが、この場合も第１図における
と同様に巻取り温度が５５０℃で焼鈍材と同等の降伏強
度となり、巻取り温度が５５０℃を上回るにつれて熱延
ままの材料の方がより一層の軟化傾向を示すことが分か
る。Now, Figure 3 shows the same 2511 results as in Figure 1.
Heating temperature of thick JTS type 2 titanium forged material = 900℃
, Finishing temperature: 650°C, Winding temperature: 400-650°C, and the comparison material was hot-rolled to a finished plate thickness of 3 cranes, and then annealed (heated to 700°C for 1 minute, held, and then allowed to cool). , is a graph showing the results of an investigation on the relationship between hot-rolled coiling temperature and yield strength for a hot-rolled sheet that has been hot-rolled but not annealed; Similarly, it can be seen that when the coiling temperature is 550°C, the yield strength is equivalent to that of the annealed material, and as the coiling temperature exceeds 550°C, the as-hot-rolled material shows a further softening tendency.
更に、第４図は、第１図及び第３図の結果を得たと同様
の２５ｍｍＪ￥のＪＩＳ ２種チタン材鍛造材を加熱温
度：９００℃、
仕上温度７６００〜８００℃、
巻取り温度：６００°Ｃ
の条件で仕上げ板厚：３龍に熱間圧延したままの熱延板
における「仕上温度と降伏強度との関係」調査結果を示
したグラフであるが、この第４図からも、熱延仕上温度
が７００℃を下回って始めて高温巻取りによる軟化傾向
が更に大きくなり、軟化焼鈍材よりも降伏強度が低い優
れた冷延性を示すチタン熱延板の得られることが分かる
。Furthermore, Fig. 4 shows the same 25 mm J yen JIS Class 2 titanium forged material as the results shown in Figs. This is a graph showing the results of an investigation on the relationship between finishing temperature and yield strength for a hot-rolled plate that has been hot-rolled to a finished plate thickness of 3 degrees under the condition of It can be seen that the softening tendency due to high-temperature coiling becomes even greater when the rolling finishing temperature is lower than 700° C., and a titanium hot-rolled sheet exhibiting excellent cold-rollability and yield strength lower than that of a softened annealed material can be obtained.
そして、上述のような“熱延低温仕上”と“高温巻取り
”とを組み合わせることにより熱延チタン板に一層著し
い軟化現象が認められるのは、熱延時に導入された加工
歪が巻取り時の再結晶を促進し、従来の焼鈍材における
値以下の降伏強度値をもたらしたものと推定される。The reason why a more remarkable softening phenomenon is observed in the hot-rolled titanium sheet by combining the above-mentioned "hot-rolling low-temperature finishing" and "high-temperature winding" is that the processing strain introduced during hot rolling is applied during winding. It is presumed that this promotes the recrystallization of the material, resulting in a yield strength value lower than that of conventional annealed materials.
続いて、この発明を実施例により比較例と対比しながら
具体的に説明する。Next, the present invention will be specifically explained using examples and comparing with comparative examples.
〈実施例〉
まず、厚さが２５０のＪＩＳ ２種相当の純チタンスラ
ブを準備し、これに第１表に示すような各種条件の熱間
圧延を施して４Ｒ厚のチタン熱延板を得た後、比較例の
一部を除いては焼鈍を施すことなく酸洗及び０．５ｔｓ
厚までの冷間圧延を行った。<Example> First, a pure titanium slab with a thickness of 250 and equivalent to JIS Class 2 was prepared, and it was hot-rolled under various conditions as shown in Table 1 to obtain a 4R thick titanium hot-rolled plate. After that, except for some comparative examples, pickling and 0.5ts were performed without annealing.
Cold rolling was performed to a maximum thickness.
そして、この際、熱延終了後のチタン熱延板について圧
延方向の室温降伏強度を測定すると共に、“冷間圧延時
の焼付き発生の有無（目視判定）”並びに“４ ＋＋ｎ
厚から０．５ｍｍ厚にまで冷延するに要したパス回数”
を調査した。At this time, the room temperature yield strength in the rolling direction of the hot-rolled titanium sheet after hot rolling was measured, and the "presence or absence of seizure occurrence during cold rolling (visual judgment)" and "4++n
Number of passes required to cold-roll from 0.5mm thick to 0.5mm thick
investigated.
得られた結果を第１表に併せて示すが、その結果からは
次のことが明白である。The results obtained are also shown in Table 1, and the following is clear from the results.
■ チタン板の熱延に際してその巻取り温度が５５０℃
以上であれば、仕上温度が７００℃を越えており、かつ
加熱温度が多少変化したとしても、或いは熱延板焼鈍（
軟化焼鈍）を省略したとしても降伏強度＝３０〜３１ｋ
ｇｆ／■２程度の′チタン熱延板が安定して得られるが
〔本発明例５〜ｌＯ〕、これは軟化焼鈍材〔比較例１〜
２及び４〕と同等の値である。■ When hot rolling titanium sheets, the winding temperature is 550℃.
If it is above, the finishing temperature exceeds 700°C, and even if the heating temperature changes slightly, or the hot rolled sheet annealing (
Even if softening annealing) is omitted, yield strength = 30 to 31k
A hot-rolled titanium plate with a gf/■ of about 2 can be stably obtained [Inventive Examples 5 to 1O], but this is a soft annealed material [Comparative Examples 1 to
2 and 4].
そして、冷延性（焼付き発生状況）も良好であり、更に
４關厚から０．５ｍｍ厚まで冷間圧延するに要するパス
回数も７〜８回と軟化焼鈍材と同等である。The cold rollability (occurrence of seizure) is also good, and the number of passes required for cold rolling from 4 mm thickness to 0.5 mm thickness is 7 to 8 times, which is equivalent to the softened annealed material.
■ チタン板の熱延に際して、その仕上温度を７００℃
以下とし、かつ巻取り温度を５５０℃以上とした場合に
は降伏強度が２５〜３０ｋｇｆ／ｎ＋＋ｏ”となり、３
０ｋｇｆ／ｍｍ”以下の低降伏強度を示すチタン熱延板
が安定して得られるが〔本発明例１１−１５３、これは
焼鈍材よりも柔らかい値であり、４龍厚から０．５ｆｉ
厚まで冷間圧延するに要するパス回数も５〜６回と少な
くなっている。つまり、仕上温度を７００℃以下にする
と共に巻取り温度を５５０℃以上とした場合には、熱延
板の焼鈍の省略による有利さに加えて冷延バス回数の低
減までも図ることが出来る。■ When hot rolling titanium sheets, the finishing temperature is set at 700℃.
If the temperature is below and the winding temperature is 550℃ or higher, the yield strength will be 25 to 30 kgf/n++o'', and 3
A titanium hot-rolled sheet exhibiting a low yield strength of 0 kgf/mm" or less can be stably obtained [Inventive Example 11-153, this is a softer value than the annealed material, and the thickness is 0.5 fi from 4.
The number of passes required for cold rolling to a thickness is also reduced to 5 to 6 times. That is, when the finishing temperature is set to 700° C. or lower and the coiling temperature is set to 550° C. or higher, in addition to the advantage of omitting annealing of the hot-rolled sheet, it is also possible to reduce the number of cold rolling baths.
■ 比較例３は、従来条件で熱延を行うと共に熱延板焼
鈍を省略した場合の例であるが、この場合には得られる
チタン熱延板の降伏強度が極めて高くなり、冷延時に焼
付きが発生したり、冷延パス回数が１０〜１１回と多く
なる等の不都合を来たす。■ Comparative Example 3 is an example in which hot rolling was carried out under conventional conditions and hot rolled sheet annealing was omitted. In this case, the yield strength of the resulting hot rolled titanium sheet was extremely high, and This causes inconveniences such as sticking or an increase in the number of cold rolling passes of 10 to 11 times.
■ この発明の条件通りに製造された熱延コイルを、工
程の都合で焼鈍処理に付したとしても性能的に何らの問
題も生じない。(2) Even if a hot-rolled coil manufactured according to the conditions of the present invention is subjected to annealing treatment for convenience of the process, no problem will arise in terms of performance.
以上に示した結果は、最も一最的なＪＩＳ ２種のチタ
ン材についてのものであるが、これとは別に、ＪＩＳ
１種並びにＪＩＳ ３種のチタン材についても、また純
チタン以外のチタン合金や、ジルコニウム或いはジルコ
ニウム合金の連続熱間圧延においても再結晶組織の制御
により同様の結果が得られるとの十分な確認もなされた
。The results shown above are for the most optimal JIS Type 2 titanium material, but apart from this, JIS
It has been sufficiently confirmed that similar results can be obtained by controlling the recrystallized structure for Type 1 and JIS Type 3 titanium materials, as well as for continuous hot rolling of titanium alloys other than pure titanium, zirconium, or zirconium alloys. It was done.
更に、この発明の方法によって得られる熱延板は、冷延
の途中に中間焼鈍を入れる２回冷延工程に付しても何ら
変わりなく十分に優れた性能を発揮することも勿論であ
る。Furthermore, it goes without saying that the hot-rolled sheet obtained by the method of the present invention exhibits sufficiently excellent performance without any change even if it is subjected to a two-time cold rolling process in which intermediate annealing is performed in the middle of cold rolling.
〈効果の総括〉
上述のように、この発明によれば、極めて良好な冷延特
性を示すチタン熱延板を、作業能率の低下やコストアッ
プにつながる軟化焼鈍を施すことなく、しかも他の緒特
性に悪影響を及ぼすこともなく安定生産することが可能
となり、チタン冷延板適用分野の一層の拡大に寄与し得
るなど、産業上極めて有用な効果がもたらされるのであ
る。<Summary of Effects> As described above, according to the present invention, titanium hot-rolled sheets exhibiting extremely good cold-rolling properties can be produced without undergoing softening annealing, which reduces work efficiency and increases costs. This makes it possible to produce stably without adversely affecting the properties, and contributes to the further expansion of the field of application of cold-rolled titanium sheets, bringing extremely useful effects industrially.
第１図は、チタン熱延板における「熱延巻取り温度と降
伏強度との関係」の調査結果を示したグラフ、
第２図は、チタン熱延板の“軟化焼鈍処理材′と“熱延
ままの材料”とについて４００″Ｃ巻取り材及び６００
″Ｃ巻取り材のミクロ組織を比較した金属顕微鏡組織写
真図、
第３図は、チタン熱延板における「熱延巻取り温度と降
伏強度との関係」の調査結果を示したグラフ、
第４図は、熱延のままのチタン熱延板の［仕上温度と降
伏強度との関係」調査結果を示したグラフである。Figure 1 is a graph showing the results of an investigation on the relationship between hot-rolled coiling temperature and yield strength in hot-rolled titanium sheets. 400″C rolled material and 600″ material as rolled
``A metallographic microstructure photograph comparing the microstructure of C-rolled material. Figure 3 is a graph showing the investigation results of ``the relationship between hot-rolled coiling temperature and yield strength'' in titanium hot-rolled sheets. The figure is a graph showing the results of an investigation on the relationship between finishing temperature and yield strength of hot-rolled titanium sheets as hot-rolled.
Claims (2)
、熱延ストリップを５５０℃以上の高温でコイルに巻き
取ることを特徴とする、冷延性に優れたチタン板の製造
方法。(1) A method for producing a titanium plate with excellent cold rollability, which comprises winding a hot-rolled strip into a coil at a high temperature of 550° C. or higher when producing the hot-rolled titanium plate using a continuous hot rolling mill.
、熱間圧延を７００℃以下の温度で終了すると共に、熱
延ストリップを５５０℃以上の高温でコイルに巻き取る
ことを特徴とする、冷延性に優れたチタン板の製造方法
。(2) When producing a hot-rolled titanium plate using a continuous hot rolling mill, hot rolling is completed at a temperature of 700°C or lower, and the hot-rolled strip is wound into a coil at a high temperature of 550°C or higher. A method for producing titanium plates with excellent cold rollability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26070286A JPS63114952A (en) | 1986-11-04 | 1986-11-04 | Manufacture of titanium sheet having superior cold rollability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26070286A JPS63114952A (en) | 1986-11-04 | 1986-11-04 | Manufacture of titanium sheet having superior cold rollability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63114952A true JPS63114952A (en) | 1988-05-19 |
Family
ID=17351584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26070286A Pending JPS63114952A (en) | 1986-11-04 | 1986-11-04 | Manufacture of titanium sheet having superior cold rollability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63114952A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016152678A1 (en) * | 2015-03-25 | 2016-09-29 | 株式会社神戸製鋼所 | Method for manufacturing rolled sheet for cold-rolling and method for manufacturing pure titanium sheet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429458A (en) * | 1977-08-08 | 1979-03-05 | Huret Roger Henri | Handle of controlling speed change of bicycle |
| JPS61157668A (en) * | 1984-12-29 | 1986-07-17 | Nippon Steel Corp | Manufacture of titanium hot rolled plate |
| JPS6283457A (en) * | 1985-10-09 | 1987-04-16 | Nippon Steel Corp | Manufacturing of titanium hot-rolled plate |
-
1986
- 1986-11-04 JP JP26070286A patent/JPS63114952A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429458A (en) * | 1977-08-08 | 1979-03-05 | Huret Roger Henri | Handle of controlling speed change of bicycle |
| JPS61157668A (en) * | 1984-12-29 | 1986-07-17 | Nippon Steel Corp | Manufacture of titanium hot rolled plate |
| JPS6283457A (en) * | 1985-10-09 | 1987-04-16 | Nippon Steel Corp | Manufacturing of titanium hot-rolled plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016152678A1 (en) * | 2015-03-25 | 2016-09-29 | 株式会社神戸製鋼所 | Method for manufacturing rolled sheet for cold-rolling and method for manufacturing pure titanium sheet |
| JP2016183369A (en) * | 2015-03-25 | 2016-10-20 | 株式会社神戸製鋼所 | Method for producing rolled sheet for cold rolling and method for producing pure titanium sheet |
| RU2682737C1 (en) * | 2015-03-25 | 2019-03-21 | Кабусики Кайся Кобе Сейко Се (Кобе Стил, Лтд.) | Method of manufacturing a rolled sheet for cold rolling and a method for obtaining a sheet from pure titanium |
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