JPS63303043A - Manufacture of angle bar made of ti alloy - Google Patents
Manufacture of angle bar made of ti alloyInfo
- Publication number
- JPS63303043A JPS63303043A JP13670387A JP13670387A JPS63303043A JP S63303043 A JPS63303043 A JP S63303043A JP 13670387 A JP13670387 A JP 13670387A JP 13670387 A JP13670387 A JP 13670387A JP S63303043 A JPS63303043 A JP S63303043A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- rolling
- angle bar
- center
- shaped
- 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
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 18
- 238000005098 hot rolling Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000000047 product Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002244 precipitate Substances 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]
本発明はTi合金の圧延加工方法に係り、詳しくは熱間
孔型圧延加工によりTi合金製の山形材を製造する方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for rolling a Ti alloy, and more particularly to a method for manufacturing an angle-shaped member made of a Ti alloy by hot hole rolling.
[従来の技術]
Ti合金、特にα+β型Ti合金は比強度(引張強度/
比重)が高く耐食性に優れているので、航空機材や宇宙
開発機材等に使用されている。しかし、このα+β型T
i合金を含めてTi合金は一般に変形抵抗が高く加工性
が極めて悪いという欠点がある上、加工後の製品に必要
な延性を付与するためには一定の組織としなければなら
ない。[Prior art] Ti alloys, especially α+β type Ti alloys, have a specific strength (tensile strength/
Because it has a high specific gravity) and excellent corrosion resistance, it is used in aircraft materials, space development equipment, etc. However, this α+β type T
Ti alloys, including i-alloys, generally have the disadvantage of high deformation resistance and extremely poor workability, and in addition, they must have a certain structure in order to impart the necessary ductility to the processed product.
すなわち、α+β型Ti合金の代表例であるTi−6A
I−4V合金では約1000℃以下の温度ではα+βの
2相から成り、それ以上ではβ単相となる。高温で加工
を行なうほうが変形抵抗が少ないということから、β相
領域で熱間加工を行うことが好ましいが、1100℃以
上のβ相単相領域における圧延または加熱では温度が高
すぎてβ結晶粒の粗大化が起こり、この粗大粒に焼なま
しまたは固溶化熱処理を施しても粗大針状結晶が残留し
延性の低下をもたらす、α+β領域で加工を行えば焼な
ましまたは固溶化熱処理と時効処理により等軸α+β組
織を得ることが出来るが、α+β領域での加工は変形抵
抗が大きく、また、圧延中における温度降下により仕上
圧延温度領域ではα相が析出し過ぎて延びが少なくなる
。That is, Ti-6A is a typical example of α+β type Ti alloy.
The I-4V alloy consists of two phases, α+β, at temperatures below about 1000°C, and becomes a single β phase at temperatures above that. Since deformation resistance is lower when processing is carried out at high temperatures, it is preferable to carry out hot working in the β-phase region. However, rolling or heating in the β-phase single-phase region at 1100°C or higher causes the temperature to be too high and the β crystal grains Coarsening occurs, and even if these coarse grains are subjected to annealing or solution heat treatment, coarse acicular crystals remain, resulting in a decrease in ductility. Although it is possible to obtain an equiaxed α+β structure through processing, processing in the α+β region has high deformation resistance, and due to temperature drop during rolling, too much α phase precipitates in the finish rolling temperature region, resulting in less elongation.
このようなことから、Ti合金製の形材を圧延で製造す
ることは従来行なわれておらず、またTi合金は冷間成
形性が悪く、折り曲げによって成形することは困難であ
った。そこで押し出し成形によって製造していたが、こ
の押し出し成形品は肉厚に制約があり肉厚の薄いものが
製造できず、そのため従来からTi合金製の形材を圧延
で製造する方法の出現が望まれていた。For these reasons, it has not been conventionally possible to manufacture Ti alloy shapes by rolling, and Ti alloys have poor cold formability, making it difficult to form them by bending. Therefore, extrusion molded products were manufactured by extrusion molding, but there were restrictions on the wall thickness of extrusion molded products, and thin walled products could not be manufactured.Therefore, it was hoped that a method of manufacturing Ti alloy shapes by rolling would emerge. It was rare.
し発明が解決しようとする問題点]
本発明はTi合金製の形材の前記のごとき問題点に鑑み
てなされたもので、Ti合金製の所望の肉厚の山形材を
圧延により製造することのできる製造方法を提供するこ
とを目的とする。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems of the Ti alloy shaped material, and it is a method of manufacturing an angle shaped material of a desired wall thickness made of a Ti alloy by rolling. The purpose is to provide a manufacturing method that allows for
L問題点を解決するための手段〕
本発明のTi合金製山形材の製造方法は、Ti合金から
なる圧延素材を1000〜1100℃に加熱する工程と
、中央に直角V字形の孔型を有する下ロールと中央に直
角八字形の凸条を有する上ロールからなる熱間圧延ロー
ルにより前記圧延素材を圧延する工程とからなり、一対
のフランジ部が互いに直角になるように山形材を形成す
ることを要旨とする。Means for Solving Problem L] The method for manufacturing a Ti alloy angle-shaped material of the present invention includes a step of heating a rolled material made of a Ti alloy to 1000 to 1100°C, and a hole having a right-angled V-shape in the center. A step of rolling the rolled material with a hot rolling roll consisting of a lower roll and an upper roll having a right-angled 8-shaped protrusion in the center, and forming an angle-shaped material so that the pair of flange parts are at right angles to each other. The gist is:
[作用]
圧延素材は先ず1000〜1100℃に加熱される。圧
延素材の加熱温度を前記温度にしたのは、1000℃以
下であると変形抵抗が大きく圧延加工が困難であると同
時にまた圧延製品の焼なまし後の延びが低くなるためで
あり、1100℃を越えると針状β相の残留により延性
が低下するからである。[Function] The rolled material is first heated to 1000 to 1100°C. The reason why the heating temperature of the rolled material was set to the above temperature is that if the temperature is 1000°C or less, the deformation resistance is large and rolling is difficult, and at the same time, the elongation of the rolled product after annealing becomes low. This is because if the value exceeds 100%, the ductility decreases due to the residual acicular β phase.
次に圧延素材は中央に直角V字形の孔型を有する下ロー
ルと中央に半円形の凸条を有する上ロールよりなる熱間
圧延ロールにより圧延され製品寸法と同一の板厚を有す
る一対のフランジ部に圧延される。この熱間圧延により
圧延素材は一対のフランジ部が互いに直角になるように
山形材として形成される。Next, the rolled material is rolled by hot rolling rolls consisting of a lower roll with a right-angled V-shaped hole in the center and an upper roll with a semicircular protrusion in the center, and is rolled into a pair of flanges having the same thickness as the product dimensions. rolled into parts. By this hot rolling, the rolled material is formed into an angle-shaped material such that the pair of flanges are perpendicular to each other.
[実施例]
本発明の好適な一実施例について以下図面に従って説明
する。[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings.
第1図に熱間圧延ロール10の側面図を示す。FIG. 1 shows a side view of the hot rolling roll 10.
熱間圧延上ロール12は図示しない駆動装置により駆動
されるが、中央に直角V字形の孔型14が設けられてい
る。熱同圧延下ロール16の中央には、上ロール12の
孔型14に対向する位置に、八字形の凸条18が設けら
れている。The hot rolling upper roll 12 is driven by a drive device (not shown), and is provided with a right-angled V-shaped hole 14 in the center. At the center of the hot iso-rolling lower roll 16, an eight-shaped protrusion 18 is provided at a position facing the hole 14 of the upper roll 12.
はじめにl!711m50請−角、長さ1000輪−の
]゛i合金ビレットを1050℃に加熱し、ついでこの
ビレットを図示しない圧延ロールで順次圧延し第1図に
示す最終熱間圧延ロール10で圧延し第2図に示す31
厚さの一対のフランジ部が直角になる山形材20を成形
した。なお、得られた山形材20のm微鏡組織を調べた
ところ、等軸α+β組織であって!を要な延性が得られ
ていることが明らかとなった。Introductionl! An alloy billet of 711 m and 50 bends and 1000 wheels in length was heated to 1050°C, and then this billet was successively rolled with rolling rolls (not shown) and then rolled with the final hot rolling roll 10 shown in FIG. 31 shown in Figure 2
An angle-shaped member 20 was formed so that a pair of thick flange portions were at right angles. Furthermore, when we examined the m-microscopic structure of the obtained chevron material 20, we found that it was an equiaxed α+β structure! It became clear that the necessary ductility was obtained.
[発明の効果]
本発明のTiき金製山形材の製造方法は以上説明したよ
うに、Ti合金からなる圧延素材を1000〜1100
℃に加熱して熱間圧延加工を施すものであって、変形抵
抗の少ない高温であってしかも等軸α十β組織が得られ
る温度に加熱して熱間圧延を行うものであって、得られ
た製品に必要な延性を付与することができる。また、熱
間圧延は中央に直角V字形の孔型を有する下ロールと中
央に直角八字形の凸条を有する上ロールよりなる熱間圧
延ロールにより、一対のフランジ部が互いに直角になる
ように山形材を形成するものであって、従来方法では得
られなかった圧延によるTi合金製の山形材を製造する
ことができる。[Effects of the Invention] As explained above, the method for manufacturing the Ti-metal angle shape material of the present invention involves rolling a rolled material made of Ti alloy to
℃ to perform hot rolling processing, and hot rolling is carried out by heating to a high temperature with low deformation resistance and at a temperature at which an equiaxed α-β structure can be obtained. The necessary ductility can be imparted to the finished product. In addition, hot rolling is performed using hot rolling rolls consisting of a lower roll having a right-angled V-shaped hole in the center and an upper roll having a right-angled eight-shaped convex strip in the center, so that the pair of flanges are at right angles to each other. This method forms an angle-shaped member, and it is possible to produce an angle-shaped member made of Ti alloy by rolling, which could not be obtained by conventional methods.
第1図は熱間圧延ロールの側面図5第2図は山形材の側
面図、
10・・・熱間圧延ロール、12・・・熱間圧延上ロー
ル、14・・・熱間圧延上ロールの孔型、16・・・熱
間圧延下ロール、18・・・熱間圧延下ロールの凸条、
20・・・山形材。Fig. 1 is a side view of the hot rolling roll; Fig. 2 is a side view of the angle-shaped material; 10... hot rolling roll; 12... hot rolling upper roll; 14... hot rolling upper roll. 16... Hot rolling lower roll, 18... Convex strip of hot rolling lower roll,
20... Yamagata lumber.
Claims (1)
℃に加熱する工程と、中央に直角V字形の孔型を有する
下ロールと中央に直角Λ字形の凸条を有する上ロールか
らなる熱間圧延ロールにより前記圧延素材を圧延する工
程とからなり、一対のフランジ部が互いに直角になるよ
うに山形材を形成することを特徴とするTi合金製山形
材の製造方法。(1) Rolled material made of Ti alloy with 1000 to 1100
℃, and rolling the rolled material with a hot rolling roll consisting of a lower roll having a right-angled V-shaped hole in the center and an upper roll having a right-angled Λ-shaped convex strip in the center, A method for manufacturing a Ti alloy angle-shaped member, characterized in that the angle-shaped member is formed so that a pair of flange portions are at right angles to each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13670387A JPS63303043A (en) | 1987-05-30 | 1987-05-30 | Manufacture of angle bar made of ti alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13670387A JPS63303043A (en) | 1987-05-30 | 1987-05-30 | Manufacture of angle bar made of ti alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63303043A true JPS63303043A (en) | 1988-12-09 |
Family
ID=15181507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13670387A Pending JPS63303043A (en) | 1987-05-30 | 1987-05-30 | Manufacture of angle bar made of ti alloy |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63303043A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5825424A (en) * | 1981-08-05 | 1983-02-15 | Sumitomo Metal Ind Ltd | Manufacture of titanium alloy rolling material having satisfactory texture |
JPS6012203A (en) * | 1983-06-30 | 1985-01-22 | Nippon Stainless Steel Co Ltd | Manufacture of chevron-shaped material of titanium or titanium alloy |
JPS6144166A (en) * | 1984-08-09 | 1986-03-03 | Nippon Mining Co Ltd | Manufacture of titanium alloy plate |
-
1987
- 1987-05-30 JP JP13670387A patent/JPS63303043A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5825424A (en) * | 1981-08-05 | 1983-02-15 | Sumitomo Metal Ind Ltd | Manufacture of titanium alloy rolling material having satisfactory texture |
JPS6012203A (en) * | 1983-06-30 | 1985-01-22 | Nippon Stainless Steel Co Ltd | Manufacture of chevron-shaped material of titanium or titanium alloy |
JPS6144166A (en) * | 1984-08-09 | 1986-03-03 | Nippon Mining Co Ltd | Manufacture of titanium alloy plate |
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