JPH02127916A - Manufacture of 7000 group al alloy extruded material suppressing surface recrystallization - Google Patents
Manufacture of 7000 group al alloy extruded material suppressing surface recrystallizationInfo
- Publication number
- JPH02127916A JPH02127916A JP27989588A JP27989588A JPH02127916A JP H02127916 A JPH02127916 A JP H02127916A JP 27989588 A JP27989588 A JP 27989588A JP 27989588 A JP27989588 A JP 27989588A JP H02127916 A JPH02127916 A JP H02127916A
- Authority
- JP
- Japan
- Prior art keywords
- extruded material
- alloy
- die
- liquid nitrogen
- extruding
- 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
- 239000000463 material Substances 0.000 title claims abstract description 38
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 11
- 238000001953 recrystallisation Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000001125 extrusion Methods 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 36
- 239000007788 liquid Substances 0.000 abstract description 19
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 18
- 238000005452 bending Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract 1
- YPHMISFOHDHNIV-FSZOTQKASA-N cycloheximide Chemical compound C1[C@@H](C)C[C@H](C)C(=O)[C@@H]1[C@H](O)CC1CC(=O)NC(=O)C1 YPHMISFOHDHNIV-FSZOTQKASA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002932 luster Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、例えばオートバイ等のフレームやりャホー
ク等に使用される７０００系Ａρ合金押出材の製造方法
、特に表面再結晶を抑制した７０００系Ａρ合金押出材
の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing 7000 series Aρ alloy extruded material used for, for example, frames of motorcycles, etc. It relates to a method of manufacturing materials.
従来の技術
オートバイ等のフレームやりャホーク等には、軽量かつ
強度に優れ、しかも溶接性に優れた７０００系ＡＱ合金
押出材が広く用いられている。BACKGROUND OF THE INVENTION 7000 series AQ alloy extruded materials, which are lightweight, strong, and have excellent weldability, are widely used for frames of motorcycles and the like.
かかる押出材は、所定温度に加熱したビレットを押出用
ダイスより所定断面形状に押出すことによって製造され
る。Such an extruded material is manufactured by extruding a billet heated to a predetermined temperature into a predetermined cross-sectional shape from an extrusion die.
発明が解決しようとする課題
しかしながら、かかる７０００系Ａｌ合金にあっては、
これを押出した場合、該押出材の表面に再結晶層が生じ
ることより、その後曲げ加工を施した際に表面がゆず肌
（オレンジピール）となったり、あるいは化研アルマイ
ト処理を施した際にアルマイト模様が現出するという問
題があることが従来より認識されている。このため、再
結晶層の形成を抑制するために低温低速押出法を採用し
たりするなど種々の工夫がなされているが、必ずしも所
期するほどの効果を挙げ得るものではなかった。Problems to be Solved by the Invention However, in such a 7000 series Al alloy,
When this is extruded, a recrystallized layer is formed on the surface of the extruded material, which may cause the surface to become orange peel when bending or when subjected to Kaken alumite treatment. It has been recognized that there is a problem in that an alumite pattern appears. For this reason, various efforts have been made to suppress the formation of the recrystallized layer, such as employing a low-temperature, low-speed extrusion method, but these have not always been as effective as expected.
この発明は、上述の問題点に鑑みてなされたもので、７
０００系Ａρ合金であって、押出後に発生する表面再結
晶の成長を抑制し、曲げ加工時のオレンジビールの発生
や、化研アルマイト処理時のアルマイト模様の現出を防
止し得たアルミニウム合金押出材の製造方法を提供する
ことを目的とする。This invention was made in view of the above-mentioned problems.
An extruded aluminum alloy that is a 000 series Aρ alloy that suppresses the growth of surface recrystallization that occurs after extrusion, and prevents the generation of orange beer during bending and the appearance of an alumite pattern during Kaken alumite treatment. The purpose is to provide a method for manufacturing materials.
課題を解決するための手段
上記目的において、この発明は、７０００系Ａρ合金を
押出用ダイスより押出しつつ、該押出材の表面に、上記
ダイスのベアリング部通過後所定時間内に液体窒素を所
定量の割合で吹き付けることによって該押出材を急速冷
却せしめることにより、表面再結晶の成長を抑制し、再
結晶層の厚さを均一でしかも薄くし得ることを見出し、
この発明を完成し得たものである。Means for Solving the Problems To achieve the above object, the present invention provides a method for extruding a 7000 series Aρ alloy from an extrusion die, and applying a predetermined amount of liquid nitrogen to the surface of the extruded material within a predetermined time after passing through the bearing section of the die. It has been discovered that by rapidly cooling the extruded material by spraying at a rate of
This invention has been completed.
即ち、この発明は、７０００系Ａｌ合金を押出用ダイス
より押しつつ、該押出材の表面に、上記ダイスのベアリ
ング部通過後５秒以内に液体窒素（ＬｊｑＮ２）を０．
２〜０． ５ＮｇＬｉｑＮ２／に９Ａｌ合金の割合で吹
き付けることによって該押出材を急速冷却せしめること
を特徴とする、表面再結晶を抑制した７０００系ＡＱ合
金押出材の製造方法を要旨とするものである。That is, in the present invention, while pressing a 7000 series Al alloy through an extrusion die, 0.00% of liquid nitrogen (LjqN2) is applied to the surface of the extruded material within 5 seconds after passing through the bearing section of the die.
2-0. The gist of this invention is a method for producing a 7000 series AQ alloy extruded material with suppressed surface recrystallization, characterized by rapidly cooling the extruded material by spraying 5NgLiqN2/9Al alloy at a ratio of 9Al alloy.
オートバイフレーム等に好適に用いられるＡ７Ｎ０１、
Ａ７００３合金等の７０００系Ａρ合金を押出した場合
、押出材の表面温度が高い状態で押出されていることよ
り、押出材表面に再結晶が発生し、しかもそれが成長す
ることより再結晶層の厚さが厚くなる。このため曲げ加
工時にオレンジピールが発生する。一方、ダイス通過時
に押出材の表面温度が高くならないような条件を設定し
て押出した場合、表面を繊維組織とすることができるが
、ダイスベアリング部の焼き付は等により局部的に再結
晶が発生する。このため化研アルマイト処理時に繊維組
織部分が光沢を有せず、再結晶層部分が光沢を有するも
のとなり、その結果、アルマイト模様（色むら）が生ず
るものとなる。A7N01, suitable for use in motorcycle frames, etc.
When a 7000 series Aρ alloy such as A7003 alloy is extruded, recrystallization occurs on the surface of the extruded material because the surface temperature of the extruded material is high, and as the recrystallization grows, the recrystallized layer Thickness increases. For this reason, orange peel occurs during bending. On the other hand, if the extruded material is extruded under conditions such that the surface temperature does not rise when passing through the die, the surface can have a fibrous structure, but the die bearing part may be seize up and recrystallize locally. Occur. For this reason, during Kaken alumite treatment, the fiber structure portion does not have luster, and the recrystallized layer portion has luster, resulting in an alumite pattern (uneven color).
かかる不都合は、押出材の表面再結晶の成長を抑制し、
厚さが均一でしかも５０μｍ程度以下の薄い再結晶層と
することにより解消される。Such disadvantages suppress the growth of surface recrystallization of the extruded material,
This problem can be solved by forming a recrystallized layer with a uniform thickness and a thin recrystallization layer of about 50 μm or less.
このため、本発明においては、押出直後に押出材の表面
に液体窒素を吹付けることにより急速に冷却せしめるも
のとする。Therefore, in the present invention, liquid nitrogen is sprayed onto the surface of the extruded material immediately after extrusion to cool it rapidly.
上述の如く薄くてしかも均一な表面再結晶層とするため
には、押出材の押出直後の表面温度が４８０〜５２０℃
程度、特に好適には５００〜５１０℃程度となるように
急速冷却せしめることが必要であり、従って、液体窒素
の押出材表面への吹付けは次の条件に設定することが必
要である。In order to obtain a thin and uniform surface recrystallized layer as described above, the surface temperature of the extruded material immediately after extrusion must be 480 to 520°C.
It is necessary to rapidly cool the extruded material to a temperature of about 500 to 510 DEG C., and it is therefore necessary to set the following conditions for spraying liquid nitrogen onto the surface of the extruded material.
吹付はタイミングは、押出用ダイスのベアリング部通過
後５秒以内に行うものとする。それより遅れると表面再
結晶の成長が進んでしまい所期する再結晶抑制効果を得
ることができないからである。最も好適には、２秒以内
に吹付けるようにするのが良い。The timing of spraying shall be within 5 seconds after passing the bearing part of the extrusion die. This is because if the delay is longer than that, the growth of surface recrystallization will proceed, making it impossible to obtain the desired effect of suppressing recrystallization. Most preferably, the spraying is done within 2 seconds.
吹付は量は、０．２〜０． ５Ｎ９ＬｉｑＮ２／に’Ｊ
Ａｌ合金の範囲に設定するものとする。即ち、Ａｌ合金
Ｉ Ｎｇに対して液体窒素を０．２〜０．５Ｋｙの割合
に設定する。下限値以下であると十分な冷却効果が得ら
れず、従って表面再結晶を十分に抑制することができな
いからであり、逆に上限値を越えてもそれ以上の表面再
結晶の抑制効果が得られないからである。最も好適には
、０、 ３５ＫｇＬｉｑＮ２／に！ＪＡρ前後に設定す
るのが良い。The amount of spraying is 0.2 to 0. 5N9LiqN2/ni'J
It shall be set within the range of Al alloy. That is, the ratio of liquid nitrogen to Al alloy I Ng is set to 0.2 to 0.5 Ky. This is because if it is below the lower limit, a sufficient cooling effect cannot be obtained and therefore surface recrystallization cannot be sufficiently suppressed.On the other hand, even if it exceeds the upper limit, no further effect of suppressing surface recrystallization can be obtained. This is because it cannot be done. Most preferably 0.35KgLiqN2/! It is best to set it around JAρ.
上記液体窒素の吹付けは、超急速冷却を実現するために
気化状態としてではなく液体状態のままで直接吹付ける
ことが必要である。In order to achieve ultra-rapid cooling, it is necessary to spray the liquid nitrogen directly in the liquid state rather than in the vaporized state.
上述のように吹付はタイミングおよび吹付は量を設定す
ることにより、常法に従って押出したプラテン出口での
押出材の表面温度は４８０〜５２０℃程度となり、もっ
て薄くしかも均一な再結晶層を形成することができる。As mentioned above, by setting the timing and amount of spraying, the surface temperature of the extruded material at the outlet of the platen extruded according to the conventional method will be about 480 to 520°C, thereby forming a thin and uniform recrystallized layer. be able to.
更に、表面再結晶をより一層抑制する目的で、押出用ダ
イスとして、ベアリング部の入口側周縁に押出断面積が
連続的に減少する傾斜面を有するものを用いても良い。Furthermore, for the purpose of further suppressing surface recrystallization, an extrusion die having an inclined surface whose extrusion cross-sectional area continuously decreases at the inlet side periphery of the bearing portion may be used.
発明の効果
この発明は、上述の次第で、７０００系Ａρ合金を押出
用ダイスより押出しつつ、該押出材の表面に、上記ダイ
スのベアリング部通過後５秒以内に液体窒素（ＬｉｑＮ
２）を０．２〜０，５ＮｇＬｉｑＮ＋ ／に’ＪＡｌ合
金の割合で吹き付けることによって該押出材を急速冷却
せしめるものであるから、押出材の表面の再結晶層の厚
さを薄くしかも均一なものとすることができる。従って
、押出成形後に曲げ加工を施した場合に表面がゆず肌（
オレンジピール）となったり、あるいは化研アルマイト
処理を施した場合にアルマイト模様が現出するような不
都合を回避し得、ひいては外観体裁の良好な奇麗な製品
を得ることができる。Effects of the Invention As described above, the present invention, while extruding a 7000 series Aρ alloy through an extrusion die, injects liquid nitrogen (LiqN) onto the surface of the extruded material within 5 seconds after passing through the bearing section of the die.
2) is sprayed at a ratio of 0.2 to 0.5 NgLiqN+/'JAl alloy to rapidly cool the extruded material, so the thickness of the recrystallized layer on the surface of the extruded material is thin and uniform. It can be done. Therefore, if the bending process is performed after extrusion, the surface will have an orange skin (
It is possible to avoid problems such as orange peel) or the appearance of an alumite pattern when Kaken alumite treatment is applied, and as a result, it is possible to obtain a beautiful product with a good appearance.
実施例 次にこの発明の実施例を示す。Example Next, examples of this invention will be shown.
第１表に示すような組成のアルミニウム合金ビレットを
、第１図に示す押出用ダイス（１）を用いて押出しつつ
、該押出材（Ａ）の表面に液体窒素（Ｂ）を吹付けるこ
とによって該押出材（Ａ）を急速冷却せしめた。By extruding an aluminum alloy billet having the composition shown in Table 1 using the extrusion die (1) shown in Fig. 1, and spraying liquid nitrogen (B) onto the surface of the extruded material (A), The extruded material (A) was rapidly cooled.
押出しは、コンテナ温度４５０℃、ビレット温度４８０
℃、押出速度（製品）６０００＃／分の条件下で行った
。Extrusion is carried out at a container temperature of 450°C and a billet temperature of 480°C.
The extrusion rate (product) was 6000 #/min.
液体窒素（Ｂ）の吹付けは、第１図および第２図に示す
ように、ダイス（１）とその出側に配設されたボルスタ
−（２）との間に、ボルスタ−接合面側に液体窒素送給
用溝（３ａ）の形成されたスペーサー（３）を、該溝（
３ａ）に対応した形状の液体窒素送給管（４）を嵌め合
わせた状態で介在せしめ、該送給管（４）から液体窒素
（Ｂ）を送給することにより行った。As shown in Figs. 1 and 2, liquid nitrogen (B) is sprayed between the die (1) and the bolster (2) disposed on the exit side thereof. Place the spacer (3) in which the liquid nitrogen supply groove (3a) is formed into the groove (3a).
A liquid nitrogen feed pipe (4) having a shape corresponding to 3a) was interposed in a fitted state, and liquid nitrogen (B) was fed from the feed pipe (4).
なお、第１図中、（５）は断熱材である。In addition, in FIG. 1, (5) is a heat insulating material.
液体窒素（Ｂ）の吹付はタイミングは、ダイス（１）の
ベアリング部（ｌａ）通過後１．０秒程度であり、吹付
は量は、０． ３５＊ｙｔ、ｔｑＮ２ ／ＫｙＡρ合金
に設定した。The timing of spraying liquid nitrogen (B) is about 1.0 seconds after passing through the bearing part (la) of the die (1), and the spraying amount is 0.0 seconds. 35*yt, tqN2/KyAρ alloy.
かかる条件で押出された押出材（Ａ）の表面の温度はプ
ラテン出口で５１０℃であった。The surface temperature of the extruded material (A) extruded under these conditions was 510° C. at the outlet of the platen.
上記により得られた押出材（Ａ）の表面再結晶の厚さを
各部で調べたところ、いずれも３０〜５０μｍ程度であ
った。When the thickness of the surface recrystallization of each part of the extruded material (A) obtained above was examined, it was found to be about 30 to 50 μm in all cases.
この結果かられかるように、この発明によれば、表面再
結晶層が薄くしかも均一な７０００系Ａρ合金押出材を
提供しうろことを確認し得た。As can be seen from the results, it was confirmed that according to the present invention, it was possible to provide a 7000 series Aρ alloy extruded material with a thin and uniform surface recrystallized layer.
第１図はこの発明に基づいて押出材を製造している状態
を示す断面図、第２図は液体窒素を送給するための、ス
ペーサーおよび液体窒素送給管を分離した状態を示す斜
視図である。
（１）・・・押出用ダイス、（ｌａ）・・・ベアリング
部、（Ａ）・・・押出材、（Ｂ）・・・液体窒素。
以上Fig. 1 is a sectional view showing a state in which an extruded material is manufactured based on the present invention, and Fig. 2 is a perspective view showing a separated state of a spacer and a liquid nitrogen feed pipe for feeding liquid nitrogen. It is. (1)...Extrusion die, (la)...Bearing part, (A)...Extrusion material, (B)...Liquid nitrogen. that's all
Claims (1)
通過後５秒以内に液体窒素（ＬｉｑＮ＿２）を０．２〜
０．５ＫｇＬｉｑＮ＿２／ＫｇＡｌ合金の割合で吹き付
けることによって該押出材を急速冷却せしめることを特
徴とする、表面再結晶を抑制した７０００系Ａｌ合金押
出材の製造方法。[Claims] While pressing a 7000 series Al alloy through an extrusion die, 0.2 to 0.2 to
A method for producing a 7000 series Al alloy extruded material with suppressed surface recrystallization, characterized in that the extruded material is rapidly cooled by spraying at a ratio of 0.5 KgLiqN_2/KgAl alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27989588A JPH02127916A (en) | 1988-11-04 | 1988-11-04 | Manufacture of 7000 group al alloy extruded material suppressing surface recrystallization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27989588A JPH02127916A (en) | 1988-11-04 | 1988-11-04 | Manufacture of 7000 group al alloy extruded material suppressing surface recrystallization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02127916A true JPH02127916A (en) | 1990-05-16 |
| JPH0367766B2 JPH0367766B2 (en) | 1991-10-24 |
Family
ID=17617422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27989588A Granted JPH02127916A (en) | 1988-11-04 | 1988-11-04 | Manufacture of 7000 group al alloy extruded material suppressing surface recrystallization |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02127916A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949348A1 (en) * | 1998-04-09 | 1999-10-13 | Alusuisse Technology & Management AG | Process for controlled cooling of aluminium alloy strips and profiles |
| CN100346892C (en) * | 2005-01-25 | 2007-11-07 | 广东兴发集团有限公司 | Fast 7075 aluminium alloy shape extruding process |
| CN103643181A (en) * | 2013-11-29 | 2014-03-19 | 福建省南平铝业有限公司 | Online forced-cooling and quenching device of aluminum alloy extrusion material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212650A (en) * | 1975-07-22 | 1977-01-31 | Yamato Kogyo Kk | Method of producing outer end with edge of control cable |
-
1988
- 1988-11-04 JP JP27989588A patent/JPH02127916A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212650A (en) * | 1975-07-22 | 1977-01-31 | Yamato Kogyo Kk | Method of producing outer end with edge of control cable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949348A1 (en) * | 1998-04-09 | 1999-10-13 | Alusuisse Technology & Management AG | Process for controlled cooling of aluminium alloy strips and profiles |
| CN100346892C (en) * | 2005-01-25 | 2007-11-07 | 广东兴发集团有限公司 | Fast 7075 aluminium alloy shape extruding process |
| CN103643181A (en) * | 2013-11-29 | 2014-03-19 | 福建省南平铝业有限公司 | Online forced-cooling and quenching device of aluminum alloy extrusion material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0367766B2 (en) | 1991-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100217484B1 (en) | Sputtering target with ultra-fine, orient grains and method of making same | |
| DE1941491A1 (en) | Process for the manufacture of fiber-reinforced composite fabrics | |
| DE2901028A1 (en) | METHOD FOR PRODUCING A LOW-ZIPED TAPE FROM ALUMINUM OR AN ALUMINUM ALLOY | |
| US3186045A (en) | Method of casting composite cooking vessel | |
| JPH02127916A (en) | Manufacture of 7000 group al alloy extruded material suppressing surface recrystallization | |
| DE1942170A1 (en) | Process for the manufacture of fiber-reinforced composite materials | |
| JPH0445577B2 (en) | ||
| JP7326615B2 (en) | Coated thermoformed parts with superior performance and methods of making same | |
| JPH06194092A (en) | Manufacture of aluminum flat tube for heat exchanger | |
| JPS5931588B2 (en) | Zinc coating method on aluminum surface | |
| JPS6116138B2 (en) | ||
| JPS6049801A (en) | Manufacture of hot rolling steel sheet having shaped cross section | |
| KR102058717B1 (en) | Hot dip aluminum plated steel sheet for preventing the formation of surface spangle | |
| JPH01170553A (en) | Device for manufacturing rapid cooling metal thin strip | |
| JPH08218160A (en) | Production of high corrosion resistant zinc-aluminum alloy plated steel sheet by double layer spray plating | |
| JPH02117711A (en) | Manufacture of extruded material | |
| DE2241628A1 (en) | Composite bearing bush material - with metallic coating sprayed on bearing metal-steel sandwich | |
| GB2189728A (en) | Coated wire manufacturing method | |
| JPS606441A (en) | Manufacture of gas-permeable film | |
| JPS6326318A (en) | Production of preform wire and preform sheet | |
| DE2013355C (en) | Method for producing an annular groove reinforcement in a piston made of a light metal alloy | |
| DE952586C (en) | Process for the production of brittle metal powders | |
| EP1813353A2 (en) | Flame spray apparatus and method | |
| CH465780A (en) | Process for the production of a composite material | |
| JPS6059057A (en) | Production of steel sheet alloyed on one side to different thickness |