JP2002348646A - Long size coil of wrought magnesium alloy and manufacturing method therefor - Google Patents
Long size coil of wrought magnesium alloy and manufacturing method thereforInfo
- Publication number
- JP2002348646A JP2002348646A JP2001157174A JP2001157174A JP2002348646A JP 2002348646 A JP2002348646 A JP 2002348646A JP 2001157174 A JP2001157174 A JP 2001157174A JP 2001157174 A JP2001157174 A JP 2001157174A JP 2002348646 A JP2002348646 A JP 2002348646A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- width direction
- thin plate
- magnesium alloy
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
- B21C35/023—Work treatment directly following extrusion, e.g. further deformation or surface treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/06—Making sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、プレスによる深
絞り成形、曲げ成形、しごき成形、穴開け加工、穴広げ
加工等又はこれらを組合せた塑性加工に適した材料を提
供することを目的とした展伸用の長尺マグネシウム合金
コイル及びその製造方法に関する。BACKGROUND OF THE INVENTION The present invention has an object to provide a material suitable for deep drawing, bending, ironing, drilling, hole expanding, etc., or plastic working using a combination thereof. The present invention relates to a long magnesium alloy coil for drawing and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】元来、マグネシウム合金の比重は、鉄の
１／４、アルミニウムの２／３、チタンの１／３と実用
金属の中で最も軽く、かつ資源が多く存在することと、
融点温度が低いことから再生エネルギーが非常に少な
く、リサイクル性に優れていること等の特徴がある。従
ってマグネシウム合金は、各種機器の部品、例えばパソ
コンや携帯電話の筐体、自動車や電機機器の部品として
ダイカストあるいは射出成形法によって作られている。2. Description of the Related Art Originally, the specific gravity of magnesium alloy is 1/4 of iron, 2/3 of aluminum, 1/3 of titanium, which is the lightest among practical metals and has a lot of resources.
Due to the low melting point temperature, there are features such as very little regeneration energy and excellent recyclability. Therefore, magnesium alloys are produced by die-casting or injection molding as parts for various devices, for example, housings for personal computers and mobile phones, automobiles and electric appliances.
【０００３】従来重量％で希土類金属０．５〜１．５
％、ジルコニウム０．１〜０．６％、亜鉛２．０〜４．
０％を含有し、残部が実質的にマグネシウムからなる合
金湯を鋳造し、鋳塊を熱間圧延した後、１８０℃〜２３
０℃で圧下率４０％〜７０％の温間加工するプレス成形
性に優れたマグネシウム合金薄板の製造方法が提案され
ている（特開平６−２９３９４４）。Conventionally, the rare earth metal is 0.5 to 1.5% by weight.
%, Zirconium 0.1-0.6%, zinc 2.0-4.
After casting an alloy bath containing 0% and the balance substantially consisting of magnesium, and hot rolling the ingot,
A method of manufacturing a magnesium alloy sheet having excellent press formability, which is subjected to warm working at a rolling reduction of 40% to 70% at 0 ° C., has been proposed (JP-A-6-293944).
【０００４】また深絞りその他の塑性加工に適する金属
薄板を得る為に、金属薄板を巾方向及び長手方向に圧延
する圧延方法及び装置の提案もある（特公昭６２−４５
００７）。In order to obtain a metal sheet suitable for deep drawing and other plastic working, there is a proposal of a rolling method and apparatus for rolling the metal sheet in the width direction and the longitudinal direction (Japanese Patent Publication No. 62-45).
007).
【０００５】[0005]
【発明により解決しようとする課題】前記マグネシウム
合金薄板の製造方法は、熱間及び温間加工という制約が
あるのみならず、圧下率が大きいなどの理由により、表
面粗度が悪く、かつ巾方向圧延をしていないので、縦横
の材質が均一になりにくい問題点があり、特に薄板の場
合に問題点があった。The method for producing a magnesium alloy sheet described above is not only limited by hot and warm working, but also has a poor surface roughness due to a large reduction ratio and a width direction. Since it is not rolled, there is a problem in that the vertical and horizontal materials are difficult to be uniform, and particularly in the case of a thin plate.
【０００６】この発明におけるマグネシウム合金溶湯は
丸型あるいは矩形状の鋳塊に鋳造される。鋳造は連続、
半連続あるいはパッチ処理で行うが、成分の均一化が容
易である連続式鋳造が望ましい。The molten magnesium alloy of the present invention is cast into a round or rectangular ingot. Casting is continuous,
It is carried out by semi-continuous or patch processing, but continuous casting which makes it easy to make the components uniform is desirable.
【０００７】前記により成形された鋳塊（インゴット）
を２００℃〜４５０℃の範囲で押出し加工し、薄板にす
る。１個の鋳塊から複数枚押出すことも可能であるが、
均質な薄板を得るためには１枚の薄板を押出すことが望
ましい。この時に、鋳塊の断面積が縮減あるいは拡大さ
れて薄板の断面積になるが、薄板の結晶粒組織を小さく
して機械特性を良好にするためには、縮減される方が有
利である。例えば直径１５０ｍｍの丸型鋳塊（断面積：
約１６５０ｍｍ２）を１．６ｍｍ厚×１５０ｍｍ巾（断
面積：２４０ｍｍ２）の薄板に押出し加工する。The ingot (ingot) formed as described above
Is extruded in the range of 200 ° C. to 450 ° C. to make a thin plate. It is also possible to extrude multiple pieces from one ingot,
It is desirable to extrude one sheet in order to obtain a homogeneous sheet. At this time, the cross-sectional area of the ingot is reduced or enlarged to become the cross-sectional area of the thin plate. However, in order to reduce the grain structure of the thin plate and improve the mechanical properties, it is more advantageous to reduce the cross-sectional area. For example, a 150 mm diameter round ingot (cross-sectional area:
Approximately 1650 mm 2 ) is extruded into a 1.6 mm thick × 150 mm wide (cross-sectional area: 240 mm 2 ) thin plate.
【０００８】前記押出し加工は従来の熱間圧延に比べ
て、一度の処理で薄板を得られることから処理費用は極
めて安価である。しかしながら、従来の熱間圧延に比べ
て板断面の形状が不均一であり、又は押出し鋳型の熱変
化によって押出し処理が進むに連れて断面形状が変化す
る。このためにこの薄板をそのまま通常の圧延を行った
場合には、良好な板形状が得られない。例えば押出し薄
板の巾方向の位置で片側が厚い場合には、圧延で厚い側
が伸びるために曲るおそれがある。また押出し薄板の巾
方向で中央が厚い場合には、圧延で中央が伸びるために
中伸び形状、あるいは破断のおそれがある。次に押出し
薄板の巾方向で両端が厚い場合には、圧延で両端が伸び
るために耳波形状になる。そこでこの出願の発明者はこ
のような押出し薄板の断面形状の不均一を解決する方法
として、長手方向に対して巾方向に圧延することが極め
て有効であることを確認した。[0008] Compared with conventional hot rolling, the extrusion process can obtain a thin plate in one process, so that the processing cost is extremely low. However, the cross-sectional shape of the plate is not uniform as compared with the conventional hot rolling, or the cross-sectional shape changes as the extrusion process proceeds due to a change in heat of the extrusion mold. For this reason, when this thin plate is subjected to ordinary rolling as it is, a good plate shape cannot be obtained. For example, when one side is thick at a position in the width direction of the extruded thin plate, the thick side may be bent because the thick side is elongated by rolling. When the center of the extruded thin plate is thick in the width direction, the center is elongated by rolling, so that there is a possibility that the extruded thin plate has a middle stretched shape or is broken. Next, when both ends are thick in the width direction of the extruded thin plate, the ends are elongated by rolling, so that the extruded thin plate has an undulating shape. Therefore, the inventor of the present application has confirmed that rolling in the width direction with respect to the longitudinal direction is extremely effective as a method for solving such unevenness in the cross-sectional shape of the extruded thin plate.
【０００９】巾方向に連続的に圧延可能な圧延機とし
て、例えば特許２９９０６１８号がある。この場合に上
下の圧延治具としては図１に示す２個のロール、あるい
は図２に示す１個のロールと１台の固定金型（アンビ
ル）の組合せがあり、何れでも可能である。このように
巾方向に圧延することによって押出し薄板の巾方向での
板厚形状は均一になる。As a rolling mill capable of continuously rolling in the width direction, there is, for example, Japanese Patent No. 2990618. In this case, as the upper and lower rolling jigs, there are two rolls shown in FIG. 1 or a combination of one roll and one fixed die (anvil) shown in FIG. 2, and any of them is possible. By rolling in the width direction in this way, the thickness of the extruded thin plate in the width direction becomes uniform.
【００１０】この時の圧延温度は高いほど板が軟質であ
るために、圧延後のスプリングバックを少なくするため
に、より巾方向での断面形状は均一になることが望まし
い。例えば、１５０℃〜２７０℃が望ましい。At this time, the higher the rolling temperature is, the softer the sheet is. Therefore, in order to reduce springback after rolling, it is desirable that the cross-sectional shape in the width direction is more uniform. For example, 150 ° C to 270 ° C is desirable.
【００１１】また合金の成分系によって温室での強加工
が不可能な場合には、加工が可能な温度にして圧延を行
うことが必須であるが、室温での加工が可能な合金の成
分系で温度を上げて圧延することは必ずしも必要ではな
い。When strong working in a greenhouse is not possible due to the composition of the alloy, it is essential to perform rolling at a temperature at which working is possible. It is not always necessary to raise the temperature in the rolling.
【００１２】巾方向への圧延の圧下率は、押出し薄板の
板厚不均一が大きいほど高くすることが必要であるが、
圧下率として１０％以上行えば充分である。The rolling reduction in the width direction needs to be increased as the thickness of the extruded thin plate becomes larger.
It is sufficient if the rolling reduction is 10% or more.
【００１３】このような巾方向の圧延の有効性は、板厚
形状がより不均一である巾広の押出し薄板、またこの発
明が特に機器の筐体への応用を主目的にしていることか
ら巾広の押出し薄板ほど大きいので、巾１００ｍｍ以上
の押出し薄板に適用することが望ましい。The effectiveness of such rolling in the width direction is due to the fact that the present invention is mainly applied to a wide extruded thin plate having a non-uniform thickness, and particularly to an application to a housing of equipment. The wider the extruded thin plate is, the larger the extruded thin plate is.
【００１４】この巾方向の圧延によって、製品まで仕上
げることも可能であるが、薄塗り塗装を可能にするため
に、この発明では、巾方向の圧延後に長手方向、即ち巾
方向の直角方向にロールによる圧延を行うことが構成要
素になる。Although it is possible to finish the product by this rolling in the width direction, in order to enable thin coating, in the present invention, after rolling in the width direction, the roll is rolled in the longitudinal direction, that is, in the direction perpendicular to the width direction. Is a constituent element.
【００１５】巾方向への圧延は板断面形状の改善には有
効であるが、板平面の平滑性からは問題点が生じる。即
ち、巾方向への圧延を連続的に長尺状で行うためには、
板が圧延治具と絶えず接触していては不可能であるため
に、巾方向へ圧延した後、圧延治具を板から離し、板を
一定長だけ進行方向に移動させ、その後巾方向に圧延す
ることを繰り返すことが必須である。[0015] Rolling in the width direction is effective for improving the cross-sectional shape of the sheet, but causes a problem in terms of the smoothness of the sheet plane. That is, in order to continuously roll in the width direction in a long shape,
Since it is impossible if the plate is in constant contact with the rolling jig, after rolling in the width direction, the rolling jig is separated from the plate, the plate is moved in the traveling direction by a certain length, and then rolled in the width direction It is essential to repeat what you do.
【００１６】このような間欠的な巾方向の圧延を行う
と、長手の進行方向で、巾方向の１回目の圧延とその後
の巾方向の圧延との境目に若干の筋が巾方向に出てく
る。この巾方向での筋を無くするために必要な長手方向
への圧下量は、２０％以上が望ましい。上側の圧延治具
をロールとし、下側の圧延治具を固定金型（アンビル）
として、巾方向に１０％の圧下率で圧延し、その後長手
方向に３０％の圧下率でロールによって圧延した場合の
板表面粗度を図３及び図４に示した。薄板の表、裏とも
に表面粗さＲａが１μｍ前後で、平滑性が良好である。
上下圧延治具がロールの場合に比べ、上側の圧延治具が
ロールで下側が固定金型の場合は板と金型の接触が厳し
いので長手方向のロールによる圧延率を高めることが望
ましい。この長手方向の圧延温度は室温で強圧延加工が
可能である成分系では室温圧延が表面平滑性からは望ま
しい。室温での強圧延が不可能な成分系では、圧延可能
な温度にして圧延することもこの発明範囲である。When such intermittent rolling in the width direction is performed, some streaks appear in the width direction at the boundary between the first rolling in the width direction and the subsequent rolling in the width direction in the longitudinal traveling direction. come. The amount of reduction in the longitudinal direction required to eliminate the streaks in the width direction is desirably 20% or more. The upper rolling jig is a roll and the lower rolling jig is a fixed mold (anvil)
3 and 4 show the sheet surface roughness in the case of rolling at a rolling reduction of 10% in the width direction and then rolling at a rolling reduction of 30% in the longitudinal direction by rolls. The surface roughness Ra of both the front and back sides of the thin plate is around 1 μm, and the smoothness is good.
Compared to the case where the upper and lower rolling jigs are rolls, when the upper rolling jig is a roll and the lower one is a fixed mold, the contact between the plate and the mold is severe. Therefore, it is desirable to increase the rolling ratio by the longitudinal roll. The rolling temperature in the longitudinal direction is preferably a room temperature rolling from the viewpoint of surface smoothness in a component system in which strong rolling can be performed at room temperature. In a component system that cannot be strongly rolled at room temperature, rolling at a rolling temperature is also within the scope of the present invention.
【００１７】以上のように、この発明は熱間で鋳塊を押
出して薄板を製造する工程、巾方向圧延する工程、さら
に長手方向に圧延する工程の利点と問題点の特徴を有機
的に組合せることによって、形状と平滑性の良好な展伸
性の長尺マグネシウム合金コイルとその製造方法を提供
するものである。As described above, the present invention organically combines the advantages of the steps of manufacturing a thin plate by extruding an ingot with hot working, the step of rolling in the width direction, and the step of rolling in the longitudinal direction, and the problems. Accordingly, the present invention provides an extendable long magnesium alloy coil having good shape and smoothness and a method for manufacturing the same.
【００１８】なお、巾方向の圧延を３０％前後の圧下
率、そして長手方向の圧下率を３５％前後行えば、成品
の巾方向と長手方向の機械特性である伸び、強度が等方
的になり、プレス成形性が改善される。If the rolling in the width direction is performed at a rolling reduction of about 30% and the rolling reduction in the longitudinal direction is performed at about 35%, the elongation and strength, which are the mechanical properties of the product in the width and longitudinal directions, are isotropic. And press formability is improved.
【００１９】前記巾方向圧延の方法は優れており、幾多
の品質良好な薄板を提供したのであるが、マグネシウム
合金については、考慮されていなかったので、未知の技
術として研究の結果、幾多の問題点を克服し、良質のマ
グネシウム合金薄板の高速加工に成功したのである。Although the above-mentioned width rolling method is excellent and has provided many thin sheets of good quality, magnesium alloys have not been considered, and as a result of research as an unknown technique, there have been many problems. Overcoming the problems, the company succeeded in high-speed machining of high-quality magnesium alloy sheets.
【００２０】[0020]
【課題を解決するための手段】この発明は、マグネシウ
ム合金スラブを熱間で薄板に押出し成形し、この薄板を
巾方向へ圧延すると共に、長手方向へ圧延して、良品の
マグネシウム合金コイルを得ることに成功し、前記従来
の問題点を解決したのである。SUMMARY OF THE INVENTION According to the present invention, a magnesium alloy slab is extruded into a thin plate by heating, and the thin plate is rolled in the width direction and rolled in the longitudinal direction to obtain a good-quality magnesium alloy coil. This succeeded in solving the above-mentioned conventional problems.
【００２１】即ちコイルの発明は、鋳造したマグネシウ
ム合金のインゴットを熱間で薄板に押出成形し、該薄板
を巾方向に圧延すると共に、長手方向に圧延したことを
特徴とする展伸用の長尺マグネシウム合金コイルであ
り、薄板の巾は１００ｍｍ以上とし、巾方向の圧下率は
１０％以上とし、長手方向の圧下率は２０％以上とし、
巾が１２０ｍｍ〜３５０ｍｍ、厚さが０．０３ｍｍ〜
１．２ｍｍとし、表面粗度を表わす平均粗さＲａが５μ
ｍ以下としたものである。That is, the invention of the coil is characterized in that an ingot of a cast magnesium alloy is extruded into a thin plate by heating, and the thin plate is rolled in the width direction and rolled in the longitudinal direction. It is a length magnesium alloy coil, the width of the thin plate is 100 mm or more, the rolling reduction in the width direction is 10% or more, the rolling reduction in the longitudinal direction is 20% or more,
120mm ~ 350mm in width, 0.03mm ~ in thickness
1.2 mm, the average roughness Ra representing the surface roughness is 5μ
m or less.
【００２２】また方法の発明は、マグネシウム合金溶湯
をインゴットに鋳造し、該インゴットを熱間で薄板に押
出し成形した後、該薄板を巾方向に圧延し、ついで長手
方向に圧延することを特徴とした展伸用の長尺マグネシ
ウム合金コイルの製造方法である。次に薄板は、巾を１
００ｍｍ以上に押出し成形し、巾方向に１０％以上の圧
下率で多段圧延すると共に、長手方向へ２０％以上の総
圧下率で多段圧延すると共に、表面の平均粗度Ｒａを５
μｍ以下にするものであり、巾方向の圧延における温度
は常温〜２７０℃とするものである。Further, the invention of the method is characterized in that a molten magnesium alloy is cast into an ingot, and the ingot is extruded into a thin plate while hot, and then the thin plate is rolled in the width direction and then rolled in the longitudinal direction. This is a method for producing a long magnesium alloy coil for drawing. Next, for the thin plate,
Extrusion molding to at least 00 mm, multi-stage rolling at a rolling reduction of 10% or more in the width direction, multi-stage rolling at a total rolling reduction of 20% or more in the longitudinal direction, and an average surface roughness Ra of 5%.
μm or less, and the temperature in the rolling in the width direction is from room temperature to 270 ° C.
【００２３】この発明の対象となるマグネシウム合金
は、ＪＩＳに展伸用として規格化されているＭｇ−Ａｌ
−Ｚｎ系及びＭｇ−Ｚｎ−Ｚｒ系が中心であるが、その
他開発が進められているＭｇ−Ｌｉ−Ａｌ系及びＭｇ−
Ｍｎ系についても対象とすることができる。The magnesium alloy which is the object of the present invention is Mg-Al, which is standardized in JIS for spreading.
-Zn-based and Mg-Zn-Zr-based are mainly used, but other Mg-Li-Al-based and Mg-
Mn-based materials can also be used.
【００２４】[0024]
【発明の実施の形態】この発明は、マグネシウム合金の
インゴットを、熱間で薄板に押出成形し、この薄板を常
温又は温間で巾方向に圧延し、ついで長手方向に圧延し
て展伸用の長尺マグネシウム合金コイルとするものであ
り、前記連続加工ラインとした製造方法である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a magnesium alloy ingot which is extruded into a thin plate at a hot temperature, and the thin plate is rolled in the width direction at room temperature or warm temperature and then rolled in the longitudinal direction. This is a manufacturing method in which a continuous magnesium alloy coil is used.
【００２５】前記熱間押出成形は２００℃〜４５０℃と
し、巾方向及び長手方向の圧延は常温〜２７０℃とす
る。前記加工により、巾１２０ｍｍ〜３５０ｍｍで厚さ
０．０３ｍｍ〜１．２ｍｍのコイルを得る。The hot extrusion is carried out at a temperature of 200 to 450 ° C., and the rolling in the width direction and the longitudinal direction is carried out at a normal temperature to 270 ° C. By the above processing, a coil having a width of 120 mm to 350 mm and a thickness of 0.03 mm to 1.2 mm is obtained.
【００２６】[0026]
【実施例１】この発明の実施例を図１について説明す
る。マグネシウム合金のインゴット２２を４００℃で薄
板（テープ３、厚さ１．６ｍｍ、巾１５０ｍｍ）に押し
出し成形し、このテープ３をテーパーロール１、１ａ
（又はロール軸を傾斜させたロール）にかけ、総圧下率
２０％で巾方向へ圧延し、次いでロール２３、２３ａ、
２４、２４ａにかけて長手方向へ圧延する。この場合の
総圧下率は１０％〜３５％とし、１回の圧下率により、
長手方向の圧延に必要なローラ数を定める。図中２５、
２５ａはテープ３を間欠移動させる引張ロール２６は、
テープの張力を一定に保つ為の調整ロールである。即
ち、巾方向の圧延は間欠的に行われ、長手方向の圧延は
連続的に行われるので、調整ローラにより、加工速度の
相違を調整する。Embodiment 1 An embodiment of the present invention will be described with reference to FIG. A magnesium alloy ingot 22 is extruded at 400 ° C. into a thin plate (tape 3, thickness 1.6 mm, width 150 mm), and the tape 3 is tapered into rolls 1 and 1a.
(Or a roll with an inclined roll axis), and rolled in the width direction at a total draft of 20%, and then rolls 23, 23a,
Rolled in the longitudinal direction over 24 and 24a. In this case, the total rolling reduction is 10% to 35%, and by one rolling reduction,
Determine the number of rollers required for longitudinal rolling. 25 in the figure,
25a is a tension roll 26 for intermittently moving the tape 3,
An adjusting roll for keeping the tape tension constant. That is, since the rolling in the width direction is performed intermittently and the rolling in the longitudinal direction is performed continuously, the difference in the processing speed is adjusted by the adjusting roller.
【００２７】[0027]
【実施例２】アルミ：３％、亜鉛：１％、残部：不可避
的な不純物を含む約７ｋｇのマグネシウム合金の鋳造イ
ンゴットを熱間押出しにて、幅１２０ｍｍ、厚さ１．５
ｍｍのコイルにした。この後、１８０℃の温度で巾方向
に約２％づつの圧下率で複数回の圧延を行い、その時の
合計圧下率を５％、１０％、３０％で行った。その後、
各圧下率の板について、圧延ロールの研磨仕上げをＲｍ
ａｘ＝３Ｓ（ＪＩＳ基準）とし、それぞれ長手方向に５
％、１０％、３５％で、圧延を１８０℃で行った。この
場合における薄板の長手方向の曲り形状、表面粗度及び
機械特性は表１の通りである。EXAMPLE 2 A cast ingot of about 7 kg of a magnesium alloy containing 3% of aluminum, 1% of zinc, and the balance: inevitable impurities was hot-extruded to a width of 120 mm and a thickness of 1.5 mm.
mm coil. Thereafter, rolling was performed a plurality of times in the width direction at a temperature of 180 ° C. at a rolling reduction of about 2%, and the total rolling reduction was 5%, 10%, and 30%. afterwards,
Polishing finish of the rolling roll is Rm
ax = 3S (JIS standard), 5
%, 10% and 35% at 180 ° C. Table 1 shows the bent shape, surface roughness, and mechanical properties of the thin plate in this case in the longitudinal direction.
【００２８】[0028]
【表１】 [Table 1]
【００２９】即ち巾方向の圧下率が１０％、３０％そし
て、長手方向の圧下率が１０％、３５％のものは板の曲
りもなく直線状で圧延がされており、また板表面粗度も
平均粗さが５μｍ以下と良好である。巾方向の圧下率が
５％の場合には長手方向の圧延時に板曲りが発生してい
る。That is, when the rolling reduction in the width direction is 10% or 30%, and when the rolling reduction in the longitudinal direction is 10% or 35%, the plate is rolled straight without bending and the surface roughness of the plate is increased. Also, the average roughness is as good as 5 μm or less. When the rolling reduction in the width direction is 5%, sheet bending occurs during rolling in the longitudinal direction.
【００３０】巾方向の圧下率が１０％、３０％の場合で
も、長手方向の圧下率が５％では板表面粗度の平均粗さ
Ｒａが５μｍを超えており、平滑度が悪い。また巾方向
の圧下率が３０％で長手方向の圧下率が３５％の場合の
機械特性は、巾方向と長手方向の伸びと引張強さがほぼ
同じであり、ほかの場合に比べて等方的（均一）であ
る。Even when the rolling reduction in the width direction is 10% or 30%, when the rolling reduction in the longitudinal direction is 5%, the average roughness Ra of the plate surface roughness exceeds 5 μm, and the smoothness is poor. When the reduction ratio in the width direction is 30% and the reduction ratio in the longitudinal direction is 35%, the mechanical properties are almost the same in the elongation and the tensile strength in the width direction and the longitudinal direction, and are isotropic compared to other cases. Target (uniform).
【００３１】前記実施例のコイルを製造する際に、巾方
向の圧延に用いたロール装置を図２及び図３に基づいて
説明する。A roll device used for rolling in the width direction when manufacturing the coil of the above embodiment will be described with reference to FIGS.
【００３２】図２は、上下のテーパーロール１、１ａの
ロール軸２、２ａと平行に加工すべきテープ３を矢示４
のように送入し、前記テーパーロール１、１ａを矢示５
又は６の方向に回転して、前記テープ３を巾方向へテー
プ３ａのように圧延し、前記テーパーロールの圧下力が
働かない時に、前記テープ３を矢示４の方向へ移動させ
て、逐次圧延する。この場合に、テーパーロール１、１
ａを通過した際、圧下率２０％とするならば、前記テー
パーロール１、１ａを通過する間におけるテープ３の間
欠移動回数により、１回の圧下率が定まる。FIG. 2 shows a tape 3 to be processed in parallel with the roll shafts 2 and 2a of the upper and lower tapered rolls 1 and 1a.
And taper rolls 1 and 1a are indicated by arrows 5
Or, the tape 3 is rolled in the width direction like a tape 3a by rotating in the direction of 6, and the tape 3 is moved in the direction of the arrow 4 when the rolling force of the taper roll does not work. To roll. In this case, the tapered rolls 1,
If the reduction rate is 20% when the tape 3 passes through the taper rolls 1 and 1a, one reduction rate is determined by the number of intermittent movements of the tape 3 while passing through the tapered rolls 1 and 1a.
【００３３】図３は、アンビル７上へ、テープ３を矢示
８の方向へ移動可能に乗せ、前記テープ３上へテーパー
ロール９を、その軸９ａが前記テープ３の進行方向と平
行になるように、回転可能に当接し、テーパーロール９
の軸受け１０にロッド１１の一端を取り付け、ロッド１
１を矢示１２又は１３の方向へ移動させて、前記テーパ
ーロール９を矢示１４又は１５の方向へ転動させること
により、前記テープ３を巾方向へ圧延する。図中１６は
軸受け１０に架設したコロ、１７は軸受け固定ピン、１
８はロッド取付け軸、１９、１９は全ロール機構を持ち
上げているスプリング（バランススプリング）、２０は
アンビルの電熱線孔、２１は同じく冷却用孔である。前
記実施例において、ロッド１１を矢示１２又は１３の方
向へ往復移動させると、テーパーロール９が矢示１４又
は１５の方向へ回転するので、アンビル７とテーパーロ
ール９との間で適度の圧下率で、テープ３を巾方向へ圧
延する。この場合に、テーパーロール９がテープ３を所
定長さだけ、矢示８の方向へ間欠移動させることによ
り、圧延は続行される。前記において、一パスに３０％
の総圧下率とするならば、１回の圧下率５％として、テ
ープ３を数回に分けて進行させる。FIG. 3 shows a state in which the tape 3 is movably mounted on the anvil 7 in the direction of arrow 8, and the taper roll 9 is placed on the tape 3 so that its axis 9a is parallel to the traveling direction of the tape 3. So that the tapered roll 9
One end of the rod 11 is attached to the bearing 10 of the
The tape 3 is rolled in the width direction by moving the taper roll 9 in the direction of arrow 14 or 15 by moving 1 in the direction of arrow 12 or 13. In the figure, 16 is a roller mounted on the bearing 10, 17 is a bearing fixing pin, 1
8 is a rod mounting shaft, 19 and 19 are springs (balance springs) for lifting the entire roll mechanism, 20 is a heating wire hole of the anvil, and 21 is a cooling hole. In the above embodiment, when the rod 11 is reciprocated in the direction of the arrow 12 or 13, the taper roll 9 rotates in the direction of the arrow 14 or 15, so that an appropriate reduction between the anvil 7 and the taper roll 9 is performed. The tape 3 is rolled in the width direction at a predetermined rate. In this case, the taper roll 9 intermittently moves the tape 3 by a predetermined length in the direction of the arrow 8 to continue the rolling. In the above, 30% per pass
If the total reduction ratio is set to 5%, the tape 3 is advanced several times by setting the reduction ratio to 5% at one time.
【００３４】[0034]
【実施例３】（Ａ）アルミ：３％、Ｚｎ：１％、残部：
不可避的な不純物と、（Ｂ）リチウム：１４％、アル
ミ：１％、残部：不可避的な不純物を含むそれぞれ約７
ｋｇの２種類のマグネシウム合金の鋳造インゴットを熱
間押出しにて、幅１５０ｍｍ、厚さ１．２ｍｍのコイル
にした。この後、室温、１８０℃、３５０℃の温度で巾
方向に約２．５％づつの圧下率で複数回の圧延を行い、
その時の合計圧下率は２０％であった。その後、室温、
１８０℃の温度で長手方向に３％の圧下率で複数回圧延
し、総圧下率４０％で圧延した。その場合の、圧延時の
割れ、機械特性を表２に示した。Embodiment 3 (A) Aluminum: 3%, Zn: 1%, balance:
Inevitable impurities and (B) about 14% each containing lithium: 14%, aluminum: 1%, balance: unavoidable impurities
kg of two types of magnesium alloy cast ingots were formed into a coil having a width of 150 mm and a thickness of 1.2 mm by hot extrusion. Thereafter, rolling is performed a plurality of times in the width direction at room temperature, 180 ° C., and 350 ° C. with a rolling reduction of about 2.5%,
The total draft at that time was 20%. Then at room temperature,
It was rolled a plurality of times at a temperature of 180 ° C. at a rolling reduction of 3% in the longitudinal direction, and rolled at a total rolling reduction of 40%. Table 2 shows the cracks and mechanical properties during rolling in this case.
【００３５】（Ｂ）の成分系では圧延温度が室温でも圧
延時の割れは発生しないが、（Ａ）の成分系では室温で
圧延した場合に割れが発生する。In the component system (B), cracking does not occur during rolling even at a rolling temperature of room temperature, but in the component system (A), cracking occurs when rolling at room temperature.
【００３６】巾方向の圧延温度が１８０℃の場合、３５
０℃の場合に比べて、伸びは大きく、引張強さは高くて
優れている。When the rolling temperature in the width direction is 180 ° C., 35
Compared to the case of 0 ° C., the elongation is large and the tensile strength is high and excellent.
【００３７】[0037]
【表２】 [Table 2]
【００３８】[0038]
【発明の効果】この発明によれば、連続的プレス成形加
工を可能にし、また成形加工後の塗装を美麗かつ簡便に
行うことを可能にする形状と平滑性の良好な展伸用の長
尺マグネシウム合金コイルを提供すると共に、その多量
生産を容易にした効果がある。According to the present invention, a continuous press-forming process, and a long shape for drawing that have good shape and smoothness to enable beautiful and simple coating after the forming process. The present invention has an effect of providing a magnesium alloy coil and facilitating mass production thereof.
【００３９】また、巾方向圧下率と長手方向圧下率を組
合せることによって、巾方向と長手方向の伸び、引張強
さなどの機械特性を等方的（均一）にすることによっ
て、プレス成形などの塑性加工により良質の製品を成形
することができる。Further, by combining the width-direction reduction ratio and the longitudinal-direction reduction ratio to make the mechanical properties such as elongation and tensile strength in the width direction and the longitudinal direction isotropic (uniform), press molding and the like can be performed. A good quality product can be formed by the plastic working of.
【図１】 （ａ）この発明の加工ラインの正面概念図。 （ｂ）同じく平面概念図。FIG. 1A is a conceptual front view of a processing line according to the present invention. (B) Conceptual plan view.
【図２】 同じく実施例に使用する上下ロールによる巾
方向圧延を示す概念図。FIG. 2 is a conceptual diagram showing widthwise rolling by upper and lower rolls used in the embodiment.
【図３】 同じく上側ロールと下側固定金型による巾方
向圧延を示す概念図。FIG. 3 is a conceptual diagram showing widthwise rolling by an upper roll and a lower fixed die.
【図４】 （ａ）同じく巾方向に２０％の圧下率で、長
手方向に３０％の圧下率で圧延した薄板の表面の粗度形
状を示すグラフ。 （ｂ）同じく薄板の裏面の粗度形状を示すグラフ。FIG. 4 (a) is a graph showing the roughness profile of the surface of a thin plate rolled at a rolling reduction of 20% in the width direction and at a rolling reduction of 30% in the longitudinal direction. (B) A graph showing the roughness profile on the back surface of the thin plate.
１、１ａ テーパーロール ３ テープ ７ アンビル ９ テーパーロール １０ 軸受け １１ ロッド 1, 1a taper roll 3 tape 7 anvil 9 taper roll 10 bearing 11 rod
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ２２Ｆ 1/00 ６２３ Ｃ２２Ｆ 1/00 ６２３ ６３０ ６３０Ｋ ６８３ ６８３ ６８５ ６８５Ａ ６８５Ｚ ６９４ ６９４Ａ ６９４Ｂ ６９４Ｚ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C22F 1/00 623 C22F 1/00 623 630 630K 683 683 683 685 685A 685Z 694 694A 694B 694Z
Claims (5)
間で薄板に押出成形し、該薄板を巾方向に圧延すると共
に、長手方向に圧延したことを特徴とする展伸用の長尺
マグネシウム合金コイル。1. A long magnesium alloy coil for drawing, wherein a cast magnesium alloy slab is hot extruded into a thin plate, and the thin plate is rolled in the width direction and rolled in the longitudinal direction. .
の圧下率は１０％以上とし、長手方向の圧下率は２０％
以上とし、巾が１２０ｍｍ〜３５０ｍｍ、厚さが０．０
３ｍｍ〜１．２ｍｍとし、表面粗度を表わす平均粗さＲ
ａが５μｍ以下としたことを特徴とする請求項１記載の
展伸用の長尺マグネシウム合金コイル。2. The thin plate has a width of 100 mm or more, a rolling reduction in the width direction of 10% or more, and a rolling reduction in the longitudinal direction of 20%.
The width is 120 mm to 350 mm and the thickness is 0.0
3 mm to 1.2 mm, average roughness R representing surface roughness
The long magnesium alloy coil for wrought according to claim 1, wherein a is 5 µm or less.
し、該スラブを熱間で薄板に押出し成形した後、該薄板
を巾方向に圧延し、ついで長手方向に圧延することを特
徴とした展伸用の長尺マグネシウム合金コイルの製造方
法。3. A drawing method comprising: casting a molten magnesium alloy into a slab; extruding the slab into a thin plate while hot; rolling the thin plate in a width direction; and then rolling in a longitudinal direction. Manufacturing method of long magnesium alloy coil.
形し、巾方向に１０％以上の圧下率で多段圧延すると共
に、長手方向へ２０％以上の圧下率で多段圧延すると共
に、表面の平均粗度Ｒａを５μｍ以下にすることを特徴
とした請求項３記載の展伸用の長尺マグネシウム合金コ
イルの製造方法。4. The thin plate is extruded to a width of 100 mm or more, and is multi-rolled at a rolling reduction of 10% or more in the width direction, and is multi-rolled at a rolling reduction of 20% or more in the longitudinal direction, and has an average surface. The method for producing a long magnesium alloy coil for wrought according to claim 3, wherein the roughness Ra is set to 5 µm or less.
０℃とすることを特徴とした請求項３又は４記載の展伸
用の長尺マグネシウム合金コイルの製造方法。5. The temperature in the rolling in the width direction is from room temperature to 27.
5. The method according to claim 3, wherein the temperature is set to 0 [deg.] C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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