JPH0116303B2 - - Google Patents
Info
- Publication number
- JPH0116303B2 JPH0116303B2 JP58116558A JP11655883A JPH0116303B2 JP H0116303 B2 JPH0116303 B2 JP H0116303B2 JP 58116558 A JP58116558 A JP 58116558A JP 11655883 A JP11655883 A JP 11655883A JP H0116303 B2 JPH0116303 B2 JP H0116303B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- wire drawing
- die
- niti alloy
- oxide film
- 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.)
- Expired
Links
- 238000005491 wire drawing Methods 0.000 claims description 43
- 229910045601 alloy Inorganic materials 0.000 claims description 26
- 239000000956 alloy Substances 0.000 claims description 26
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 20
- 239000000314 lubricant Substances 0.000 claims description 17
- 238000000137 annealing Methods 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000005554 pickling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Metal Extraction Processes (AREA)
- Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
Description
【発明の詳細な説明】
発明の分野
この発明は、NiTi合金の伸線方法、特にダイ
スを用いてインゴツトから所望の線材に伸線加工
する方法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a method for drawing a NiTi alloy, particularly in a method for drawing a wire from an ingot into a desired wire using a die.
先行技術の説明
NiTi系合金は、形状記憶効果、超弾性挙動お
よび防振効果などの種々の機能を有するため、
種々の用途における応用が考えられている。しか
しながら、NiTi合金は、加工が困難であるため、
製品が極めて高価なものとなるという問題が存在
する。Description of Prior Art NiTi-based alloys have various functions such as shape memory effect, superelastic behavior and vibration damping effect, so
Applications in various uses are being considered. However, NiTi alloy is difficult to process, so
The problem exists that the product becomes extremely expensive.
従来、NiTi合金線は、インゴツトを熱間加工
し、ダイスにより伸線することにより製造されて
いる。しかしながら、従来法では、NiTi合金は
活性金属Tiを含むためダイスと反応しやすく、
ダイスに焼付きやすく、したがつてダイス寿命を
極めて短いものにするという欠点があつた。ま
た、加工硬化しやすいため、伸線の際に断線しや
すいという欠点もあつた。このため多数の中間焼
鈍工程を実施しなければならないこと、また１回
の伸線にかかる断面減少率を大きくとることがで
きないことなどの問題があつた。 Conventionally, NiTi alloy wire has been manufactured by hot working an ingot and drawing it using a die. However, in the conventional method, NiTi alloy easily reacts with the die because it contains active metal Ti.
It has the disadvantage that it tends to seize on the die, thus making the life of the die extremely short. Furthermore, since it is easily work hardened, it also has the disadvantage of being prone to wire breakage during wire drawing. For this reason, there were problems such as having to perform a large number of intermediate annealing steps and not being able to increase the area reduction rate required for one wire drawing.
発明の目的
それゆえに、この発明の目的は、ダイス寿命を
延長することができ、かつ伸線の際の断線を有効
に防止することができ、したがつて工程数の削減
および１回の伸線当たりの断面減少率を大きくと
ることが可能なNiTi合金の伸線方法を提供する
ことにある。Purpose of the Invention Therefore, the purpose of the present invention is to be able to extend the life of the die and effectively prevent wire breakage during wire drawing, thereby reducing the number of steps and reducing the number of wire drawings in one time. The object of the present invention is to provide a method for drawing a NiTi alloy wire that can achieve a large reduction in area per hit.
発明の構成
この発明は、Ni50〜60重量％を含有し、残部
がTiよりなるNiTi合金またはNiもしくはTiの一
部を、全体の10重量％の範囲内でFe，Co，Cu，
Al，Zr，Ｖ等からなる群から選択される１種以
上の元素で置換してなるNiTi合金を伸線加工す
る方法であつて、ダイスにより伸線に先立ち、線
材表面に0.03から3μmの厚みの酸化被膜を存在さ
せておくことを特徴とする、NiTi合金の伸線方
法である。Structure of the Invention This invention provides a NiTi alloy containing 50 to 60% by weight of Ni and the remainder being Ti, or a part of Ni or Ti, within a range of 10% by weight of the total, such as Fe, Co, Cu, etc.
A method of wire drawing a NiTi alloy substituted with one or more elements selected from the group consisting of Al, Zr, V, etc., in which the wire surface is coated with a thickness of 0.03 to 3 μm using a die prior to wire drawing. This is a method for drawing a NiTi alloy, which is characterized by the presence of an oxide film.
すなわち、本願発明は、上記組成のNiTi合金
において、酸化被膜を線材表面に存在させておい
てから、ダイスによる伸線を行なうものである。
酸化被膜は、「ダイスによる伸線に先立ち、…酸
化被膜を存在させておく」ものであればよい。す
なわち、一般には複数個のダイスにより複数回の
伸線を行なうのが常であるが、各ダイスによる伸
線に先立ち常に酸化被膜を形成する必要はなく、
各ダイスによる伸線の際に酸化被膜が線材表面に
上記厚みで存在さえしておればよい。したがつ
て、初段のダイスによる伸線前に酸化被膜を形成
した場合、後段のダイスに挿入する際にも酸化被
膜が上記厚みで残存しておれば、後段のダイスに
よる伸線直前に再度酸化被膜を形成する必要はな
い。 That is, in the present invention, in the NiTi alloy having the above composition, an oxide film is formed on the surface of the wire, and then the wire is drawn using a die.
Any oxide film may be used as long as the oxide film is "existed prior to wire drawing using a die." That is, although wire drawing is generally performed multiple times using multiple dies, it is not necessary to always form an oxide film prior to wire drawing using each die.
It is only necessary that the oxide film be present at the above thickness on the wire surface during wire drawing using each die. Therefore, if an oxide film is formed before wire drawing with the first stage die, if the oxide film remains at the above thickness when inserted into the second stage die, it will be oxidized again immediately before wire drawing with the second stage die. It is not necessary to form a coating.
本願発明は、線材表面に上述に厚みの酸化被膜
を形成すれば、伸線時における線材の切断事故、
表面性状の変動を低減することができ、かつダイ
スの使用寿命を延長し得ることが可能となるとい
う知見に基づくものである。 The present invention provides that if an oxide film with the thickness described above is formed on the surface of the wire, cutting accidents of the wire during wire drawing can be avoided.
This is based on the knowledge that variations in surface properties can be reduced and the service life of the die can be extended.
酸化被膜に形成は、ダイスによる伸線加工に先
立つて行なわれる通常の歪取り焼鈍工程におい
て、雰囲気の酸化性を制御することにより行なつ
てもよく、この場合酸化性雰囲気としては酸素雰
囲気あるいは空気雰囲気等の公知の技術が用いら
れ得る。また、酸化被膜は、独立の工程により形
成されてもよいことは言うまでもない。 The oxide film may be formed by controlling the oxidizing nature of the atmosphere during a normal strain relief annealing process that is performed prior to wire drawing using a die. In this case, the oxidizing atmosphere may be an oxygen atmosphere or air. Known techniques such as atmosphere may be used. Moreover, it goes without saying that the oxide film may be formed by an independent process.
上述のように酸化被膜の厚みを「0.03〜3μm」
としたのは、0.03μm未満では伸線加工の改善効
果が少ないからであり、3μmを超えると最終段階
で除去に煩雑な操作を必要とし、かつ加工性完全
効果も飽和し、さらに内部のNiTi地金にも酸化
が及ぶおそれがあるからである。 As mentioned above, the thickness of the oxide film is "0.03 ~ 3 μm"
The reason for this is that if the diameter is less than 0.03 μm, there is little improvement in the wire drawing process, and if the diameter exceeds 3 μm, complicated operations are required for removal in the final stage, and the complete processability effect is saturated, and furthermore, the internal NiTi This is because there is a risk that the base metal will also be oxidized.
好ましくは、各ダイスによる伸線前であつて、
歪取り焼鈍後に、線材を少なくとも50℃以下に冷
却する。NiTi合金を冷却して、より軟らかなマ
ンテンサイトとし、伸線の際の断面減少率を向上
させるためである。 Preferably, before drawing with each die,
After strain relief annealing, the wire is cooled to at least 50°C or lower. This is to cool the NiTi alloy to make it softer mantensite and improve the cross-section reduction rate during wire drawing.
さらに好ましくは、ダイスによる伸線に際し、
潤滑剤が併せ用いられる。潤滑剤を用いることに
より、ダイスの焼付きをより効果的に防止するこ
とができる。潤滑剤としては、乾式潤滑剤および
油性潤滑剤の双方が用いられ得る。最も、線材の
径が約１〜３mm以上では乾式潤滑剤を用いること
が好ましく、これ以下の径では油性潤滑剤を用い
ることが好ましい。乾式潤滑剤は、潤滑性こそ良
好であるが、線材表面粗さを大きくするため最終
線径に近い径では外観性状を劣化させるからであ
り、油性潤滑剤は線材の表面性状を良好に保つこ
とができるが、逆に潤滑性が十分ではないからで
ある。 More preferably, during wire drawing with a die,
A lubricant is also used. By using a lubricant, seizure of the die can be more effectively prevented. As lubricants, both dry lubricants and oil-based lubricants can be used. It is most preferable to use a dry lubricant when the diameter of the wire is about 1 to 3 mm or more, and it is preferable to use an oil-based lubricant when the diameter is less than this. Dry lubricants have good lubricity, but they increase the surface roughness of the wire and deteriorate the appearance when the diameter is close to the final wire diameter. Oil-based lubricants are used to maintain good surface properties of the wire. However, the lubricity is not sufficient.
ダイスによる伸線終了後、酸化被膜が除去され
るが、好ましくは、連続電解酸洗いにより除去さ
れる。電解酸洗いで除去すれば、線材表面に損傷
を与えることなく酸化被膜の除去を行ない得るか
らである。もつとも、他の方法、たとえば薬品な
どにより酸化被膜を除去してもよいことは言うま
でもない。 After the wire drawing with the die is completed, the oxide film is removed, preferably by continuous electrolytic pickling. This is because if the oxide film is removed by electrolytic pickling, the oxide film can be removed without damaging the wire surface. However, it goes without saying that the oxide film may be removed by other methods, such as chemicals.
発明の効果
この発明は、上述のように、ダイスによる伸線
に先立ち、線材表面に0.03〜3μmの厚みの酸化被
膜を存在させておくため、酸化被膜のダイス壁面
との低反応性により、ダイスの焼付きを飛躍的に
低減することができ、したがつてダイス寿命を大
きく延長させ得る。また、酸化被膜の存在によ
り、NiTi合金の伸線の際の断線事故を有効に防
止することができ、さらに伸線加工時の線材表面
の荒れや焼付きをも確実に低減することができ
る。Effects of the Invention As described above, in this invention, an oxide film with a thickness of 0.03 to 3 μm is formed on the wire surface before wire drawing with a die. It is possible to dramatically reduce seizure and therefore greatly extend the life of the die. Furthermore, the presence of the oxide film can effectively prevent wire breakage accidents during wire drawing of the NiTi alloy, and can also reliably reduce roughness and seizure on the surface of the wire during wire drawing.
この発明は、各種ばね、アクチユエータなどに
用いられる形状記憶合金および超弾性合金として
のNiTi合金線の製造全般に利用することができ、
その産業上の効果は極めて大きなものである。 This invention can be used in general production of NiTi alloy wires as shape memory alloys and superelastic alloys used in various springs, actuators, etc.
Its industrial effects are extremely large.
実施例の説明
第１図は、この発明の一実施例の工程を説明す
るための略図的側面図である。この装置を用い
て、Ni55重量％、残部Tiよりなる合金線ならび
にNi56重量％、残部Tiよりなる合金線の２種類
の合金線につき伸線加工を行なつた。DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a schematic side view for explaining the steps of an embodiment of the present invention. Using this apparatus, two types of alloy wires were drawn: an alloy wire consisting of 55% by weight Ni and the balance being Ti, and an alloy wire consisting of 56% by weight Ni and the balance being Ti.
まず供給線材１（線径2.3mm）を準備した。次
に、雰囲気制御装置２を備える歪取り焼鈍炉３
に、秒速30ｍ／分の速度で通過させた。なお、歪
取り焼鈍炉３の温度は、800℃である。 First, supply wire 1 (wire diameter 2.3 mm) was prepared. Next, strain relief annealing furnace 3 equipped with atmosphere control device 2
was passed at a speed of 30 m/min. Note that the temperature of the strain relief annealing furnace 3 is 800°C.
次に歪取り焼鈍炉３の炉の外部に配置した冷却
装置４にて、冷風によつて室温（25℃）に冷却し
た後、第１の伸線ダイス５を用いて伸線加工を施
した。伸線ダイス５の径は2.0mmであり、潤滑剤
としてMoS2粉を混入したステアリン酸カルシウ
ム系固体潤滑剤を用いた。 Next, the strain relief annealing furnace 3 was cooled to room temperature (25° C.) by cold air in a cooling device 4 disposed outside the furnace, and then wire drawing was performed using a first wire drawing die 5. . The wire drawing die 5 had a diameter of 2.0 mm, and a calcium stearate solid lubricant mixed with MoS 2 powder was used as the lubricant.
次に、第２の伸線ダイス６（径は1.8mm）によ
り、２回目の伸線加工を施した。なお第２の伸線
ダイス６では、油性潤滑剤を用いた。第２の伸線
ダイス６により伸線した後、同じく雰囲気調整装
置８を有する歪取り焼鈍炉７を通過させ、最後に
電解酸洗い装置９を通過させることにより線材表
面の酸化被膜を除去し、巻取りリール１０により
巻取つた。 Next, a second wire drawing process was performed using a second wire drawing die 6 (diameter: 1.8 mm). Note that an oil-based lubricant was used in the second wire drawing die 6. After the wire is drawn by the second wire drawing die 6, it is passed through a strain relief annealing furnace 7 which also has an atmosphere adjustment device 8, and finally passed through an electrolytic pickling device 9 to remove the oxide film on the surface of the wire. It was taken up by a take-up reel 10.
なお、雰囲気調整装置２，８は、歪取り焼鈍炉
３，７内の酸化性度合を調整するために設けられ
ているものである。第１の伸線ダイス５に挿入さ
れる直前の酸化被膜の厚みを、雰囲気調整装置２
を調整することにより種々変化させ、１回の弾性
当たりの伸線加工量を調べたところ、第２図に示
す結果を得た。 The atmosphere adjusting devices 2 and 8 are provided to adjust the degree of oxidation within the strain relief annealing furnaces 3 and 7. The thickness of the oxide film just before it is inserted into the first wire drawing die 5 is adjusted by the atmosphere adjusting device 2.
When the amount of wire drawing per one elasticity was examined by varying the amount of wire drawing by adjusting the amount of elasticity, the results shown in FIG. 2 were obtained.
第２図から明らかなように、酸化被膜の厚みは
0.3〜3μmの範囲にあれば、伸線加工性が良好と
なることが理解される。また、この実施例におい
て、酸化被膜が0.1μm以下の厚みの場合には、ダ
イスの焼付きが頻繁に発生し、したがつてダイス
寿命も短かつたことを指摘しておく。 As is clear from Figure 2, the thickness of the oxide film is
It is understood that wire drawability will be good if it is in the range of 0.3 to 3 μm. Furthermore, it should be pointed out that in this example, when the oxide film had a thickness of 0.1 μm or less, die seizure occurred frequently and the life of the die was therefore shortened.
なお、第２の伸線ダイス６に挿入される直前の
状態における酸化被膜厚みは、第１の伸線ダイス
５の直前の状態に比べて約0.9倍であつた。 The thickness of the oxide film in the state immediately before being inserted into the second wire drawing die 6 was approximately 0.9 times that in the state immediately before being inserted into the first wire drawing die 5.
第１図は、この発明を実施する工程を略図的に
示す側面図である。第２図は、この発明の一実施
例の結果を表わす図であり、１回断線当たりの伸
線加工量を示す図である。
１…NiTi合金線、５，６…ダイス。
FIG. 1 is a side view schematically showing the steps for carrying out the invention. FIG. 2 is a diagram showing the results of one embodiment of the present invention, and is a diagram showing the amount of wire drawing per one wire breakage. 1...NiTi alloy wire, 5, 6...Dice.
Claims (1)
るNiTi合金または前記NiもしくはTiの一部を、
10重量％の範囲内でFe，Co，Cu，Al，Zr，Ｖ等
からなる群から選択される１種以上の元素で置換
してなるNiTi合金を伸線加工する方法であつて、 ダイスによる伸線に先立ち、線材表面に0.03〜
3μmの厚みの酸化被膜を存在させておくことを特
徴とする、NiTi合金の伸線方法。 ２ 前記酸化被膜は、ダイスによる伸線加工に先
立つて行なわれる歪取り焼鈍工程において、雰囲
気の酸化性を制御することにより形成される、特
許請求の範囲第１項記載のNiTi合金の伸線方法。 ３ 歪取り焼鈍後、ダイスによる伸線前に、線材
が少なくとも50℃以下に冷却される、特許請求の
範囲第２項記載のNiTi合金の伸線方法。 ４ ダイスによる伸線加工に際し、潤滑剤を用い
る、特許請求の範囲第１項ないし第３項のいずれ
かに記載のNiTi合金の伸線方法。 ５ 前記潤滑剤として、線材の直径が１〜３mm以
上の場合、乾式潤滑剤が用いられる、特許請求の
範囲第４項記載のNiTi合金の伸線方法。 ６ 前記潤滑剤として、線材の直径が１〜３mm以
下の場合、油性潤滑剤を用いる、特許請求の範囲
第４項記載のNiTi合金の伸線方法。[Claims] 1. A NiTi alloy containing 50 to 60% by weight of Ni and the remainder being Ti, or a part of the Ni or Ti,
A method of wire drawing a NiTi alloy substituted with one or more elements selected from the group consisting of Fe, Co, Cu, Al, Zr, V, etc. within a range of 10% by weight, using a die. 0.03~ on the wire surface before wire drawing
A method for drawing a NiTi alloy, characterized by the presence of an oxide film with a thickness of 3 μm. 2. The NiTi alloy wire drawing method according to claim 1, wherein the oxide film is formed by controlling the oxidizing nature of the atmosphere in a strain relief annealing step performed prior to wire drawing using a die. . 3. The NiTi alloy wire drawing method according to claim 2, wherein the wire rod is cooled to at least 50° C. or lower after strain relief annealing and before wire drawing using a die. 4. The method for drawing a NiTi alloy according to any one of claims 1 to 3, wherein a lubricant is used during the wire drawing process using a die. 5. The NiTi alloy wire drawing method according to claim 4, wherein a dry lubricant is used as the lubricant when the diameter of the wire is 1 to 3 mm or more. 6. The NiTi alloy wire drawing method according to claim 4, wherein an oil-based lubricant is used as the lubricant when the diameter of the wire is 1 to 3 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11655883A JPS609865A (en) | 1983-06-28 | 1983-06-28 | Drawing method of niti alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11655883A JPS609865A (en) | 1983-06-28 | 1983-06-28 | Drawing method of niti alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS609865A JPS609865A (en) | 1985-01-18 |
| JPH0116303B2 true JPH0116303B2 (en) | 1989-03-23 |
Family
ID=14690082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11655883A Granted JPS609865A (en) | 1983-06-28 | 1983-06-28 | Drawing method of niti alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609865A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61217564A (en) * | 1985-03-25 | 1986-09-27 | Hitachi Metals Ltd | Wire drawing method for niti alloy |
| JPH01215407A (en) * | 1988-02-22 | 1989-08-29 | Nippon Parkerizing Co Ltd | Method for lubricating treatment before cold drawing of steel stock |
| CN114908265B (en) * | 2022-06-02 | 2023-10-27 | 西安斯塔克材料科技有限公司 | Preparation method of TiNiAlV quaternary alloy filament |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53125257A (en) * | 1977-04-08 | 1978-11-01 | Kobe Steel Ltd | Extruding method for aluminum alloy containing mg and cu as alloy element at high temperature by hydrostatic pressure |
| JPS55104462A (en) * | 1979-02-01 | 1980-08-09 | Mitsubishi Metal Corp | Oxygen-free copper wire base material |
| JPS5839768A (en) * | 1981-09-01 | 1983-03-08 | Sumitomo Electric Ind Ltd | Manufacture of electrically conductive aluminum or aluminum alloy |
-
1983
- 1983-06-28 JP JP11655883A patent/JPS609865A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53125257A (en) * | 1977-04-08 | 1978-11-01 | Kobe Steel Ltd | Extruding method for aluminum alloy containing mg and cu as alloy element at high temperature by hydrostatic pressure |
| JPS55104462A (en) * | 1979-02-01 | 1980-08-09 | Mitsubishi Metal Corp | Oxygen-free copper wire base material |
| JPS5839768A (en) * | 1981-09-01 | 1983-03-08 | Sumitomo Electric Ind Ltd | Manufacture of electrically conductive aluminum or aluminum alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS609865A (en) | 1985-01-18 |
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