JPH0356306B2 - - Google Patents
Info
- Publication number
- JPH0356306B2 JPH0356306B2 JP62225729A JP22572987A JPH0356306B2 JP H0356306 B2 JPH0356306 B2 JP H0356306B2 JP 62225729 A JP62225729 A JP 62225729A JP 22572987 A JP22572987 A JP 22572987A JP H0356306 B2 JPH0356306 B2 JP H0356306B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- chromium carbide
- carbide layer
- diameter
- quenching
- 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 - Lifetime
Links
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims description 23
- 229910003470 tongbaite Inorganic materials 0.000 claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 238000010791 quenching Methods 0.000 claims description 13
- 230000000171 quenching effect Effects 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000005496 tempering Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 26
- 239000011651 chromium Substances 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- 229910001315 Tool steel Inorganic materials 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/235—Print head assemblies
- B41J2/25—Print wires
Landscapes
- Impact Printers (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はドツトインパクト式の印字ヘツドに用
いられる印字ワイヤに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing wire used in a dot impact type printing head.
［従来の技術］
ドツトインパクト式の印字ヘツドに用いられる
印字ワイヤは、その性質上、耐摩耗性、靱性およ
び耐熱性に優れたものか要求されるため、従来は
印字ワイヤの材料として超硬合金、高速度工具
鋼、タングステンなど用いて形成していた。[Prior Art] The printing wire used in dot impact printing heads is required to have excellent abrasion resistance, toughness, and heat resistance. , high-speed tool steel, tungsten, etc.
［発明が解決しようとする問題点］
しかし、超硬合金によるものは脆くまた高価で
あり、高速度工具鋼によるものは硬度が不足する
ため摩耗し易く耐久上問題がある。またタングス
テンによるものは、重いためプリンタの高速化を
図る上で問題があるなど、いずれも印字ワイヤと
して要求される条件を十分に満すものではなかつ
た。[Problems to be Solved by the Invention] However, tools made of cemented carbide are brittle and expensive, and tools made of high-speed tool steel lack hardness and are prone to wear, resulting in durability problems. Moreover, wires made of tungsten are heavy, which poses problems in increasing the speed of printers, and none of them fully satisfies the requirements for printing wires.
そこで本発明の目的は、耐摩耗性、靱性および
耐熱性に優れた軽量な印字ワイヤを容易にかつ低
コストにて製造することにある。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to easily produce a lightweight printing wire with excellent wear resistance, toughness, and heat resistance at low cost.
［問題点を解決するための手段］
本発明の特徴は、鉄鋼材料にて形成した直径
0.2〜0.3mmのワイヤに浸炭処理を施して上記ワイ
ヤ内の炭素含有量を1.2〜1.5重量パーセントと
し、ワイヤの直径が0.2mmのとき５〜10μｍ、ワイ
ヤの直径が0.3mmのとき５〜13μｍ程度の厚さの炭
化クロム層を、ワイヤの表面に形成する拡散処理
を施し、この炭化クロム層の形成により、ワイヤ
内の炭素含有量を0.6〜1.0重量パーセントに低減
せしめ、しかる後、ワイヤに焼入れ焼きもどし処
理を施すところにある。[Means for solving the problems] The feature of the present invention is that the diameter
A 0.2 to 0.3 mm wire is carburized to make the carbon content in the wire 1.2 to 1.5 weight percent, and when the wire diameter is 0.2 mm, it is 5 to 10 μm, and when the wire diameter is 0.3 mm, it is 5 to 13 μm. A diffusion treatment is performed to form a chromium carbide layer with a certain thickness on the surface of the wire, and the formation of this chromium carbide layer reduces the carbon content in the wire to 0.6 to 1.0 weight percent. This is where the quenching and tempering process is applied.
［作用］
浸炭処理によつてワイヤ内の炭素含有量を1.2
〜1.5重量パーセントとした後、ワイヤの表面に
炭化クロム層を形成する拡散処理を施すことによ
つて、ワイヤの表面に表面硬化層が形成され、そ
れによつて所定の摩耗性が得られる。このとき、
ワイヤ内の窒素含有量は0.6〜1.0重量パーセント
に低減し、内部組織は焼入れ焼もどし処理を施す
ことが可能なパーライト組織となる。その後、焼
入れ焼きもどし処理を施してワイヤの内部組織を
均一な焼もどしマルテンサイト組織とし、靱性を
付与することができる。。[Effect] Carbon content in the wire is reduced to 1.2 by carburizing treatment.
~1.5 weight percent and then subjected to a diffusion treatment to form a chromium carbide layer on the surface of the wire, thereby forming a surface hardening layer on the surface of the wire, thereby providing the desired abrasion properties. At this time,
The nitrogen content in the wire is reduced to 0.6 to 1.0 weight percent, and the internal structure becomes a pearlite structure that can be quenched and tempered. Thereafter, a quenching and tempering process is performed to make the internal structure of the wire a uniform tempered martensitic structure, thereby imparting toughness. .
また炭化クロムは他の金属炭化物に比べ鉄鋼材
料との結合性に優れているため、焼入れ焼きもど
し処理後もワイヤの表面から剥離せず、強固に結
合し、十分な耐摩耗性を維持することができる。 In addition, chromium carbide has better bonding properties with steel materials than other metal carbides, so it does not peel off from the wire surface even after quenching and tempering, and it remains strongly bonded and maintains sufficient wear resistance. I can do it.
またワイヤの母材としては鉄鋼材料を用いてい
るため、タングステンワイヤなどに比べて軽量で
ある。 Furthermore, since steel is used as the base material of the wire, it is lighter than tungsten wire or the like.
［実施例］
以下、図面を参照しつつ本発明の実施例につい
て説明する。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
本実施例ではワイヤ１の材料として直径0.3mm
の硬鋼線を用いた。そして先ず、ワイヤ１を粉末
炭素中に埋没させ、1000℃で２時間の加熱処理を
施す固体浸炭処理によつてワイヤ１の含有炭素量
を1.2〜1.5パーセント程度に上昇させた。 In this example, the material of wire 1 is 0.3 mm in diameter.
hard steel wire was used. First, the wire 1 was immersed in powdered carbon and subjected to a solid carburizing treatment in which the wire was heated at 1000° C. for 2 hours to increase the amount of carbon contained in the wire 1 to about 1.2 to 1.5 percent.
その後、ワイヤ１を粉末クロムと触媒としての
粉末塩化アンモニウムとをほぼ10：１の割合で混
合させた混合液中に埋没させ、1000℃で0.75時間
の加熱処理を施す拡散処理を施した。これにより
第１図に示すようにワイヤ１の表面に表面硬化層
としての炭化クロム層２が約10μｍの層厚をもつ
て析出する。そしてこの炭化クロム層２を析出さ
せることにより、ワイヤ１内の炭素を消費させ、
ワイヤ１内の炭素含有量を0.8重量パーセント程
度とした。なお第１図に示すように炭化クロム層
２形成後のワイヤ１の内部組織はパーライト組織
となつている。 Thereafter, the wire 1 was immersed in a mixture of powdered chromium and powdered ammonium chloride as a catalyst in a ratio of approximately 10:1, and was subjected to a diffusion treatment by heating at 1000° C. for 0.75 hours. As a result, as shown in FIG. 1, a chromium carbide layer 2 as a surface hardening layer is deposited on the surface of the wire 1 to a thickness of about 10 μm. By depositing this chromium carbide layer 2, the carbon in the wire 1 is consumed,
The carbon content in the wire 1 was approximately 0.8% by weight. As shown in FIG. 1, the internal structure of the wire 1 after the chromium carbide layer 2 is formed is a pearlite structure.
またＸ線回析の結果、炭化クロム層２は外層側
から順にCr23C6、Cr7C3、Cr3C2の組成のものが
層状に析出しているのが確認され、その表面硬度
はマイクロビツカース硬度1500Hv〜2000Hvが得
られた。 In addition, as a result of X-ray diffraction, it was confirmed that the chromium carbide layer 2 had a composition of Cr 23 C 6 , Cr 7 C 3 , and Cr 3 C 2 precipitated in a layered manner from the outer layer side, and its surface hardness A microvits hardness of 1500Hv to 2000Hv was obtained.
その後、850℃に加熱して油冷することによつ
て焼入れ処理を施した後、400℃で0.5時間の焼も
どし処理を施した。その結果、第２図に示すよう
にワイヤ１の内部組織を均一な焼きもどしマルテ
ンサイト組織とすることができた。そしてワイヤ
１の内部硬度はマイクロビツカース硬度450Hv〜
500Hvが得られ、所望の靱性が得られた。 Thereafter, a quenching treatment was performed by heating to 850°C and oil cooling, followed by a tempering treatment at 400°C for 0.5 hours. As a result, the internal structure of the wire 1 could be made into a uniform tempered martensitic structure as shown in FIG. And the internal hardness of wire 1 is microvits hardness 450Hv ~
500Hv was obtained, and the desired toughness was obtained.
またワイヤ１の表面に形成された炭化クロム層
２は、焼入れ焼きもどし処理後も安定して強固に
結合しており、表面硬度もマイクロビツカース硬
度1500Hv〜2000Hvが保持された。炭化クロム層
２の安定性は、炭化クロムと鉄鋼材料との結合力
が他の金属炭化物に比べて非常に強いものである
ためと考えられる。 Further, the chromium carbide layer 2 formed on the surface of the wire 1 was stably and firmly bonded even after the quenching and tempering treatment, and the surface hardness was maintained at a micro-Vickers hardness of 1500 Hv to 2000 Hv. The stability of the chromium carbide layer 2 is thought to be due to the fact that the bonding force between chromium carbide and the steel material is very strong compared to other metal carbides.
なお、ワイヤ１の表面に炭化チタン、炭化バナ
ジウムなどの炭化物による表面硬化層を形成した
場合には、焼入れ焼きもどし処理の際に、表面硬
化層が剥離してしまうことが判明した。 It has been found that when a hardened surface layer made of a carbide such as titanium carbide or vanadium carbide is formed on the surface of the wire 1, the hardened surface layer peels off during the quenching and tempering treatment.
第３図はワイヤ１の表面に形成した炭化クロム
層２の層厚とワイヤ１内の炭素含有量との関係を
示すものである。第３図において、実線はワイヤ
１の母材として直径0.3mmの硬鋼線を用いた場合
のデータ、破線は直径0.2mmの硬鋼線を用いた場
合のデータであり、それぞれ浸炭処理後によつて
ワイヤ１内の炭素含有量を1.5重量パーセント程
度としたものである。 FIG. 3 shows the relationship between the thickness of the chromium carbide layer 2 formed on the surface of the wire 1 and the carbon content within the wire 1. In Figure 3, the solid line is the data when a hard steel wire with a diameter of 0.3 mm is used as the base material of wire 1, and the broken line is the data when a hard steel wire with a diameter of 0.2 mm is used. The carbon content in the wire 1 is approximately 1.5% by weight.
第３図から判るように、ワイヤ１内の炭素含有
量を0.6〜1.0重量パーセントとし、焼入れ焼きも
どし処理により、ワイヤ１内部を均一な焼きもど
しマルテンサイト組織にするためには、直径0.3
mmの硬鋼線を用いた場合には炭化クロム層２の層
厚を５〜13μｍにする必要があり、直径0.2mmの硬
鋼線を用いた場合には炭化クロム層２の層厚を５
〜10μｍにする必要がある。 As can be seen from FIG. 3, in order to set the carbon content in the wire 1 to 0.6 to 1.0% by weight and to make the inside of the wire 1 a uniform tempered martensitic structure by quenching and tempering, the diameter is 0.3%.
When using a hard steel wire with a diameter of 0.2 mm, the thickness of the chromium carbide layer 2 must be 5 to 13 μm, and when using a hard steel wire with a diameter of 0.2 mm, the thickness of the chromium carbide layer 2 must be 5 to 13 μm.
It is necessary to make it ~10 μm.
なお炭化クロム層２の層厚を前記の層厚より厚
くなるように形成した場合には、ワイヤ１内の炭
素含有量が0.6重量パーセント以下となるため、
焼入れ焼きもどし処理後のワイヤ１内の組織にフ
エライト相が析出してしまい、十分な硬度を得る
ことができないことが確認された。 In addition, when the layer thickness of the chromium carbide layer 2 is formed to be thicker than the above-mentioned layer thickness, the carbon content in the wire 1 becomes 0.6 weight percent or less.
It was confirmed that a ferrite phase was precipitated in the structure within the wire 1 after the quenching and tempering treatment, and that sufficient hardness could not be obtained.
また炭化クロム層の層厚を前記の層厚より薄く
なるように形成した場合には、ワイヤ１内の炭素
含有量が1.0重量パーセント以上になるため、焼
入れ焼きもどし処理後のワイヤ１内の組織に網目
状の炭化物が析出してしまい、ワイヤ１の母材そ
のものが脆くなり、所望の靱性を得ることができ
ないことが確認された。 Furthermore, if the chromium carbide layer is formed to be thinner than the above-mentioned layer thickness, the carbon content in the wire 1 will be 1.0% by weight or more, so the structure in the wire 1 after quenching and tempering will change. It was confirmed that mesh-like carbides were precipitated in the wire, and the base material of the wire 1 itself became brittle, making it impossible to obtain the desired toughness.
第４図に直径0.3mmのワイヤに10μｍの炭化クロ
ム層を形成した本発明による印字ワイヤの耐久ド
ツト数と摩耗量との関係を示す。 FIG. 4 shows the relationship between the number of durable dots and the amount of wear of a printing wire according to the present invention in which a 10 μm chromium carbide layer is formed on a 0.3 mm diameter wire.
これから判るように、本発明による印字ワイヤ
は、先端コーナー部における摩耗が先端中央部に
比べて早く進展しているが、先端中央部で2.5億
ドツト程度の耐久性を有しており、印字ワイヤの
実用摩耗限界の100μに対しては、３億ドツト以
上の耐久性を示している。また本発明による印字
ワイヤは高速度工具鋼からなる印字ワイヤに比べ
耐久性が優れ、２億ドツト以下のレベルでは、格
段に優れていることが認められる。 As can be seen, the printing wire according to the present invention has a durability of about 250,000,000 dots at the center of the tip, although wear progresses faster at the corner portion of the tip than at the center of the tip. Compared to the practical wear limit of 100μ, it has shown durability of over 300 million dots. It is also recognized that the printing wire according to the present invention has superior durability compared to the printing wire made of high-speed tool steel, and is significantly superior at the level of 200 million dots or less.
またワイヤ１の材料として硬鋼線などの鉄鋼材
料を用いているためタングステンワイヤなどに比
べて軽量であるため、高速印字に適する。 Further, since the wire 1 is made of a steel material such as a hard steel wire, it is lighter than a tungsten wire or the like, making it suitable for high-speed printing.
なお本実施例では、ワイヤ１の材料として硬鋼
線を用いた例を示したが、ワイヤ１の材料は硬鋼
線に限定されるものではなく、例えばピアノ線あ
るいは一般の低炭素工具鋼などによる線材などを
用いてもよい。なお通常は、0.2〜0.3mm程度の細
線を加工性よく形成するため、炭素含有率が0.8
重量パーセント以下の炭素鋼が用いられる。また
粉末クロムと粉末塩化アンモニウムとの混合比、
各熱処理条件などは適宜選択可能である。 Although this embodiment shows an example in which hard steel wire is used as the material of the wire 1, the material of the wire 1 is not limited to hard steel wire, and may be, for example, piano wire or general low carbon tool steel. You may also use a wire rod according to the above. Note that carbon content is usually 0.8 to form fine wires of about 0.2 to 0.3 mm with good workability.
Less than weight percent carbon steel is used. Also, the mixing ratio of powdered chromium and powdered ammonium chloride,
Each heat treatment condition etc. can be selected as appropriate.
［発明の効果］
以上に詳細に説明したように、本発明によれ
ば、表面硬化層を形成した後、焼入れ焼きもどし
処理を施すことにより、ワイヤの内部を靱性に富
む均一な焼きもどしマルテンサイト組織とするこ
とができ、かつ焼入れ焼きもどし処理後も表面硬
化層が安定して形成されているため、耐摩耗性お
よび靱性に優れた軽量な印字ワイヤを容易にかつ
低コストにて製造することができ、産業上極めて
有効である。[Effects of the Invention] As described above in detail, according to the present invention, after forming a surface hardening layer, quenching and tempering treatment is performed to form a uniform tempered martensite with high toughness inside the wire. As the hardened surface layer is stably formed even after quenching and tempering, lightweight printing wires with excellent wear resistance and toughness can be manufactured easily and at low cost. It is extremely effective industrially.
図面は本発明の一実施例に関するものであつ
て、第１図は炭化クロム層を析出せしめた後のワ
イヤの先端部の断面を示す顕微鏡写真、第２図は
焼入れ焼きもどし処理後のワイヤの先端部の断面
を示す顕微鏡写真、第３図は炭化クロム層の層厚
と炭化クロム層形成後のワイヤ内の炭素含有量と
の関係図、第４図は耐久ドツト数と先端部の摩耗
量との関係図である。
１……印字ワイヤ、２……炭化クロム層。
The drawings relate to one embodiment of the present invention, in which Fig. 1 is a micrograph showing a cross section of the tip of the wire after the chromium carbide layer has been deposited, and Fig. 2 is a micrograph showing the cross section of the wire after quenching and tempering. A micrograph showing a cross section of the tip, Figure 3 is a relationship between the thickness of the chromium carbide layer and the carbon content in the wire after the chromium carbide layer is formed, and Figure 4 is the number of durable dots and the amount of wear at the tip. FIG. 1...Printing wire, 2...Chromium carbide layer.
Claims (1)
ヤに浸炭処理を施して上記ワイヤの炭素含有量を
1.2〜1.5重量パーセントとし、 ワイヤの直径が0.2mmのとき５〜10μｍ、ワイヤ
の直径が0.3mmのとき５〜13μｍ程度の厚さの炭化
クロム層を、上記ワイヤの表面に形成する拡散処
理を施し、 上記炭化クロム層の形成により、上記ワイヤ内
の炭素含有量を0.6〜1.0重量パーセントに低減せ
しめ、 しかる後、上記ワイヤに焼入れ焼きもどし処理
を施す ことを特徴とする印字ワイヤの製造方法。[Claims] 1. A wire with a diameter of 0.2 to 0.3 mm made of a steel material is carburized to reduce the carbon content of the wire.
A diffusion treatment is performed to form a chromium carbide layer of 1.2 to 1.5 weight percent on the surface of the wire, with a thickness of 5 to 10 μm when the wire diameter is 0.2 mm, and 5 to 13 μm when the wire diameter is 0.3 mm. A method for manufacturing a printing wire, comprising: reducing the carbon content in the wire to 0.6 to 1.0 weight percent by forming the chromium carbide layer, and then subjecting the wire to a quenching and tempering treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22572987A JPS6468462A (en) | 1987-09-09 | 1987-09-09 | Production of setting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22572987A JPS6468462A (en) | 1987-09-09 | 1987-09-09 | Production of setting wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6468462A JPS6468462A (en) | 1989-03-14 |
| JPH0356306B2 true JPH0356306B2 (en) | 1991-08-27 |
Family
ID=16833907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22572987A Granted JPS6468462A (en) | 1987-09-09 | 1987-09-09 | Production of setting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6468462A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5124985A (en) * | 1974-08-25 | 1976-02-28 | Toyoda Machine Works Ltd | |
| JPS5312759A (en) * | 1976-07-22 | 1978-02-04 | Nippon Telegraph & Telephone | Method of fabricating dot printer wire |
| JPS5711950A (en) * | 1980-06-25 | 1982-01-21 | Kureha Chem Ind Co Ltd | Peptide and its synthesis |
| JPS57134551A (en) * | 1981-02-14 | 1982-08-19 | Sumitomo Metal Ind Ltd | Manufacture of corrosion resistant steel pipe with superior workability and high temperature strength |
-
1987
- 1987-09-09 JP JP22572987A patent/JPS6468462A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5124985A (en) * | 1974-08-25 | 1976-02-28 | Toyoda Machine Works Ltd | |
| JPS5312759A (en) * | 1976-07-22 | 1978-02-04 | Nippon Telegraph & Telephone | Method of fabricating dot printer wire |
| JPS5711950A (en) * | 1980-06-25 | 1982-01-21 | Kureha Chem Ind Co Ltd | Peptide and its synthesis |
| JPS57134551A (en) * | 1981-02-14 | 1982-08-19 | Sumitomo Metal Ind Ltd | Manufacture of corrosion resistant steel pipe with superior workability and high temperature strength |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6468462A (en) | 1989-03-14 |
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