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JPH0130903B2 - - Google Patents
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JPH0130903B2 - - Google Patents

Info

Publication number
JPH0130903B2
JPH0130903B2 JP59202475A JP20247584A JPH0130903B2 JP H0130903 B2 JPH0130903 B2 JP H0130903B2 JP 59202475 A JP59202475 A JP 59202475A JP 20247584 A JP20247584 A JP 20247584A JP H0130903 B2 JPH0130903 B2 JP H0130903B2
Authority
JP
Japan
Prior art keywords
wire
less
symbol
printing
toughness
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
Application number
JP59202475A
Other languages
Japanese (ja)
Other versions
JPS6179720A (en
Inventor
Kozaburo Unno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PURASU ENJINIARINGU KK
Original Assignee
PURASU ENJINIARINGU KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PURASU ENJINIARINGU KK filed Critical PURASU ENJINIARINGU KK
Priority to JP59202475A priority Critical patent/JPS6179720A/en
Publication of JPS6179720A publication Critical patent/JPS6179720A/en
Publication of JPH0130903B2 publication Critical patent/JPH0130903B2/ja
Granted legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/06Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Impact Printers (AREA)
  • Heat Treatment Of Steel (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

(発明の利用分野) 本発明は、ドツト・プリンター用印字ワイヤー
に係り、極細線とするための伸線加工が非常に容
易であり、また熱処理も簡単で、しかも強靭性に
優れたドツト・プリンター用印字ワイヤーに関す
るものである。 (従来技術) ドツト・プリンターは複数本のプリントワイヤ
ーを作動して所定の文字或いは数字を印字するも
ので、その印字速度が非常に速いという特徴を有
している。プリントワイヤーとしては、耐摩耗性
が大きく、しかも強靭であり、疲労強度が大きい
こと、伸線加工並びに熱処理の簡単なこと、及び
耐食性の良好なことが要求される。 プリントワイヤーには、タングステン線及び高
速度鋼線の焼入極細線が使用されている。タング
ステン線は温間または冷間で伸線されたもので、
強度の加工によつて著しいフアイバー組織を示し
ており、使用中にフアイバーに沿つて縦割れ(裂
け)が発生しやすい。また、その硬さは加工硬化
を主体としたもので、硬さのバラツキも大きく品
質が不安定である。 また、高速度鋼線は、引抜伸線を繰返して極細
線としたワイヤーをそのまま焼入れ、焼戻したの
ち、切断して製造されるが、高速度鋼を極細線と
するために長い引抜伸線工程を必要とするため、
価格が高くなる欠点がある。また耐摩耗性は優れ
ているが靭性が不足気味で折損を生ずることがあ
る。 (技術的課題) 本発明は、これらの問題に鑑みてなされたもの
であり、極細線とするための伸線加工が非常に容
易であり、また硬化熱処理が簡単であり、しかも
靭性の優れたドツト・プリンター用印字ワイヤー
を提供することを目的とする。 (技術的手段) 即ち、本発明はC0.03%以下、Si0.10%以下、
Mn0.10%以下、Ni12.0〜14.0%、Mo9.0〜11.0
%、Co13.0〜16.0%、Al0.01〜0.50%、Ti0.1〜
0.5%、残部鉄及び不純物を含む鋼よりなるドツ
ト・プリンター用ワイヤーであり、前記組成の鋼
の圧延コイルを、約1050℃に加熱して水冷する溶
体化処理を行なつたのち、減面率約80%まで伸
線、ついで溶体化処理を行ない、引続き約80%減
面率の伸線を行なうという工程を繰返して直径を
細くし、最後に減面率約80%の伸線加工を施し
て、直径0.3mm前後の所定の寸法のワイヤーとし
たのち、480℃前後で3h(時間)前後の時効処理
を行なつて、Hv740以上に析出硬化させることで
製造される。 次に、本発明ドツト・プリンター用印字ワイヤ
ーの組成限定理由を述べる。Cは低炭素マルテン
サイトの靭性を害するので0.03%以下とした。Si
及びMnは脱酸効果を有するが、0.1%をこえると
靭性を低下するので、それぞれ0.1%以下とした。
Niはマルテンサイト組織とするために必要であ
り、またマルテンサイトを時効温度まで安定させ
るのに必要であるが、12%未満ではその効果少な
く、また14%をこえると残留オーステナイトがあ
らわれるので12.0〜14.0%とした。Moは金属間
化合物をつくり、時効処理によつて析出硬化を生
ずるのに必要であるが、9%未満ではその効果少
なく、また11%をこえると靭性を低下するので、
9.0〜11.0%に限定した。CoはMoによる析出硬化
を促進させる効果を有するが、13.0%未満ではそ
の効果少なく、また16.0%をこえても効果の向上
が小さいので13.0%〜16.0%とした。Alは脱酸剤
として添加し、また時効硬化性を改善するが、
0.01%未満ではその効果少なく、また0.50%をこ
えると靭性を低下するので、0.01〜0.50%とし
た。Tiは金属間化合物Ni3Tiを形成し、時効硬化
を生ずるのに必要であるが0.1%未満ではその効
果少なく、また0.5%をこえると靭性を低下する
ので0.1〜0.5%とした。本組成の鋼は、溶体化処
理、即ち、約1050℃から空冷または水冷すること
によつて、組織は低炭素マルテンサイトとなり、
硬さはHRC32〜36と比較的軟らかいので、引抜伸
線加工が容易であり、中間の溶体化処理なしで減
面率約80%までの冷間引抜伸線が可能である。ま
た溶体化処理後、480℃に3h(時間)加熱する時
効処理によつて低炭素マルテンサイト基質に微細
な金属間化合物が析出してHv720前後に析出硬化
する。 (作用) 本発明に係る組成の鋼は、冷間伸線後、時効処
理を行なうと析出硬化が促進される。即ち、1050
℃から溶体化処理後、70%減面率の冷間伸線を行
ない、引続き480℃×3h(時間)の時効処理を行
なうと、Hv750〜770の硬さに析出硬化すること
ができるので、印字ワイヤーとして充分な硬さを
有するといえる。 (実施例及び効果) 次に本発明を実施例によつて説明するが本発明
はこれに限定されるわけではない。第1表は本発
明に係る印字用ワイヤーSKH9製ワイヤーの化学
組成を示す。
(Field of Application of the Invention) The present invention relates to a printing wire for dot printers, which is extremely easy to draw into ultra-fine wires, easily heat-treated, and has excellent toughness. This relates to printing wire for use in printing. (Prior Art) A dot printer prints predetermined characters or numbers by operating a plurality of print wires, and is characterized by its extremely fast printing speed. Printed wires are required to have high abrasion resistance, high toughness, high fatigue strength, easy wire drawing and heat treatment, and good corrosion resistance. The print wire is made of tungsten wire or high-speed steel wire that has been hardened. Tungsten wire is drawn either warm or cold.
It exhibits a remarkable fiber structure due to intense processing, and vertical cracks (splits) are likely to occur along the fibers during use. In addition, its hardness is mainly due to work hardening, and its quality is unstable due to large variations in hardness. In addition, high-speed steel wire is manufactured by repeatedly drawing and drawing the wire to make it into an ultra-fine wire, then quenching and tempering the wire as it is, then cutting it. Because it requires
The disadvantage is that the price is high. Although it has excellent wear resistance, it lacks toughness and may break. (Technical Issues) The present invention has been made in view of these problems, and it is very easy to draw a wire to make an ultra-fine wire, easy to harden heat treatment, and have excellent toughness. The purpose is to provide printing wire for dot printers. (Technical means) That is, the present invention has C0.03% or less, Si0.10% or less,
Mn 0.10% or less, Ni 12.0-14.0%, Mo 9.0-11.0
%, Co13.0~16.0%, Al0.01~0.50%, Ti0.1~
This is a wire for dot printers made of steel containing 0.5% iron and impurities, with the balance being iron and impurities.A rolled coil of steel with the above composition is heated to approximately 1050°C and then water-cooled to form a solution treatment. The wire is drawn to approximately 80%, then subjected to solution treatment, followed by wire drawing with an area reduction of approximately 80%, to make the diameter thinner, and finally wire drawn with an area reduction of approximately 80%. After that, the wire is made into a wire with a predetermined size of around 0.3 mm in diameter, and then subjected to aging treatment at around 480°C for around 3 hours (hours) to precipitation harden it to Hv740 or higher. Next, the reasons for limiting the composition of the printing wire for dot printers of the present invention will be described. Since C impairs the toughness of low carbon martensite, it is set at 0.03% or less. Si
Although Mn and Mn have a deoxidizing effect, if the content exceeds 0.1%, the toughness decreases, so each content was set to 0.1% or less.
Ni is necessary to create a martensitic structure and to stabilize martensite up to the aging temperature, but if it is less than 12%, the effect will be small, and if it exceeds 14%, retained austenite will appear, so 12.0~ It was set at 14.0%. Mo is necessary to create intermetallic compounds and cause precipitation hardening through aging treatment, but if it is less than 9%, the effect will be small, and if it exceeds 11%, the toughness will decrease.
Limited to 9.0-11.0%. Co has the effect of accelerating precipitation hardening due to Mo, but if it is less than 13.0%, the effect is small, and if it exceeds 16.0%, the improvement in the effect is small, so it was set at 13.0% to 16.0%. Al is added as a deoxidizing agent and also improves age hardenability, but
If it is less than 0.01%, the effect will be small, and if it exceeds 0.50%, the toughness will decrease, so it was set at 0.01 to 0.50%. Ti is necessary to form the intermetallic compound Ni 3 Ti and cause age hardening, but if it is less than 0.1%, its effect will be small, and if it exceeds 0.5%, the toughness will decrease, so it was set at 0.1 to 0.5%. Steel with this composition is solution-treated, that is, air-cooled or water-cooled from about 1050°C, so that the structure becomes low-carbon martensite.
Since the hardness is relatively soft with H R C 32 to 36, it is easy to draw and draw, and cold drawing with an area reduction of up to about 80% is possible without intermediate solution treatment. After the solution treatment, fine intermetallic compounds are precipitated in the low carbon martensite matrix by aging treatment, which is heated to 480°C for 3 hours, and precipitation hardens to around Hv720. (Function) When the steel having the composition according to the present invention is subjected to an aging treatment after cold wire drawing, precipitation hardening is promoted. i.e. 1050
After solution treatment at ℃, cold wire drawing with a 70% area reduction rate and subsequent aging treatment at 480℃ for 3 hours (hours) will result in precipitation hardening to a hardness of Hv750 to 770. It can be said that it has sufficient hardness as a printing wire. (Examples and Effects) Next, the present invention will be explained using Examples, but the present invention is not limited thereto. Table 1 shows the chemical composition of the printing wire SKH9 wire according to the present invention.

【表】 記号Aは本発明に係る印字ワイヤーを示し、記
号BはSKH9製印字ワイヤーを示す。 記号BのSKH9は、中間焼鈍なしに冷間引抜伸
線できるのは減面率30〜40%であるので、SKH9
の5.5mmφコイルから、0.3mmφワイヤーまで引抜
伸線するのに必要な中間焼鈍は12〜16回である。
これに対し、記号Aを構成する鋼は、減面率80%
までは中間溶体化なしに伸線可能であるので、
5.5mmφコイルから0.3mmφワイヤーまで引抜伸線
するのに必要な中間溶体化は、僅か5回である。
このように記号Aを構成する鋼は伸線加工性が優
れている。 次に、第2表は、0.3mmφのドツト・プリンタ
ー用印字ワイヤーの熱処理条件と硬さ、及びプリ
ントワイヤーとして106回槌打した場合の折損率
を示す。
[Table] Symbol A indicates a printing wire according to the present invention, and symbol B indicates a printing wire made of SKH9. SKH9 with symbol B can be cold drawn and drawn without intermediate annealing with an area reduction rate of 30 to 40%, so SKH9
The intermediate annealing required to draw from a 5.5 mmφ coil to a 0.3 mmφ wire is 12 to 16 times.
On the other hand, the steel constituting symbol A has an area reduction rate of 80%.
It is possible to draw wire without intermediate solution treatment up to
Only 5 intermediate solution treatments are required to draw wire from a 5.5 mmφ coil to a 0.3 mmφ wire.
As described above, the steel having the symbol A has excellent wire drawability. Next, Table 2 shows the heat treatment conditions and hardness of a 0.3 mmφ printing wire for a dot printer, and the breakage rate when the printing wire is hammered 10 6 times.

【表】 即ち、記号Aは、1050℃溶体化処理後80%減面
率の冷間伸線を行なつて0.3mmφとしたのち、480
℃×3h(時間)の時効処理をして、Hv770に析出
硬化させたものである。この記号Aと記号Bのプ
リントワイヤーを106回槌打試験した結果、記号
Bの折損率が15%であつたのに対し、記号Aは折
損率0%であり、本発明ワイヤーが強靭性に優れ
ていることがわかる。また耐摩耗性も記号Aは記
号Bとほぼ同等に良好である。 以上説明したように、本発明はC0.03%以下、
Si0.10%以下、Mn0.10%以下、Ni12.0〜14.0%、
Mo9.0〜11.0%、Co13.0〜16.0%、Al0.01〜0.50
%、Ti0.1〜0.5%残部鉄及び不純物を含む鋼より
なるドツト・プリンター用印字ワイヤーであり、
強靭性並びに耐摩耗性の優れた性能を有するもの
である。
[Table] Namely, symbol A is a 480 mm diameter wire that is 480
It was precipitated and hardened to Hv770 by aging treatment at ℃ x 3h (hours). As a result of the hammering test of the printed wires with symbols A and B 106 times, the breakage rate of symbol B was 15%, while the breakage rate of symbol A was 0%. It can be seen that it is excellent. In addition, the wear resistance of symbol A is almost as good as symbol B. As explained above, the present invention has C0.03% or less,
Si0.10% or less, Mn0.10% or less, Ni12.0~14.0%,
Mo9.0~11.0%, Co13.0~16.0%, Al0.01~0.50
%, Ti 0.1~0.5%, the balance is iron and steel containing impurities, and is a dot printer printing wire.
It has excellent toughness and wear resistance.

Claims (1)

【特許請求の範囲】[Claims] 1 重量%で、C0.03%以下、Si0.10%以下、
Mn0.10%以下、Ni12.0〜14.0%、Mo9.0〜11.0
%、Co13.0〜16.0%、Al0.01〜0.50%、Ti0.1〜
0.5%、残部鉄及び不純物を含む鋼よりなる強靭
性の優れたドツト・プリンター用印字ワイヤー。
1% by weight, C0.03% or less, Si0.10% or less,
Mn 0.10% or less, Ni 12.0-14.0%, Mo 9.0-11.0
%, Co13.0~16.0%, Al0.01~0.50%, Ti0.1~
Printing wire for dot printers with excellent toughness, made of steel containing 0.5% iron and impurities.
JP59202475A 1984-09-27 1984-09-27 Printing wire for dot printer Granted JPS6179720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59202475A JPS6179720A (en) 1984-09-27 1984-09-27 Printing wire for dot printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59202475A JPS6179720A (en) 1984-09-27 1984-09-27 Printing wire for dot printer

Publications (2)

Publication Number Publication Date
JPS6179720A JPS6179720A (en) 1986-04-23
JPH0130903B2 true JPH0130903B2 (en) 1989-06-22

Family

ID=16458129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59202475A Granted JPS6179720A (en) 1984-09-27 1984-09-27 Printing wire for dot printer

Country Status (1)

Country Link
JP (1) JPS6179720A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2537679B2 (en) * 1989-02-27 1996-09-25 日新製鋼株式会社 High-strength stainless steel and its steel material

Also Published As

Publication number Publication date
JPS6179720A (en) 1986-04-23

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