JPH06277872A - Brazing method for metallic member having nitrided layer on surface and brazing filler metal for welding used therefor - Google Patents
Brazing method for metallic member having nitrided layer on surface and brazing filler metal for welding used thereforInfo
- Publication number
- JPH06277872A JPH06277872A JP7405793A JP7405793A JPH06277872A JP H06277872 A JPH06277872 A JP H06277872A JP 7405793 A JP7405793 A JP 7405793A JP 7405793 A JP7405793 A JP 7405793A JP H06277872 A JPH06277872 A JP H06277872A
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- Japan
- Prior art keywords
- brazing
- filler metal
- brazing filler
- nitrided layer
- metallic member
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えばワイヤドットプ
リンタの印字レバーなど表面に窒化層を有する金属部材
と印字ワイヤなど他の被接合部材とのろう付け方法及び
これに用いられる溶接用ろう材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing method for a metal member having a nitride layer on the surface thereof such as a printing lever of a wire dot printer and another member to be joined such as a printing wire, and a brazing material for welding used therefor. It is about.
【0002】[0002]
【従来の技術】最近のワイヤドット式プリンタの印字速
度は比躍的に向上し、かつ印字密度も高くなってきてい
るため、印字ヘッドを構成する印字レバーや印字ワイヤ
は高強度かつ高耐摩耗性を備えたものが要求されてい
る。2. Description of the Related Art Recently, the printing speed of wire dot printers has been remarkably improved and the printing density has been increased. Therefore, the printing lever and the printing wire constituting the printing head have high strength and high abrasion resistance. There is a demand for something with the characteristics.
【0003】これらの要求に対応して、印字レバーの素
材は炭素工具鋼,特殊工具鋼やマルエージング鋼等に熱
処理を施し、さらにその表面にNiメッキなどを施した
ものが用いられている。In response to these requirements, the material of the printing lever is carbon tool steel, special tool steel, maraging steel, etc., which is heat-treated, and the surface of which is plated with Ni.
【0004】同様にして、印字ワイヤ材としては、強度
の高いピアノ線や特殊工具鋼材が、高級品には超硬合金
材などが採用されている。Similarly, a high strength piano wire or a special tool steel material is used as a printing wire material, and a cemented carbide material or the like is used as a high-grade product.
【0005】そして、印字レバーと印字ワイヤとの接合
には、主に銀−銅(Ag−Cu)または銀−銅−亜鉛
(Ag−Cu−Zn)を主成分とする強度の高い銀ろう
によるろう付け法が採用されている。[0005] And, for joining the print lever and the print wire, a high-strength silver solder mainly containing silver-copper (Ag-Cu) or silver-copper-zinc (Ag-Cu-Zn) is used. The brazing method is adopted.
【0006】また、印字レバーに戻しばねが接触する部
分などは摩耗が大きくなるため、印字レバーの表面に耐
摩耗性が大きくかつ低コストの窒化層を形成したものを
採用することが試みられている。Further, since the portion where the return spring comes into contact with the print lever is greatly worn, it has been attempted to employ a print lever having a nitride layer formed on the surface thereof, which has high wear resistance and is low in cost. There is.
【0007】[0007]
【発明が解決しようとする課題】ところが、表面に窒化
層を有する金属部材は、耐摩耗性が高くなる反面、部材
の表面付近に生成される反応生成物の凝着抑制作用があ
る。このため、ろう付けの際にも、溶融ろうの表面張力
を大きくし、ろう付けにおいて最も重要な要素となるぬ
れ性を低下させ、接合部における強度を低下させる原因
になっている。However, a metal member having a nitride layer on its surface has a high abrasion resistance, but on the other hand, it has an action of suppressing the adhesion of reaction products generated near the surface of the member. For this reason, during brazing, the surface tension of the molten braze is increased, the wettability, which is the most important factor in brazing, is lowered, and the strength at the joint is lowered.
【0008】具体的に説明すると、図3に示すように、
印字レバー11の端部に被接合部材である印字ワイヤ1
2を接近させた状態で銀ろう材を溶融した溶融ろう13
を付着させても、ろう付け面14は窒化層11aと溶融
ろう13との間での拡散反応などが行なわれず、窒化層
はそのままの状態を維持したものとなる。また、ろう付
け面14における拡散反応が行なわれないと、加熱の際
に発生する気泡13aが溶融ろう中から抜け切れず、気
泡13aが融着ろう中に残留してしまう問題がある。融
着ろう中の気泡13aの存在は、それだけ接合部の面積
を小さくしているため、接合部の強度を低下させる一因
になっている。また、ろう付け面14において、拡散反
応が行なわれないことによって接合面における分子結合
が非常に弱いものとなっており、接合面の強度も低下す
る原因になっている。そのため、表面に窒化層を有する
金属部材としての印字レバーと被接合部材である印字ワ
イヤ等の接合品が得にくくなっている。More specifically, as shown in FIG.
A print wire 1 which is a member to be joined to the end of the print lever 11.
Molten brazing material 13 in which silver brazing material is melted in the state where 2 is brought close to each other 13
Even if the metal is deposited, the brazing surface 14 does not undergo a diffusion reaction or the like between the nitride layer 11a and the molten braze 13, and the nitride layer remains in that state. Further, if the diffusion reaction is not carried out on the brazing surface 14, there is a problem that the bubbles 13a generated at the time of heating cannot be completely removed from the melting brazing and the bubbles 13a remain in the fusion brazing. The presence of the bubbles 13a in the fusion brazing reduces the strength of the joint because it reduces the area of the joint accordingly. Further, in the brazing surface 14, since the diffusion reaction is not performed, the molecular bond in the joint surface is very weak, which causes the strength of the joint surface to decrease. Therefore, it is difficult to obtain a joined product such as a print lever as a metal member having a nitride layer on the surface and a print wire as a joined member.
【0009】こうして、安価で耐摩耗性の高い窒化層を
有する金属部材と他の被接合部材とのろう付け製品の取
得を困難にしているが、この問題は、印字レバーと印字
ワイヤとの接合強度の問題に止まらず、一般の窒化層を
有する部材のろう付け接合に当てはまる問題である。こ
れに対しては、窒化層に対するぬれ性の高いろう材を用
いてこれらの部材同志をろう付けすることを可能にする
ことによって解決できる筈である。Thus, it is difficult to obtain a brazed product of an inexpensive metal member having a nitride layer having high wear resistance and another member to be joined, but this problem is caused by the joining of the printing lever and the printing wire. It is not only a problem of strength but also a problem applicable to general brazing of members having a nitrided layer. This should be solved by making it possible to braze these members using a brazing material having high wettability to the nitrided layer.
【0010】そこで本発明の目的は、表面に窒化層を有
する金属部材と他の被接合部材とのろう付けにおける、
ぬれ性を向上させ得るろう材を提供し、併せてこのろう
材を使用して表面に窒化層を有する金属部材と他の被接
合部材とのろう付けによる接合強度の向上を図ることに
ある。Therefore, an object of the present invention is to braze a metal member having a nitride layer on its surface to another member to be joined,
It is an object of the present invention to provide a brazing material capable of improving the wettability, and at the same time to improve the bonding strength by brazing a metal member having a nitride layer on its surface and another member to be bonded.
【0011】[0011]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明における、表面に窒化層を有する金属部材
と他の部材とをろう付けする溶接用ろう材として、Ag
とCuまたはAgとCuとZnとを主成分とするろう材
に、AlまたはCrまたはAlとCrの両者をそれぞれ
重量割合で0.5〜3%添加したものを採用した。In order to achieve the above object, Ag as a brazing filler metal for brazing a metal member having a nitride layer on its surface and another member in the present invention is used.
A brazing filler metal containing Cu, Ag, Cu, Zn, and Zn as the main components was added with 0.5 to 3% by weight of Al or Cr or both Al and Cr, respectively.
【0012】上記ろう材を用いて、表面に窒化層を有す
る金属部材と他の被接合部材とをろう付けすることによ
り、接合強度の高い接合部を得るようにした。By using the above brazing material, a metal member having a nitride layer on the surface and another member to be joined are brazed to obtain a joined portion having high joining strength.
【0013】[0013]
【作用】上記した手段により、AlまたはCrまたはA
lとCrの両者をそれぞれ重量割合で0.5〜3%添加
することにより、表面に窒化層を有する金属部材に他の
接合部材をろう付けする際に、Al及びCrは溶融ろう
と窒化層との親和力を高くし、窒化層の表面における反
応生成物の凝着抑制作用を弱めるため、溶接用ろう材の
ぬれ性が向上する。By the above means, Al, Cr or A
By adding 0.5 to 3% by weight of both 1 and Cr, respectively, when brazing another joining member to a metal member having a nitrided layer on the surface, Al and Cr form a molten braze and a nitrided layer. To increase the affinity and reduce the effect of suppressing the adhesion of reaction products on the surface of the nitrided layer, so that the wettability of the brazing filler metal for welding is improved.
【0014】上記のろう材を使用して表面に窒化層を有
する金属部材と他の被接合部材とをろう付けすると、接
合面でろう材中のAlまたはCrと窒化層中のNとが反
応して拡散作用を促進し、これによりぬれ性を向上さ
せ、かつ溶融ろう中への気泡の残留を抑え、接合強度を
向上させる。When a metal member having a nitride layer on its surface and another member to be joined are brazed using the above brazing material, Al or Cr in the brazing material reacts with N in the nitride layer at the joining surface. This promotes the diffusion action, thereby improving the wettability, suppressing the bubbles remaining in the molten brazing material, and improving the bonding strength.
【0015】[0015]
【実施例】以下本発明の実施例について図面を参照して
説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0016】本実施例では、図2に示すように、表面に
窒化層を有する金属部材として、ワイヤドット式プリン
タの印字ヘッドを構成する印字レバー1の先端部に、印
字ワイヤ2の一端部近傍を溶融ろう3を介してろう付け
する場合を取り上げる。In this embodiment, as shown in FIG. 2, as a metal member having a nitride layer on the surface, the tip of a print lever 1 which constitutes a print head of a wire dot printer is provided near the one end of a print wire 2. Take the case of brazing the molten metal through the molten braze 3.
【0017】印字レバー1は、窒化用鋼材を所定形状に
形成したものに対し、窒化処理を施して表面に耐摩耗性
の高い窒化層1aを形成してある。また、印字ワイヤ2
は、超硬合金材を採用してある。The print lever 1 is formed by nitriding a nitriding steel material having a predetermined shape and forming a nitriding layer 1a having high wear resistance on the surface. Also, the printing wire 2
Uses a cemented carbide material.
【0018】ろう材としては、一般の金属部材に対して
銀ろう材の中で最もぬれ性がよいとされるBAg−24
(JIS Z 3261)と同一組成のものに、Alを
重量割合で1〜3%添加したものを採用した。As a brazing material, BAg-24, which has the highest wettability among silver brazing materials with respect to general metal members.
A composition having the same composition as (JIS Z 3261) to which Al was added in an amount of 1 to 3% by weight was adopted.
【0019】ろう付け作業は、印字レバー1と印字ワイ
ヤ2とを、ろう付け用治具に取り付け、図1に示すよう
な状態に配置し、高周波加熱装置を用いて約750°C
に加熱して、印字レバー1の先端部に印字ワイヤ2の端
部近傍を接合する。In the brazing operation, the print lever 1 and the print wire 2 are attached to a brazing jig and arranged as shown in FIG. 1, and a high frequency heating device is used to set the temperature to about 750 ° C.
Then, the tip of the print lever 1 is joined to the vicinity of the end of the print wire 2.
【0020】銀ろう中に添加されたAlは、印字レバー
の表面の窒化層中のNと化合し易い性質を有するので、
ろう材が高温である間は、印字レバー1に付着した溶融
ろう3と窒化層1aとの間では盛んな化学反応を起こし
てAlNなどの化合物を作っている。このため、接合面
4は窒化層1aが消滅して母材のFeとろう材3とこの
化合物の入り混った状態となっている。この結果、接合
面の組織は、印字レバー1の内側から順にFeを主成分
とする母材金属、続いてこの母材金属中にAlNの化合
物を含むろう材の組織、さらに続いてAg−Cu−Zn
を主成分とするろう材の組織が徐々に拡散した状態に分
布したものになっている。接合面がこのような組織にな
っているので、窒化層による凝着抑制作用は起こらず、
印字レバー1と溶融ろう3との親和力が高くなる。また
化学反応が盛んに行なわれるために、溶融ろう中に気泡
も残留しなくなるので、強固な接合部が得られる。Since Al added to the silver solder has the property of easily combining with N in the nitride layer on the surface of the print lever,
While the brazing material is at a high temperature, a vigorous chemical reaction occurs between the molten brazing material 3 adhering to the print lever 1 and the nitride layer 1a to form a compound such as AlN. Therefore, the joining surface 4 is in a state where the nitride layer 1a disappears and the base material Fe, the brazing material 3 and this compound are mixed. As a result, the structure of the joint surface is, in order from the inside of the printing lever 1, the base metal containing Fe as the main component, the structure of the brazing filler metal containing the compound of AlN in the base metal, and then Ag-Cu. -Zn
The structure of the brazing filler metal whose main component is is gradually distributed. Since the joint surface has such a structure, the nitride layer does not suppress the adhesion,
The affinity between the print lever 1 and the molten solder 3 is increased. Further, since the chemical reaction is actively carried out, no bubbles remain in the molten brazing material, so that a strong joint can be obtained.
【0021】なお、印字ワイヤ2は、窒化層を有さず、
ぬれ性のよい超硬合金材を使用しているので、接合強度
上の問題は生じない。The printing wire 2 does not have a nitride layer,
Since a cemented carbide material with good wettability is used, no problem in joining strength occurs.
【0022】以上のように、ろう材(BAg−24)に
1%のAlを添加したろう材を用いて、表面に窒化層を
有する金属部材をろう付け接合したものは、Alを全く
添加しないろう材(BAg−24)によってろう付けし
た場合と比較して、約1.5倍の接合強度が得られる。As described above, when a brazing filler metal (BAg-24) containing 1% of Al is used and a metal member having a nitride layer on the surface is brazed and joined, no Al is added. Bonding strength of about 1.5 times is obtained as compared with brazing with a brazing material (BAg-24).
【0023】本実施例で採用したろう材(BAg−2
4)にAlを添加するものの他、AgとCu又はAgと
CuとZnを主成分とする他のろう材中にAlを添加し
たものでも同様に窒化層に対するぬれ性を高くすること
が可能である。The brazing filler metal (BAg-2) used in this embodiment.
In addition to Al added to 4), Al can be added to other brazing materials containing Ag and Cu or Ag, Cu and Zn as the main components, and the wettability to the nitride layer can be similarly enhanced. is there.
【0024】また添加材はAlのほかNと化合物を作り
易いCrも有効であり、本発明のろう材は、Alに代え
てこれもまた窒化層中のNと化合し易いCrを添加した
り、AlとCrとの両者を添加したものでも同様の結果
が得られる。ただし、接合強度を高くできるのは、これ
らの添加量が重量割合で0.5〜3%の範囲に限られ
る。AlやCrの添加量は、0.5%以下ではぬれ性の
向上は不十分であり、3%以上ではAg−Cu(α−
β),またはAg−Cu−Zn(α−β−γ)の固溶体
中にAlやCrが偏析して、逆に接合強度を弱める結果
を生じるので好ましくない。In addition to Al, Cr is also effective as an additive material because it is easy to form a compound with N. In the brazing material of the present invention, instead of Al, Cr, which easily combines with N in the nitride layer, is added. The same result can be obtained by adding both Al, Cr and Cr. However, the bonding strength can be increased only when the addition amount of these is 0.5 to 3% by weight. If the amount of Al or Cr added is 0.5% or less, the improvement of the wettability is insufficient, and if it is 3% or more, Ag-Cu (α-
[beta]) or Ag-Cu-Zn ([alpha]-[beta]-[gamma]) in the solid solution segregates Al and Cr, which results in weakening the bonding strength.
【0025】本実施例では、ろう付け温度を750°C
に設定してあるが、ろう付け温度については、接合母材
及びろう材の性質に応じて適宜最適温度を設定すること
が必要である。また、被接合部材としての印字ワイヤ等
は、超硬合金材に限られず、ピアノ線や特殊工具鋼線製
でも同様の接合強度が得られる。In this embodiment, the brazing temperature is 750 ° C.
However, it is necessary to appropriately set the optimum brazing temperature according to the properties of the joining base material and the brazing material. Further, the printing wire or the like as the member to be joined is not limited to the cemented carbide material, but the same joining strength can be obtained even if it is made of a piano wire or a special tool steel wire.
【0026】なお、本発明は、印字レバーと印字ワイヤ
とのろう付けに限られず、窒化層を有する金属部材のろ
う付け全般に適用可能である。The present invention is not limited to the brazing of the printing lever and the printing wire, but is applicable to general brazing of metal members having a nitride layer.
【0027】[0027]
【発明の効果】以上説明したように、本発明はAgとC
u又はAgとCuとZnを主成分とするろう材中に少量
のAlまたはCrまたはAlとCrとを添加することに
より、表面に窒化層を有する金属部材と他の被接合部材
とをろう付けする際のぬれ性を向上させ、かつ融着ろう
中への気泡の残留を防止可能なろう材が得られる。As described above, according to the present invention, Ag and C are used.
Brazing a metal member having a nitride layer on its surface and another member to be joined by adding a small amount of Al or Cr or Al and Cr into a brazing material containing u or Ag, Cu and Zn as main components. It is possible to obtain a brazing filler metal capable of improving the wettability during the welding and preventing the bubbles from remaining in the fusion brazing solder.
【0028】上記したろう材を用いて、表面に窒化層を
有する金属部材に他の被接合部材をろう付けすれば、非
常に高い接合強度のろう付け製品が得られる。このた
め、耐摩耗性を付与する手段として安価な窒化処理を施
した部材を使用することができるので、印字レバーと印
字ワイヤの接合部品など過酷な条件で使用されるろう付
け製品等を低コストで得ることが可能になる。By brazing another member to be joined to a metal member having a nitride layer on the surface using the above brazing material, a brazed product having a very high joint strength can be obtained. For this reason, it is possible to use inexpensive nitriding-treated members as means for imparting wear resistance, so that it is possible to reduce the cost of brazing products used under harsh conditions such as joining parts of the printing lever and the printing wire. Can be obtained at.
【図1】本発明におけるろう付け状態を示す拡大断面図
である。FIG. 1 is an enlarged sectional view showing a brazing state in the present invention.
【図2】印字レバーの先端部に印字ワイヤをろう付けし
た状態を示す説明図である。FIG. 2 is an explanatory diagram showing a state in which a print wire is brazed to the tip of the print lever.
【図3】従来例におけるろう付け状態を示す拡大断面図
である。FIG. 3 is an enlarged cross-sectional view showing a brazing state in a conventional example.
1 金属部材 1a 窒化層 2 被接合部材 3 ろう材 1 Metal member 1a Nitrided layer 2 Joined member 3 Brazing material
Claims (2)
主成分とするろう材に、AlまたはCrまたはAlとC
rの両者をそれぞれ重量割合で0.5〜3%添加してあ
ることを特徴とする溶接用ろう材。1. A brazing material containing Ag and Cu or Ag, Cu and Zn as main components, and Al or Cr or Al and C.
A brazing filler metal for welding, characterized in that both of r are added in a weight ratio of 0.5 to 3%.
面に窒化層を有する金属部材と他の被接合部材とをろう
付けすることを特徴とする表面に窒化層を有する金属部
材のろう付け方法。2. A metal member having a nitride layer on the surface, which comprises brazing a metal member having a nitride layer on the surface and another member to be joined by using the brazing material according to claim 1. Brazing method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7405793A JPH06277872A (en) | 1993-03-31 | 1993-03-31 | Brazing method for metallic member having nitrided layer on surface and brazing filler metal for welding used therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7405793A JPH06277872A (en) | 1993-03-31 | 1993-03-31 | Brazing method for metallic member having nitrided layer on surface and brazing filler metal for welding used therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06277872A true JPH06277872A (en) | 1994-10-04 |
Family
ID=13536187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7405793A Pending JPH06277872A (en) | 1993-03-31 | 1993-03-31 | Brazing method for metallic member having nitrided layer on surface and brazing filler metal for welding used therefor |
Country Status (1)
Country | Link |
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JP (1) | JPH06277872A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5365219A (en) * | 1976-11-25 | 1978-06-10 | Tokuriki Honten Kk | Silver solder alloy |
JPS58215293A (en) * | 1982-06-07 | 1983-12-14 | Mitsubishi Metal Corp | Hard silver brazing material for embedding and brazing of sintered carbide tool |
JPH01259547A (en) * | 1988-04-08 | 1989-10-17 | Sumitomo Electric Ind Ltd | Component for semiconductor device |
JPH0288482A (en) * | 1988-09-26 | 1990-03-28 | Hitachi Ltd | Method for metallizing or joining ceramics |
-
1993
- 1993-03-31 JP JP7405793A patent/JPH06277872A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5365219A (en) * | 1976-11-25 | 1978-06-10 | Tokuriki Honten Kk | Silver solder alloy |
JPS58215293A (en) * | 1982-06-07 | 1983-12-14 | Mitsubishi Metal Corp | Hard silver brazing material for embedding and brazing of sintered carbide tool |
JPH01259547A (en) * | 1988-04-08 | 1989-10-17 | Sumitomo Electric Ind Ltd | Component for semiconductor device |
JPH0288482A (en) * | 1988-09-26 | 1990-03-28 | Hitachi Ltd | Method for metallizing or joining ceramics |
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