JPH01154883A - Electrode for resistance welding - Google Patents
Electrode for resistance weldingInfo
- Publication number
- JPH01154883A JPH01154883A JP31205987A JP31205987A JPH01154883A JP H01154883 A JPH01154883 A JP H01154883A JP 31205987 A JP31205987 A JP 31205987A JP 31205987 A JP31205987 A JP 31205987A JP H01154883 A JPH01154883 A JP H01154883A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- alloy
- weight
- resistance welding
- welding
- 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
- 238000003466 welding Methods 0.000 title abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 11
- 229910045601 alloy Inorganic materials 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 5
- 229910052790 beryllium Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 2
- 229910052726 zirconium Inorganic materials 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- WZFUQSJFWNHZHM-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 WZFUQSJFWNHZHM-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical class [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/222—Non-consumable electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Conductive Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は点溶接やシーム溶接等に代表される抵抗溶接用
の電極に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrode for resistance welding, typified by spot welding, seam welding, and the like.
従来、抵抗溶接用の電極材の材質としてクロム鋼が用い
られることが多いが、ステンレス鋼、厚手の鋼板あるい
は表面処理鋼板等を溶接する場合におけるように高加圧
力を要する過酷な溶接条件が必要とされる場合には強度
の強いベリリウム鋼が使用される。このベリリウム銅合
金としてはＣＤＡ番号Ｃ１７５１０で規定されているＢ
ｅ０．２〜０．６重量％、 Ｎｉ１．４〜２．２重量％
、残部ＣｕからなるＮｉ−Ｂｅ−Ｃｕ系合金が多いが、
これにさらにＺｒを０．２〜１．０重量％添加した合金
も用いられている。Conventionally, chromium steel is often used as the electrode material for resistance welding, but harsh welding conditions that require high pressure are required when welding stainless steel, thick steel plates, surface-treated steel plates, etc. In such cases, strong beryllium steel is used. This beryllium copper alloy is B specified by CDA number C17510.
e0.2-0.6% by weight, Ni1.4-2.2% by weight
, there are many Ni-Be-Cu alloys with the balance being Cu, but
An alloy to which 0.2 to 1.0% by weight of Zr is further added is also used.
一般に、抵抗溶接用の電極に要求される特性としては寿
命が長いことが最も重視されることである。寿命が長い
電極とは硬くて強く、熱電導率が良くて溶接熱を受けて
も電極自体の温度が上がらず、変形が起らないものであ
る。Generally, long life is the most important characteristic required of electrodes for resistance welding. An electrode with a long life is one that is hard, strong, and has good thermal conductivity so that even when exposed to welding heat, the temperature of the electrode itself does not rise and deformation does not occur.
しかるに、Ｎｉ−Ｂｅ−Ｃｕ系合金における電極が寿命
に達するのは電極先端の圧潰と電流密度の低下が生ずる
ことが直接の原因となっているものである。However, the fact that the electrode in the Ni-Be-Cu alloy reaches the end of its life is directly caused by the crushing of the electrode tip and the decrease in current density.
本発明者は実際に寿命に至ったＮ１−Ｂｅ−ＣＵ系合金
電極を詳細に検討した結果、電極先端部ではワーク材（
被溶接材）からくる金属元素が電極をなす銅合金中に拡
散して生ずる拡散層や合金層が生成され、あるいは表面
酸化がおこって熱抵抗が増大し、電極先端部の温度を上
げていること、そしてその結果電極先端部は高温下で加
圧力を受けることとなり、先端の圧潰と電流密度の低下
が生じていることを見い出した。As a result of a detailed study of N1-Be-CU alloy electrodes that had actually reached the end of their service life, the inventors found that the workpiece material (
When metal elements from the welded material (material to be welded) diffuse into the copper alloy that makes up the electrode, a diffusion layer or an alloy layer is generated, or surface oxidation occurs, increasing thermal resistance and raising the temperature at the tip of the electrode. It was discovered that as a result, the tip of the electrode was subjected to pressure at high temperatures, causing the tip to collapse and the current density to decrease.
本発明はＮｉ−Ｂｅ−Ｃｕ系合金電極における寿命の原
因となる電極先端の圧潰と電流密度の低下を合金成分組
成を調整することにより解決したものである。The present invention solves the problem of the crushing of the electrode tip and the decrease in current density, which are causes of the lifespan of Ni-Be-Cu alloy electrodes, by adjusting the alloy component composition.
すなわち本発明はＮｉ：０．０５〜２．０重量％、 Ｂ
ｅ：０．１〜０．５重量％、 Ｚｒ：０．０５〜０．５
重量％およびへΩ二０．０５〜１．０重量％を含有し、
残部が不純物を別にしてＣｕからなる合金成分組成で電
極を構成したものである。That is, in the present invention, Ni: 0.05 to 2.0% by weight, B
e: 0.1-0.5% by weight, Zr: 0.05-0.5
% by weight and 0.05 to 1.0% by weight of Ω2,
The electrode is constructed of an alloy composition in which the remainder is Cu, excluding impurities.
次に、本発明電極の各成分組成範囲の限定理由を示す。Next, the reason for limiting the composition range of each component of the electrode of the present invention will be described.
本発明を構成する合金成分のうちＮｉ、 Ｂｅ。Among the alloy components constituting the present invention, Ni and Be.
Ｚｒはそれぞれ強度を向上させる効果があり、それぞれ
が下限未満では強度が十分でなく電極が圧潰しやすい。Each of Zr has the effect of improving strength, and if each is less than the lower limit, the strength is insufficient and the electrode is likely to be crushed.
また、Ｎｉが２．０重量％を越えると熱伝導性が十分で
なくなり、ＢｅおよびＺｒに大きな変化がないため経済
性に劣る。また八〇は被溶接材の構成元素であるＦｅや
Ｚｎ原子が電極をなす銅合金中へ拡散する傾向をＡｌと
これらの元素との間で金属間化合物を形成させるなどし
て抑制し、さらに電極の酸化も抑制するので電極の寿命
を延す効果がある。モしてＡｌが０．０５重量％未満で
はこの効果が発揮されず１゜０重量％を越すと熱伝導性
が劣化してかえって寿命が短くなる。Furthermore, if Ni exceeds 2.0% by weight, thermal conductivity will not be sufficient, and there will be no significant change in Be and Zr, resulting in poor economic efficiency. In addition, 80 suppresses the tendency of Fe and Zn atoms, which are constituent elements of the material to be welded, to diffuse into the copper alloy forming the electrode by forming an intermetallic compound between Al and these elements, and further Since it also suppresses oxidation of the electrode, it has the effect of extending the life of the electrode. However, if Al is less than 0.05% by weight, this effect will not be exhibited, and if it exceeds 1.0% by weight, the thermal conductivity will deteriorate and the life will be shortened.
本発明を構成する銅合金の製造法は、常法により上記成
分組成のインゴットを溶製し、熱間加工して所望の棒や
板として、８００〜９５０℃、好ましくは８５０〜９３
０℃で溶体化処理を行い、必要に応じさらに冷間加工を
加え、さらに４００〜５００℃で時効処理を行うことか
らなる。また電極への加工は通常機械切削法によって行
われる。The method for manufacturing the copper alloy constituting the present invention is to melt an ingot having the above-mentioned composition by a conventional method, hot-work it into a desired bar or plate, and heat it to 800-950°C, preferably 850-930°C.
It consists of solution treatment at 0°C, further cold working if necessary, and further aging treatment at 400 to 500°C. Further, processing into electrodes is usually performed by a mechanical cutting method.
本発明ではＮ ｉ −Ｂ ｅ −Ｃｕ系合金にＡｆｌを
所定量添加含有させたため、このＡｆｌが被溶接材の構
成元素と金属間化合物を形成して銅合金中へこれら構成
元素が拡散することを防止し、同時に酸化も防止し、こ
れにより電極強度並びに電流密度の低下を防止すること
となる。In the present invention, since a predetermined amount of Afl is added to the Ni-Be-Cu alloy, this Afl forms an intermetallic compound with the constituent elements of the material to be welded, and these constituent elements diffuse into the copper alloy. At the same time, it also prevents oxidation, thereby preventing a decrease in electrode strength and current density.
実施例
第１表に示す成分からなる合金のインゴットを溶製し、
熱間押出した。その後９００℃にて溶体化水焼入れした
のち、約５０％の冷間加工を加えたのち、４５０℃にて
時効処理した。得られた棒から機械切削によってドーム
形電極を製造し抵抗溶接実験を行い、寿命を求めた。供
試体は０．８ｍｍ厚の亜鉛鉄板であり、加圧力２５０
ｋｇ、溶接電流９００ＯＡ、通電時間１０サイクルの溶
接条件とした。供試体を溶接後５０点おきにひきはがし
、ナゲツト径が３ 、６ｍｍφ （４ｖ’ｔ）より小と
なった時点を電極の寿命とした。得られた結果を第１表
に示す。なお、寿命と判断された電極は全て先端がつぶ
れ広がっていた。Example An ingot of an alloy consisting of the ingredients shown in Table 1 was melted,
Hot extruded. After that, it was solution water quenched at 900°C, cold worked by about 50%, and then aged at 450°C. A dome-shaped electrode was manufactured from the obtained rod by mechanical cutting, and a resistance welding experiment was conducted to determine its lifespan. The specimen was a galvanized iron plate with a thickness of 0.8 mm, and a pressing force of 250
The welding conditions were: kg, welding current 900OA, and energization time 10 cycles. After welding, the specimen was peeled off every 50 points, and the life of the electrode was defined as the point in time when the nugget diameter became smaller than 3.6 mmφ (4v't). The results obtained are shown in Table 1. Note that the tips of all the electrodes that were judged to have reached the end of their lifespan were crushed and expanded.
（以下余白）
第１表
実施例１ １．５ ０．２７ ０．３１ ０．２０
７００回実施例２ １．２ ０．２０ ０．１４
０．３１ ６５０回実施例３．２．０ ０．３５
０．２０ ０．１４ ７００回比較例４ １．
５ ０．２８ ０．３２ − ６００回比較例５
１．８ ０．３１ − − ４００回〔発明
の効果〕
以上のような本発明によれば、強度的には従来品に劣ら
ず、しかも被溶接材との拡散層、合金層の形成が抑制さ
れる電極材が供給され、電極の寿命が大幅に伸びる抵抗
溶接用電極が得られ、工業的に極めて有用である。(Margin below) Table 1 Example 1 1.5 0.27 0.31 0.20
700 times Example 2 1.2 0.20 0.14
0.31 650 times Example 3.2.0 0.35
0.20 0.14 700 times Comparative Example 4 1.
5 0.28 0.32 - 600 times Comparative example 5
1.8 0.31 - - 400 times [Effects of the Invention] According to the present invention as described above, the strength is not inferior to conventional products, and the formation of a diffusion layer and an alloy layer with the material to be welded is suppressed. As a result, a resistance welding electrode with a significantly extended electrode life can be obtained, which is extremely useful industrially.
Claims (1)
．５重量％、Ｚｒ：０．０５〜０．５重量％およびＡｌ
：０．０５〜１．０重量％を含有し、残部が不純物を別
にしてＣｕからなる抵抗溶接用電極。1, Ni: 0.05-2.0% by weight, Be: 0.1-0
．． 5% by weight, Zr: 0.05-0.5% by weight and Al
:0.05 to 1.0% by weight, with the remainder consisting of Cu, excluding impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31205987A JPH01154883A (en) | 1987-12-11 | 1987-12-11 | Electrode for resistance welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31205987A JPH01154883A (en) | 1987-12-11 | 1987-12-11 | Electrode for resistance welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01154883A true JPH01154883A (en) | 1989-06-16 |
Family
ID=18024729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31205987A Pending JPH01154883A (en) | 1987-12-11 | 1987-12-11 | Electrode for resistance welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01154883A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008229653A (en) * | 2007-03-20 | 2008-10-02 | Sumitomo Electric Ind Ltd | Collar for resistance welding, electrode for resistance welding, and resistance welding method |
-
1987
- 1987-12-11 JP JP31205987A patent/JPH01154883A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008229653A (en) * | 2007-03-20 | 2008-10-02 | Sumitomo Electric Ind Ltd | Collar for resistance welding, electrode for resistance welding, and resistance welding method |
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