JPH0127136B2 - - Google Patents
Info
- Publication number
- JPH0127136B2 JPH0127136B2 JP18481780A JP18481780A JPH0127136B2 JP H0127136 B2 JPH0127136 B2 JP H0127136B2 JP 18481780 A JP18481780 A JP 18481780A JP 18481780 A JP18481780 A JP 18481780A JP H0127136 B2 JPH0127136 B2 JP H0127136B2
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- resistance
- electrical contact
- graphite cast
- contact material
- 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
- 239000000463 material Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000003466 welding Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 229910017937 Ag-Ni Inorganic materials 0.000 description 3
- 229910017984 Ag—Ni Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910017112 Fe—C Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Switches (AREA)
- Contacts (AREA)
Description
本発明はAg−Fe−Ｃ系焼結電気接点材料に関
する。
従来焼結電気接点材料には、銀中にニツケル、
鉄、タングステン、黒鉛を分散させたものが用い
られていた。しかし、タングステン、黒鉛をリレ
ーに用いると、接触圧力が低いためにタングステ
ンの場合は接触抵抗が問題となり、黒鉛の場合は
消耗が著しく、耐絶縁性、耐圧性に問題が生じ
る。したがつて、Ag−Ni、Ag−Feの焼結合金
が多々使用されることになる。
しかし、Ag−NiやAg−Feの場合、Ag−Ｗや
Ag−Ｃで生じなかつた初期溶着が発生し、耐溶
着性に問題が生ずる。
本発明は、かような点に鑑み鋭意攻究の結果な
されたものであり低接触抵抗、耐溶着性、耐消耗
性に富む焼結電気接点材料を提供せんとするもの
である。
本発明による電気接点材料は、
(1) 球状黒鉛鋳鉄５〜30w／ｏとAg70〜95w／
ｏからなる電気接点材料であつて、前記黒鉛鋳
鉄が、C3〜4w／ｏ、Si2〜6w／ｏ、Mn0.2〜
1.5w／ｏ、P0.06〜0.2w／ｏ、Mg0.02〜0.1w／
ｏおよび残部Feよりなる組成を有することを
特徴とする電気接点材料及び
(2) 球状黒鉛鋳鉄５〜30w／ｏとAg70〜95w／
ｏからなる電気接点材料であつて、前記黒鉛鋳
鉄が、C3〜4w／ｏ、Si2〜6w／ｏ、Mn0.2〜
1.5w／ｏ、P0.06〜0.2w／ｏ、Mg0.02〜0.1w／
ｏおよび残部Feよりなる組成のFeの一部を
Ni22w／ｏ以下、Mo1.0w／ｏ以下あるいは
Cr2.5w／ｏ以下で置き換えた組成を有するこ
とを特徴とする電気接点材料である。
本発明に於いて球状黒鉛鋳鉄を用いないで、各
成分の粉末を、Ag粉と混合分散して接点材料と
した場合、所定の形状を得る為の塑性加工性が乏
しく割れ等の障害を生じる。又、接点性能上から
みると、Ｃ自身がAg中に分散しているとAg−グ
ラフアイト接点のように耐消耗性が悪くなる。し
かし、Fe中にＣが分散し、Ag中にFe−Ｃ合金と
して分散している場合は、耐消耗性には問題が発
生せずむしろ接触抵抗を低める効果を呈してい
る。さらにAg−Fe電気接点材料の欠点である初
期溶着の発生を完全に抑えることとなり画期的な
Ag−Fe系電気接点材料の改良となる。
Si、Mn、ＰおよびMgの各元素は、接点性能
上は阻害元素にならない程度のもので、塑性加工
上極めて効果的な元素であり、加工性に富む球状
黒鉛鋳鉄として必須の合金元素である。また、
Ni、MoおよびCrの各元素はFeの一部と置き換
えても接点性能上は阻害元素にならず、上記と同
様な効果を有する任意の添加元素である。
球状黒鉛鋳鉄の高量百分率を５〜30％としたの
は、５％以下では全体のＣ濃度が少なすぎ、接触
抵抗、耐溶着性に効果が現われない。30％以上で
は電気伝導度が低くなりすぎ、これから耐溶着
性、耐消耗性が悪くなる。
次に本発明による複合電気接点材料の効果を明
瞭ならしめる為にその具体的な実施例と従来例に
ついて説明する。
実施例 １
C4.0w／ｏ、Si2.5w／ｏ、Mn0.2w／ｏ、
P0.06w／oMg0.05w／ｏ残Feからなる組成の球
状黒鉛鋳鉄の−100メツシユのアトマイズ粉
10W／ｏとAgの−100メツシユのアトマイズ粉
90w／ｏをＶ型混合機にて混合して2ton／cm2の圧
力にて加圧成形後、H2−N2混合ガス中にて900
℃２時間焼結する。さらに圧力を4ton／cm2、
6ton／cm2、8ton／cm2と高め、各々同じ条件にて焼
結したのち熱間押出加工、伸線加工を経て2.5φmm
の線材となした後ヘツダー加工により頭径5φmm
のリベツト接点となし、固定片と可動片に用い
た。
実施例 ２
C3w／ｏ、Si2w／ｏ、Mn1.5w／ｏ、P0.2w／
ｏ、Ni22w／ｏ、Mo0.5w／ｏ、Cr2.0w／ｏ、
Mg0.05w／ｏ残Feからなる組成の球状黒鉛鋳鉄
の−100メツシユのアトマイズ粉25w／ｏとAgの
−100メツシユのアトマイズ粉75w／ｏをＶ型混
合機にて混合後3ton／cm2の圧力にて加圧成形後真
空中にて900℃、２時間焼結する、さらに圧力を
6ton／cm2と高め同じ条件にて焼結したのち熱間押
出加工、伸線加工を経て、2.5φmmの線材となした
後ヘツダー加工により頭径5φmmのリベツト接点
の固定片となし可動片にAgを用いた。
従来例
Ag−Ni10w／ｏ、Ag−W5w／ｏ、Ag−
C1w／ｏ、Ag−Fe10w／ｏを粉末焼結法により
製造し、頭径5φmmのリベツト接点となした。
然してこれらの接点を下記の試験条件にて耐溶
着性、耐絶縁性及び耐消耗性の試験を行なつたと
ころ下表の右欄に示すような結果を得た。
試験条件
AC 100V50Hz
投入電流 40A
定常電流 10A
開閉回数 20回／min
負 荷 抵抗負荷
接触力 40gv
The present invention relates to an Ag-Fe-C based sintered electrical contact material. Conventional sintered electrical contact materials include nickel, silver, etc.
A dispersion of iron, tungsten, and graphite was used. However, when tungsten and graphite are used in relays, contact resistance is a problem in the case of tungsten because of the low contact pressure, and in the case of graphite, there is significant wear and there are problems in insulation resistance and pressure resistance. Therefore, sintered alloys of Ag-Ni and Ag-Fe are often used. However, in the case of Ag-Ni and Ag-Fe, Ag-W and
Initial welding, which did not occur with Ag-C, occurs, causing problems in welding resistance. The present invention has been made as a result of intensive research in view of the above points, and it is an object of the present invention to provide a sintered electrical contact material that is rich in low contact resistance, welding resistance, and abrasion resistance. The electrical contact material according to the present invention includes (1) Spheroidal graphite cast iron 5~30w/o and Ag70~95w/o
The graphite cast iron is an electrical contact material consisting of C3~4w/o, Si2~6w/o, Mn0.2~
1.5w/o, P0.06~0.2w/o, Mg0.02~0.1w/
(2) Spheroidal graphite cast iron 5-30w/o and Ag70-95w/
The graphite cast iron is an electrical contact material consisting of C3~4w/o, Si2~6w/o, Mn0.2~
1.5w/o, P0.06~0.2w/o, Mg0.02~0.1w/
A part of Fe with a composition consisting of o and the balance Fe
Ni22w/o or less, Mo1.0w/o or less or
This is an electrical contact material characterized by having a composition in which Cr2.5w/o or less is substituted. In the present invention, if powders of each component are mixed and dispersed with Ag powder to make a contact material without using spheroidal graphite cast iron, the plastic workability to obtain a predetermined shape is poor and problems such as cracks occur. . In addition, from the point of view of contact performance, if C itself is dispersed in Ag, wear resistance will be poor as in the Ag-graphite contact. However, when C is dispersed in Fe and as a Fe--C alloy in Ag, there is no problem with wear resistance, and rather the effect of lowering contact resistance is exhibited. Furthermore, it completely suppresses the occurrence of initial welding, which is a drawback of Ag-Fe electrical contact materials, making it a revolutionary product.
This is an improvement to Ag-Fe based electrical contact materials. The elements Si, Mn, P, and Mg are elements that do not interfere with contact performance, and are extremely effective elements for plastic working, and are essential alloying elements for spheroidal graphite cast iron with excellent workability. . Also,
The elements Ni, Mo, and Cr are optional additive elements that do not inhibit the contact performance even if they replace part of Fe, and have the same effects as above. The reason why the high percentage of spheroidal graphite cast iron is set to 5 to 30% is that if it is less than 5%, the overall C concentration is too low and there is no effect on contact resistance and welding resistance. If it exceeds 30%, the electrical conductivity becomes too low and the welding resistance and abrasion resistance deteriorate. Next, in order to clarify the effects of the composite electrical contact material according to the present invention, specific examples and conventional examples thereof will be described. Example 1 C4.0w/o, Si2.5w/o, Mn0.2w/o,
-100 mesh atomized powder of spheroidal graphite cast iron with a composition consisting of P0.06w/oMg0.05w/o residual Fe
-100 mesh atomized powder of 10W/o and Ag
After mixing 90w/o in a V-type mixer and press molding at a pressure of 2ton/ cm2 , 900w/o in a H2 - N2 mixed gas.
Sinter at ℃ for 2 hours. Furthermore, the pressure was increased to 4ton/cm 2 ,
6ton/cm 2 and 8ton/cm 2 , sintered under the same conditions, then hot extruded and wire drawn to 2.5φmm.
After making it into a wire rod, the head diameter is 5φmm by header processing.
Riveted contacts were used for the fixed piece and the movable piece. Example 2 C3w/o, Si2w/o, Mn1.5w/o, P0.2w/
o, Ni22w/o, Mo0.5w/o, Cr2.0w/o,
After mixing 25w/o of -100 mesh atomized powder of spheroidal graphite cast iron with a composition of Mg0.05w/o with residual Fe and 75w/o of -100 mesh atomized powder of Ag in a V-type mixer, 3ton/ cm2 of After pressure molding, sintering in vacuum at 900℃ for 2 hours, then pressurizing further.
After sintering under the same conditions as 6ton/cm 2, hot extrusion and wire drawing are made into a 2.5φmm wire rod, and header processing is performed to make a fixed piece and a movable piece of rivet contact with a head diameter of 5φmm. Ag was used. Conventional example Ag-Ni10w/o, Ag-W5w/o, Ag-
C1w/o and Ag-Fe10w/o were manufactured by a powder sintering method to form rivet contacts with a head diameter of 5φmm. However, when these contacts were tested for welding resistance, insulation resistance, and abrasion resistance under the following test conditions, the results shown in the right column of the table below were obtained. Test conditions AC 100V50Hz Closing current 40A Steady current 10A Switching/closing frequency 20 times/min Load Resistive load contact force 40gv
【表】
上記表で明らかなように従来の焼結接点材料で
あるAg−Ni、Ag−Ｗ、Ag−Ｃよりは耐溶着性、
耐絶縁性、耐消耗性に優れているのでリレーさら
には小型化されたマグネツトスイツチ等に使用し
た場合従来の焼結接点よりは数段の接点性能の向
上を得ることが確実にでき、本発明の優位性が明
らかである。[Table] As is clear from the table above, the welding resistance is higher than that of conventional sintered contact materials such as Ag-Ni, Ag-W, and Ag-C.
It has excellent insulation resistance and wear resistance, so when used in relays or miniaturized magnetic switches, it is sure to improve contact performance by several steps compared to conventional sintered contacts. The superiority of the invention is clear.
Claims (1)
ｏからなる電気接点材料であつて、前記黒鉛鋳鉄
が、C3〜4w／ｏ、Si2〜6w／ｏ、Mn0.2〜
1.5w／ｏ、P0.06〜0.2w／ｏ、Mg0.02〜0.1w／ｏ
および残部Feよりなる組成を有することを特徴
とする電気接点材料。 ２ 球状黒鉛鋳鉄５〜30w／ｏとAg70〜95w／
ｏからなる電気接点材料であつて、前記黒鉛鋳鉄
が、C3〜4w／ｏ、Si2〜6w／ｏ、Mn0.2〜
1.5w／ｏ、P0.06〜0.2w／ｏ、Mg0.02〜0.1w／ｏ
および残部Feよりなる組成のFeの一部を
Ni22w／ｏ以下、Mo1.0w／ｏ以下あるいは
Cr2.5w／ｏ以下で置き換えた組成を有すること
を特徴とする電気接点材料。[Claims] 1 Spheroidal graphite cast iron 5~30w/o and Ag70~95w/o
The graphite cast iron is an electrical contact material consisting of C3~4w/o, Si2~6w/o, Mn0.2~
1.5w/o, P0.06~0.2w/o, Mg0.02~0.1w/o
An electrical contact material characterized in that it has a composition consisting of Fe and the balance Fe. 2 Spheroidal graphite cast iron 5~30w/o and Ag70~95w/
The graphite cast iron is an electrical contact material consisting of C3~4w/o, Si2~6w/o, Mn0.2~
1.5w/o, P0.06~0.2w/o, Mg0.02~0.1w/o
and the remainder is Fe.
Ni22w/o or less, Mo1.0w/o or less or
An electrical contact material characterized by having a composition in which Cr2.5w/o or less is substituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18481780A JPS57108232A (en) | 1980-12-25 | 1980-12-25 | Electrical contact material and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18481780A JPS57108232A (en) | 1980-12-25 | 1980-12-25 | Electrical contact material and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57108232A JPS57108232A (en) | 1982-07-06 |
| JPH0127136B2 true JPH0127136B2 (en) | 1989-05-26 |
Family
ID=16159800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18481780A Granted JPS57108232A (en) | 1980-12-25 | 1980-12-25 | Electrical contact material and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57108232A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| YU46258B (en) * | 1987-06-06 | 1993-05-28 | Degussa Ag. | APPLICATION OF SILVER IRON MATERIAL FOR ELECTRICAL CONTACTS |
-
1980
- 1980-12-25 JP JP18481780A patent/JPS57108232A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57108232A (en) | 1982-07-06 |
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