JP2550158B2 - Spark plug electrode material for internal combustion engines - Google Patents
Spark plug electrode material for internal combustion enginesInfo
- Publication number
- JP2550158B2 JP2550158B2 JP63185293A JP18529388A JP2550158B2 JP 2550158 B2 JP2550158 B2 JP 2550158B2 JP 63185293 A JP63185293 A JP 63185293A JP 18529388 A JP18529388 A JP 18529388A JP 2550158 B2 JP2550158 B2 JP 2550158B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode material
- spark plug
- plug electrode
- internal combustion
- resistance
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、すぐれた高温強度を有し、かつ耐溶損
性、高温耐食性、および耐火花消耗性にもすぐれた内燃
機関の点火プラグ電極材に関するものである。The present invention relates to a spark plug electrode material for an internal combustion engine having excellent high-temperature strength and excellent erosion resistance, high-temperature corrosion resistance, and spark wear resistance. It is about.
一般に、例えば自動エンジンなどの内燃機関の点火プ
ラグ電極材を構成する材料としては、高温強度、耐溶損
性、高温耐食性、および耐火花消耗性が要求されること
から、これらの特性を具備した、例えば特公昭60−4389
7号公報に記載されるNi基合金、すなわち、重量％で、
（以下、％は重量％を示す）、 Si:0.2〜３％、Mn:0.5％以下、 を含有し、さらに、 Cr:0.2〜３％、Al:0.2〜３％、 Y:0.01〜１％、 のうちの２種以上を含有し、残りがNiと不可避不純物か
らなる組成を有するNi基合金などが用いられている。In general, for example, as a material for forming a spark plug electrode material of an internal combustion engine such as an automatic engine, high temperature strength, erosion resistance, high temperature corrosion resistance, and spark wear resistance are required, and therefore, these materials were provided. For example, Japanese Patent Publication No. 60-4389
Ni-based alloys described in Japanese Patent Publication No. 7, i.e., in% by weight,
(Hereinafter,% means% by weight), Si: 0.2 to 3%, Mn: 0.5% or less, and Cr: 0.2 to 3%, Al: 0.2 to 3%, Y: 0.01 to 1% , A Ni-based alloy having a composition containing two or more of the above and the balance Ni and inevitable impurities is used.
一方、近年の内燃機関の高速化並びにハイオクタン価
ガソリンの使用などによる燃焼雰囲気の高温化傾向は著
しく、これに伴ない点火プラグ電極材もこれらの高温燃
焼雰囲気にさらされることになるが、上記の従来のNi基
合金で構成された点火プラグ電極材は、これらの高温燃
焼雰囲気で、良好な耐溶損性、高温耐食性、および耐火
花消耗性を示すものの、高温強度が十分でないために、
比較的短時間で使用寿命に至るのが現状である。On the other hand, in recent years, there has been a marked tendency for the combustion atmosphere to become hot due to the increase in speed of internal combustion engines and the use of high-octane gasoline, and the spark plug electrode material is also exposed to these hot combustion atmospheres. A spark plug electrode material composed of a conventional Ni-based alloy, in these high-temperature combustion atmosphere, shows good melting loss resistance, high-temperature corrosion resistance, and spark wear resistance, but because the high-temperature strength is not sufficient,
At present, the service life is reached in a relatively short time.
そこで、本発明者等は、上述のような観点から、内燃
機関の欠点プラグ電極に要求される特性を具備した上
で、さらに高温強度のすぐれた材料を開発すべく研究を
行なった結果、 Si:0.1〜1.5％、Mn:0.1〜0.5％未満、 Al:3％超〜５％、Hfおよび／またはRe:0.001〜0.5％、 を含有し、残りがNiと不可避不純物からなる組成を有す
るNi基合金で構成された点火プラグ電極材は、高温強度
にすぐれ、かつすぐれた耐溶損性、高温耐食性、および
耐火花消耗性も具備し、したがって高温燃焼雰囲気にさ
らされてもすぐれた性能を著しく長期に亘って発揮する
ようになり、さらに前記点火プラグ電極材を構成するNi
基合金に、合金成分として0.1〜２％のCrを含有させる
と、一段と高温耐食性が向上するようになるという知見
を得たのである。Therefore, from the above viewpoints, the present inventors have conducted research to develop a material having excellent high temperature strength while having the characteristics required for a defective plug electrode of an internal combustion engine. : 0.1 to 1.5%, Mn: 0.1 to less than 0.5%, Al: more than 3% to 5%, Hf and / or Re: 0.001 to 0.5%, and Ni having a composition consisting of the balance Ni and inevitable impurities. The spark plug electrode material composed of the base alloy has excellent high-temperature strength, and also has excellent corrosion resistance, high-temperature corrosion resistance, and spark exhaustion resistance, and therefore has outstanding performance even when exposed to a high-temperature combustion atmosphere. Ni, which becomes effective over a long period of time and further constitutes the spark plug electrode material
It has been found that when the base alloy contains 0.1 to 2% of Cr as an alloy component, the high temperature corrosion resistance is further improved.
この発明は、上記知見にもとづいてなされたものであ
って、 Si:0.1〜1.5％、Mn:0.1〜0.5％未満、 Al:3％超〜５％、Hfおよび／またはRe:0.001〜0.5％、 を含有し、さらに必要に応じて、 Cr:0.1〜２％、 を含有し、残りがNiと不可避不純物からなる組成を有す
るNi基合金で構成された内燃機関の点火プラグ電極材に
特徴を有するものである。The present invention has been made based on the above findings, wherein Si: 0.1 to 1.5%, Mn: 0.1 to less than 0.5%, Al: more than 3% to 5%, Hf and / or Re: 0.001 to 0.5%. , And, if necessary, Cr: 0.1 to 2%, characterized in that the spark plug electrode material for an internal combustion engine is composed of a Ni-based alloy having a composition of Ni and inevitable impurities. I have.
つぎに、この発明の点火プラグ電極材を構成するNi基
合金の成分組成を上記の通りに限定した理由を説明す
る。Next, the reason why the component composition of the Ni-based alloy constituting the spark plug electrode material of the present invention is limited as described above will be described.
（ａ）Si Si成分には、Ni成分によってもたらされる耐溶損性を
損なうことなく、高温耐食性および耐火花消耗性を向上
させる作用があるが、その含有量が0.1％未満では前記
作用に所望の効果が得られず、一方その含有量が1.5％
を越えると耐溶損性に劣化傾向が現れるようになること
から、その含有量を0.1〜1.5％と定めた。(A) Si The Si component has an effect of improving high-temperature corrosion resistance and spark wear resistance without impairing the erosion resistance provided by the Ni component, but if the content is less than 0.1%, the above-mentioned effect is desired. No effect, while its content is 1.5%
When the content exceeds 0.1%, the erosion resistance tends to deteriorate. Therefore, the content is set to 0.1 to 1.5%.
（ｂ）Mn Mn成分は、溶製時に脱硫作用を発揮せしめる必要から
不可欠の成分であるが、その含有量が0.1％未満では十
分な脱酸および脱硫効果が得られず、一方の含有量が0.
5％以上になると、高温耐食性に劣化傾向が現れるよう
になることから、その含有量を0.1〜0.5％未満と定め
た。(B) Mn The Mn component is an essential component because it is necessary to exert a desulfurization action during melting, but if the content is less than 0.1%, sufficient deoxidizing and desulfurizing effects cannot be obtained, and one content 0.
If it exceeds 5%, the high temperature corrosion resistance tends to deteriorate, so the content was defined as 0.1 to less than 0.5%.
（ｃ）Al Al成分には、特に高温強度を著しく向上させ、かつ高
温耐食性を向上させる作用があるが、その含有量が３％
以下では前記作用に所望のすぐれた効果が得られず、一
方その含有量が５％を越えると加工性が低下するように
なることから、その含有量を３％超〜５％と定めた。(C) Al The Al component has the effect of significantly improving high-temperature strength and high-temperature corrosion resistance, but its content is 3%.
In the following, the desired excellent effect cannot be obtained in the above-mentioned action, and on the other hand, if the content exceeds 5%, the workability is deteriorated, so the content is defined as more than 3% to 5%.
（ｄ）HfおよびRe これらの成分には、高温強度を著しく向上させる作用
があるが、その含有量が0.001％未満では、所望のすぐ
れた高温強度を確保することができず、一方その含有量
が0.5％を越えると、加工性が低下するようになること
から、その含有量を0.001〜0.5％と定めた。(D) Hf and Re These components have the effect of significantly improving the high temperature strength, but if the content is less than 0.001%, the desired excellent high temperature strength cannot be secured, while the contents thereof When the content exceeds 0.5%, the workability is deteriorated, so the content was set to 0.001 to 0.5%.
（ｅ）Cr Cr成分には、高温耐食性を一段と向上させる作用があ
るので、必要に応じて含有されるが、その含有量が0.1
％未満では所望の高温耐食性向上効果が得られず、一方
その含有量が２％を越えると、耐溶損性が劣化するよう
になることから、その含有量を0.1〜２％と定めた。(E) Cr The Cr component has a function of further improving the high temperature corrosion resistance, so it is contained if necessary, but its content is 0.1
If it is less than 0.1%, the desired effect of improving the high temperature corrosion resistance cannot be obtained, while if it exceeds 2%, the melting resistance is deteriorated. Therefore, the content is set to 0.1 to 2%.
つぎに、この発明の点火プラグ電極材を実施例により
具体的に説明する。Next, the spark plug electrode material of the present invention will be specifically described with reference to examples.
通常の真空溶解炉を用い、それぞれ第１表に示される
成分組成をもったNi基合金溶湯を調整し、真空鋳造にて
鋳塊となし、ついでこの鋳塊を熱間鍛造にて直径:10mm
の丸棒とし、この丸棒から、さらに切出し、あるいは線
引きや加工や熱間鍛造にて、直径:2.5mmの中心電極材
と、断面寸法:2.5mm×1.4mmの接地電極材からなる本発
明点火プラグ電極材（以下、本発明電極材という）１〜
10および従来点火プラグ電極材（以下、従来電極材とい
う）１〜４をそれぞれ製造すると共に、 （ａ）高温強度を評価するための断面寸法:6mm×2mmの
高温引張試験用試片と、JIS Z2275に規定する厚さ
（ｔ）:6mm×R:30mm×先端幅（ｂ）:25mmの寸法をもっ
た高温疲労試験用試片、 （ｂ）直径:5mm×長さ:50mmの寸法もった高温耐食性試
験用試片、 （ｃ）耐溶損性を評価するための断面寸法:2.5mm×1.4m
mの溶融開始温度測定用試片、 をそれぞれ形成した。Using a normal vacuum melting furnace, we prepared Ni-based alloy melts each having the composition shown in Table 1, formed into ingots by vacuum casting, and then hot forged these ingots to a diameter of 10 mm.
The present invention, which is composed of a center electrode material having a diameter of 2.5 mm and a ground electrode material having a cross-sectional dimension of 2.5 mm × 1.4 mm by further cutting, or drawing or processing or hot forging from this round bar. Spark plug electrode material (hereinafter referred to as the electrode material of the present invention) 1
10 and conventional spark plug electrode materials (hereinafter referred to as conventional electrode materials) 1 to 4 are manufactured, respectively, and (a) cross-sectional dimensions for evaluating high temperature strength: 6 mm x 2 mm high temperature tensile test specimen and JIS Z2275 specified thickness (t): 6mm x R: 30mm x tip width (b): 25mm high temperature fatigue test specimen, (b) diameter: 5mm x length: 50mm Specimen for high temperature corrosion resistance test, (c) Sectional dimension for evaluating melt resistance: 2.5mm × 1.4m
Samples for measuring the melting start temperature of m were respectively formed.
上記の本発明電極材１〜10および従来電極材１〜４に
ついては、中心電極材と接地電極材を初期ギャップ（電
極間距離）:0.8mmで点火プラグにセットし、この点火プ
ラグをターボチャージャー装着の3000ccガソリンエンジ
ンに組込み、回転数:500r.p.m.、時間:50時間の条件で
運転し、運転後のギャップ増加量を測定し、この測定結
果にもとづき、耐火花消耗性を評価した。Regarding the above-mentioned electrode materials 1 to 10 of the present invention and conventional electrode materials 1 to 4, the center electrode material and the ground electrode material were set in an ignition plug with an initial gap (distance between electrodes): 0.8 mm, and this ignition plug was turbocharged. It was installed in a 3000cc gasoline engine installed and operated under the conditions of rotation speed: 500r.pm, time: 50 hours, the gap increase amount after operation was measured, and the spark wear resistance was evaluated based on the measurement result.
また、上記の各種試片を用い、以下の条件で試験を行
なうことにより上記本発明電極材１〜10および従来電極
材１〜４のもつ特性を評価した。Further, the characteristics of the electrode materials 1 to 10 of the present invention and the conventional electrode materials 1 to 4 were evaluated by conducting a test under the following conditions using each of the above-mentioned test pieces.
高温引張試験は、温度:750℃で行ない、引張り強さを
測定した。The high temperature tensile test was performed at a temperature of 750 ° C. to measure the tensile strength.
高温疲労試験は、温度:750℃で、曲げ応力:7kgf/m
m2、荷重の繰り返し付加速度:2500回／分の条件で行な
い、破断に至るまでの曲げ回数を測定した。High temperature fatigue test, temperature: 750 ℃, bending stress: 7kgf / m
It was carried out under the conditions of m 2 , repeated load rate: 2500 times / min, and the number of times of bending until breakage was measured.
高温耐食性試験は、試片をアルミナボートに乗せ、燃
焼ガス雰囲気中に、燃焼性成物としてPbOを形成するPb
化合物を連続的に定量供給できる装置内で、温度:800℃
に100時間加熱保持の条件で行ない、試験後、ワイヤー
ブラシにて脱スケールを行ない、試片の重量減を測定し
た。The high temperature corrosion resistance test is carried out by placing a test piece on an alumina boat and forming PbO as a combustible product in a combustion gas atmosphere.
Temperature: 800 ℃ in a device that can continuously supply a fixed amount of compound
After heating for 100 hours, the test piece was descaled with a wire brush, and the weight loss of the test piece was measured.
また、耐溶損性評価試験では、溶融開始温度を測定し
た。これらの測定結果を第２表に示した。 In addition, in the melting resistance evaluation test, the melting start temperature was measured. The results of these measurements are shown in Table 2.
第1,2表に示される結果から、本発明電極材１〜10
は、すぐれた高温耐食性、耐火花消耗性、および耐溶損
性を有し、かつ従来電極材１〜４に比して一段とすぐれ
た高温強度を有することが明らかである。From the results shown in Tables 1 and 2, the electrode materials of the present invention 1 to 10
It is clear that has excellent high temperature corrosion resistance, spark wear resistance, and melting resistance, and has much higher high temperature strength than the conventional electrode materials 1 to 4.
上述のように、この発明の点火プラグ電極材は、すぐ
れた高温強度を有し、かつすぐれた高温耐食性、耐火花
消耗性、および耐溶損性も具備しているので、苛酷な条
件下での使用でもすぐれた性能を著しく長期に亘って発
揮するなど工業上有用な特性を有するのである。As described above, the spark plug electrode material of the present invention has excellent high-temperature strength, and also has excellent high-temperature corrosion resistance, spark wear resistance, and erosion resistance. It has industrially useful characteristics such as excellent performance over a long period of time even when used.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 三村 章 埼玉県大宮市北袋町１―297 三菱金属 株式会社中央研究所内 (72)発明者 倉内 伸好 埼玉県桶川市上日出谷1230 三菱金属株 式会社桶川第一製作所内 審査官 鈴木 正紀 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Mimura 1-297 Kitabukuro-cho, Omiya City, Saitama Prefecture Central Research Laboratory, Mitsubishi Metals Co., Ltd. (72) Nobuyoshi Kurauchi 1230 Kamihideya, Okegawa City, Saitama Mitsubishi Metal Corporation Masaki Suzuki Examiner at Okegawa Daiichi Factory
Claims (2)
重量％）を有するNi基合金で構成したことを特徴とする
内燃機関の点火プラグ電極材。1. Si: 0.1 to 1.5%, Mn: 0.1 to less than 0.5%, Al: more than 3% to 5%, Hf and / or Re: 0.001 to 0.5%, with the balance being Ni and inevitable impurities. A spark plug electrode material for an internal combustion engine, characterized in that the spark plug electrode material is composed of a Ni-based alloy having a composition of (at least by weight).
重量％）を有するNi基合金で構成したことを特徴とする
内燃機関の点火プラグ電極材。2. Si: 0.1 to 1.5%, Mn: 0.1 to less than 0.5%, Al: more than 3% to 5%, Hf and / or Re: 0.001 to 0.5%, and Cr: 0.1 to 0.5%. An ignition plug electrode material for an internal combustion engine, characterized in that it is made of a Ni-based alloy having a composition (2% by weight or more) containing 2% and the balance being Ni and inevitable impurities.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63185293A JP2550158B2 (en) | 1988-07-25 | 1988-07-25 | Spark plug electrode material for internal combustion engines |
| GB8911072A GB2221222B (en) | 1988-07-25 | 1989-05-15 | An ni base alloy for spark plug electrodes of internal combustion engines |
| DE3916378A DE3916378A1 (en) | 1988-07-25 | 1989-05-17 | Nickel-based alloy for spark plug electrodes for internal combustion engines |
| KR1019890007672A KR930003640B1 (en) | 1988-07-25 | 1989-06-03 | Nickel alloy for electrode of ignition plug |
| US07/804,486 US5204059A (en) | 1988-07-25 | 1991-12-09 | Ni base alloy for spark plug electrodes of internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63185293A JP2550158B2 (en) | 1988-07-25 | 1988-07-25 | Spark plug electrode material for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0234736A JPH0234736A (en) | 1990-02-05 |
| JP2550158B2 true JP2550158B2 (en) | 1996-11-06 |
Family
ID=16168324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63185293A Expired - Lifetime JP2550158B2 (en) | 1988-07-25 | 1988-07-25 | Spark plug electrode material for internal combustion engines |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2550158B2 (en) |
| KR (1) | KR930003640B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4706441B2 (en) * | 2004-11-04 | 2011-06-22 | 日立金属株式会社 | Spark plug electrode material |
| JP4735963B2 (en) * | 2005-09-29 | 2011-07-27 | 日立金属株式会社 | Spark plug electrode material |
| DE102006035111B4 (en) * | 2006-07-29 | 2010-01-14 | Thyssenkrupp Vdm Gmbh | Nickel-based alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5185052A (en) * | 1975-01-08 | 1976-07-26 | Hitachi Ltd | TENKAPURAGUDENKYOKUYONITSUKERUGOKIN |
| JPS6389638A (en) * | 1986-10-01 | 1988-04-20 | Sumitomo Electric Ind Ltd | Electrode material for spark plug |
| JPS63118039A (en) * | 1986-11-05 | 1988-05-23 | Toshiba Corp | Electrode material for spark plug |
-
1988
- 1988-07-25 JP JP63185293A patent/JP2550158B2/en not_active Expired - Lifetime
-
1989
- 1989-06-03 KR KR1019890007672A patent/KR930003640B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5185052A (en) * | 1975-01-08 | 1976-07-26 | Hitachi Ltd | TENKAPURAGUDENKYOKUYONITSUKERUGOKIN |
| JPS6389638A (en) * | 1986-10-01 | 1988-04-20 | Sumitomo Electric Ind Ltd | Electrode material for spark plug |
| JPS63118039A (en) * | 1986-11-05 | 1988-05-23 | Toshiba Corp | Electrode material for spark plug |
Also Published As
| Publication number | Publication date |
|---|---|
| KR930003640B1 (en) | 1993-05-08 |
| JPH0234736A (en) | 1990-02-05 |
| KR900001872A (en) | 1990-02-27 |
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