JPH0826426B2 - Ni-based alloy for spark plug electrode of internal combustion engine - Google Patents
Ni-based alloy for spark plug electrode of internal combustion engineInfo
- Publication number
- JPH0826426B2 JPH0826426B2 JP63185292A JP18529288A JPH0826426B2 JP H0826426 B2 JPH0826426 B2 JP H0826426B2 JP 63185292 A JP63185292 A JP 63185292A JP 18529288 A JP18529288 A JP 18529288A JP H0826426 B2 JPH0826426 B2 JP H0826426B2
- Authority
- JP
- Japan
- Prior art keywords
- high temperature
- internal combustion
- based alloy
- combustion engine
- plug electrode
- 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
-
- 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
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/39—Selection of materials for electrodes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Spark Plugs (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、特にすぐれた高温強度を有し、かつ内燃
機関の点火プラグ電極に要求される耐溶損性、高温耐食
性、および耐火花消耗性にもすぐれたNi基合金に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has particularly excellent high temperature strength, and has the melting resistance, high temperature corrosion resistance, and spark wear resistance required for spark plug electrodes of internal combustion engines. It also relates to an excellent Ni-based alloy.
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60-43897
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基合金が用いられている。In general, for example, a material forming an ignition plug electrode of an internal combustion engine such as an automatic engine is required to have high-temperature strength, melting resistance, high-temperature corrosion resistance, and spark exhaustion resistance, and thus have these characteristics, for example: Japanese Examined Japanese Patent Sho 60-43897
Ni-based alloys described in Japanese Patent Laid-Open Publication No. 2003-242, that is, in% by weight (hereinafter,% represents% 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%, and a Ni-based alloy having a composition of 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Ni基合金
は、これらの高温燃焼雰囲気で、すぐれた耐溶損性、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、点火プラグ電極としては比較的短
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 toward higher temperatures in the combustion atmosphere due to the speeding up of internal combustion engines and the use of high-octane gasoline, and the spark plug electrode is also exposed to these high-temperature combustion atmospheres. Ni-based alloys have excellent melting resistance, high-temperature corrosion resistance, and spark wear resistance in these high-temperature combustion atmospheres, but their high-temperature strength is not sufficient, so their service life is relatively short as a spark plug electrode. The current situation is that
そこで、本発明者等は、上述のような観点から、内燃
機関の点火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:0.1〜1%, Al:2〜5%,Co:0.5〜5%, 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基合金は、特に高温強度にすぐれ、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
たがってこのNi基合金を内燃機関の点火プラグ電極とし
て用いた場合に、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
にこの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し、また同じく合
金成分としてYおよび希土類元素のうちの1種以上を0.
001〜0.5%の割合で含有させると、耐溶損性および高温
耐食性が一層向上するようになるという知見を得たので
ある。From the above viewpoints, the present inventors have conducted research to develop a material having excellent characteristics at the spark plug electrode of the internal combustion engine and further excellent high temperature strength. : 0.1-1.5%, Mn: 0.1-1%, Al: 2-5%, Co: 0.5-5%, and the balance is Ni and unavoidable impurities. It also has excellent corrosion resistance, high temperature corrosion resistance, and spark wear resistance, and therefore, when this Ni-based alloy is used as an ignition plug electrode of an internal combustion engine, it is excellent even when exposed to a high temperature combustion atmosphere. When the Ni-based alloy contains 0.1 to 2% of Cr as an alloy component, high-temperature corrosion resistance is further improved, and Y and rare earth elements are also alloy components. 0 or more of the above.
It was found that the inclusion of 001 to 0.5% would further improve the melt damage resistance and high temperature corrosion resistance.
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:0.1〜1%, Al:2〜5%,Co:0.5〜5%, を含有し、さらに必要に応じて、 Cr:0.2〜3%と, Yおよび希土類元素のうちの1種以上:0.001〜0.5%, のうちのいずれか、または両方を含有し、残りがNiと不
可避不純物からなる組成を有する、特に高温強度のすぐ
れた内燃機関の点火プラグ電極用Ni基合金に特徴を有す
るものである。The present invention has been made based on the above findings, and contains Si: 0.1 to 1.5%, Mn: 0.1 to 1%, Al: 2 to 5%, Co: 0.5 to 5%, and is further required. In accordance with the above, a composition containing Cr: 0.2 to 3%, one or more of Y and rare earth elements: 0.001 to 0.5%, or both, and the balance of Ni and unavoidable impurities. It is characterized by a Ni-based alloy for an ignition plug electrode of an internal combustion engine having excellent high temperature strength.
つぎに、この発明のNi基合金において、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 composition of the Ni-based alloy of the present invention is limited as described above will be explained.
(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、溶製時に脱酸および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る、一方そ
の含有量が1%を越えると、高温耐食性が急激に劣化す
るようになることから、その含有量を0.1〜1%と定め
た。(B) Mn Mn component is an essential component because it is necessary to exert deoxidizing and desulfurizing effects during melting, but its content is 0.1%.
If it is less than 0.1%, a sufficient deoxidizing and desulfurizing effect can be obtained. On the other hand, if the content exceeds 1%, the high temperature corrosion resistance is rapidly deteriorated. Therefore, the content is set to 0.1 to 1%.
(c)Al Al成分には、高温強度および高温耐食性を向上させる
作用があるが、その含有量が2%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2
〜5%と定めた。(C) Al The Al component has an effect of improving high temperature strength and high temperature corrosion resistance, but if its content is less than 2%, the desired effect cannot be obtained, while its content exceeds 5%. Therefore, the workability will decrease, so the content should be 2
It was set at ~ 5%.
(d)Co Co成分には、Alとの共存において、Alによってもたら
される高温強度向上効果に比して一段と高い高温強度を
付与せしめる作用があるが、その含有量が0.5%未満で
は、所望の飛躍的高温強度向上効果が得られず、一方5
%を越えて含有させても高温強度により一層の向上効果
は現われず、経済性を考慮して、その含有量を0.5〜5
%と定めた。(D) Co Co component has the effect of imparting a higher high temperature strength in comparison with the effect of improving the high temperature strength provided by Al in the coexistence with Al. No dramatic improvement in high temperature strength was obtained, while 5
%, The effect of further improvement does not appear due to the high temperature strength, and considering the economic efficiency, the content should be 0.5-5.
Defined as%.
(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%.
(f)Yおよび希土類 これらの成分には、耐溶損性および高温耐食性を一層
向上させる作用があるので、必要に応じて含有させる
が、その含有量が0.001%未満では、前記作用に所望の
向上効果が得られず、一方その含有量が0.5%を越えて
も、より一層の向上効果は得られず、経済性を考慮し
て、その含有量を、0.001〜0.5%と定めた。(F) Y and rare earths These components have the effect of further improving the corrosion resistance and the high temperature corrosion resistance, so they are contained as necessary, but if the content is less than 0.001%, the desired improvement in the above functions is achieved. No effect was obtained, and even if the content exceeded 0.5%, no further improvement effect was obtained, and the content was determined to be 0.001 to 0.5% in consideration of economic efficiency.
つぎに、この発明のNi基合金を実施例により具体的に
説明する。Next, the Ni-based alloy 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
成分組成をもった本発明Ni基合金1〜19、比較Ni基合金
1〜5、および従来Ni基合金1〜4の溶湯を調製し、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、 (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の寸法をもった高温耐食性
試験用試片、 (c)耐火花消耗性を評価するための直径:2.5mmの点火
プラグの中心電極用線材と、断面寸法:2.5mm×1.4mmの
接地電極用線材、 (d)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、 をそれぞれ切出し、あるいは線引き加工や熱間鍛造によ
り形成し、以下の条件で各種の試験を行なった。Using an ordinary vacuum melting furnace, the molten alloys of the present invention Ni-based alloys 1 to 19, comparative Ni-based alloys 1 to 5, and conventional Ni-based alloys 1 to 4 each having the composition shown in Table 1 were prepared. Then, the ingot was formed by vacuum casting, and then the ingot was hot forged into a round bar having a diameter of 10 mm. From this round bar, (a) cross-sectional dimension for evaluating high temperature strength: 6 mm x 2 mm high temperature tensile test specimen and high temperature fatigue test specimen with dimensions of thickness (t): 6 mm x R: 30 mm x tip width (b): 25 mm specified in JIS Z2275, (b ) Diameter: 5 mm x length: 50 mm specimen for high temperature corrosion resistance test, (c) Wire for center electrode of spark plug with diameter: 2.5 mm for evaluating spark wear resistance, and cross-sectional dimension: 2.5mm × 1.4mm wire for ground electrode, (d) Cross-sectional dimension for evaluating melting resistance: 2.5mm × 1.4m
Samples for measuring the melting start temperature of m were cut out or formed by wire drawing or hot forging, and various tests were performed under the following conditions.
高温引張試験は、温度:700℃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 700 ° C. to measure the tensile strength.
高温疲労試験は、温度:700℃で、曲げ応力:6kgf/m
m2、荷重の繰り返し不可速度:3000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: 700 ℃, bending stress: 6kgf / m
It was carried out under the condition of m 2 and non-repeatable speed of load: 3000 times / minute, 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ドに乗せ、燃
焼ガス雰囲気中に、燃焼生成物として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:700℃
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、試験片の重量減を測定
した。The high temperature corrosion resistance test is carried out by placing a test piece on an alumina board and forming PbO as a combustion product in the combustion gas atmosphere.
Temperature: 700 ° C 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.
火花消耗性試験は、中心電極と接地電極を初期ギャッ
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1800ccガソリン
エンジンに組込み、回転数:5500r.p.m.、時間:100時間
の条件で運転することにより行ない、試験後のギャップ
増加量を測定した。In the spark exhaustion test, the center electrode and the ground electrode were set in the spark plug with the initial gap (distance between electrodes): 0.8 mm, and this spark plug was installed in a 1800cc gasoline engine equipped with a turbocharger, the rotation speed: 5500r.pm, Time: The operation was performed under the condition of 100 hours, and the amount of increase in the gap after the test 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1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 1.
第1表に示される結果から、本発明Ni基合金1〜19
は、いずれも従来Ni基合金1〜4と同等のすぐれた高温
耐食性、耐火花消耗性、および耐溶損性を有し、かつこ
れより一段とすぐれた高温強度を示すことが明らかであ
り、一方比較Ni基合金1〜5に見られるように、構成成
分のうちのいずれかの成分含有量(第1表に※印を付
す)でもこの発明の範囲から外れると上記特性のうちの
少なくともいずれかの特性が劣ったものになることが示
されている。From the results shown in Table 1, the present invention Ni-based alloys 1 to 19
It is clear that all of them have excellent high-temperature corrosion resistance, spark wear resistance, and erosion resistance equivalent to those of the conventional Ni-based alloys 1 to 4, and exhibit even higher high-temperature strength. As seen in Ni-based alloys 1 to 5, if the content of any of the constituent components (marked with * in Table 1) is outside the scope of the present invention, at least one of the above characteristics It has been shown to have inferior properties.
上述のように、この発明のNi基合金は、特にすぐれた
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、これらの特性
が要求される内燃機関の点火プラグ電極として用いた場
合に、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 Ni-based alloy of the present invention has particularly excellent high-temperature strength, and also has excellent high-temperature corrosion resistance, spark wear resistance, and melt damage resistance, so these characteristics are required. When used as an ignition plug electrode of an internal combustion engine, it has industrially useful properties such as excellent performance over a long period of time even when used under severe conditions.
───────────────────────────────────────────────────── 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 原 賢一 (56)参考文献 特開 昭55−44502(JP,A) 特開 昭63−89638(JP,A) 特開 昭51−85052(JP,A) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Mimura 1-297 Kitabukuro-cho, Omiya City, Saitama Prefecture Central Research Laboratory, Mitsubishi Metals Co., Ltd. Kenichi Hara (56) References, Okegawa Daiichi Seisakusho, Ltd. References JP-A-55-44502 (JP, A) JP-A-63-89638 (JP, A) JP-A-51-85052 (JP, A)
Claims (4)
重量%)を有することを特徴とする高温強度のすぐれた
内燃機関の点火プラグ電極用Ni基合金。1. A composition containing Si: 0.1 to 1.5%, Mn: 0.1 to 1%, Al: 2 to 5%, Co: 0.5 to 5%, the balance being Ni and inevitable impurities (above weight%). Ni-based alloy for spark plug electrodes for internal combustion engines, which has excellent high temperature strength.
重量%)を有することを特徴とする高温強度のすぐれた
内燃機関の点火プラグ電極用Ni基合金。2. Si: 0.1 to 1.5%, Mn: 0.1 to 1%, Al: 2 to 5%, Co: 0.5 to 5%, and Cr: 0.1 to 2%. A Ni-based alloy for an ignition plug electrode of an internal combustion engine, which is excellent in high temperature strength, characterized in that the rest has a composition (above wt%) consisting of Ni and inevitable impurities.
重量%)を有することを特徴とする高温強度のすぐれた
内燃機関の点火プラグ電極用Ni基合金。3. Si: 0.1 to 1.5%, Mn: 0.1 to 1%, Al: 2 to 5%, Co: 0.5 to 5%, and one or more of Y and rare earth elements: A Ni-based alloy for an ignition plug electrode of an internal combustion engine having excellent high temperature strength, characterized in that it contains 0.001 to 0.5%, and the balance is a composition (above wt%) consisting of Ni and inevitable impurities.
重量%)を有することを特徴とする高温強度のすぐれた
内燃機関の点火プラグ電極用Ni基合金。4. Si: 0.1 to 1.5%, Mn: 0.1 to 1%, Al: 2 to 5%, Co: 0.5 to 5%, and Cr: 0.1 to 2%, Y and rare earths. One or more of the elements: 0.001 to 0.5%, and the balance of Ni and unavoidable impurities (the content is at least% by weight) for the ignition plug electrode of an internal combustion engine having excellent high temperature strength Ni-based alloy.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63185292A JPH0826426B2 (en) | 1988-07-25 | 1988-07-25 | Ni-based alloy for spark plug electrode of internal combustion engine |
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 |
KR1019890007671A KR930003639B1 (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 |
---|---|---|---|
JP63185292A JPH0826426B2 (en) | 1988-07-25 | 1988-07-25 | Ni-based alloy for spark plug electrode of internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0234735A JPH0234735A (en) | 1990-02-05 |
JPH0826426B2 true JPH0826426B2 (en) | 1996-03-13 |
Family
ID=16168307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63185292A Expired - Lifetime JPH0826426B2 (en) | 1988-07-25 | 1988-07-25 | Ni-based alloy for spark plug electrode of internal combustion engine |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPH0826426B2 (en) |
KR (1) | KR930003639B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5697484B2 (en) | 2011-02-25 | 2015-04-08 | 株式会社デンソー | Spark plug electrode material |
JP2014058625A (en) | 2012-09-18 | 2014-04-03 | Hitachi Metals Ltd | Foamed resin molded article, foam insulated wire, cable and method of manufacturing foamed resin molded article |
-
1988
- 1988-07-25 JP JP63185292A patent/JPH0826426B2/en not_active Expired - Lifetime
-
1989
- 1989-06-03 KR KR1019890007671A patent/KR930003639B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR900001871A (en) | 1990-02-27 |
KR930003639B1 (en) | 1993-05-08 |
JPH0234735A (en) | 1990-02-05 |
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