JPH01200008A - Rocker valve material - Google Patents
Rocker valve materialInfo
- Publication number
- JPH01200008A JPH01200008A JP2352988A JP2352988A JPH01200008A JP H01200008 A JPH01200008 A JP H01200008A JP 2352988 A JP2352988 A JP 2352988A JP 2352988 A JP2352988 A JP 2352988A JP H01200008 A JPH01200008 A JP H01200008A
- Authority
- JP
- Japan
- Prior art keywords
- wear resistance
- rocker valve
- rocker
- weight
- valve 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 29
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 7
- 229910052804 chromium Inorganic materials 0.000 abstract description 7
- 229910052748 manganese Inorganic materials 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、自動車のエンジン弁の開閉に用いるロッカー
バルブ用の材料に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a material for a rocker valve used for opening and closing an engine valve of an automobile.
ロッカーバルブ用材料には、耐摩耗性、耐ピツチング性
、耐スカッフィング性等の特性が要求される。Materials for rocker valves are required to have properties such as wear resistance, pitting resistance, and scuffing resistance.
従来、上記諸特性を同時に満足し、しかも精密鋳造法を
適用して製造しても十分な耐摩耗性を有する材質として
特公昭５９−５８４号公報には、Ｃｒ２７〜３０％、Ｃ
２，４〜３．２％、Ｍｎ１．０％以下。Conventionally, Japanese Patent Publication No. 59-584 describes a material that satisfies the above characteristics at the same time and has sufficient wear resistance even when manufactured using a precision casting method.
2.4-3.2%, Mn 1.0% or less.
Ｓｉ０．８７％未満、および残余が鉄および通常の不純
物よりなり、Ｃｒ／Ｃの組成比が９〜１３でかつ、Ｃｒ
／Ｃ／Ｓｉの組成比が１５以上である３０％系高Ｃｒ鋳
鉄ロッカーアーム材料が開示されている。Si is less than 0.87%, the remainder consists of iron and normal impurities, the Cr/C composition ratio is 9 to 13, and Cr
A 30% high Cr cast iron rocker arm material having a /C/Si composition ratio of 15 or more is disclosed.
従来ロッカーバルブ材料はその要求性能を満すため主と
して高Ｃｒ鋳鉄が多用されている。Conventionally, high Cr cast iron has been widely used as a material for rocker valves in order to meet the required performance.
しかるに近年、内燃機関の高性能化、すなわち高速回転
化に伴ないロッカーバルブをはじめ各部品にはより高性
能なものが要求されるようになってきた。However, in recent years, as the performance of internal combustion engines increases, that is, the speed of rotation increases, the rocker valves and other parts are required to have even higher performance.
このため高性能なロッカーアーム用材料として、前述の
特公昭５９−５８４号公報には、耐摩耗性、耐ピツチン
グ性、耐スカッフィング性等の諸特性を同時に満足する
３０％Ｃｒ鋳鉄系の材質が開示された。Therefore, as a material for high-performance rocker arms, the above-mentioned Japanese Patent Publication No. 59-584 recommends a 30% Cr cast iron material that satisfies various properties such as wear resistance, pitting resistance, and scuffing resistance. Disclosed.
しかしこの材質も未だ耐摩耗性が不十分と言われさらに
耐摩耗性の向上が要求されている。However, this material is said to still have insufficient wear resistance, and there is a demand for further improvements in wear resistance.
本発明の目的は、以上の状況に鑑み従来材の高速回転時
の耐摩耗性を改善したロッカーバルブ材料を提供するこ
とである。In view of the above circumstances, an object of the present invention is to provide a rocker valve material that has improved wear resistance during high speed rotation compared to conventional materials.
本発明は、重量比でＣ２，４〜３．２％、 Ｓｉ≦１．
０％、 Ｍｎ≦１．０％、Ｃｒ２３〜３５％、Ｍｏ＋１
／２Ｗ０、２〜２．０％、Ｖ０．２〜２．０％残部Ｆｅ
および不可避的不純物からなり、耐摩耗性に優れたこと
を特徴とするロッカーバルブ材料である。In the present invention, C2.4 to 3.2% by weight, Si≦1.
0%, Mn≦1.0%, Cr23-35%, Mo+1
/2W0, 2~2.0%, V0.2~2.0% balance Fe
This is a rocker valve material characterized by excellent wear resistance and consisting of unavoidable impurities.
そして、さらに望ましくは重量比でＭｏ＋１／２Ｗが０
．９〜１．２％、Ｖ０．９〜１．２％であることを特徴
とするロッカーバルブ材料である。More preferably, the weight ratio of Mo+1/2W is 0.
．． It is a rocker valve material characterized by having a content of 9 to 1.2% and a V of 0.9 to 1.2%.
高Ｃｒ系鋳鉄材料は、Ｃと叶等の炭化物生成元素の含有
量によっても炭化物の生成が左右され、材料の諸特性、
特に耐摩耗性が変動する。本発明は種々実験を重ねた結
果、従来の３０％Ｃｒ鋳鉄系のロッカーバルブ材料の諸
特性を低下することなく、耐摩耗性を向上し得たことに
基づくものである。In high Cr cast iron materials, the formation of carbides is also influenced by the content of carbide-forming elements such as carbon and leaves, and the various properties of the material,
In particular, wear resistance fluctuates. The present invention is based on the fact that, as a result of various experiments, it was possible to improve the wear resistance of the conventional 30% Cr cast iron rocker valve material without deteriorating its various properties.
次に本発明のロッカーバルブ材料の成分限定理由を述べ
る。Next, the reason for limiting the ingredients of the rocker valve material of the present invention will be described.
ＣはＣｒ、 Ｍ０． Ｗ、 Ｖと結合して炭化物を形
成せしめ、基地の硬さも高くして耐摩耗性を向上させる
。少なすぎると炭化物の生成が少なく、基地の硬さも高
くならず耐摩耗性が不足し、多すぎると逆に基地の硬さ
が低くなって耐摩耗性が低下する。C is Cr, M0. It combines with W and V to form carbides, increasing the hardness of the matrix and improving wear resistance. If it is too small, the formation of carbides will be small, and the hardness of the base will not be high, resulting in insufficient wear resistance.If it is too large, the hardness of the base will be low, resulting in a decrease in wear resistance.
したがってＣは２．４〜３．２％に規定する。Therefore, C is defined to be 2.4 to 3.2%.
Ｓｉは脱酸剤として添加するが、基地に固溶して硬さを
高め耐摩耗性に寄与するが１．０％を超えると基地の靭
性が低下するので、添加量は１．０％以下とする。Si is added as a deoxidizing agent, and it dissolves in the matrix to increase hardness and contribute to wear resistance, but if it exceeds 1.0%, the toughness of the matrix decreases, so the amount added is 1.0% or less. shall be.
ＭｎはＳｉと同様に主に脱酸剤として添加するが、１、
０％を超えるとオーステナイトが安定化して硬さが低下
し耐摩耗性に悪い影響を与えるので１．０％以下とする
。Like Si, Mn is mainly added as a deoxidizing agent, but 1,
If it exceeds 0%, austenite becomes stabilized, hardness decreases, and wear resistance is adversely affected, so the content should be 1.0% or less.
ＣｒはＣと結合して炭化物となって耐摩耗性を向上し、
結晶粒を微細化するが、２３％未満では本用途用には炭
化物量が少なく、３５％を超えると基地の硬さが低くな
り、耐摩耗性が不足するので２３〜３５％に規定する。Cr combines with C to form carbide and improves wear resistance.
The crystal grains are made finer, but if it is less than 23%, the amount of carbide is too small for this purpose, and if it exceeds 35%, the hardness of the base will be low and the wear resistance will be insufficient, so it is specified at 23 to 35%.
ＭｏおよびＷはＣと結合してＭ、Ｃ型の炭化物を形成し
耐摩耗性を高めるがＭｏ＋１／２Ｗが０．２％未満では
炭化′物量が少なく、２．０％を超えると基地に固溶す
るＣｉｌが不足して基地の硬さが低くなり耐摩耗性が低
下するので０．２〜２．０％とする。 −■はＣと結
合してＭＣ型炭化物を形成し耐摩耗性向上に効果がある
が、０．２％未満ではその効果が少なく、２．０％を超
えると基地のＣ量が不足して耐摩耗性に悪影響を及ぼす
ので０．２〜２．０％とする。Mo and W combine with C to form M- and C-type carbides and improve wear resistance, but if Mo+1/2W is less than 0.2%, the amount of carbide is small, and if it exceeds 2.0%, it will harden to the base. Since there is insufficient Cil to dissolve, the hardness of the base becomes low and the wear resistance decreases, so the content is set at 0.2 to 2.0%. -■ combines with C to form MC type carbide and is effective in improving wear resistance, but if it is less than 0.2%, the effect is small, and if it exceeds 2.0%, the amount of C in the base is insufficient. Since it has an adverse effect on wear resistance, it is set at 0.2 to 2.0%.
さらにＭｏおよびＷとＶは一緒に添加するとその効果が
大きいが、それぞれ１．０％添加した時効果が顕著であ
るのでＭｏ＋１／２Ｗおよび■の添加量は０．９〜１．
２％が望ましい。Furthermore, Mo, W, and V have a great effect when added together, but the effect is remarkable when each is added at 1.0%, so the amounts of Mo+1/2W and (2) should be 0.9 to 1.0%.
2% is desirable.
次に一実施例に基づいて本発明をさらに詳細に説明する
。Next, the present invention will be explained in more detail based on one embodiment.
第１表に示す組成のロッカーバルブ材料を高周波電気炉
で溶解して鋳型に鋳造し、型ばらし後、大戦式摩耗試験
片に加工した。摩耗試験の結果を第１図に示す。A rocker valve material having the composition shown in Table 1 was melted in a high-frequency electric furnace and cast into a mold, and after the mold was released, it was processed into a war-type wear test piece. The results of the wear test are shown in Figure 1.
第１図によればＭｏおよび■をそれぞれ１．０％添加し
た本発明材の試料１が最も耐摩耗性が優れている。また
Ｍｏまたは■が２．０％を超えた比較材の試料６．７は
本発明材よりも耐摩耗性が劣ることが明瞭である。この
原因はＭｏまたはＶが基地のＣと炭化物を形成するため
に、基地のＣが吸収されて、基地の硬さが低くなるため
である。According to FIG. 1, Sample 1 of the present invention material to which 1.0% of Mo and 1.0% each were added has the best wear resistance. In addition, it is clear that sample 6.7, a comparative material in which Mo or ■ exceeds 2.0%, has inferior wear resistance than the present invention material. This is because Mo or V forms a carbide with C in the base, which absorbs the C in the base and lowers the hardness of the base.
このように本発明によれば従来材の３０％Ｃｒ鋳鋼の耐
摩耗性を改善しロッカーバルブ材として優れた性能を得
ることができる。As described above, according to the present invention, the wear resistance of conventional 30% Cr cast steel can be improved and excellent performance as a rocker valve material can be obtained.
なお、本実施例では、ＭｏとＶを添加したもののみを示
し、Ｗを添加したものは記載しないで本発明を説明した
が、ＭｏとＷは鉄鋼中にあってはほぼ類似の作用と効果
があるので、Ｍｏ ＋１／ ２Ｗ ＝ ０．２〜２．０
の式にしたがって相互に置換し得るものである。In addition, in this example, the present invention was explained only with the addition of Mo and V, without describing the addition of W, but Mo and W have almost similar actions and effects in steel. Therefore, Mo + 1/2W = 0.2~2.0
They can be replaced with each other according to the formula.
以上述べたごとく、本発明によればロッカーバルブ材の
耐摩耗性を改善させることができ高速回転するエンジン
の性能の向とが可能である。As described above, according to the present invention, the wear resistance of the rocker valve material can be improved, and the performance of an engine rotating at high speed can be improved.
第１図は本発明に係るロッカーバルブ材料の大戦式摩耗
試験の結果を示すグラフである。FIG. 1 is a graph showing the results of a large-scale abrasion test for rocker valve materials according to the present invention.
Claims (1)
ｎ≦１．０％、Ｃｒ２３〜３５％、Ｍｏ＋１／２Ｗ０．
２〜２．０％、Ｖ０．２〜２．０％、残部Ｆｅおよび不
可避的不純物からなり、耐摩耗性に優れたことを特徴と
するロッカーバルブ材料。 ２、重量比でＭｏ＋１／２Ｗ０．９〜１．２％、Ｖ０．
９〜１．２％であることを特徴とする特許請求の範囲第
１項記載のロッカーバルブ材料。[Claims] 1. C2.4 to 3.2% by weight, Si≦1.0%, M
n≦1.0%, Cr23-35%, Mo+1/2W0.
A rocker valve material comprising 2% to 2.0% V, 0.2% to 2.0% V, the remainder Fe and unavoidable impurities, and has excellent wear resistance. 2. Mo+1/2W0.9-1.2% by weight, V0.
A rocker valve material according to claim 1, characterized in that the content is between 9 and 1.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2352988A JPH01200008A (en) | 1988-02-03 | 1988-02-03 | Rocker valve material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2352988A JPH01200008A (en) | 1988-02-03 | 1988-02-03 | Rocker valve material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01200008A true JPH01200008A (en) | 1989-08-11 |
Family
ID=12112975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2352988A Pending JPH01200008A (en) | 1988-02-03 | 1988-02-03 | Rocker valve material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01200008A (en) |
-
1988
- 1988-02-03 JP JP2352988A patent/JPH01200008A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3990892A (en) | Wear resistant and heat resistant alloy steels | |
| US4871512A (en) | Alloys for exhaust valve | |
| JPS5946300B2 (en) | Steel for cold forging with excellent machinability and its manufacturing method | |
| US5551995A (en) | Spheroidal graphite cast iron for crank shafts and a crank shaft manufactured from such cast iron | |
| JPH01200008A (en) | Rocker valve material | |
| US5195473A (en) | Rocker arm and method of casting | |
| US4218243A (en) | Fully martensitic steel for a metal mold for molding glass and the metal mold | |
| JPS6358216B2 (en) | ||
| JPH03177543A (en) | Valve steel | |
| JP2981899B2 (en) | Piston ring material | |
| JPS6112843A (en) | Co base alloy for engine valve and it valve sheet | |
| JPS5911656B2 (en) | High hardness wear-resistant cast iron | |
| JPS5839907B2 (en) | Surface damage resistant alloy cast iron | |
| JP2733773B2 (en) | Rocker arm | |
| JP2866868B2 (en) | Piston ring material | |
| JPS61217559A (en) | Free-cutting ball-bearing steel | |
| JPH01255651A (en) | High si-low cr bearing steel excellent in machinability | |
| JPS58120756A (en) | Ni alloy for valve and valve sheet of internal combustion engine | |
| JPS6115138B2 (en) | ||
| JPS5946301B2 (en) | Steel for cold forging with excellent machinability and its manufacturing method | |
| JPS60211050A (en) | Cast iron sliding member having excellent resistance to wear and scuffing and its production | |
| JPS61217558A (en) | Free-cutting ball-bearing steel | |
| JPS6389645A (en) | Valve steel | |
| JPS61281849A (en) | Valve guide for internal-combustion engine | |
| JPH0579749B2 (en) |