JPH03122257A - Piston ring material - Google Patents
Piston ring materialInfo
- Publication number
- JPH03122257A JPH03122257A JP25950789A JP25950789A JPH03122257A JP H03122257 A JPH03122257 A JP H03122257A JP 25950789 A JP25950789 A JP 25950789A JP 25950789 A JP25950789 A JP 25950789A JP H03122257 A JPH03122257 A JP H03122257A
- Authority
- JP
- Japan
- Prior art keywords
- less
- sulfuric acid
- steel
- piston ring
- corrosion
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 26
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 9
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 229940032330 sulfuric acid Drugs 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 32
- 230000007797 corrosion Effects 0.000 description 32
- 229910000831 Steel Inorganic materials 0.000 description 26
- 239000010959 steel Substances 0.000 description 26
- 230000000694 effects Effects 0.000 description 13
- 238000012360 testing method Methods 0.000 description 9
- 150000001247 metal acetylides Chemical class 0.000 description 7
- 238000005121 nitriding Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 4
- 238000005204 segregation Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000376 effect on fatigue Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の燃焼室の気密性を保持することに
より機関の出力を確保することを主目的として使用され
るピストンリング材質に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a piston ring material used for the main purpose of ensuring the output of the engine by maintaining the airtightness of the combustion chamber of the internal combustion engine. It is.
ピストンリングの材質には従来鋳鉄が用いられてきたが
、近年のエンジンの効率化、高負荷さらに軽量化の要求
に伴いスチール製ピストンリングの適用が拡大しつつあ
る。このスチールピストンリングは、ピストンリングの
薄肉化が可能であるので軽量化の要求に応えるとともに
、さらに平線をリング加工することによって製造される
ため、製造工程が鋳鉄リングに比較し著しく簡略化でき
る利点がある。Traditionally, cast iron has been used as the material for piston rings, but in recent years steel piston rings have been increasingly used as engines demand greater efficiency, higher loads, and lighter weight. This steel piston ring allows the piston ring to be made thinner, meeting the demand for weight reduction, and since it is manufactured by processing a flat wire into a ring, the manufacturing process is significantly simpler than that for cast iron rings. There are advantages.
このような背景からスチールリング材として、本出願人
等は、例えば特公昭６１−２２１３１号、特公昭５７−
８３０２号、特公昭５８−４６５４２号、特公昭６１−
２１３０２号などに開示されるような多くの材質を提案
し実用化してきた。Against this background, the present applicant and others have developed, for example, Japanese Patent Publications No. 61-22131 and Japanese Patent Publication No. 57-1982 as steel ring materials.
No. 8302, Special Publication No. 58-46542, Special Publication No. 61-
Many materials, such as those disclosed in No. 21302, have been proposed and put into practical use.
現在、自動車エンジン用のスチール製ピストンリングの
うち、特に過酷な使用条件が要求されるものに対しては
５ｉ−Ｃｒ鋼（ＪＩＳ ５ＷＯ５Ｃ−Ｖ）、５ＫＤ６１
．１３Ｃｒおよび１７Ｃ；ｒ系マルテンサイトステンレ
ス鋼などが用いられている。これらの材質は、リング加
工性の要求からかたさＨＲＣ３８〜４５程度で使用され
ており、シリンダーと摺動するリング外周部は、耐摩耗
性や耐焼付性を向上させるため、硬質Ｃｒメツキや硬質
粒子を含む複合メツキまたは高Ｃｒ系の材質では主に窒
化処理が行われている。Currently, among steel piston rings for automobile engines, those that require particularly harsh usage conditions are made of 5i-Cr steel (JIS 5WO5C-V) and 5KD61.
．． 13Cr and 17C;r-based martensitic stainless steels are used. These materials are used with a hardness of HRC 38 to 45 due to ring processability requirements, and the outer periphery of the ring that slides on the cylinder is coated with hard Cr plating or hard particles to improve wear resistance and seizure resistance. Composite plating or high Cr-based materials containing nitriding are mainly performed.
現状では、１７Ｃｒ系ステンレス鋼（ＳＯ５４４０Ｂク
ラス）十窒化処理材が最も高性能の材料に位置付けられ
ているが、さらに高性能エンジン用として例えば特開平
１−２０８４３５号に記載の材質を本出願人は、先に提
案している。Currently, 17Cr-based stainless steel (SO5440B class) denitrided material is positioned as the most high-performance material, but the applicant has developed the material described in JP-A-1-208435, for example, for high-performance engines. , has been proposed earlier.
このようにスチールピストンリングは、自動車用エンジ
ンの高性能化に大きく寄与してきたが。In this way, steel piston rings have greatly contributed to improving the performance of automobile engines.
近年、エンジンの高性能化に加え、低級燃料の使用なら
びに排気ガス規制が厳しくなること等が相俟って、ピス
トンリング材はますます過酷な環境で使われるようにな
ってきた。In recent years, piston ring materials have come to be used in increasingly harsh environments due to improvements in engine performance, the use of lower-grade fuels, and stricter exhaust gas regulations.
特に、最近注目されているのは、硫酸中における腐食摩
耗特性および疲労特性である。これは、燃料中にイオウ
分が含まれるディーゼルエンジンの場合に主として問題
となる。前述のようにこれらの材質は表面を窒化して使
用されることが多いので、窒化層の硫酸中における腐食
摩耗特性および疲労特性がすぐれていることが要求され
る。In particular, corrosion wear and fatigue properties in sulfuric acid have recently attracted attention. This is primarily a problem in diesel engines where the fuel contains sulfur. As mentioned above, these materials are often used with their surfaces nitrided, so the nitrided layer is required to have excellent corrosion wear characteristics and fatigue characteristics in sulfuric acid.
従来の材料はこうした硫酸雰囲気中における腐食摩耗特
性および疲労特性についてはほとんど考慮されていない
。For conventional materials, little consideration has been given to the corrosive wear characteristics and fatigue characteristics in such a sulfuric acid atmosphere.
本発明の目的は、特に窒化して用いた場合に硫酸雰囲気
中における腐食摩耗特性および疲労特性がすぐれたピス
トンリング用材を提供することである。An object of the present invention is to provide a piston ring material that has excellent corrosion wear characteristics and fatigue characteristics in a sulfuric acid atmosphere, especially when used after being nitrided.
本発明者は、前記特開平１−２０８４３５号に開示され
た材料をベースに検討を加えた結果、ＮｉとＣｏが、特
に窒化層の耐硫酸腐食性の向上に効果的な元素であるこ
と、さらにＳ、Ｏ量を低く規制することにより非金属介
在物量を低減し、疲労強度および耐腐食性を向上させ、
またＰ量を低く制限することにより焼もどし時のＰの粒
界偏析を防止し、疲労強度を向上させることができるこ
とを知見して本発明を完成させるにいたった。As a result of studies based on the materials disclosed in JP-A-1-208435, the present inventor found that Ni and Co are elements that are particularly effective in improving the sulfuric acid corrosion resistance of the nitrided layer. Furthermore, by regulating the amount of S and O to a low level, the amount of nonmetallic inclusions is reduced, fatigue strength and corrosion resistance are improved,
Furthermore, the present invention was completed based on the finding that by limiting the amount of P to a low level, grain boundary segregation of P during tempering can be prevented and fatigue strength can be improved.
すなわち本発明は、重量％で、Ｇ ０．６〜１．１％、
Ｓｉ ２．０％以下、Ｍｎ２％以下、 Ｃｒ １０．０
−１８．０％、ＭｏとＷの１種または２種をＭｏ＋１／
２Ｗで０．５〜４．０％、２．５％以下のＮｉと１２％
以下のＣｏの１種または２種（ただしＮｉ＋Ｃｏで０．
５％以上）、Ｐ ０．０１５％以下、Ｓ ０．００５％
以下、０３０ｐｐｍ以下、残部Ｆｅおよび不可避的不純
物からなることを特徴とする硫酸雰囲気中での摩耗およ
び疲労特性のすぐれたピストンリング材、および重量％
で、Ｃｏ，６−１，１％、Ｓｉ２．０％以下、Ｍｎ２％
以下、Ｃｒ １０．０−１８．０％、ＭｏとＷの１種ま
たは２種をＭｏ＋１７２Ｗで０．５〜４．０％、ＶとＮ
ｂの１種または２種をＶ＋１／２Ｎｂで０．０５〜２．
０％、２．５％以下のＮｉと１２％以下のＧｏの１種ま
たは２種（ただしＮｉ＋Ｃｏで０．５％以上）、Ｐ ０
．０１５％以下、Ｓ ０．００５％以下、０３０ｐｐｍ
以下、残部Ｆｅおよび不可避的不純物からなることを特
徴とする硫酸雰囲気中での摩耗および疲労特性のすぐれ
たピストンリング材である。That is, in the present invention, G 0.6 to 1.1% in weight%,
Si 2.0% or less, Mn 2% or less, Cr 10.0
-18.0%, one or two of Mo and W added to Mo+1/
2W 0.5-4.0%, 2.5% or less Ni and 12%
One or two types of Co below (however, Ni+Co is 0.
5% or more), P 0.015% or less, S 0.005%
The following is a piston ring material with excellent wear and fatigue properties in a sulfuric acid atmosphere, characterized by comprising 0.030 ppm or less, the balance being Fe and unavoidable impurities, and weight%
So, Co, 6-1, 1%, Si 2.0% or less, Mn 2%
Below, Cr 10.0-18.0%, one or two of Mo and W 0.5-4.0% with Mo + 172W, V and N
0.05 to 2.b with V+1/2Nb.
0%, one or two of 2.5% or less Ni and 12% or less Go (however, 0.5% or more for Ni+Co), P 0
．． 015% or less, S 0.005% or less, 030ppm
The following is a piston ring material with excellent wear and fatigue properties in a sulfuric acid atmosphere, characterized in that the remainder is Fe and unavoidable impurities.
以下、本発明の成分の限定理由について述べる。 The reasons for limiting the components of the present invention will be described below.
ＣはＣｒ、Ｍｏ、Ｗ、Ｖ、Ｎｂとうの元素と結合して炭
化物を形成し、耐摩耗、耐焼付性の向上に寄与すると共
に、一部は基地中に固溶して基地を強化する。これらの
効果を得るためにＣは０．６％以上必要であるが、１．
１％を越えると過度の炭化物を形成することにより、耐
硫酸腐食性が低下する。またリング素材（平線）の製造
性およびリングの成形性も悪くなる。したがって、０．
６〜１．１％の範囲に限定する。C combines with elements such as Cr, Mo, W, V, and Nb to form carbides, which contributes to improving wear resistance and seizure resistance, and a part of it is dissolved in the base to strengthen the base. . In order to obtain these effects, 0.6% or more of C is required, but 1.
If it exceeds 1%, excessive carbides are formed, resulting in a decrease in sulfuric acid corrosion resistance. In addition, the manufacturability of the ring material (flat wire) and the moldability of the ring also deteriorate. Therefore, 0.
It is limited to a range of 6 to 1.1%.
Ｓｉは鋼の精錬時に脱酸の目的で添加されると共に、耐
硫酸腐食性の向上に効果的な元素である。Si is added for the purpose of deoxidizing steel during refining, and is an element effective in improving sulfuric acid corrosion resistance.
しかし、２％を越えると冷間加工性を害するのでＳｉは
２％以下に限定する。However, if it exceeds 2%, cold workability is impaired, so Si is limited to 2% or less.
Ｍｎは鋼の精錬時に脱硫の目的で添加されるが、２．０
％を越えると熱間加工性を害するので２．０％以下に限
定する。Mn is added for the purpose of desulfurization during steel refining, but 2.0
If it exceeds 2.0%, hot workability will be impaired, so it should be limited to 2.0% or less.
Ｃｒは前述のようにＣと結び付いて、炭化物（Ｍ、、
Ｃ，型およびＭ、Ｃ，型）を形成し、耐摩耗性および耐
焼付性を向上させる。さらに一部は、基地中に固溶して
耐酸化性、耐熱性を向上させる。また、窒化処理により
硬質の窒化層を生成し、耐摩耗性、耐焼付性を大きく向
上させる。これらの効果を得、また靭性を低下させない
ために通常の環境下（硫酸雰囲気中でない場合）では、
例えば特開平−２０８４３５号に記載のようにＣｒ量は
、７〜２５％の範囲で十分な対応可能であるが、硫酸雰
囲気中ではより過酷な条件下となるためＣｒ量は狭い範
囲に限定される。実験の結果によれば、Ｃｒ量が１０．
０％未満の場合、おそらく炭化物量が不足するために硫
酸中での腐食摩耗量が多くなる。またＣｒ量が１８．０
％を越えるとおそらく炭化物量および窒化を行った場合
にＣｒの窒化物量が過度になるため耐硫酸腐食性が低下
する。従ってＣｒ量１０．０〜１８．０％の範囲に限定
した。As mentioned above, Cr combines with C to form carbides (M,...
C, type and M, C, type) to improve wear resistance and seizure resistance. Furthermore, a part of it dissolves in the base to improve oxidation resistance and heat resistance. In addition, the nitriding process produces a hard nitrided layer, greatly improving wear resistance and seizure resistance. In order to obtain these effects and not reduce toughness, under normal environments (not in a sulfuric acid atmosphere),
For example, as described in JP-A-208435, a range of 7 to 25% Cr is sufficient, but in a sulfuric acid atmosphere the conditions are harsher, so the Cr content is limited to a narrow range. Ru. According to the experimental results, the amount of Cr is 10.
If it is less than 0%, the amount of corrosion and wear in sulfuric acid increases, probably due to insufficient amount of carbide. Also, the amount of Cr is 18.0
%, the amount of carbides and the amount of nitride of Cr become excessive when nitriding is performed, resulting in a decrease in sulfuric acid corrosion resistance. Therefore, the Cr content was limited to a range of 10.0 to 18.0%.
ＭｏとＷは、Ｃと結びついてそれ自体の炭化物を形成す
ると共に、Ｃｒ炭化物中にも固溶することにより、これ
を強化し、さらに焼もどしにおける軟化抵抗を高め、ま
た窒化処理を行う場合には窒化層形成にも寄与し、耐摩
耗性、耐焼付性を向上させる。さらにＭＯは、耐硫酸腐
食性を向上させる作用をもつ。これらの効果を得るため
には、Ｍｏ、Ｗの１種または２種を（Ｍｏ＋１７２Ｗ）
で少なくとも０．５％必要である。しかし、過度に添加
すると靭性を低下させるので（Ｍｏ＋１／２Ｗ）の上限
を４．０％とした。Mo and W combine with C to form their own carbide, and also form a solid solution in the Cr carbide, thereby strengthening it, increasing the softening resistance during tempering, and increasing the resistance when nitriding. also contributes to the formation of a nitrided layer, improving wear resistance and seizure resistance. Furthermore, MO has the effect of improving sulfuric acid corrosion resistance. In order to obtain these effects, one or both of Mo and W (Mo+172W) must be used.
At least 0.5% is required. However, if excessively added, the toughness decreases, so the upper limit of (Mo+1/2W) was set at 4.0%.
■とＮｂは両元素とも結晶粒を微細化し、靭性向上に寄
与するだけでなく、Ｍｏ、Ｗと同様それ自体で炭化物を
形成すると共に、Ｃｒ炭化物中にも固溶して、これを強
化することにより、耐摩耗性および耐焼付性を向上させ
、また焼戻し軟化抵抗を向上させる。また、両元素共、
耐硫酸腐食性を向上させる作用をもつ。これらの効果を
得るためには、■とＮｂの１種または２種を（Ｖ＋１／
２Ｎｂ）で少なくとも０．０５％以上必要である。しか
し過度に添加するとＭＣ型炭化物を過剰に生成して靭性
を劣化させるので、（Ｖ＋１／２Ｎｂ）量の上限を２．
０％とした。■ and Nb not only make crystal grains finer and contribute to improving toughness, but also form carbides on their own like Mo and W, and also form a solid solution in Cr carbide to strengthen it. This improves wear resistance and seizure resistance, and also improves temper softening resistance. In addition, both elements
It has the effect of improving sulfuric acid corrosion resistance. In order to obtain these effects, one or both of ■ and Nb must be added (V+1/
2Nb) at least 0.05% or more is required. However, if it is added excessively, MC type carbides are generated excessively and the toughness is deteriorated, so the upper limit of the amount of (V+1/2Nb) is set at 2.
It was set to 0%.
ＮｉとＧｏは、本発明において窒化層の耐硫酸腐食性を
向上させる重要な元素である。両元素とも炭化物を形成
せず、基地に固溶し、耐硫酸腐食性を高めるが、窒化物
を形成しないため窒化層中においてもその作用が残存す
ることが特徴であり、窒化処理を行って使用するピスト
ンリング材には特に有効である。この効果を得るために
はＮｉ。Ni and Go are important elements that improve the sulfuric acid corrosion resistance of the nitrided layer in the present invention. Both elements do not form carbides and are dissolved in the matrix, improving sulfuric acid corrosion resistance. However, since they do not form nitrides, their effects remain even in the nitrided layer, so it is not necessary to perform nitriding treatment. It is particularly effective for the piston ring material used. To obtain this effect, Ni.
Ｇｏの１種または２種を（Ｎｉ中Ｃｏ）で少なくとも０
．５％必要である。しかし、Ｎｉは２．５％を越えると
熱処理における所定の硬さが得られにくくなり、またＣ
ｏは１２％を越えると熱間加工性および冷間加工性を低
下させるので、Ｎｉは２．５％以下、Ｃｏは１２％以下
とした。One or two types of Go (Co in Ni) at least 0
．． 5% is required. However, if Ni exceeds 2.5%, it becomes difficult to obtain the desired hardness during heat treatment, and C
If o exceeds 12%, hot workability and cold workability are reduced, so Ni was set at 2.5% or less, and Co was set at 12% or less.
ｐ、ｓ、ｏは、通常不純物元素として微量含有される。p, s, and o are usually contained in trace amounts as impurity elements.
Ｐは結晶粒界に偏析（ミクロ偏析）し粒界強度を低下さ
せるだけでなく、凝固時の基地偏析（マクロ偏析）を助
長する。ＳやＯは主に非金属介在物として鋼中に存在し
、疲労強度および耐腐食性に悪影響を及ぼす。従って、
これらの不純物元素を低減することにより疲労強度およ
び耐腐食性が改善される。したがって、ｐ、ｓ、ｏは低
い方がより良好な特性をもたらすが、特にＰについては
０．０１５％以下で耐腐食疲労強度の改善効果が大きく
、Ｓについては０．００５％以下で、また○については
３０ｐｐｍ以下で特に耐腐食摩耗性および耐腐食疲労強
度の改善の効果が大きいことが見出された。P not only segregates at grain boundaries (micro-segregation) and reduces grain boundary strength, but also promotes matrix segregation (macro-segregation) during solidification. S and O mainly exist in steel as nonmetallic inclusions and have a negative effect on fatigue strength and corrosion resistance. Therefore,
Reducing these impurity elements improves fatigue strength and corrosion resistance. Therefore, the lower p, s, and o are, the better the properties will be. In particular, for P, the effect of improving corrosion resistance fatigue strength is large when it is 0.015% or less, and for S, when it is 0.005% or less, Regarding ○, it was found that the effect of improving corrosion wear resistance and corrosion resistance fatigue strength is particularly large when the content is 30 ppm or less.
このため、最高度の耐腐食摩耗性と耐腐食疲労強度を要
するものについてはそれぞれＰ ０．０１５％以下、Ｓ
０．００５％以下、０３０ｐｐｍ以下とした。For this reason, for items that require the highest degree of corrosion wear resistance and corrosion resistance fatigue strength, P is 0.015% or less and S
The content was set to 0.005% or less and 030 ppm or less.
第１表に示す成分の供試材を用いて比較を行った。比較
鋼のうち、Ｎｏ、９は現在窒化して使用されるスチール
リングとしては最も高級材質である１７Ｃ，ｒ系のステ
ンレス鋼、またＮｏ、１０〜１９は特開平１−２０８４
３５号に記載の材質である。Comparisons were made using test materials with the components shown in Table 1. Among the comparison steels, No. 9 is 17C, R stainless steel, which is the highest quality material for steel rings currently used in nitrided form, and Nos. 10 to 19 are JP-A-1-2084.
It is the material described in No. 35.
試料は、溶製、鍛伸、焼なましの工程により作製した後
、焼入、焼もどしを行なって、かたさをＨＲＣ４２〜４
６に調整した。続いて５４０℃×２０時間のガス窒化処
理を行った。ガス窒化処理により窒素拡散層の最表面に
もろい窒化物が形成されるため、研削によりこれを除去
して試験材とした。The samples were produced through the processes of melting, forging and annealing, and then quenched and tempered to achieve a hardness of HRC42 to 4.
Adjusted to 6. Subsequently, gas nitriding treatment was performed at 540° C. for 20 hours. Since brittle nitride was formed on the outermost surface of the nitrogen diffusion layer by the gas nitriding treatment, this was removed by grinding to obtain a test material.
第 ２ 表 第２表に窒化層の硫酸腐食試験の結果を示す。No. 2 table Table 2 shows the results of the sulfuric acid corrosion test on the nitrided layer.
試験は、４０℃に保った１０％硫酸溶液中に試験片を入
れて１時間保持した後の腐食減量により評価した。なお
、このときの腐食は全て窒化層内で進行していることを
ミクロ組織観察により確認した。The test was evaluated by corrosion weight loss after placing a test piece in a 10% sulfuric acid solution kept at 40°C and holding it for 1 hour. It was confirmed by microstructural observation that the corrosion at this time was entirely progressing within the nitride layer.
本発明鋼はいずれも比較ｔ１４Ｎｏ、９（１７Ｃｒステ
ンレスＲ）より腐食減量が少なく、最も良いものでは半
分以下であり、Ｎｌ＋ Ｇｏ添加の効果が大きいことが
わかる。比較鋼Ｎｏ、１０はＣ量が多いため、また比較
＠Ｎｏ、１２はＣｒ量が多いため腐食減量が増大してい
る。All of the steels of the present invention have less corrosion loss than comparative t14No and 9 (17Cr stainless steel R), and the best one is less than half, indicating that the effect of Nl+Go addition is large. Comparison steel No. 10 has a large amount of C, and comparative steel No. 12 has a large amount of Cr, so the corrosion loss increases.
比較鋼Ｎｏ、１３−１９は、Ｐ、Ｓ、Ｏ量以外は本発明
の成分範囲内に含まれ、Ｎｉ、ｃｏを含有している。し
たがって、比較１ＩＮｏ、９（１７ｃｒステンレス鋼）
よりは腐食減量が小さいが、Ｓ、０量の多いことにより
、本発明鋼よりは全般に腐食減量が大きくなっている。Comparative steel No. 13-19 is within the composition range of the present invention except for the amounts of P, S, and O, and contains Ni and co. Therefore, comparison 1I No. 9 (17cr stainless steel)
However, due to the large amount of S,0, the corrosion loss is generally larger than that of the steel of the present invention.
第
表
示した。本発明鋼はいずれも比較鋼より硫酸中における
腐食摩耗特性がすぐれている。比較ｄｌｌＮｏ。Displayed. All of the steels of the present invention have better corrosion wear characteristics in sulfuric acid than the comparative steels. Comparison dllNo.
工１はＣｒ量が低いため、単純な腐食試験（第２表）で
は良い値を示したのにもかかわらず、腐食摩耗量は比較
鋼Ｎｏ、９とほぼ同じであった。Because Steel No. 1 had a low Cr content, it showed good values in a simple corrosion test (Table 2), but the amount of corrosion wear was almost the same as Comparative Steel No. 9.
比較ｊｉＩＮｏ、１４．１５，１７．１９はＳ、０量が
本発明の範囲内より高いため、腐食摩耗量は比較＃ＩＮ
ａ、９よりは良いものの本発明鋼よりは全般に高い値を
示した。Comparison jiINo, 14.15, 17.19 has S, 0 amount higher than the range of the present invention, so the amount of corrosion wear is compared to #IN
a, which was better than 9, but generally higher than the steel of the present invention.
第 ４ 表
次に、腐食摩耗試験を行った結果を第３表にす。試験は
往復動摩擦試験機を用いて、鋳鉄を手付として２％Ｈ，
Ｓ０．を滴下しながら、行い摩食を測定し、比較鋼Ｎ
ｏ、９の値を１００として指数第４表に疲労試験を行っ
た結果を示す。試験は回転曲げ疲労試験機を用いて、１
０７型の疲労限応力を求めた。本発明鋼はｐ、ｓ、ｏ量
を低く規制したことにより疲労源応力は比較鋼に比べ格
段に高い値を示した。Table 4 Next, Table 3 shows the results of the corrosion wear test. The test was carried out using a reciprocating friction tester, using cast iron as a 2% H,
S0. The wear was measured while dripping, and the comparison steel N
Table 4 shows the results of the fatigue test with the values of o and 9 set as 100. The test was conducted using a rotating bending fatigue testing machine.
The fatigue limit stress of the 07 type was determined. In the steel of the present invention, the amounts of p, s, and o were regulated low, so that the fatigue source stress exhibited a much higher value than that of the comparative steel.
したがって、本発明鋼は硫酸に対する腐食特性がすぐれ
ているとともに、疲労強度もすぐれているので硫酸中で
の疲労強度が従来鋼より格段に高くなることが容易に推
察される。Therefore, since the steel of the present invention has excellent corrosion properties against sulfuric acid and also has excellent fatigue strength, it is easily inferred that the fatigue strength in sulfuric acid is much higher than that of conventional steel.
Claims (1)
、Ｍｎ２％以下、Ｃｒ１０．０〜１８．０％、ＭｏとＷ
の１種または２種をＭｏ＋１／２Ｗで０．５〜４．０％
、２．５％以下のＮｉと１２％以下のＣｏの１種または
２種（ただしＮｉ＋Ｃｏで０．５％以上）、Ｐ０．０１
５％以下、Ｓ０．００５％以下、Ｏ３０ｐｐｍ以下、残
部Ｆｅおよび不可避的不純物からなることを特徴とする
硫酸雰囲気中での摩耗および疲労特性のすぐれたピスト
ンリング材。 ２ 重量％で、Ｃ０．６〜１．１％、Ｓｉ２．０％以下
、Ｍｎ２％以下、Ｃｒ１０．０〜１８．０％、ＭｏとＷ
の１種または２種をＭｏ＋１／２Ｗで０．５〜４．０％
、ＶとＮｂの１種または２種をＶ＋１／２Ｎｂで０．０
５〜２．０％、２．５％以下のＮｉと１２％以下のＣｏ
の１種または２種（ただしＮｉ＋Ｃｏで０．５％以上）
、Ｐ０．０１５％以下、Ｓ０．００５％以下、Ｏ３０ｐ
ｐｍ以下、残部Ｆｅおよび不可避的不純物からなること
を特徴とする硫酸雰囲気中での摩耗および疲労特性のす
ぐれたピストンリング材。[Claims] 1% by weight: C 0.6 to 1.1%, Si 2.0% or less, Mn 2% or less, Cr 10.0 to 18.0%, Mo and W
0.5 to 4.0% of one or two types of Mo+1/2W
, 2.5% or less Ni and 12% or less Co (however, Ni + Co 0.5% or more), P0.01
A piston ring material having excellent wear and fatigue properties in a sulfuric acid atmosphere, characterized by comprising 5% or less, S 0.005% or less, O 30ppm or less, the balance being Fe and unavoidable impurities. 2% by weight, C 0.6-1.1%, Si 2.0% or less, Mn 2% or less, Cr 10.0-18.0%, Mo and W
0.5 to 4.0% of one or two types of Mo+1/2W
, one or both of V and Nb with V+1/2Nb at 0.0
5-2.0%, 2.5% or less Ni and 12% or less Co
1 type or 2 types (However, 0.5% or more for Ni + Co)
, P0.015% or less, S0.005% or less, O30p
A piston ring material having excellent wear and fatigue properties in a sulfuric acid atmosphere, characterized in that the balance is Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1259507A JP2981899B2 (en) | 1989-10-04 | 1989-10-04 | Piston ring material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1259507A JP2981899B2 (en) | 1989-10-04 | 1989-10-04 | Piston ring material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03122257A true JPH03122257A (en) | 1991-05-24 |
| JP2981899B2 JP2981899B2 (en) | 1999-11-22 |
Family
ID=17335064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1259507A Expired - Fee Related JP2981899B2 (en) | 1989-10-04 | 1989-10-04 | Piston ring material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2981899B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108529A1 (en) * | 2009-03-26 | 2010-09-30 | Federal-Mogul Burscheid Gmbh | Nitriding grade steel material composition for manufacturing piston rings and cylinder liners |
| CN104451397A (en) * | 2015-01-06 | 2015-03-25 | 江苏羽立新材料科技有限公司 | Precision alloy for piston ring in piston type internal combustion engine and manufacturing method of precision alloy |
| CN110678560A (en) * | 2017-05-26 | 2020-01-10 | 马勒国际有限公司 | Coated steel piston ring |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101087562B1 (en) | 2003-03-31 | 2011-11-28 | 히노 지도샤 가부시키가이샤 | Piston for internal combustion engine and producing method thereof |
-
1989
- 1989-10-04 JP JP1259507A patent/JP2981899B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108529A1 (en) * | 2009-03-26 | 2010-09-30 | Federal-Mogul Burscheid Gmbh | Nitriding grade steel material composition for manufacturing piston rings and cylinder liners |
| WO2010108685A1 (en) | 2009-03-26 | 2010-09-30 | Federal-Mogul Burscheid Gmbh | Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof |
| CN102257299A (en) * | 2009-03-26 | 2011-11-23 | 联邦摩高布尔沙伊德公司 | Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof |
| KR20120024561A (en) * | 2009-03-26 | 2012-03-14 | 페데랄-모굴 부르샤이트 게엠베하 | Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof |
| JP2012521489A (en) * | 2009-03-26 | 2012-09-13 | フェデラル−モーグル ブルシェイド ゲーエムベーハー | Nitritable steel piston ring, steel cylinder liner and casting method for manufacturing the same |
| US8647448B2 (en) | 2009-03-26 | 2014-02-11 | Federal-Mogul Burscheid Gmbh | Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof |
| US9650702B2 (en) | 2009-03-26 | 2017-05-16 | Federal-Mogul Burscheid Gmbh | Nitridable piston rings |
| CN104451397A (en) * | 2015-01-06 | 2015-03-25 | 江苏羽立新材料科技有限公司 | Precision alloy for piston ring in piston type internal combustion engine and manufacturing method of precision alloy |
| CN110678560A (en) * | 2017-05-26 | 2020-01-10 | 马勒国际有限公司 | Coated steel piston ring |
| US10563764B2 (en) * | 2017-05-26 | 2020-02-18 | Mahle International Gmbh | Coated steel piston ring |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2981899B2 (en) | 1999-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017119224A1 (en) | Large crankshaft | |
| JPH0826438B2 (en) | Ferritic heat-resistant cast steel with excellent thermal fatigue life | |
| US6224687B1 (en) | Piston ring material and piston ring with excellent scuffing resistance and workability | |
| US4948556A (en) | Piston ring material and piston ring | |
| EP0799902B1 (en) | Piston ring material excellent in workability | |
| JP2981899B2 (en) | Piston ring material | |
| JP2611984B2 (en) | Wire for piston ring | |
| JP2909456B2 (en) | Piston ring with excellent scuffing resistance | |
| JPH06145912A (en) | Piston ring material | |
| JPH05186854A (en) | Piston ring material | |
| JPH07197209A (en) | Ferritic heat resistant cast steel excellent in castability and exhaust system parts made thereof | |
| JP2866868B2 (en) | Piston ring material | |
| JP2002194500A (en) | Piston ring | |
| JP3744084B2 (en) | Heat-resistant alloy with excellent cold workability and overaging characteristics | |
| JPS63140067A (en) | Piston ring material | |
| JP2542778B2 (en) | Exhaust system parts | |
| JP2952006B2 (en) | Piston ring material | |
| JP3952328B2 (en) | Piston ring material with excellent scuffing resistance and workability | |
| JPS6233744A (en) | Heat-resistant cast steel | |
| JPS63280960A (en) | Piston ring made of steel | |
| JPH06145911A (en) | Piston ring material | |
| JPH0813090A (en) | Piston ring material | |
| JP2000097339A (en) | Combination of piston ring | |
| JP2001011577A (en) | Second ring material of piston for internal combustion engine | |
| JP2023140901A (en) | High hardness steel for cold working and machine component using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070924 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080924 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090924 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |