JPH0286907A - Sliding member excellent in pitting fatigue abrasion resistance property - Google Patents
Sliding member excellent in pitting fatigue abrasion resistance propertyInfo
- Publication number
- JPH0286907A JPH0286907A JP24058788A JP24058788A JPH0286907A JP H0286907 A JPH0286907 A JP H0286907A JP 24058788 A JP24058788 A JP 24058788A JP 24058788 A JP24058788 A JP 24058788A JP H0286907 A JPH0286907 A JP H0286907A
- Authority
- JP
- Japan
- Prior art keywords
- sliding member
- test piece
- abrasion resistance
- nitride
- resistance property
- 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
- 238000005299 abrasion Methods 0.000 title abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000004767 nitrides Chemical class 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 abstract description 11
- 239000002344 surface layer Substances 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 2
- 239000010962 carbon steel Substances 0.000 abstract description 2
- -1 chrome nitride Chemical class 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 5
- 238000007733 ion plating Methods 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 description 9
- 239000011651 chromium Substances 0.000 description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 8
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- SJKRCWUQJZIWQB-UHFFFAOYSA-N azane;chromium Chemical compound N.[Cr] SJKRCWUQJZIWQB-UHFFFAOYSA-N 0.000 description 3
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 3
- 238000005422 blasting Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910019590 Cr-N Inorganic materials 0.000 description 1
- 229910019588 Cr—N Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 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、耐ピッチング疲労摩耗性に優れた摺動部材に
係り、更に詳しくは高面圧を受けながら摺動する際に耐
久性の良い摺動部材に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a sliding member with excellent pitting fatigue wear resistance, and more specifically, a sliding member with good durability when sliding under high surface pressure. Regarding sliding members.
(従来技術と課題)
近年、カムシャフトの使用するカムの数を減らしたり、
高回転化に伴ってフォロワをカムに押しつける力を大き
くしたりするエンジンの設計要求があり、結果としてカ
ム、カムフォロワ間にがかる面圧が高まり、これまで多
く使用されてきた高クロムチル鋳鉄では摩耗が多く耐久
性に問題が生じてきた。この要求に対して焼結合金のフ
ォロワを使用することが多くなってきているが、焼結合
金のフォロワが摩耗しない替わりにチルド化した相手カ
ムノーズを攻撃し易い傾向にあり、面圧が高くなるとカ
ムノーズとのスカッフィングを起し易い傾向にある。又
、焼結合金製パッドをロッカーアームに接合させるコス
トおよび被研削性に劣るため加工コストが高いという短
所がある。そこで前述した問題点の解消のため、本発明
者等は「伝動装置」 (特願昭63−132394号)
として、1〜100μmのCr−N膜等のイオンブレー
ティング皮膜処理をしたカムフォロワを例とした出願を
している。しかし、フォロワ面に受けるヘルツ応力が8
0 k g/mm2を超える要求にあっては、皮膜厚さ
が1107z以下ではヘルツ応力のかかる深さの母材の
疲労強度が劣るとピッチング疲労摩耗を起すおそれがあ
る。(Prior technology and issues) In recent years, the number of cams used in camshafts has been reduced,
As engine speeds increase, there is a demand for engine designs that increase the force that presses the follower against the cam.As a result, the surface pressure between the cam and cam follower increases, causing wear in the high chromium chilled cast iron that has been widely used up until now. There have been many problems with durability. In response to this demand, sintered alloy followers are increasingly being used, but although sintered alloy followers do not wear out, they tend to attack the chilled mating cam nose, and when the surface pressure increases, It tends to cause scuffing with the cam nose. Further, there are disadvantages in that the cost of joining the sintered metal pad to the rocker arm and the high machining cost due to poor grindability. Therefore, in order to solve the above-mentioned problems, the present inventors developed a "transmission device" (Japanese Patent Application No. 132394/1983).
As an example, a cam follower treated with an ion-blating film such as a 1-100 μm Cr-N film has been filed. However, the Hertzian stress on the follower surface is 8
For requirements exceeding 0 kg/mm2, if the coating thickness is 1107z or less, pitting fatigue wear may occur if the fatigue strength of the base material at the depth where Hertzian stress is applied is poor.
(発明の目的)
本発明は上記に鑑みてなされたもので、金属窒化物又は
金属炭化物の皮膜厚さが10μm以下でも耐ピッチング
疲労摩耗性に優れた摺動部材を提供することを目的とす
るものである。(Object of the Invention) The present invention has been made in view of the above, and an object of the present invention is to provide a sliding member that has excellent pitting fatigue wear resistance even when the thickness of the metal nitride or metal carbide film is 10 μm or less. It is something.
(課題を解決するための手段)
本発明は、鉄基母材の表面に金属窒化物又は金属炭化物
皮膜層を形成した摺動部材であって、前記皮膜層直下の
母材硬さがHmV400以上である耐ピッチング疲労摩
耗性に優れた摺動部材である。(Means for Solving the Problems) The present invention provides a sliding member in which a metal nitride or metal carbide film layer is formed on the surface of an iron-based base material, wherein the base material hardness immediately below the film layer is HmV400 or more. This is a sliding member with excellent pitting fatigue and wear resistance.
鉄基母材としては、炭素鋼、浸炭用鋼、窒化用鋼等が挙
げられる。Examples of the iron base material include carbon steel, carburizing steel, and nitriding steel.
金属窒化物又は金属炭化物の表面層は、反応性イオンブ
レーティングによって形成させる。The metal nitride or metal carbide surface layer is formed by reactive ion blasting.
反応性イオンブレーティングによって形成する表面層の
種類としては代表的なものとしては、クロムの窒化物が
挙げられる。クロムの窒化物としてはCr2N、CrN
等が考えられCrNはCr、Nよりも硬度が高く耐摩耗
性は優れているが皮膜の柔軟性が劣り密着性が比較的劣
る傾向があるが実用的には問題がない(特願昭62−3
15751号、同62316965号)。過酷な条件に
おいて更に密着性を上げる必要がある場合には素材表面
に先ず金属クロムの層を形成し次にCr2N−次いでC
rNの皮膜を形成する方法が取られ密着性が良くしかも
耐摩耗性が優れた皮膜とすることができる。あるいは金
属クロム、Cr2N、CrNの超微細な混合組織とする
こともできる(特願昭61−27772号、同59−2
07986号)。A typical type of surface layer formed by reactive ion blasting is chromium nitride. Cr2N, CrN as chromium nitride
CrN has higher hardness than Cr and N and has excellent abrasion resistance, but the film tends to be less flexible and has relatively poor adhesion, but there is no problem in practical use (Patent Application No. 62 -3
No. 15751, No. 62316965). If it is necessary to further improve the adhesion under harsh conditions, first a layer of metallic chromium is formed on the surface of the material, then Cr2N-then C
By using a method of forming an rN film, it is possible to obtain a film with good adhesion and excellent wear resistance. Alternatively, an ultrafine mixed structure of metallic chromium, Cr2N, and CrN can be used (Japanese Patent Application Nos. 61-27772 and 59-2).
No. 07986).
表面層を構成する成分をクロムとその窒化物との積層構
造とする理由は、反応性イオンブレーティングにより素
材金属表面に形成されるクロム相が素材金属との密着性
が良好であり、又その熱膨張係数が前記素材金属の熱膨
張係数に近く、従って使用中に表面層が前記金属素材か
ら剥離することが防止できるためである。又、表面層の
構成成分としてクロムを採用する理由は、イオンブレー
ティングによる金属クロムの蒸着速度が他の金属のそれ
よりも大であり生産性の点から極めて有利であるためで
ある。The reason why the component constituting the surface layer is a layered structure of chromium and its nitride is that the chromium phase formed on the surface of the raw metal by reactive ion blasting has good adhesion to the raw metal, and This is because the coefficient of thermal expansion is close to that of the metal material, and therefore the surface layer can be prevented from peeling off from the metal material during use. Further, the reason why chromium is employed as a constituent of the surface layer is that the deposition rate of metallic chromium by ion blating is higher than that of other metals, and is extremely advantageous in terms of productivity.
他に、窒化クロムと窒化チタンからなる複合皮膜(特願
昭61−27773号)、金属クロムと窒化クロムから
なる下地層と下地層の上に窒化チタンの耐摩耗層からな
る複合皮膜(特願昭61−124669号)、炭化チタ
ンと窒化チタンの固溶体でなる表面層(特願昭60−1
20563号)等が考えられる。窒化チタンは窒化クロ
ムよりも硬度が高く耐摩耗性が優れているが柔軟性が劣
るため剥離の発生が窒化クロムよりも起こり易いが窒化
チタン単独でも実用的には問題がない。In addition, we have developed a composite coating consisting of chromium nitride and titanium nitride (Japanese Patent Application No. 61-27773), a base layer consisting of metallic chromium and chromium nitride, and a composite coating consisting of a wear-resistant layer of titanium nitride on the base layer (Patent Application No. 61-27773). (Sho 61-124669), a surface layer made of a solid solution of titanium carbide and titanium nitride (Japanese Patent Application No. Sho 60-1)
No. 20563) etc. can be considered. Although titanium nitride has higher hardness and better wear resistance than chromium nitride, it is less flexible and peels more easily than chromium nitride, but titanium nitride alone poses no practical problem.
摺動部材としては例えばカムフォロワ、軸受、歯車等で
ある。Examples of the sliding member include a cam follower, a bearing, and a gear.
硬化処理はイオンブレーティング皮膜処理の前又は後に
行い、硬化処理すべき母材表面層の厚さは皮膜層直下母
材0.1mm以上である。硬化された硬さはHm V
400以上で、Hm V 400未満では本発明の目的
を達成することができない。The hardening treatment is performed before or after the ion-blating film treatment, and the thickness of the base material surface layer to be hardened is 0.1 mm or more of the base material directly below the film layer. Cured hardness is Hm V
If Hm V is 400 or more and less than 400, the object of the present invention cannot be achieved.
以下の実施例で詳細に説明する。This will be explained in detail in the following examples.
(実施例)
円筒形状(直径30 m m、厚さ8 m m )の5
45C,80M420素材に各種の硬化処理を行い、外
周面にCrNのイオンブレーティング皮膜を形成し、パ
フ仕上げした後西原式ピッチング摩耗試験に供した。(Example) Cylindrical shape (diameter 30 mm, thickness 8 mm) 5
The 45C and 80M420 materials were subjected to various hardening treatments, a CrN ion blating film was formed on the outer peripheral surface, and after puff finishing, they were subjected to the Nishihara pitting abrasion test.
硬化処理として下記の3種とし、比較例として調質処理
を加えた。The following three types of hardening treatment were used, and tempering treatment was added as a comparative example.
(以下余白、次頁へ続く) 第1表 ℃に加熱される。(Margin below, continued on next page) Table 1 heated to ℃.
試験片の相手材は下記の組成で表面をチル化したもので
試験片と同一形状のものである。The mating material for the test piece had a chilled surface with the following composition and had the same shape as the test piece.
第2表
硬化処理した試験片の外周面に10μmのCrNのイオ
ンブレーティング皮膜を形成した後、皮膜直下の母材表
面硬さを測定しその分布を第1図に示す。尚、イオンブ
レーティング時に約400以上のようにして作製した試
験片で第1図(a)、(b)に示すような主機構の試験
装置で試験を行った。Table 2: After forming a 10 μm CrN ion-blating film on the outer peripheral surface of the hardened test piece, the surface hardness of the base material directly under the film was measured and its distribution is shown in FIG. Incidentally, a test was conducted using a test device having a main mechanism as shown in FIGS. 1(a) and 1(b) using test pieces prepared in a manner similar to about 400 or more during ion blating.
上下部試験片のうち上部試験片には本発明、及び比較例
の試験片とし、下部試験片には相手試験片とした。上部
試験片の回転数は166.5ppmとし、下部試験片の
回転数は185rpmで10%の滑りを生ずるようにし
た。滑り速度は0.39 m / s e cで、接触
荷重(ヘルツ最大応力)は80〜220kg/mm2と
した。機構上上部試験片に引張り、下部試験片には圧縮
の応力がかかるのでピッチング摩耗は上部試験片に起る
。Among the upper and lower test pieces, the upper test piece was the test piece of the present invention and the comparative example, and the lower test piece was the counterpart test piece. The rotation speed of the upper test piece was set to 166.5 ppm, and the rotation speed of the lower test piece was set to 185 rpm to produce 10% slippage. The sliding speed was 0.39 m/sec, and the contact load (Hertzian maximum stress) was 80 to 220 kg/mm2. Mechanically, tensile stress is applied to the upper test piece and compressive stress is applied to the lower test piece, so pitting wear occurs on the upper test piece.
ここにヘルツ最大応力PHは次の簡略式で示される。Here, the Hertzian maximum stress PH is expressed by the following simplified formula.
(効果)
本発明は、イオンブレーティング皮膜直下の母材硬さを
Hm V 400以上とすることにより、イオンブレー
ティング皮膜厚さが10μm以下でも耐ピッチング摩耗
性の優れた摺動部材を提供することができる。(Effects) The present invention provides a sliding member with excellent pitting wear resistance even when the ion blating film thickness is 10 μm or less by setting the base material hardness immediately below the ion brating film to Hm V 400 or more. be able to.
ここに、Wは荷重、Lは試験片の厚さ、Rは試験片の直
径、R1は上部試験片の直径、R2は下部試験片の直径
、Eはヤング率、Elは上部試験片のヤング率、R2は
下部試験片のヤング率である。Here, W is the load, L is the thickness of the test piece, R is the diameter of the test piece, R1 is the diameter of the upper test piece, R2 is the diameter of the lower test piece, E is Young's modulus, and El is Young's of the upper test piece. The modulus, R2, is the Young's modulus of the lower specimen.
前記4種の試験片の試験を行い第2図のような結果とな
った。The above four types of test pieces were tested and the results shown in Figure 2 were obtained.
試験結果から明らかなように、本発明のHm V 40
0を超える母材硬さを有するイオンブレーティング皮膜
の耐ピッチング疲労摩耗が優れていることが確認された
。As is clear from the test results, the Hm V 40 of the present invention
It was confirmed that the ion brazing film having a base material hardness of more than 0 has excellent pitting fatigue wear resistance.
第1図は西原式ピッチング摩耗試験装置の主機構を示し
くa)はその正面概略図、(b)はその側面概略図、第
2図は試験片の硬さの分布を示すグラフ、第3図は西原
式ピッチング摩耗試験のSN曲線を示すグラフ。
図中:l・・・上部試験片、2・・・下部試験片、W・
・・荷重、L・・・試験片の厚さ、R□・・・上部試験
片の直径、R2・・・下部試験片の直径、上部試験片の
ヤング率、R2・・・下部試験片のヤング率。Figure 1 shows the main mechanism of the Nishihara pitching wear test device; a) is a schematic front view thereof, (b) is a schematic side view thereof, Figure 2 is a graph showing the hardness distribution of the test piece, and Figure 3 is a diagram showing the distribution of hardness of the test piece. The figure is a graph showing the SN curve of the Nishihara pitching wear test. In the figure: l...upper test piece, 2...lower test piece, W.
...Load, L...Thickness of test piece, R□...Diameter of upper test piece, R2...Diameter of lower test piece, Young's modulus of upper test piece, R2...Diameter of lower test piece Young's modulus.
Claims (1)
層を形成した摺動部材であって、前記皮膜層直下の母材
硬さがHmV400以上であることを特徴とする耐ピッ
チング疲労摩耗性に優れた摺動部材。1. A sliding member having a metal nitride or metal carbide film layer formed on the surface of an iron-based base material, characterized in that the base material hardness immediately below the film layer is HmV400 or more. Sliding member with excellent properties.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24058788A JPH0286907A (en) | 1988-09-26 | 1988-09-26 | Sliding member excellent in pitting fatigue abrasion resistance property |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24058788A JPH0286907A (en) | 1988-09-26 | 1988-09-26 | Sliding member excellent in pitting fatigue abrasion resistance property |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0286907A true JPH0286907A (en) | 1990-03-27 |
Family
ID=17061733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24058788A Pending JPH0286907A (en) | 1988-09-26 | 1988-09-26 | Sliding member excellent in pitting fatigue abrasion resistance property |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0286907A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04121404U (en) * | 1991-04-18 | 1992-10-29 | 株式会社リケン | Shims for direct drive valve lifters |
JP2018114492A (en) * | 2017-01-17 | 2018-07-26 | フェルム アクチェンゲゼルシャフト | Discharge head for discharge device of tight sealing machine for tightly sealing container |
-
1988
- 1988-09-26 JP JP24058788A patent/JPH0286907A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04121404U (en) * | 1991-04-18 | 1992-10-29 | 株式会社リケン | Shims for direct drive valve lifters |
JP2018114492A (en) * | 2017-01-17 | 2018-07-26 | フェルム アクチェンゲゼルシャフト | Discharge head for discharge device of tight sealing machine for tightly sealing container |
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