JPS62271914A - Sintered cam shaft - Google Patents

Sintered cam shaft

Info

Publication number
JPS62271914A
JPS62271914A JP8358186A JP8358186A JPS62271914A JP S62271914 A JPS62271914 A JP S62271914A JP 8358186 A JP8358186 A JP 8358186A JP 8358186 A JP8358186 A JP 8358186A JP S62271914 A JPS62271914 A JP S62271914A
Authority
JP
Japan
Prior art keywords
less
sintered
sintered alloy
assembly pieces
cam piece
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
Application number
JP8358186A
Other languages
Japanese (ja)
Inventor
Yoshiaki Fujita
善昭 藤田
Tomoji Kawai
智士 川合
Shunsuke Takeguchi
俊輔 竹口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Piston Ring Co Ltd
Original Assignee
Nippon Piston Ring Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Piston Ring Co Ltd filed Critical Nippon Piston Ring Co Ltd
Priority to JP8358186A priority Critical patent/JPS62271914A/en
Priority to GB8708020A priority patent/GB2189811B/en
Priority to DE19873712107 priority patent/DE3712107A1/en
Publication of JPS62271914A publication Critical patent/JPS62271914A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/02Making ferrous alloys by powder metallurgy
    • C22C33/0257Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%

Abstract

PURPOSE:To improve the workability and the wear and abrasion resistance of component material by specifying the components of sintered alloy such as C, P, S, Mn, Si, and Fe when making assembly pieces except a cam piece of the sintered alloy. CONSTITUTION:The components of sintered material for assembly pieces except a cam piece are specified as follows: C: 1.0-5.0%, P: 0.2-0.8%, S: 0.5% or less, Mn: 1.0% or less, Si: 2.0% or less, Fe as remainder in weight percentage. As the need arises, Mo: 0.1-2.0%, or separately from this, one component or more of Ni: 0.5-3.0%, Cr: 0.1-2.0%, B: 0.01-1.0%, Cu: 0.5-3.0% may be added to the said components. Thus, the assembly pieces made of the said sintered alloy can be improved in their wear and abrasion resistance, and also machinability.

Description

【発明の詳細な説明】 3、発明の詳細な説明 [産業上の利用分野] 本発明は内燃機関用のカムシャフト、詳しくはカムロブ
とジャーナルピースを共に焼結合金で形成し、スチール
シャフトに接合したカムシャフトに関する。
Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a camshaft for an internal combustion engine, specifically a cam lobe and a journal piece that are both made of a sintered alloy and joined to a steel shaft. Regarding the camshaft.

[従来技術] カムピース、ジャーナルピース等を個別に製作し、スチ
ールシャフトに接合するカムシャフトにおいて、カムピ
ース以外のジャーナル、ギア等の大部分は鋼材で製作さ
れている。しかし、鋼材は仕上げ加工が比較的容易な反
面、部品製作に要するFIO工の工程やろう付は等によ
りシャフトに接合する際の工程が多く、この種のカムシ
ャフトの製造コストを高いものにしていた。
[Prior Art] In a camshaft in which cam pieces, journal pieces, etc. are individually manufactured and joined to a steel shaft, most of the journals, gears, etc. other than the cam piece are manufactured from steel. However, while steel is relatively easy to finish, it requires many steps to join it to the shaft, such as FIO machining and brazing, which makes the manufacturing cost of this type of camshaft high. Ta.

また、摺動部材、特にジャーナルとして用いた場合には
耐摩耗性が低いという問題もめった。
Furthermore, when used as a sliding member, especially a journal, the problem of low wear resistance has often been encountered.

し発明の構成] 本発明は低いコストで製造できて、耐摩耗性が良好なカ
ムシャフトを提供することを目的とするものであって、
この目的は、カムピース以外の組付ピースを、重量比で
、C:1.0〜5.0%、P:0、2〜0.8%、S:
0.5%以下、Mn:1.0%以下、Si : 2.0
%以下、残部Feからなる焼結合金、もしくは、上記組
成に加えて、Ho:0.1〜2.0%、および/又はN
i: 0.5〜3.0%、Cr二0.1〜2.0%、B
:0.01〜1.0%、C0: 0.5〜3.0%のう
ちの1種または2種以上を含有する焼結合金で製造する
ことによって達成される。
[Structure of the Invention] An object of the present invention is to provide a camshaft that can be manufactured at low cost and has good wear resistance,
This purpose is to assemble the assembly pieces other than the cam piece in terms of weight ratio: C: 1.0 to 5.0%, P: 0, 2 to 0.8%, S:
0.5% or less, Mn: 1.0% or less, Si: 2.0
% or less, the balance is Fe, or in addition to the above composition, Ho: 0.1 to 2.0%, and/or N
i: 0.5-3.0%, Cr2 0.1-2.0%, B
C0: 0.01 to 1.0% and C0: 0.5 to 3.0%.

またこの焼結合金はパーライト基地組織中に炭化物と黒
鉛を分布せしめれば自己潤滑性と切削性が良好となる。
In addition, this sintered alloy has good self-lubricating properties and machinability when carbide and graphite are distributed in the pearlite base structure.

本発明のカムピース以外の組付ピースにおいて各成分の
数値を限定した理由は下記の通りである。
The reasons for limiting the numerical values of each component in the assembly pieces other than the cam piece of the present invention are as follows.

Cは土0〜5.0%の範囲で一部が基地に固溶して基地
を強化し、その他が炭化物もしくは炭化物と黒鉛を形成
するが、1.0%未満ではその効果が得られず耐摩耗性
、自己潤滑性が低下する。また5、0%を超えると炭化
物が粗大化し、さらにPと作用して過剰な液相を生じて
組付ピースとしての形状が保てない。
When C is in the range of 0 to 5.0%, part of it dissolves in the base and strengthens the base, and the rest forms carbide or graphite with carbide, but if it is less than 1.0%, this effect cannot be obtained. Wear resistance and self-lubricating properties decrease. Moreover, if it exceeds 5.0%, the carbide becomes coarse and further interacts with P to generate an excessive liquid phase, making it impossible to maintain the shape of the assembly piece.

PはFe−C−P共晶のステダイトを生じさせ耐摩耗性
に寄与するが、0.2%未満では添加効果かなく、0.
8%を超えると、析出するステダイト量が過多となって
被剛性が悪くなり、また脆化も進む。
P produces Fe-C-P eutectic steadite and contributes to wear resistance, but if it is less than 0.2%, there is no addition effect;
If it exceeds 8%, the amount of precipitated steadite becomes excessive, resulting in poor rigidity and further embrittlement.

SはS単体及び)In3の形で基地中へ分布することに
より快削成分として動き、切削性を向上させるが、0.
5%を超えると強度が著しく低下して脆化させる。また
焼結の進行も妨げる。
When S is distributed throughout the base in the form of S alone or )In3, it acts as a free-cutting component and improves machinability, but 0.
When it exceeds 5%, the strength decreases significantly and becomes brittle. It also hinders the progress of sintering.

Mnを1.0%以下にする理由は、!−1nが1.0%
を超えると、焼結の進行が抑制される結果、粗大な空孔
が残ることと、圧粉成形性も低下することによる。
The reason for keeping Mn below 1.0% is! -1n is 1.0%
If it exceeds this, the progress of sintering is suppressed, resulting in coarse pores remaining and powder formability also being reduced.

Siを2.0%以下にする理由は、Siが2.0%を超
えると、基地が脆化するほか、粉末の圧粉成形性が低下
し、焼結時の変形が大きくなることによる。
The reason for setting the Si content to 2.0% or less is that if the Si content exceeds 2.0%, the matrix becomes brittle, the compactability of the powder decreases, and deformation during sintering increases.

焼結条件によっては高温による液相焼結時に粒子間の拡
散が追従できず、表面付近にシワ、割れを生ずることが
ある。そのためl−1o80.1〜2.0%の範囲で添
加することにより拡散を助け、シワ、割れを防ぐことが
できる。0.1%未満ではこの効果が得られず、2.0
%を超えるとHo2 Gの形成や基地の強化により高度
が上昇し被削性が悪くなる6さらにまた、Ni : 0
.5〜3.0. Cr : 0.1〜2.0%、B:0
.01〜1.0%、Cu : 0.5〜3.0%のうち
の1種または2種以上を含んでも良く、摩耗が発生する
条件下で使用する部品に対してこれらの成分を適量添加
することにより、基地と炭化物の強化を図ることができ
る。しかし、各成分とも限定範囲を下回ると添加効果が
なく、また上限を超えると硬度が高くなり、被削性が低
下する。
Depending on the sintering conditions, diffusion between particles may not follow during liquid phase sintering at high temperatures, resulting in wrinkles and cracks near the surface. Therefore, by adding l-1o in a range of 80.1 to 2.0%, diffusion can be aided and wrinkles and cracks can be prevented. This effect cannot be obtained at less than 0.1%, and 2.0%
%, the altitude increases due to the formation of Ho2G and the strengthening of the base, resulting in poor machinability.6Furthermore, Ni: 0
.. 5-3.0. Cr: 0.1-2.0%, B: 0
.. 01 to 1.0%, Cu: 0.5 to 3.0%, and may contain one or more of 0.5 to 3.0%, and these components may be added in appropriate amounts to parts used under conditions where wear occurs. By doing so, it is possible to strengthen the base and carbide. However, if each component falls below a limited range, there will be no addition effect, and if it exceeds the upper limit, hardness increases and machinability decreases.

この焼結合金はC:1.5〜4.0%、P:0.4〜0
.7%の範囲内で焼結温度と時間を選択することによっ
て、パーライト基地中に炭化物と黒鉛を同時に含有する
組織を得ることができる。それによって、鋳鉄材料と同
じように黒鉛による自己潤滑作用で相手材に対する攻撃
性の少ない耐摩耗材料となる。またこれに伴ない切削性
も向上する。
This sintered alloy has C: 1.5-4.0%, P: 0.4-0
.. By selecting the sintering temperature and time within the range of 7%, a structure containing carbide and graphite simultaneously in the pearlite base can be obtained. As a result, like cast iron materials, the self-lubricating effect of graphite makes it a wear-resistant material that is less aggressive towards mating materials. In addition, machinability is also improved accordingly.

本発明の焼結カムシャフトは、上記焼結材料を圧粉成形
してスチールシャフトに組み付けた後、1050〜12
00’Cの温度で焼結接合するが、製造コストを低くす
るためには、組付ピース仝体が同一条件で接合させるこ
とが必要でおる。従ってカムピース用の焼結材料として
は、例えば特願昭58−140964号に開示されてい
る耐摩耗焼結合金(C:1.5%、s; : 0.5〜
1.2%、Nn:1.0%以下、P : 0.2〜0.
8%、Cr:2.0〜20%、)to:0.5〜2.5
%、Ni:05〜2.5%、残部Feおよび不純物)も
しくは、この焼結合金に、さらにSn、 Bi、 Sb
、 Coのうち1種または2種以上を0.01〜5.0
%含有した耐摩耗焼結合金を用いることが好ましい。
The sintered camshaft of the present invention is produced by compacting the sintered material and assembling it onto a steel shaft.
Sintering and joining is carried out at a temperature of 0.000'C, but in order to reduce manufacturing costs, it is necessary to join the assembly pieces under the same conditions. Therefore, as a sintered material for the cam piece, for example, a wear-resistant sintered alloy (C: 1.5%, s: 0.5~
1.2%, Nn: 1.0% or less, P: 0.2-0.
8%, Cr: 2.0-20%, )to: 0.5-2.5
%, Ni: 05-2.5%, balance Fe and impurities) or this sintered alloy is further supplemented with Sn, Bi, Sb.
, 0.01 to 5.0 of one or two or more of Co
It is preferable to use a wear-resistant sintered alloy containing %.

[実施例] 以下、実施例および比較例に基づき本発明の性能確認試
験結果を説明する。
[Example] Hereinafter, the performance confirmation test results of the present invention will be explained based on Examples and Comparative Examples.

第1表に示す通りカムピース以外の組付ピースとして、
No、1〜9の組成を有する本発明焼結合金、No、1
0.11の比較用焼結合金、及びNo。
As shown in Table 1, as assembly pieces other than cam pieces,
Sintered alloy of the present invention having a composition of No. 1 to 9, No. 1
0.11 comparative sintered alloy, and no.

12の比較用鋼材(30M440)からなる試験片を得
た。焼結合金については、4〜6t/cmのプレス面圧
でプレス成形後、アンモニア分解ガス雰囲気の炉に入れ
、1050〜1200’C(平均1120’Cの温度で
1〜2時間焼結した。鋼材は上記焼結合金と同一条件で
焼結炉を通して得たものを使用した。
Twelve test specimens made of comparative steel material (30M440) were obtained. The sintered alloy was press-formed with a press surface pressure of 4 to 6 t/cm, then placed in a furnace in an ammonia decomposition gas atmosphere, and sintered at a temperature of 1050 to 1200'C (average 1120'C) for 1 to 2 hours. The steel used was one obtained through a sintering furnace under the same conditions as the sintered alloy described above.

一摩耗試験一 各供試材について表面硬さを測定するとともにアムスラ
一式摩耗試験を行なった。供試材を平面接触滑り摩耗試
験機における回転片とし、これら回転片をA1合金によ
って製作された平板状試料(相手材)の固定片に接触し
、その接触面に対し常時潤滑油を供給しつつ回転させた
1. Abrasion Test 1. The surface hardness of each sample material was measured and an Amsura set abrasion test was conducted. The test material is a rotating piece in a plane contact sliding wear tester, and these rotating pieces are brought into contact with a fixed piece of a flat sample (mate material) made of A1 alloy, and lubricating oil is constantly supplied to the contact surface. I rotated it.

試験条件は以下の通りである。The test conditions are as follows.

回転片外径・・・φ4Qmm、潤滑油・・・10W−3
0、油温−80’C1油!−0,5f/min 、荷重
・・・100KJf、すべり速度”−2,5m/SeC
、走行時間・・・150時間。
Rotating piece outer diameter...φ4Qmm, lubricating oil...10W-3
0, oil temperature -80'C1 oil! -0.5f/min, load...100KJf, sliding speed "-2.5m/SeC
, driving time...150 hours.

第1表に示される通り、本発明焼結合金は相手材ととも
に、比較材に比して摩耗量の著しい減少を示した。
As shown in Table 1, the sintered alloy of the present invention, together with its counterpart material, showed a significant reduction in the amount of wear compared to the comparative material.

一加エチップ寿命試験− 各供試材を直径48#、厚ざ25#の円柱状に加工し、
バイトチップを用いた旋盤によって切削してチップ寿命
を測定した。
Single-chip life test - Process each sample material into a cylinder with a diameter of 48# and a thickness of 25#,
The tip life was measured by cutting with a lathe using a bite tip.

試験条件は以下の通りである。The test conditions are as follows.

ワーク回転数・・・800rpm、送り速度・・・0.
32rev、収り代・・・1#、水溶性切削剤使用。
Work rotation speed: 800 rpm, feed speed: 0.
32rev, storage allowance...1#, water-soluble cutting agent used.

1個のチップで取り代11runの切削が可能な回数を
比較したが、第1表に示される通り、本発明焼結合金を
切削した場合、バイトチップは著しく長い寿命で使用で
きることが示された。
A comparison was made of the number of times that a single tip can cut with a machining allowance of 11 runs, and as shown in Table 1, it was shown that the bite tip could be used for a significantly longer life when cutting the sintered alloy of the present invention. .

第1図と第2図に本発明のカムピース以外の組付ピース
としての焼結合金の顕微鏡組織写真(ナイタール液腐蝕
、200倍)を示す。
FIGS. 1 and 2 show microscopic photographs (nital liquid corrosion, 200x magnification) of sintered alloys as assembly pieces other than the cam piece of the present invention.

第1図は、第1表のNo、2の組成の焼結合金を110
0〜1130’C,1〜1.5時間で焼結して得られた
ものであり、パーライト基地(A)中に耐摩耗性に寄与
する網目状の炭化物(B)(セメンタイトとステダイト
)と被削性と潤滑性を良好にする黒鉛(C)が分布して
いる。
Figure 1 shows the sintered alloy with composition No. 2 in Table 1.
It is obtained by sintering at 0 to 1130'C for 1 to 1.5 hours, and contains network-like carbides (B) (cementite and steadite) that contribute to wear resistance in the pearlite base (A). Graphite (C) is distributed to improve machinability and lubricity.

第2図は、第1表のNo、1の組成の焼結合金を113
0〜1160’C,1,2〜1.7時間で焼結して得ら
れたものであり、パーライト基地(A)中に網目状の炭
化物(B)が分布している。
Figure 2 shows the sintered alloy with the composition No. 1 in Table 1.
It was obtained by sintering at 0 to 1160'C for 1.2 to 1.7 hours, and network-like carbide (B) is distributed in the pearlite base (A).

[発明の効果] 以上述べたように、本発明の焼結カムシャフトは、−回
の焼結処理でシャフトに結合できて耐摩耗性にも優れた
焼結合金の組付ピースを用いるものであり、特にカムピ
ース以外の組付ピースには被削性の良好な焼結合金を配
したので生産性の優れたカムシャフトである。
[Effects of the Invention] As described above, the sintered camshaft of the present invention uses an assembly piece of a sintered alloy that can be joined to the shaft with -1 sintering process and has excellent wear resistance. This is a camshaft with excellent productivity, especially since the assembly pieces other than the cam piece are made of sintered alloy with good machinability.

【図面の簡単な説明】[Brief explanation of drawings]

第1図と第2図は、本発明のカムピース以外の組付ピー
スとしての焼結合金の金属組織顕微鏡組織写真である。
FIGS. 1 and 2 are photographs of the metallographic microstructure of a sintered alloy as an assembly piece other than the cam piece of the present invention.

Claims (4)

【特許請求の範囲】[Claims] (1)カムピース以外の組付ピースが、重量比でC:1
.0〜5.0%、P:0.2〜0.8%、S:0.5%
以下、Mn:1.0%以下、Si:2.0%以下、を含
有し、残部Feからなる焼結合金で形成される焼結カム
シャフト。
(1) Assembly pieces other than the cam piece have a weight ratio of C:1
.. 0-5.0%, P: 0.2-0.8%, S: 0.5%
Hereinafter, a sintered camshaft formed of a sintered alloy containing Mn: 1.0% or less, Si: 2.0% or less, and the balance consisting of Fe.
(2)カムピース以外の組付ピースが、重量比でC:1
.0〜5.0%、P:0.2〜0.8%、S:0.5%
以下、Mn:1.0%以下、Si:2.0%以下、Mo
:0.1〜2.0%、を含有し、残部Feからなる焼結
合金で形成される焼結カムシャフト。
(2) Assembly pieces other than the cam piece have a weight ratio of C:1
.. 0-5.0%, P: 0.2-0.8%, S: 0.5%
Below, Mn: 1.0% or less, Si: 2.0% or less, Mo
:0.1 to 2.0%, and the balance is Fe.
(3)カムピース以外の組付ピースが、重量比でC:1
.0〜5.0%、P:0.2〜0.8%、S:0.5%
以下、Mn:1.0%以下、Si:2.0%以下、を含
有し、さらにNi:0.5〜3.0%、Cr:0.1〜
2.0%、B:0.01〜1.0%、Cu:0.5〜3
.0%のうちの1種または2種以上、を含有し、残部F
eからなる焼結合金で形成される焼結カムシャフト。
(3) Assembly pieces other than the cam piece have a weight ratio of C:1
.. 0-5.0%, P: 0.2-0.8%, S: 0.5%
The following contains Mn: 1.0% or less, Si: 2.0% or less, and further includes Ni: 0.5 to 3.0%, and Cr: 0.1 to
2.0%, B: 0.01-1.0%, Cu: 0.5-3
.. Contains one or more of 0%, and the remainder F
A sintered camshaft made of a sintered alloy made of e.
(4)カムピース以外の組付ピースが、重量比でC:1
.0〜5.0%、P:0.2〜0.8%、S:0.5%
以下、Mn:1.0%以下、Si:2.0%以下、Mo
:0.1〜2.0%、を含有し、さらにNi:0.5〜
3.0%、Cr:0.1〜2.0%、B:0.01〜1
.0%、Cu:0.5〜3.0%のうちの1種または2
種以上、を含有し、残部Feからなる焼結合金で形成さ
れる焼結カムシャフト。
(4) Assembly pieces other than the cam piece have a weight ratio of C:1
.. 0-5.0%, P: 0.2-0.8%, S: 0.5%
Below, Mn: 1.0% or less, Si: 2.0% or less, Mo
:0.1 to 2.0%, and further contains Ni:0.5 to 2.0%.
3.0%, Cr: 0.1-2.0%, B: 0.01-1
.. 0%, Cu: one or two of 0.5 to 3.0%
A sintered camshaft formed of a sintered alloy containing at least 100% of Fe, with the remainder being Fe.
JP8358186A 1986-04-11 1986-04-11 Sintered cam shaft Pending JPS62271914A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8358186A JPS62271914A (en) 1986-04-11 1986-04-11 Sintered cam shaft
GB8708020A GB2189811B (en) 1986-04-11 1987-04-03 Sintered cam shaft
DE19873712107 DE3712107A1 (en) 1986-04-11 1987-04-10 SINTERED CONTROL SHAFT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8358186A JPS62271914A (en) 1986-04-11 1986-04-11 Sintered cam shaft

Publications (1)

Publication Number Publication Date
JPS62271914A true JPS62271914A (en) 1987-11-26

Family

ID=13806458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8358186A Pending JPS62271914A (en) 1986-04-11 1986-04-11 Sintered cam shaft

Country Status (3)

Country Link
JP (1) JPS62271914A (en)
DE (1) DE3712107A1 (en)
GB (1) GB2189811B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3633879A1 (en) * 1986-10-04 1988-04-14 Supervis Ets HIGH-WEAR-RESISTANT IRON-NICKEL-COPPER-MOLYBDAEN-SINTER ALLOY WITH PHOSPHORUS ADDITIVE
CN105618761A (en) * 2014-11-05 2016-06-01 株式会社瑞进凸轮轴 Sintering body suitable for sintering connection

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763658A (en) * 1980-10-03 1982-04-17 Kawasaki Steel Corp Manufacture of sintered machine parts with superior specific strength
JPS583901A (en) * 1981-07-01 1983-01-10 Toyota Motor Corp Manufacture of sliding member
JPS583950A (en) * 1981-07-01 1983-01-10 Toyota Motor Corp Ohc type valve system
JPS58107470A (en) * 1981-12-19 1983-06-27 Kawasaki Steel Corp Preparation of sintered parts
JPS6033343A (en) * 1983-08-03 1985-02-20 Nippon Piston Ring Co Ltd Wear resistance sintered alloy

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1576143A (en) * 1977-07-20 1980-10-01 Brico Eng Sintered metal articles
JPS55145151A (en) * 1979-04-26 1980-11-12 Nippon Piston Ring Co Ltd Wear resistant sintered alloy material for internal combustion engine
JPS5813619B2 (en) * 1979-05-17 1983-03-15 日本ピストンリング株式会社 Wear-resistant iron-based sintered alloy material for internal combustion engines
JPS5918463B2 (en) * 1980-03-04 1984-04-27 トヨタ自動車株式会社 Wear-resistant sintered alloy and its manufacturing method
JPS5837158A (en) * 1981-08-27 1983-03-04 Toyota Motor Corp Wear resistant sintered alloy
JPS5925959A (en) * 1982-07-28 1984-02-10 Nippon Piston Ring Co Ltd Valve seat made of sintered alloy
JPS6033344A (en) * 1983-08-03 1985-02-20 Nippon Piston Ring Co Ltd Wear resistance sintered alloy
GB2153850B (en) * 1984-02-07 1987-08-12 Nippon Piston Ring Co Ltd Method of manufacturing a camshaft
JPH0610321B2 (en) * 1985-06-17 1994-02-09 日本ピストンリング株式会社 Abrasion resistant sintered alloy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763658A (en) * 1980-10-03 1982-04-17 Kawasaki Steel Corp Manufacture of sintered machine parts with superior specific strength
JPS583901A (en) * 1981-07-01 1983-01-10 Toyota Motor Corp Manufacture of sliding member
JPS583950A (en) * 1981-07-01 1983-01-10 Toyota Motor Corp Ohc type valve system
JPS58107470A (en) * 1981-12-19 1983-06-27 Kawasaki Steel Corp Preparation of sintered parts
JPS6033343A (en) * 1983-08-03 1985-02-20 Nippon Piston Ring Co Ltd Wear resistance sintered alloy

Also Published As

Publication number Publication date
GB8708020D0 (en) 1987-05-07
GB2189811B (en) 1989-12-06
DE3712107A1 (en) 1987-10-22
GB2189811A (en) 1987-11-04
DE3712107C2 (en) 1993-09-16

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