JP3254909B2 - Internal-combustion engine tappet member having high joining strength with chip material - Google Patents

Internal-combustion engine tappet member having high joining strength with chip material

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Publication number
JP3254909B2
JP3254909B2 JP15149994A JP15149994A JP3254909B2 JP 3254909 B2 JP3254909 B2 JP 3254909B2 JP 15149994 A JP15149994 A JP 15149994A JP 15149994 A JP15149994 A JP 15149994A JP 3254909 B2 JP3254909 B2 JP 3254909B2
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JP
Japan
Prior art keywords
tappet
chip
tip
composition
combustion engine
Prior art date
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Expired - Fee Related
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JP15149994A
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Japanese (ja)
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JPH07332029A (en
Inventor
茂 岩田
正史 山田
Original Assignee
三菱マテリアル株式会社
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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】この発明は、炭化タングステン
(以下、WCで示す)基超硬合金で構成されたチップ材
を、これの液相焼結と同時に低合金鋼製タペット本体
に、強固な接合強度で接合してなる内燃機関タペット部
材に関するものである。
BACKGROUND OF THE INVENTION The present invention relates to a method of manufacturing a chip material made of tungsten carbide (hereinafter referred to as WC) based cemented carbide, simultaneously with the liquid phase sintering, into a low alloy steel tappet body. The present invention relates to a tappet member for an internal combustion engine which is joined at a joining strength.

【0002】[0002]

【従来の技術】従来、一般に、ディーゼルエンジンやガ
ソリンエンジンなどの内燃機関のタペット部材として、
例えば特開昭62−182406号公報に記載され、か
つ図1に概略縦断面図で例示されるように、通常冷間鍛
造で成形加工され、かつ炭素鋼や合金鋼などで構成され
たタペット本体1のカム当接面側の頂面1aに、金属の
炭化物、窒化物、およびほう化物のうちの1種以上とN
iまたはNi合金で構成されたチップ材2を、これの液
相焼結と同時に接合してなるタペット部材が知られてい
る。
2. Description of the Related Art Conventionally, tappet members of internal combustion engines such as diesel engines and gasoline engines have been generally used.
For example, as described in Japanese Patent Application Laid-Open No. Sho 62-182406 and illustrated in a schematic longitudinal sectional view in FIG. 1, a tappet body usually formed by cold forging and made of carbon steel, alloy steel, or the like. And at least one of metal carbides, nitrides, and borides and N
There is known a tappet member formed by joining a chip material 2 made of an i or Ni alloy simultaneously with liquid phase sintering thereof.

【0003】[0003]

【発明が解決しようとする課題】一方、近年の内燃機関
の高出力化および高性能化はめざましく、これに伴な
い、これの構造部材であるタペット部材はより一段と苛
酷な条件下での使用を余儀なくされる傾向にあるが、上
記の従来タペット部材においては、タペット本体とチッ
プ材との接合強度が十分でないために、苛酷な使用条件
下では、これら両者間に剥離が発生し易く、信頼性の点
で問題がある。
On the other hand, in recent years, the output and performance of an internal combustion engine have been remarkably increased, and accordingly, the tappet member, which is a structural member of the internal combustion engine, has been used under more severe conditions. In the conventional tappet member described above, the bonding strength between the tappet body and the tip material is not sufficient in the above-described conventional tappet member, so that under severe operating conditions, peeling is apt to occur between the two, and the reliability is low. There is a problem in the point.

【0004】[0004]

【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、上記の従来タペット部材に着目
し、これを構成するチップ材のタペット本体への接合強
度の向上をはかるべく研究を行なった結果、タペット本
体を、重量%で(以下、%は重量%を示す)、C:0.
13〜0.5%、 Si:0.15〜0.35%、
Mn:0.3〜1.2%、 Cr:0.4〜3.5
%、を含有し、さらに必要に応じて、Ni:0.4〜
4.5%、 Mo:0.15〜0.7%、のうちの
1種または2種、を含有し、残りがFeと不可避不純物
からなる組成を有する低合金鋼に特定すると共に、これ
のカム当接面側の頂面に、焼結と同時に接合されるチッ
プ材の焼結前の圧粉体の配合組成を、Co:20〜30
%、 Ni:3〜15%、(ただし、Co+N
i:25〜35%)、P:0.1〜1%、炭化クロム
(以下、Cr3 2 で示す):0.1〜10%、必要に
応じてFe:0.1〜3%、WC:残り、からなるもの
に特定すると、チップ材の焼結時に、タペット本体のS
iとチップ材を構成するPの相互作用でタペット本体へ
のチップ材のぬれ性が著しく向上するようになると共
に、チップ材の結合相を構成するCo+Ni中に固溶し
たCr3 2 の作用でチップ材のタペット本体への密着
性が著しく向上し、この結果焼結後のチップ材は、タペ
ット本体にきわめて強固に接合するようになり、かつ実
質的にWC基超硬合金で構成されるようになることか
ら、すぐれた耐摩耗性も具備するという研究結果を得た
のである。
Means for Solving the Problems Accordingly, the present inventors have
From the above viewpoint, the above-mentioned conventional tappet member was focused on, and as a result of researching to improve the joining strength of the tip material constituting the tappet member to the tappet body, the tappet body was weight% (hereinafter, referred to as “weight”). % Indicates% by weight), C: 0.
13-0.5%, Si: 0.15-0.35%,
Mn: 0.3-1.2%, Cr: 0.4-3.5
%, And optionally, Ni: 0.4 to
4.5%, Mo: 0.15 to 0.7%, one or two of which are specified, and the remainder is specified as a low alloy steel having a composition consisting of Fe and unavoidable impurities, and On the top surface on the cam contact surface side, the compounding composition of the green compact before sintering of the chip material to be joined simultaneously with sintering is represented by Co: 20 to 30.
%, Ni: 3 to 15% (however, Co + N
i: 25~35%), P: 0.1~1%, chromium carbide (hereinafter, indicated by Cr 3 C 2): 0.1~10% , optionally Fe: 0.1 to 3%, WC: When the tip material is sintered, the S
The interaction between i and P constituting the tip material significantly improves the wettability of the tip material to the tappet body, and the effect of Cr 3 C 2 dissolved in Co + Ni constituting the bonding phase of the tip material. As a result, the adhesiveness of the tip material to the tappet body is remarkably improved, and as a result, the tip material after sintering becomes extremely firmly bonded to the tappet body, and is substantially composed of a WC-based cemented carbide. As a result, the research result of having excellent wear resistance was obtained.

【0005】この発明は、上記の研究結果にもとづいて
なされたものであって、C:0.13〜0.5%、
Si:0.15〜0.35%、Mn:0.3〜1.2
%、 Cr:0.4〜3.5%、を含有し、さらに
必要に応じて、Ni:0.4〜4.5%、 Mo:
0.15〜0.7%、のうちの1種または2種、を含有
し、残りがFeと不可避不純物からなる組成を有する低
合金鋼製タペット本体のカム当接面側の頂面に、チップ
材として、Co:20〜30%、 Ni:3〜
15%、(ただし、Co+Ni:25〜35%)P:
0.1〜1%、Cr3 2 :0.1〜10%、必要に応
じてFe:0.1〜3%、WC:残り、からなる配合組
成の圧粉体を液相焼結接合してなる、チップ材が高い接
合強度を有する内燃機関タペット部材に特徴を有するも
のである。
[0005] The present invention has been made based on the above research results, wherein C: 0.13 to 0.5%,
Si: 0.15 to 0.35%, Mn: 0.3 to 1.2
%, Cr: 0.4-3.5%, and if necessary, Ni: 0.4-4.5%, Mo:
0.15 to 0.7% of the low-alloy steel tappet body containing one or two of the following components and having a balance of Fe and inevitable impurities, As a chip material, Co: 20 to 30%, Ni: 3 to
15% (however, Co + Ni: 25 to 35%) P:
Liquid phase sinter bonding of a green compact having a composition of 0.1 to 1%, Cr 3 C 2 : 0.1 to 10%, Fe: 0.1 to 3% as needed, WC: remaining The tapping member is characterized in that the tip material has a high joining strength.

【0006】つぎに、この発明のタペット部材におい
て、タペット本体の成分組成およびチップ材の配合組成
を上記の通りに限定した理由を説明する。 A.タペット本体の成分組成 (a) C C成分には、素地に固溶して強度を向上させる作用があ
るが、その含有量が0.13%未満では所望の強度向上
効果が得られず、一方その含有量が0.5%を越えると
靭性が低下するようになることから、その含有量を0.
13〜0.5%と定めた。なお、望ましくは0.2〜
0.3%の含有がよい。
Next, in the tappet member of the present invention, the reason why the component composition of the tappet body and the compounding composition of the tipping material are limited as described above will be described. A. Ingredient Composition of Tappet Body (a) C The C component has a function of improving the strength by forming a solid solution in a base material. However, if the content is less than 0.13%, a desired strength improving effect cannot be obtained. If the content exceeds 0.5%, the toughness will decrease.
It was determined to be 13 to 0.5%. Preferably, 0.2 to
The content of 0.3% is good.

【0007】(b) Si Si成分には、チップ材の焼結時に、チップ材中のPと
の共存作用でチップ材とのぬれ性を向上させ、もってチ
ップ材のタペット本体への密着性を向上させる作用があ
るが、その含有量が0.15%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0.35%を越え
ると強度が低下するようになることから、その含有量を
0.15〜0.35%と定めた。望ましくは0.2〜
0.3%の含有がよい。
(B) Si The Si component improves the wettability with the tip material by the coexistence of P in the tip material during sintering of the tip material, thereby improving the adhesion of the tip material to the tappet body. When the content is less than 0.15%, the desired effect cannot be obtained in the above-mentioned effect, while when the content exceeds 0.35%, the strength is reduced. The content was determined to be 0.15 to 0.35%. Desirably 0.2 ~
The content of 0.3% is good.

【0008】(c) Mn Mn成分には、素地に固溶して靭性を向上させる作用が
あるが、その含有量が0.3%未満では所望の靭性向上
効果が得られず、一方その含有量が1.2%を越えると
強度が急激に低下するようになることから、その含有量
を0.3〜1.2%と定めた。望ましくは0.7〜1%
の含有がよい。
(C) Mn The Mn component has a function of improving the toughness by forming a solid solution in the base material, but if its content is less than 0.3%, the desired effect of improving the toughness cannot be obtained. If the amount exceeds 1.2%, the strength rapidly decreases, so the content was determined to be 0.3 to 1.2%. Desirably 0.7-1%
Is good.

【0009】(d) Cr Cr成分には、素地に固溶して耐熱性を向上させる作用
があるが、その含有量が0.4%未満では所望の耐熱性
向上効果が得られず、一方その含有量が3.5%を越え
ると靭性が低下するようになることから、その含有量を
0.4〜3.5%と定めた。なお、望ましくは1〜3%
の含有がよい。
(D) Cr The Cr component has a function of improving the heat resistance by forming a solid solution in the base material, but if its content is less than 0.4%, the desired effect of improving the heat resistance cannot be obtained. If the content exceeds 3.5%, the toughness will decrease, so the content was determined to be 0.4 to 3.5%. Preferably, 1-3%
Is good.

【0010】(e) NiおよびMo これらの成分には、素地に固溶して強度を一段と向上さ
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、それぞれNi:0.4%未満およびMo:
0.15%未満では所望の強度向上効果が得られず、一
方その含有量がNi:4.5%およびMo:0.7%を
越えると靭性が低下するようになることから、その含有
量をNi:0.4〜4.5%、Mo:0.15〜0.7
%と定めた。なお、望ましくはNi:2〜3%、Mo:
0.3〜0.5%の含有がよい。
(E) Ni and Mo Since these components have a function of further improving the strength by forming a solid solution in the base material, they are contained as necessary. Less than 4% and Mo:
If it is less than 0.15%, the desired effect of improving the strength cannot be obtained, while if its content exceeds 4.5% Ni and 0.7% Mo, the toughness is reduced. Ni: 0.4 to 4.5%, Mo: 0.15 to 0.7
%. Preferably, Ni: 2-3%, Mo:
The content is preferably 0.3 to 0.5%.

【0011】B.チップ材の配合組成 (a) Co Co成分は、焼結を可能ならしめると共に、靭性を確保
するのに不可欠な成分であるが、その割合が20%未満
では前記の作用に所望の効果が得られず、一方その割合
が30%を越えると硬さが低下するようになることか
ら、その割合を20〜30%と定めた。なお、望ましく
は23〜25%の割合がよい。
B. Composition of chip material (a) Co The Co component is an essential component for enabling sintering and ensuring toughness, but if its ratio is less than 20%, the desired effect can be obtained in the above-mentioned operation. On the other hand, if the ratio exceeds 30%, the hardness decreases, so the ratio is set to 20 to 30%. The ratio is preferably 23 to 25%.

【0012】(b) Ni Ni成分には、Co成分との共存において、強度を向上
させる作用があるが、その割合が3%未満では所望の強
度向上効果が得られず、この場合NiとCoの合量が2
5%未満では上記のCoおよびNiによる作用に所望の
効果が得られず、一方Niの割合が15%を越えると靭
性が低下するようになり、しかもこの場合NiとCoの
合量が35%を越えると耐摩耗性が低下するようになる
ことから、Niの割合を3〜15%、望ましくは5〜7
%、NiとCoの合量を25〜35%、望ましくは28
〜32%と定めた。
(B) Ni The Ni component has an effect of improving the strength in the coexistence with the Co component. However, if the proportion is less than 3%, the desired effect of improving the strength cannot be obtained. Is 2
If it is less than 5%, the desired effects of the above-mentioned effects of Co and Ni cannot be obtained. On the other hand, if the proportion of Ni exceeds 15%, the toughness decreases, and in this case, the total amount of Ni and Co is 35%. Is exceeded, the abrasion resistance is reduced, so that the Ni content is 3 to 15%, preferably 5 to 7%.
%, The total amount of Ni and Co is 25 to 35%, preferably 28
3232%.

【0013】(c) P P成分には、焼結性を向上せしめて液相焼結を可能なら
しめると共に、タペット本体のSiとの共存作用でチッ
プ材のタペット本体へのぬれ性を向上させる作用がある
が、その割合が0.1%未満では前記作用に所望の効果
が得られず、一方その割合が1%を越えると脆化現象が
現われるようになることから、その割合を0.1〜1%
と定めた。なお、望ましくは0.3〜0.7%の割合が
よい。
(C) For the PP component, the sinterability is improved to enable liquid phase sintering, and the wettability of the tip material to the tappet body is improved by the coexistence of Si with the tappet body. If the ratio is less than 0.1%, the desired effect cannot be obtained, whereas if the ratio exceeds 1%, an embrittlement phenomenon appears. 1-1%
It was decided. The ratio is preferably 0.3 to 0.7%.

【0014】(d) Cr3 2 Cr3 2 成分には、結合相に固溶し、タペット本体の
Siおよびチップ材のPによるぬれ性向上効果と相まっ
て、チップ材のタペット本体への密着性を著しく向上さ
せる作用があるが、その割合が0.1%未満では前記作
用に所望の効果が得られず、一方その割合が10%を越
えると強度が低下するようになることから、その割合を
0.5〜10%と定めた。望ましくは4〜8%の割合が
よい。
(D) The Cr 3 C 2 Cr 3 C 2 component forms a solid solution with the binder phase and, together with the effect of improving the wettability by Si of the tappet body and P of the tip material, makes the tip material adhere to the tappet body. However, if the ratio is less than 0.1%, the desired effect cannot be obtained, and if the ratio exceeds 10%, the strength is reduced. The ratio was defined as 0.5-10%. Desirably, the ratio is 4 to 8%.

【0015】(e) Fe Fe成分には、結合相に固溶して、これの硬さを向上さ
せる作用があるので、必要に応じて含有されるが、その
割合が0.1%未満では所望の硬さ向上効果が得られ
ず、その割合が3%を越えると強度が低下するようにな
ることから、その割合を0.1〜3%と定めた。望まし
くは0.3〜1%の割合がよい。
(E) Fe The Fe component forms a solid solution in the binder phase and has the effect of improving its hardness. Therefore, the Fe component is contained as necessary. Since the desired effect of improving the hardness cannot be obtained, and if the ratio exceeds 3%, the strength decreases, the ratio is set to 0.1 to 3%. Desirably, the ratio is 0.3 to 1%.

【0016】[0016]

【実施例】つぎに、この発明のタペット部材を実施例に
より具体的に説明する。まず、いずれも冷間鍛造加工に
より図1に示される形状および外径:31mm×長さ:5
1mmの寸法を有し、かつそれぞれ表1に示される成分組
成の低合金鋼で構成されたタペット本体A〜Pを用意
し、またチップ材を形成するために、原料粉末として、
いずれも粒度が100メッシュ以下のWC粉末、Cr3
2 粉末、Co−P合金(P:35%含有)粉末、Fe
−P合金(P:25%含有)粉末、Fe粉末、Co粉
末、Ni粉末および黒鉛粉末を用い、これら原料粉末を
表2に示される配合組成に配合し、混合した後、5ton
/cm2 の圧力で直径:31mmφ×厚さ:3mmの寸法をも
った圧粉体a〜qをプレス成形し、これらの圧粉体a〜
qを、それぞれ表3に示される組合せでタペット本体A
〜Pのカム当接面側の頂面上に図示の通り載置し、この
状態で、真空中、1200〜1300℃の範囲内の所定
の温度に60分間保持の条件で前記圧粉体を焼結してチ
ップ材とすると共に、これをタペット本体に接合するこ
とにより本発明タペット部材1〜15および比較タペッ
ト部材1〜5をそれぞれ製造した。
Next, the tappet member of the present invention will be specifically described with reference to examples. First of all, the shape and outer diameter shown in FIG. 1 by cold forging were: 31 mm × length: 5
To prepare tappet bodies A to P having a dimension of 1 mm and made of low alloy steel having the component compositions shown in Table 1, respectively, and as a raw material powder for forming a chip material,
WC powder with a particle size of 100 mesh or less, Cr 3
C 2 powder, Co-P alloy (containing 35% P) powder, Fe
-Using a P alloy (containing 25% P) powder, Fe powder, Co powder, Ni powder and graphite powder, blending these raw material powders in the blending composition shown in Table 2 and mixing,
The compacts a to q having dimensions of diameter: 31 mm φ × thickness: 3 mm are press-formed at a pressure of / cm 2 , and these compacts a to q are compacted.
q is a combination of tappet bodies A in the combinations shown in Table 3, respectively.
PP is placed on the top surface on the cam contact surface side as shown in the figure, and in this state, the green compact is held under vacuum at a predetermined temperature in the range of 1200 to 1300 ° C. for 60 minutes. By sintering to a chip material and joining it to the tappet body, tappet members 1 to 15 of the present invention and comparative tappet members 1 to 5 were manufactured, respectively.

【0017】なお、比較タペット部材1〜5は、タペッ
ト本体とチップ材の接合強度に影響を及ぼす成分、すな
わちタペット本体のSi並びにチップ材のPおよびCr
3 2 のうちのいずれかの含有割合が、この発明の範囲
から低い方に外れたものである。
The comparative tappet members 1 to 5 are components that affect the bonding strength between the tappet body and the tip material, that is, Si of the tappet body and P and Cr of the tip material.
The content ratio of any one of 3 C 2 is out of the range of the present invention.

【0018】つぎに、この結果得られた各種のタペット
部材について、チップ材のビッカース硬さを測定すると
共に、これを6気筒12バルブ、8200cc、210馬
力のディーゼルエンジンに組込み、回転数:3000r.
p.m.、運転時間:200時間の高速回転条件で実機試験
を行ない、チップ材のカム摺動面における最大摩耗深さ
を測定すると共に、タペット本体へのチップ材の接合強
度を評価する目的で、これら両者の接合面を外周にそっ
て観察し、剥離が原因の割れ発生数を測定した。さらに
接合強度を評価する目的で、前記接合面の剪断強度も測
定した。これらの測定結果を表3に示した。
Next, the Vickers hardness of the tip material was measured for the various tappet members obtained as a result, and this was incorporated into a 6-cylinder, 12-valve, 8200 cc, 210 hp diesel engine.
pm, operation time: 200 hours of high-speed rotation conditions, actual machine tests were performed to measure the maximum wear depth of the tip material on the cam sliding surface and to evaluate the joining strength of the tip material to the tappet body. The joint surface between the two was observed along the outer periphery, and the number of cracks caused by peeling was measured. Further, for the purpose of evaluating the bonding strength, the shear strength of the bonding surface was also measured. Table 3 shows the results of these measurements.

【0019】[0019]

【表1】 [Table 1]

【0020】[0020]

【表2】 [Table 2]

【0021】[0021]

【表3】 [Table 3]

【0022】[0022]

【発明の効果】表1〜3に示される結果から、本発明タ
ペット部材1〜15は、いずれも高速運転にもかかわら
ず、チップ材のタペット本体からの剥離現象の発生な
く、すぐれた耐摩耗性を示すのに対して、比較タペット
部材1〜5に見られるように、タペット本体とチップ材
の接合に大きな影響を及ぼすタペット本体のSi並びに
チップ材のPおよびCr3 2 のうちのいずれかの含有
割合でもこの発明の範囲から低い方に外れると、これら
に強固な接合強度を確保することができないことが明ら
かである。上述のように、この発明のタペット部材は、
これを構成するチップ材がタペット本体のカム当接面側
の頂面に著しく強固に接合しているので、内燃機関の高
速化および高性能化に十分満足に対応でき、長期に亘っ
てすぐれた性能を発揮するのである。
As can be seen from the results shown in Tables 1 to 3, the tappet members 1 to 15 of the present invention have excellent abrasion resistance without causing a peeling phenomenon of the tip material from the tappet body despite high-speed operation. As shown in the comparative tappet members 1 to 5, any one of Si of the tappet body and P and Cr 3 C 2 of the tip material, which greatly affect the joining between the tappet body and the tip material, as shown in the comparative tappet members 1 to 5. It is clear that if the content ratio deviates from the range of the present invention to the lower side, a strong bonding strength cannot be secured to them. As described above, the tappet member of the present invention
Since the tip material constituting this is remarkably firmly joined to the top surface of the tappet body on the side of the cam abutting surface, it can sufficiently cope with high speed and high performance of the internal combustion engine, and is excellent for a long time. It demonstrates its performance.

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

【図1】内燃機関のタペット部材を例示する概略縦断面
図である。
FIG. 1 is a schematic longitudinal sectional view illustrating a tappet member of an internal combustion engine.

【符号の説明】[Explanation of symbols]

1 タペット本体、 1a タペット本体のカム当接面側の頂面、 2 チップ材。 1 Tappet body, 1a Top surface of tappet body on cam contact surface side, 2 Tip material.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI C22C 38/18 C22C 38/18 F01L 1/14 F01L 1/14 B // B23K 103:18 B23K 103:18 (56)参考文献 特開 昭60−39149(JP,A) 特開 平4−132806(JP,A) 特開 平3−294452(JP,A) 特開 昭50−9148(JP,A) 特開 昭53−80319(JP,A) 特開 昭60−63349(JP,A) (58)調査した分野(Int.Cl.7,DB名) B22F 7/00 - 7/08 B23K 20/00 - 20/227 F01L 1/14 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI C22C 38/18 C22C 38/18 F01L 1/14 F01L 1/14 B // B23K 103: 18 B23K 103: 18 (56) References JP-A-60-39149 (JP, A) JP-A-4-132806 (JP, A) JP-A-3-294452 (JP, A) JP-A-50-9148 (JP, A) JP-A-53-80319 (JP, A) JP-A-60-63349 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B22F 7 /00-7/08 B23K 20/00-20/227 F01L 1 /14

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 重量%で、 C:0.13〜0.5%、 Si:0.15〜0.
35%、 Mn:0.3〜1.2%、 Cr:0.4〜3.5
%、 を含有し、残りがFeと不可避不純物からなる組成を有
する低合金鋼製タペット本体のカム当接面側の頂面に、
チップ材として、 Co:20〜30%、 Ni:3〜15%、 (ただし、Co+Ni:25〜35%)、 P:0.1〜1%、 炭化クロム:0.5〜
10%、 炭化タングステン:残り、 からなる配合組成の圧粉体を液相焼結接合してなる、チ
ップ材が高い接合強度を有する内燃機関タペット部材。
C .: 0.13 to 0.5%, Si: 0.15 to 0.5% by weight.
35%, Mn: 0.3 to 1.2%, Cr: 0.4 to 3.5
%, And the remainder is composed of a low-alloy steel tappet body having a composition consisting of Fe and unavoidable impurities.
As a chip material, Co: 20 to 30%, Ni: 3 to 15%, (however, Co + Ni: 25 to 35%), P: 0.1 to 1%, chromium carbide: 0.5 to
10%, tungsten carbide: a tappet member for an internal combustion engine having a high joining strength, formed by liquid phase sintering a compact having a composition of:
【請求項2】 重量%で、 C:0.13〜0.5%、 Si:0.15〜0.
35%、 Mn:0.3〜1.2%、 Cr:0.4〜3.5
%、 を含有し、さらに、 Ni:0.4〜4.5%、 Mo:0.15〜0.
7%、 のうちの1種または2種、 を含有し、残りがFeと不可避不純物からなる組成を有
する低合金鋼製タペット本体のカム当接面側の頂面に、
チップ材として、 Co:20〜30%、 Ni:3〜15%、 (ただし、Co+Ni:25〜35%) P:0.1〜1%、 炭化クロム:0.1〜
10%、 炭化タングステン:残り、 からなる配合組成の圧粉体を液相焼結接合してなる、チ
ップ材が高い接合強度を有する内燃機関タペット部材。
2. C .: 0.13-0.5% by weight, Si: 0.15-0.
35%, Mn: 0.3 to 1.2%, Cr: 0.4 to 3.5
%, Ni: 0.4-4.5%, Mo: 0.15-0.4%.
7%, one or two of the following, and the remainder is composed of a low-alloy steel tappet body having a composition consisting of Fe and unavoidable impurities.
As a chip material, Co: 20 to 30%, Ni: 3 to 15%, (however, Co + Ni: 25 to 35%) P: 0.1 to 1%, chromium carbide: 0.1 to
10%, tungsten carbide: a tappet member for an internal combustion engine having a high joining strength, formed by liquid phase sintering a compact having a composition of:
【請求項3】 重量%で、 C:0.13〜0.5%、 Si:0.15〜0.
35%、 Mn:0.3〜1.2%、 Cr:0.4〜3.5
%、 を含有し、残りがFeと不可避不純物からなる組成を有
する低合金鋼製タペット本体のカム当接面側の頂面に、
チップ材として、 Co:20〜30%、 Ni:3〜15%、 (ただし、Co+Ni:25〜35%)、 P:0.1〜1%、 炭化クロム:0.1〜
10%、 Fe:0.1〜3%、 炭化タングステン:残り、 からなる配合組成の圧粉体を液相焼結接合してなる、チ
ップ材が高い接合強度を有する内燃機関タペット部材。
C .: 0.13 to 0.5%, Si: 0.15 to 0.5% by weight.
35%, Mn: 0.3 to 1.2%, Cr: 0.4 to 3.5
%, And the remainder is composed of a low-alloy steel tappet body having a composition consisting of Fe and unavoidable impurities.
As a chip material, Co: 20 to 30%, Ni: 3 to 15%, (however, Co + Ni: 25 to 35%), P: 0.1 to 1%, chromium carbide: 0.1 to
An internal combustion engine tappet member having a high joining strength with a chip material formed by liquid phase sintering of a compact having a composition of 10%, Fe: 0.1 to 3%, tungsten carbide: remaining.
【請求項4】 重量%で、 C:0.13〜0.5%、 Si:0.15〜0.
35%、 Mn:0.3〜1.2%、 Cr:0.4〜3.5
%、 を含有し、さらに、 Ni:0.4〜4.5%、 Mo:0.15〜0.
7%、 のうちの1種または2種、 を含有し、残りがFeと不可避不純物からなる組成を有
する低合金鋼製タペット本体のカム当接面側の頂面に、
チップ材として、 Co:20〜30%、 Ni:3〜15%、 (ただし、Co+Ni:25〜35%) P:0.1〜1%、 炭化クロム:0.1〜
10%、 Fe:0.1〜3%、 炭化タングステン:残り、 からなる配合組成の圧粉体を液相焼結接合してなる、チ
ップ材が高い接合強度を有する内燃機関タペット部材。
4. C .: 0.13 to 0.5% by weight, Si: 0.15 to 0.5% by weight.
35%, Mn: 0.3 to 1.2%, Cr: 0.4 to 3.5
%, Ni: 0.4 to 4.5%, Mo: 0.15 to 0.5%.
7%, one or two of the following, and the remainder is composed of a low-alloy steel tappet body having a composition consisting of Fe and unavoidable impurities.
As a chip material, Co: 20 to 30%, Ni: 3 to 15%, (however, Co + Ni: 25 to 35%) P: 0.1 to 1%, chromium carbide: 0.1 to
An internal combustion engine tappet member having a high joining strength with a chip material formed by liquid phase sintering of a compact having a composition of 10%, Fe: 0.1 to 3%, tungsten carbide: remaining.
JP15149994A 1994-06-09 1994-06-09 Internal-combustion engine tappet member having high joining strength with chip material Expired - Fee Related JP3254909B2 (en)

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JPH07332029A JPH07332029A (en) 1995-12-19
JP3254909B2 true JP3254909B2 (en) 2002-02-12

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