JP3248407B2 - Internal combustion engine tappet member with strong bonding of chip material - Google Patents

Internal combustion engine tappet member with strong bonding of chip material

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Publication number
JP3248407B2
JP3248407B2 JP26224795A JP26224795A JP3248407B2 JP 3248407 B2 JP3248407 B2 JP 3248407B2 JP 26224795 A JP26224795 A JP 26224795A JP 26224795 A JP26224795 A JP 26224795A JP 3248407 B2 JP3248407 B2 JP 3248407B2
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JP
Japan
Prior art keywords
tappet
composition
tip
chip
carbide
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.)
Expired - Fee Related
Application number
JP26224795A
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Japanese (ja)
Other versions
JPH0978196A (en
Inventor
茂 岩田
正史 山田
幹和 小林
利治 松井
憲一 宮内
Original Assignee
三菱マテリアル株式会社
三菱自動車工業株式会社
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Description

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

【0001】[0001]

【発明の属する技術分野】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
材を低合金鋼製タペット本体に、強固に拡散接合してな
る内燃機関タペット部材に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tappet member for an internal combustion engine in which a tip material made of tungsten carbide (hereinafter, referred to as WC) -based cemented carbide is firmly diffusion-bonded to a low-alloy steel tappet body. It is about.

【0002】[0002]

【従来の技術】従来、一般に、ヂ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Ni
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, as a tappet member of an internal combustion engine such as a diesel engine or a gasoline engine, for example, as described in Japanese Patent Application Laid-Open No. 62-182406 and as schematically illustrated in FIG. The top surface 1a on the cam contact surface side of the tappet body 1 which is usually formed by cold forging and is made of carbon steel, alloy steel or the like has one of metal carbides, nitrides, and borides. Seeds and Ni
Alternatively, there is known a tappet member formed by joining a chip material 2 made of a Ni alloy and liquid phase sintering thereof at the same time.

【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、タペット部材を構成するチップ
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%、 S
i: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、 Co:25〜30%、 P:0.1〜1%、 炭化クロム(以下、Cr3 2 で示す):0.5〜10%、 必要に応じてFe:0.1〜3%、 WC:残り、 からなる配合組成の焼結体からなるWC基超硬合金製チ
ップ材を拡散接合すると、この結果のタペット部材にお
いては、タペット本体のSiとチップ材を構成するPの
相互作用で拡散接合時における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、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WC基超硬合金が硬質であることか
ら、すぐれた耐摩耗性も具備するようになるという研究
結果を得たのである。
Means for Solving the Problems Accordingly, the present inventors have
From the above-mentioned viewpoints, as a result of conducting research to improve the joining strength of the tip material constituting the tappet member to the tappet body, the tappet body was determined by weight% (hereinafter,%
Indicates weight%), C: 0.13 to 0.5%, S
i: 0.15 to 0.35%, Mn: 0.3 to 1.2%, Cr: 0.4 to 3.5%, and, if necessary, Ni: 0.4 to 4 0.5%, Mo: 0.15 to 0.7%, and the remainder is specified as a low alloy steel having a composition of Fe and unavoidable impurities, and a cam of the low alloy steel. the top surface of the contact surface side, Co: 25~30%, P: 0.1~1%, chromium carbide (hereinafter, indicated by Cr 3 C 2): 0.5~10% , Fe if necessary When the tip material made of a WC-based cemented carbide made of a sintered body having a composition composition of 0.1 to 3%, WC: remaining, is diffusion-bonded, in the resulting tappet member, Si of the tappet body and the tip material are obtained. The wettability of the tip material to the tappet body during diffusion bonding is significantly improved by the interaction of P constituting Both were adhesion improving significantly to the tappet body of the chip material by the action of the Cr 3 C 2 was dissolved in Co constituting the binder phase of the chip material, the chip material, to very firmly bonded to the tappet body And the WC-based cemented carbide is hard, so that a study result was obtained that the WC-based cemented carbide also has excellent wear resistance.

【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、 Co:25〜35%、 P:0.1〜1%、 Cr3 2 :0.5〜10%、 必要に応じてFe:0.1〜3%、 WC:残り、 からなる配合組成の焼結体からなるWC基超硬合金製チ
ップ材を拡散接合してなる、チップ材の接合が強固な内
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 0.2%, Cr: 0.4 to 3.5%, and, if necessary, Ni: 0.4 to 4.5%, Mo: 0.15 to 0.7%. One or two kinds, and the remainder is composed of a low-alloy steel tappet body having a composition of Fe and inevitable impurities, on the top surface on the cam contact surface side, Co: 25 to 35%, P: 0.1 ~1%, Cr 3 C 2: 0.5~10%, optionally Fe: 0.1 to 3%, WC: remainder, consisting of a sintered body of blend composition consisting of WC-based cemented carbide tip The present invention is characterized in that an internal combustion engine tappet member is formed by diffusion bonding materials and has a strong bonding of a chip material.

【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〜
0.4%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
A content of 0.4% is good.

【0007】(b) Si Si成分には、拡散接合時に、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0.1
5〜0.35%と定めた。望ましくは0.2〜0.3%
の含有がよい。
(B) Si The Si component has the effect of improving the wettability with the tip material by the coexistence of P in the tip material during the diffusion bonding, thereby improving the adhesion of the tip material to the tappet body. There is,
If the content is less than 0.15%, the desired effect cannot be obtained in the above-mentioned action, while if the content exceeds 0.35%, the strength is reduced.
It was determined as 5 to 0.35%. Desirably 0.2-0.3%
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。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%. Desirably, the content is 1 to 3%.

【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成分には結合相を形成して強度および靭性を向上さ
せる作用があるが、その割合が、25%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35%を越
えると硬さが急激に低下し、耐摩耗性の低下が避けられ
ないことから、その割合を25〜35%と定めた。な
お、望ましくは28〜32%の割合がよい。
B. Composition of chip material (a) Co The Co component has the effect of forming a binder phase and improving the strength and toughness. If the proportion is less than 25%, the desired effect cannot be obtained. If the ratio exceeds 35%, the hardness rapidly decreases, and a decrease in wear resistance is inevitable. Therefore, the ratio is set to 25 to 35%. Note that the ratio is preferably 28 to 32%.

【0012】(b) 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との共存作用で拡散
接合時における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。
(B) The PP component improves the sinterability and enables liquid phase sintering, and coexists with the Si of the tappet body to wet the tip material into the tappet body during diffusion bonding. However, if the ratio is less than 0.1%, the desired effect cannot be obtained, and if the ratio exceeds 1%, the embrittlement phenomenon appears. The ratio was defined as 0.1-1%. Preferably, 0.3
A ratio of ~ 0.7% is good.

【0013】(c) Cr3 2 Cr3 2 成分には、結合相に固溶し、拡散接合時にお
けるタペット本体の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.
5%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。
(C) Cr 3 C 2 The Cr 3 C 2 component forms a solid solution with the binder phase, and is combined with Si of the tappet body and the effect of improving the wettability by the P of the tip material during diffusion bonding. It has an effect of remarkably improving the adhesion to the main body, but the ratio is 0.1%.
If the content is less than 5%, the desired effect cannot be obtained, and if the content exceeds 10%, the strength decreases. Therefore, the content is set to 0.5 to 10%. Desirably, the ratio is 4 to 8%.

【0014】(d) 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。
(D) Fe Since the Fe component has a function of improving the hardness by forming a solid solution in the binder phase, it is contained as necessary. Since the desired effect of improving the hardness cannot be obtained and the strength whose ratio exceeds 3% decreases, the ratio is set to 0.1 to 3%. Desirably, the ratio is 0.3 to 1%.

【0015】また、この発明のタペット部材は、一般
に、上記の低合金鋼製タペット本体のカム当接面側の頂
面に、上記のWC基超硬合金製チップ材を載置した状態
で、これに真空中または還元性雰囲気中、あるいは非酸
化性雰囲気中、1200〜1300℃の温度に30〜1
20分間保持後冷却の条件で拡散接合処理を施し、つい
で通常の滲炭ガス雰囲気中、850〜900℃の温度に
150〜200分間保持後、油温:120〜140℃の
油中に浸漬の油焼入れと、大気中、150〜200℃の
温度に100〜150分間保持の焼戻しの熱処理を施す
ことによって製造される。
Further, the tappet member of the present invention generally has the above-mentioned WC-based cemented carbide tip material placed on the top surface of the above-mentioned low alloy steel tappet body on the cam contact surface side. In a vacuum or reducing atmosphere, or in a non-oxidizing atmosphere, a temperature of 1200 to 1300 ° C.
After holding for 20 minutes, a diffusion bonding process is performed under cooling conditions, and then, in a normal carburizing gas atmosphere, at a temperature of 850 to 900 ° C. for 150 to 200 minutes, and then immersed in oil having an oil temperature of 120 to 140 ° C. It is manufactured by performing oil quenching and heat treatment of tempering in air at a temperature of 150 to 200 ° C. for 100 to 150 minutes.

【0016】[0016]

【発明の実施の形態】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:51mm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、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、5to
n /cm2 の圧力で直径:31mmφ×厚さ:3mmの寸法を
もった圧粉体にプレス成形し、これらの圧粉体を、1×
10-2torrの真空中、1200〜1300℃の範囲内の
所定の温度に60分間保持の条件で焼結して、いずれも
95%以上の理論密度比を有する焼結体からなるWC基
超硬合金で構成されたチップ材a〜qをそれぞれ製造し
た。ついで、これらのチップ材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に載置し、この状態で、1×10-2
torrの真空中、温度:1250℃に80分間保持後、窒
素ガス吹付けによる強制冷却の拡散接合処理を行ない、
ついで通常の滲炭ガス雰囲気中、温度:880℃に18
0分保持後、油温:130℃の油中に浸漬の油焼入れ
と、大気中、温度:180℃に120分保持の焼戻しの
熱処理を施す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。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the tappet member of the present invention will be specifically described with reference to embodiments. First of all, the shape and outer diameter shown in FIG.
× Length: Tappet bodies A to 51 having dimensions of 51 mm and made of low alloy steel having the component compositions shown in Table 1, respectively.
In order to prepare P and form a chip material, WC powder, Cr 3 C 2 powder, Co-P alloy (containing 35% P) having a particle size of 100 mesh or less are used as raw material powders.
Powder, Fe-P alloy (containing 25% P) powder, Fe powder, Co powder, and graphite powder, and these raw material powders were blended into the blending composition shown in Table 2 and mixed.
diameter under a pressure of n / cm 2: 31mm φ × thickness: was press molded into a green compact having a size of 3 mm, these compact, 1 ×
In a vacuum of 10 -2 torr, sintering is performed at a predetermined temperature in the range of 1200 to 1300 ° C. for 60 minutes, and each of them is a WC-based super sintered body having a theoretical density ratio of 95% or more. Chip materials a to q each made of a hard alloy were manufactured. Next, these tip materials a to q are mounted as shown in the drawing on the top surfaces of the tappet bodies A to P on the cam contact surface side in combinations shown in Table 3, and in this state, 1 × 10 − Two
After holding at a temperature of 1250 ° C. for 80 minutes in a vacuum of torr, diffusion bonding treatment of forced cooling by blowing nitrogen gas was performed,
Then, in a normal carburizing gas atmosphere, the temperature: 880 ° C. and 18
After holding for 0 minutes, the tappet members 1 to 15 of the present invention and comparative tappet members are subjected to oil quenching immersed in oil having an oil temperature of 130 ° C. and tempering in air at 180 ° C. for 120 minutes. 1 to 5 were each manufactured.

【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
わちペレット本体の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, ie, Si in the pellet body and P and Cr in 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 Reference Signs List 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 38/44 C22C 38/44 F01L 1/14 F01L 1/14 B (72)発明者 小林 幹和 神奈川県川崎市中原区大倉町10番地 三 菱自動車工業株式会社内 (72)発明者 松井 利治 神奈川県川崎市中原区大倉町10番地 三 菱自動車工業株式会社内 (72)発明者 宮内 憲一 神奈川県川崎市中原区大倉町10番地 三 菱自動車工業株式会社内 (56)参考文献 特開 昭63−299874(JP,A) 特開 平3−291361(JP,A) 特開 平3−146297(JP,A) 特公 平6−63054(JP,B2) 特公 平5−12420(JP,B2) (58)調査した分野(Int.Cl.7,DB名) C22C 38/00 301 C22C 38/00 304 B23K 20/00 310 C22C 29/08 C22C 38/18 C22C 38/44 F01L 1/14 ────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 7 Identification symbol FI C22C 38/44 C22C 38/44 F01L 1/14 F01L 1/14 B (72) Inventor Mikikazu Kobayashi Okura, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture No. 10 in the Mitsubishi Motors Corporation (72) Inventor Toshiharu Matsui 10 in Okura-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Within Mitsui Automotive Industry Co., Ltd. (72) Kenichi Miyauchi 10 in Okura-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Address: Mitsubishi Motors Corporation (56) References JP-A-63-299874 (JP, A) JP-A-3-291361 (JP, A) JP-A-3-146297 (JP, A) JP-B-6 -63054 (JP, B2) JP 5-12420 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) C22C 38/00 301 C22C 38/00 304 B23K 20/00 310 C22C 29/08 C22C 38/18 C22C 38/44 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、 Co: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焼結体からなる炭化タングステン基
超硬合金製チップ材を拡散接合してなる、チップ材の接
合が強固な内燃機関タペット部材。
C .: 0.13-0.5%, Si: 0.15-0.35%, Mn: 0.3-1.2%, Cr: 0.4-3. 5%, Co: 25 to 35%, P: 0.1 to 1% on the top surface on the cam contact surface side of the low alloy steel tappet body having a composition consisting of Fe and unavoidable impurities. Chromium carbide: 0.5 to 10%, Tungsten carbide: Remainder, Tungsten carbide-based cemented carbide chip material consisting of a sintered body having a composition of: Engine tappet members.
【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、 Co: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配合組成の焼結体からなる炭化タン
グステン基超硬合金製チップ材を拡散接合してなる、チ
ップ材の接合が強固な内燃機関タペット部材。
2. In% by weight, C: 0.13-0.5%, Si: 0.15-0.35%, Mn: 0.3-1.2%, Cr: 0.4-3. Ni: 0.4 to 4.5%, Mo: 0.15 to 0.7%, and one or two of the following, with the balance being Fe and unavoidable impurities. Co: 25 to 35%, P: 0.1 to 1%, Chromium carbide: 0.5 to 10%, Tungsten carbide on the top surface of the low-alloy steel tappet body having a composition consisting of: : An internal combustion engine tappet member having a strong bonding of the tip material, formed by diffusion bonding of a tungsten carbide-based cemented carbide tip material made of a sintered body having a composition 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、 Co:25〜35%、 P:0.1〜1%、 炭化クロム:0.5〜10%、Fe:0.1〜3%、 炭化タングステン:残り、 からなる配合組成の焼結体からなる炭化タングステン基
超硬合金製チップ材を拡散接合してなる、チップ材の接
合が強固な内燃機関タペット部材。
3. In% by weight, C: 0.13-0.5%, Si: 0.15-0.35%, Mn: 0.3-1.2%, Cr: 0.4-3. 5%, Co: 25 to 35%, P: 0.1 to 1% on the top surface on the cam contact surface side of the low alloy steel tappet body having a composition consisting of Fe and unavoidable impurities. Chromium carbide: 0.5 to 10%, Fe: 0.1 to 3%, Tungsten carbide: Remainder, formed by diffusion bonding of a tungsten carbide-based cemented carbide chip made of a sintered body having a composition of: , A tappet member for an internal combustion engine with strong bonding of the tip material.
【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、 Co:25〜35%、 P:0.1〜1%、 炭化クロム:0.5〜10%、Fe:0.1〜3%、 炭化タングステン:残り、 からなる配合組成の焼結体からなる炭化タングステン基
超硬合金製チップ材を拡散接合してなる、チップ材の接
合が強固な内燃機関タペット部材。
4. In% by weight, C: 0.13-0.5%, Si: 0.15-0.35%, Mn: 0.3-1.2%, Cr: 0.4-3. Ni: 0.4 to 4.5%, Mo: 0.15 to 0.7%, and one or two of the following, with the balance being Fe and unavoidable impurities. Co: 25 to 35%, P: 0.1 to 1%, chromium carbide: 0.5 to 10%, and Fe: on the top surface of the low-alloy steel tappet body having a composition consisting of: Tungsten carbide: 0.1% to 3%: A tappet member for an internal combustion engine having a strong bonding of a chip material, which is formed by diffusion bonding a chip material made of a tungsten carbide-based cemented carbide made of a sintered body having a composition of:
JP26224795A 1995-09-14 1995-09-14 Internal combustion engine tappet member with strong bonding of chip material Expired - Fee Related JP3248407B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26224795A JP3248407B2 (en) 1995-09-14 1995-09-14 Internal combustion engine tappet member with strong bonding of chip material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26224795A JP3248407B2 (en) 1995-09-14 1995-09-14 Internal combustion engine tappet member with strong bonding of chip material

Publications (2)

Publication Number Publication Date
JPH0978196A JPH0978196A (en) 1997-03-25
JP3248407B2 true JP3248407B2 (en) 2002-01-21

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CN102212759A (en) * 2011-05-26 2011-10-12 中国海洋石油总公司 Alloy steel for underwater pile gripper and preparation method thereof

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