JPH0436417A - Production of sliding member - Google Patents
Production of sliding memberInfo
- Publication number
- JPH0436417A JPH0436417A JP2142978A JP14297890A JPH0436417A JP H0436417 A JPH0436417 A JP H0436417A JP 2142978 A JP2142978 A JP 2142978A JP 14297890 A JP14297890 A JP 14297890A JP H0436417 A JPH0436417 A JP H0436417A
- Authority
- JP
- Japan
- Prior art keywords
- sliding member
- sliding
- mold
- quenching
- cast
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000005496 tempering Methods 0.000 claims abstract description 16
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 15
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 9
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical group OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 238000010791 quenching Methods 0.000 claims description 22
- 230000000171 quenching effect Effects 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 18
- 229910001566 austenite Inorganic materials 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 15
- 230000009466 transformation Effects 0.000 claims description 9
- 239000002344 surface layer Substances 0.000 claims description 8
- 238000004512 die casting Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 229910001349 ledeburite Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910017813 Cu—Cr Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は例えば内燃機関の動弁系部品であるカムシャフ
トのような摺動部材の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a sliding member such as a camshaft, which is a valve train component of an internal combustion engine.
（従来の技術）
従来、例えば車両用エンジンの動弁機構として用いられ
るカムシャフトのような摺動部材は、カム部がタペット
等との間ですべり接触を行なうため、耐摩耗性、靭性等
の特性を要求され、例えば金型によって鋳造された鋳鉄
製のカムシャフト表層部をチル化して形成している。こ
の際、第４図に示すように金型のキャビティ内に充填し
た溶湯の表層を急冷して殻状の凝固層とし、次いで離型
して放冷することにより、急冷した表層部を高硬度のチ
ル組織とする方法が知られている。そしてこのように形
成されたチル層の鉄鋼組織は、残留オーステナイト組織
とレーデライト組織の混合組織となっていた。(Prior Art) Conventionally, a sliding member such as a camshaft used as a valve mechanism of a vehicle engine has a cam part that makes sliding contact with a tappet, etc., so it has poor wear resistance, toughness, etc. Due to the required characteristics, the camshaft is formed by chilling the surface layer of a cast iron camshaft that is cast using a mold, for example. At this time, as shown in Fig. 4, the surface layer of the molten metal filled in the mold cavity is rapidly cooled to form a shell-like solidified layer, and then the mold is released and allowed to cool, so that the rapidly cooled surface layer becomes highly hard. A method of chilling the tissue is known. The steel structure of the chill layer thus formed was a mixed structure of a retained austenite structure and a lederite structure.
（発明が解決しようとするｉ！題）
しかし車両等のエンジンの現在の動向は、−層の高速回
転化、高出力化を図っており、このためにはカムシャフ
トのような摺動部材の摺動特性を一層向上させる必要が
ある。すなわち特にカム部とタペット等の接触のように
、潤滑油で潤滑されているにも拘わらず、軸受のような
良好な流体潤滑は期待出来ない摺動部分では、部材自体
の硬さ、自己潤滑性、表面処理等の特性を適正にしてピ
ッチング（軸の小穴傷）、スカッフィング（かじり傷）
、異常摩耗といった不具合を可能な限り抑制する必要が
ある。このため従来の金型鋳造で得られるチル層の残留
オーステナイトとレーデライトの混合組織を、靭性と耐
摩耗性に優れたレーデブライト組織とソルバイト組織の
混合！！織或いはレーデブライト組織と焼戻しマルテン
サイト組織の混合組織として耐ピツチング性、耐久カッ
フィング性を向上させることが望ましかった。(I! Problem that the invention seeks to solve) However, the current trend in engines for vehicles is to increase the rotation speed of the -layer and increase the output, and for this purpose, sliding members such as camshafts are required to It is necessary to further improve the sliding properties. In other words, especially in sliding parts such as the contact between the cam part and tappet, which are lubricated with lubricating oil but cannot be expected to have good fluid lubrication like bearings, the hardness of the member itself and the self-lubrication pitching (small hole scratches on the shaft) and scuffing (scuffing)
It is necessary to suppress problems such as , abnormal wear as much as possible. For this reason, the mixed structure of residual austenite and lederite in the chill layer obtained by conventional mold casting is a mixture of lederite structure and sorbite structure with excellent toughness and wear resistance! ! It is desirable to improve pitting resistance and durable cuffing properties by using a woven or mixed structure of a ledebrite structure and a tempered martensitic structure.
（課題を解決するための手段）
かかる課題を解決するため、本発明はＪＩＳＦＣ２０〜
ＦＣ３０相当の鋳鉄成分又はＮｉ ０．４〜０．６ｗｔ
％、Ｃｒ ０．５〜１．０ｗｔ％、Ｍｏ ０．５〜１．
０ｗｔ％の組成を有する合金鋳鉄からなる摺動部材を金
型で鋳造する鋳造工程と、離型後焼入れ処理する焼入れ
工程と、その後焼戻し処理する焼戻し工程を順次行ない
、摺動部の表層部分を金型鋳造により得られたレーデブ
ライト組織と、焼入れ焼戻しにより得られた焼戻しマル
テンサイト組織もしくは焼戻しソルバイト組織との混合
組織とし、しかも表面硬さをＨＲＣ５５以上とするよう
にした。(Means for solving the problem) In order to solve the problem, the present invention complies with JISFC20~
Cast iron component equivalent to FC30 or Ni 0.4-0.6wt
%, Cr 0.5-1.0wt%, Mo 0.5-1.
A casting process in which a sliding member made of alloyed cast iron having a composition of 0 wt% is cast in a mold, a quenching process in which it is quenched after being released from the mold, and a tempering process in which it is then tempered are sequentially performed to remove the surface layer of the sliding part. A mixed structure of a ledebrite structure obtained by die casting and a tempered martensite structure or a tempered sorbite structure obtained by quenching and tempering was created, and the surface hardness was set to HRC55 or higher.
又、前記焼入れ工程は、鋳造部材を離型後Ａ１変態点以
下６００℃以上の温度範囲の赤熱状態にあるうちに、高
周波誘導加熱によって加熱してチル層の残留オーステナ
イトをオーステナイト化し、或いは離型後Ａ１変態点以
下９００℃以上の温度範囲にあるうちに、高周波誘導加
熱によって加熱してチル層の残留オーステナイトをオー
ステナイト状態に保ち、爾後強制空冷によって冷却する
ようにした。In addition, in the quenching process, the cast member is heated by high-frequency induction heating to turn residual austenite in the chilled layer into austenite while it is in a red-hot state in a temperature range of 600° C. or below the A1 transformation point after being released from the mold, or the remaining austenite in the chilled layer is converted to austenite, or the cast member is released from the mold. The remaining austenite in the chilled layer was kept in an austenite state by heating by high-frequency induction heating while the temperature was in a temperature range of 900° C. or higher below the post-A1 transformation point, and then cooled by forced air cooling.
そしてかかる摺動部材とその摺動部として、内燃機関用
動弁機構のカムシャフトとそのカムを通用した。The camshaft and cam of a valve mechanism for an internal combustion engine were commonly used as such a sliding member and its sliding portion.
（作用）
摺動部をチル化によるレーデブライト組織と、焼入れ焼
戻しによる焼戻しマルテンサイト或いは焼戻しソルバイ
ト組織との混合組織にし特定の表面硬さとすることによ
って間部の靭性、疲労強度を向上させることが出来る。(Function) The toughness and fatigue strength of the sliding part can be improved by making the sliding part a mixed structure of a ledebrite structure obtained by chilling and a tempered martensite or tempered sorbite structure obtained by quenching and tempering to a specific surface hardness. .
又、カムシャフトの場合であれば耐スカッフィング性、
耐ピツチング性、耐摩耗性も向上して耐久性が増す。こ
の際焼入れ工程において、離型後の鋳造部材がＡ１変態
点以下６００℃以上の温度範囲にあるうちに高周波誘導
加熱によって加熱することによって、−旦常温まで下げ
て再び昇温させるよりも効率的な加熱が可能となり、焼
入れ時間が短縮化される。Also, in the case of camshafts, scuffing resistance,
Pitting resistance and abrasion resistance are also improved, increasing durability. At this time, in the quenching process, by heating the cast member after release from the mold by high-frequency induction heating while it is still within the temperature range of 600°C or higher below the A1 transformation point, it is more efficient than heating it up again after lowering it to room temperature. This allows for more precise heating and shortens the quenching time.
又、八、変態点以上９００℃以下の温度範囲にあるうち
に焼入れ加熱するようにすれば、昇温時に変態点通過に
よる体積変化がなく、焼入れ加熱に伴なう歪、変形、ク
ラック等の不具合が抑制される。In addition, 8. If the quenching heating is performed while the temperature is in the temperature range above the transformation point and below 900°C, there will be no volume change due to passing the transformation point when the temperature is raised, and distortion, deformation, cracks, etc. due to quenching heating will not occur. Defects are suppressed.
（実施例）
本発明の摺動部材の製造方法の実施例について添付した
図面に基つき説明する。(Example) An example of the method for manufacturing a sliding member of the present invention will be described based on the attached drawings.
第１図は本発明の摺動部材の１例であるカムシャフトの
一部断面図、第２図は製造方法を示す工程図である。FIG. 1 is a partial sectional view of a camshaft which is an example of the sliding member of the present invention, and FIG. 2 is a process diagram showing a manufacturing method.
周知のように、第１図に示すカムシャフト１にはシャフ
ト軸方向に複数のカム部２・・・が形成され、各カム部
２．２の間及びシャフト端部にはジャーナル部３が一体
的に設けられている。そしてこのカム部２には、エンジ
ンの吸排気バルブの弁揚程を行なわしめるためのカムリ
フタ部が設けられており、カム部にすへり接触するタペ
ット等から加わる接触圧は、特にこのカムリフタ部が高
くなる。As is well known, a camshaft 1 shown in FIG. 1 is formed with a plurality of cam parts 2 in the axial direction of the shaft, and a journal part 3 is integrally formed between each cam part 2.2 and at the end of the shaft. It is set up as follows. This cam portion 2 is provided with a cam lifter portion for raising the valve lift of the intake and exhaust valves of the engine, and the contact pressure applied from tappets etc. that come into contact with the cam portion is particularly high when the cam lifter portion is Become.
かかるカムシャフト１は金型鋳造によって得られ、本発
明の場合には、Ｎｉ ０．４〜０．６ ｗｔ％、Ｃｒ
０．５〜１．０ｗｔ％、Ｍｏ ０．５〜１．０ｗｔ％、
残Ｆｅの成分からなる合金鋳鉄の溶湯を金型に注入して
、表面を急冷させることによって表層部１ａにチル層を
形成する。このため鋳造に用いる金型は、例えば０．８
〜４．０ｗｔ％のＣｒを含有するＣｕ−Ｃｒ合金のよう
に熱伝導率の高いものによって構成し、表面部を急冷さ
せるため、金型内部の所定部に冷却路を形成する。そし
てかかる金型鋳造によって得られた鋳造品は、離型後放
冷されるが、本発明の一番目の方法では第２図に示すよ
うに鋳造品がＡ１変態点以下６００℃以上の赤熱状態に
あるうちに、鋳造品であるカムシャフト１のカム部２に
高周波加熱コイル４で９００℃〜１０５０℃に誘導加熱
し焼入れする。このためＡ□変態点以下となってチル層
に形成されたレーデブライト組織と残留オーステナイト
組織のうち残留オーステナイト組織のみがオーステナイ
ト化し、次いで強制急冷されることによって残留オース
テナイト組織のマルテンサイト化が行なわれる。この間
９００℃〜１０５０℃の保持時間を０とすることによっ
てレーデブライト組織の分解つまりセメンタイトの黒鉛
化はなされない。Such a camshaft 1 is obtained by die casting, and in the case of the present invention, Ni 0.4 to 0.6 wt%, Cr
0.5-1.0wt%, Mo 0.5-1.0wt%,
A molten cast iron alloy made of residual Fe is poured into a mold and the surface is rapidly cooled to form a chilled layer on the surface layer 1a. For this reason, the mold used for casting is, for example, 0.8
The mold is made of a material with high thermal conductivity such as a Cu-Cr alloy containing ~4.0 wt% Cr, and a cooling path is formed in a predetermined part inside the mold to rapidly cool the surface part. The cast product obtained by such die casting is left to cool after being released from the mold, but in the first method of the present invention, the cast product is in a red-hot state at a temperature below the A1 transformation point and above 600°C. While still in operation, the cam portion 2 of the camshaft 1, which is a cast product, is induction-heated to 900° C. to 1050° C. using a high-frequency heating coil 4 and hardened. Therefore, among the ledebrite structure and the retained austenite structure formed in the chill layer when the temperature becomes lower than the A□ transformation point, only the retained austenite structure becomes austenite, and then, by forced rapid cooling, the retained austenite structure is converted to martensite. During this period, by setting the holding time at 900° C. to 1050° C. to 0, decomposition of the ledebrite structure, that is, graphitization of cementite is not achieved.
従って焼入れ処理後のカム部２のチル層は、レーデブラ
イト組織とマルテンサイト組織との混合組織となる。Therefore, the chill layer of the cam portion 2 after the quenching process has a mixed structure of a ledebrite structure and a martensitic structure.
焼入れ後の焼戻し工程は、電気炉加熱により行なう。本
実施例では６００℃、 ＩＨの焼戻しく第２図実線）と
、 １８０℃、ＩＨの焼戻しく第２図破線）の例を示す
が、 ６００℃で焼き戻した時は、焼入れによるマルテ
ンサイト組織が焼戻しソルバイト組織に変化し、 １８
０℃で焼戻した時は焼入れによるマルテンサイト組織が
焼戻しマルテンサイト（βマルテンサイト）組織に変化
する。従って６００℃の焼戻しによるとカム部２のチル
層は金型鋳造により得られたレーデブライト組織と、焼
入れ焼戻しにより得られた焼戻しソルバイト組織との混
合組織となり、一方、 １８０℃の焼戻しによると、金
型鋳造により得られたレーデブライト組織と焼入れ焼戻
しにより得られた焼戻しマルテンサイト組織との混合組
織となることとなる。又いずれの場合もＨＲＣ５５以上
の表面硬さが確保できる。The tempering step after quenching is performed by heating in an electric furnace. In this example, examples of 600°C, IH tempering (solid line in Figure 2) and 180°C, IH tempering (Figure 2 (broken line)) are shown, but when tempering at 600°C, the martensite structure due to quenching. changes to a tempered sorbite structure, 18
When tempered at 0°C, the martensite structure due to quenching changes to a tempered martensite (β-martensite) structure. Therefore, when tempered at 600°C, the chill layer of the cam part 2 becomes a mixed structure of the ledebrite structure obtained by die casting and the tempered sorbite structure obtained by quenching and tempering, whereas when tempered at 180°C, This results in a mixed structure of the ledebrite structure obtained by die casting and the tempered martensitic structure obtained by quenching and tempering. In either case, a surface hardness of HRC55 or higher can be ensured.
次に第３図は本発明の２番目の方法を示し、訪導加熱開
始時期をＡ１変態点以上９００℃以下のオーステナイト
領域の温度範囲から始めるようにしたものである。この
場合は加熱開始時のチル層には残留オーステナイト以外
にレーデブライト組織が形成されているが、残留オース
テナイトはそのままオーステナイト状態を保つこととな
る。又この場合も焼入れ温度は９００℃〜１０５０℃と
し、保持時間Ｏで強制空冷を行なう。Next, FIG. 3 shows the second method of the present invention, in which the heating start time is started from the temperature range of the austenite region above the A1 transformation point and below 900°C. In this case, a ledebrite structure is formed in addition to the retained austenite in the chill layer at the start of heating, but the retained austenite remains in an austenite state. Also in this case, the quenching temperature is 900°C to 1050°C, and forced air cooling is performed for a holding time of O.
こうして得られた焼入れ処理後のカム部２には、前記と
同様レーデブライト組織とマルテンサイト組織の混合組
織からなるチル層が形成されており、前述と同様の焼戻
し工程が行なわれる。In the cam portion 2 thus obtained after the hardening process, a chill layer consisting of a mixed structure of a ledebrite structure and a martensitic structure is formed as described above, and the same tempering process as described above is performed.
つまり電気炉か加熱によって６００℃、ＩＨ（実線）又
は１８０℃ ＩＨ（破線）を行なうことによって、ＨＲ
Ｃ５５以上のレーデブライト組織と焼戻しソルバイト組
織の混合組織、或いは、レーデブライト組織と焼戻しマ
ルテンサイト組織との混合組織とすることが出来る。そ
してこのように形成した混合組織は、衝撃等に対する粘
り強さに優れ、疲れ破壊を起しにくく強靭である。尚、
焼入れ焼戻し処理は、カム部２のカムリフタ部の必要部
分のみに施すようにしてもよい。In other words, by heating in an electric furnace at 600°C, IH (solid line) or at 180°C, IH (broken line), the HR
It can be a mixed structure of a C55 or higher ledebrite structure and a tempered sorbite structure, or a mixed structure of a ledebrite structure and a tempered martensite structure. The mixed structure thus formed has excellent tenacity against impact and the like, and is tough and resistant to fatigue failure. still,
The quenching and tempering treatment may be applied only to necessary portions of the cam lifter portion of the cam portion 2.
（発明の効果）
以上のように本発明の摺動部材の製造方法は、摺動部の
摺動特性を向上させるため、摺動部の表層をレーデブラ
イト組織と焼戻しマルテンサイト組織の混合組織或いは
レーデブライト組織と焼戻しソルバイト組織の混合組織
とし、しかも鋳造品を金型から離型後、常温まで冷却さ
せることなく引き続いて焼入れ加熱を行なうようにした
ため、焼入れ処理がより迅速となりサイクルタイムが短
縮される。又加熱昇温に伴なう歪、変形、クラック等の
抑制が可能である。(Effects of the Invention) As described above, the method for manufacturing a sliding member of the present invention improves the sliding characteristics of the sliding part by forming the surface layer of the sliding part into a mixed structure of a ledebrite structure and a tempered martensite structure or a ledebrite structure. The structure is a mixture of the structure and the tempered sorbite structure, and after the cast product is released from the mold, it is heated for quenching without being cooled to room temperature, so the quenching process becomes faster and the cycle time is shortened. It is also possible to suppress distortion, deformation, cracks, etc. caused by heating and temperature rise.
又かかる方法で形成される摺動部材をカムシャフトに適
用することによって、エンジンの高回転、高出力といフ
た要請に沿うことが出来る。Furthermore, by applying a sliding member formed by such a method to a camshaft, it is possible to meet the requirements of high rotation and high output of the engine.
第１図は本発明の摺動部材の１例であるカムシャフトの
一部断面図、第２図、第３図は製造方法を示す工程図、
第４図は従来の製造方法の工程図である。
尚同図中、１はカムシャフト、１ａは表層部、２はカム
部、４は高周波加熱コイルを示す。FIG. 1 is a partial sectional view of a camshaft which is an example of the sliding member of the present invention, FIGS. 2 and 3 are process diagrams showing the manufacturing method,
FIG. 4 is a process diagram of a conventional manufacturing method. In the figure, 1 is a camshaft, 1a is a surface layer portion, 2 is a cam portion, and 4 is a high-frequency heating coil.
Claims (3)
Ｎｉ０．４〜０．６ｗｔ％、Ｃｒ０．５〜１．０ｗｔ％
、Ｍｏ０．５〜１．０ｗｔ％の組成を有する合金鋳鉄か
らなる摺動部材を金型で鋳造する鋳造工程と、離型後焼
入れ処理する焼入れ工程と、その後焼戻し処理する焼戻
し工程を順次行ない、摺動部の表層部分を金型鋳造によ
り得られたレーデブライト組織と、焼入れ焼戻しにより
得られた焼戻しマルテンサイト組織もしくは焼戻しソル
バイト組織の混合組織とし、しかも表面硬さをＨＲＣ５
５以上とするようにしたことを特徴とする摺動部材の製
造方法。(1) Cast iron components equivalent to JIS FC20-FC30 or Ni0.4-0.6wt%, Cr0.5-1.0wt%
, a casting process in which a sliding member made of alloyed cast iron having a composition of 0.5 to 1.0 wt% Mo is cast in a mold, a quenching process in which a quenching process is performed after release from the mold, and a tempering process in which a tempering process is performed thereafter. The surface layer of the sliding part has a mixed structure of a ledebrite structure obtained by die casting and a tempered martensite structure or a tempered sorbite structure obtained by quenching and tempering, and has a surface hardness of HRC5.
A method of manufacturing a sliding member, characterized in that the number of sliding members is 5 or more.
点以下６００℃以上の温度範囲の赤熱状態にあるうちに
、高周波誘導加熱によって加熱してチル層に、高周波誘
導加熱によって加熱してチル層の残留オーステナイトを
オーステナイト状態に保ち、爾後強制空冷によって冷却
することを特徴とする請求項第１に記載の摺動部材の製
造方法。(2) The above-mentioned quenching step is performed by heating the cast member by high-frequency induction heating to form a chill layer while the cast member is in a red-hot state in a temperature range of 600°C or higher below the A_1 transformation point after being released from the mold. 2. The method of manufacturing a sliding member according to claim 1, wherein residual austenite in the chill layer is maintained in an austenitic state and then cooled by forced air cooling.
トであり、又前記摺動部はカムであることを特徴とする
請求項第２に記載の摺動部材の製造方法。(3) The method of manufacturing a sliding member according to claim 2, wherein the sliding member is a camshaft of a valve mechanism for an internal combustion engine, and the sliding portion is a cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2142978A JP2886266B2 (en) | 1990-05-31 | 1990-05-31 | Method for manufacturing camshaft of valve train for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2142978A JP2886266B2 (en) | 1990-05-31 | 1990-05-31 | Method for manufacturing camshaft of valve train for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0436417A true JPH0436417A (en) | 1992-02-06 |
| JP2886266B2 JP2886266B2 (en) | 1999-04-26 |
Family
ID=15328084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2142978A Expired - Fee Related JP2886266B2 (en) | 1990-05-31 | 1990-05-31 | Method for manufacturing camshaft of valve train for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2886266B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997013396A2 (en) * | 1995-10-11 | 1997-04-17 | Mahle Gmbh | Reinforcing component of which the basic material is austenitic cast iron |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184424A (en) * | 2019-06-06 | 2019-08-30 | 宁波甬微集团有限公司 | A kind of processing method of rotor-type compressor slide plate |
-
1990
- 1990-05-31 JP JP2142978A patent/JP2886266B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997013396A2 (en) * | 1995-10-11 | 1997-04-17 | Mahle Gmbh | Reinforcing component of which the basic material is austenitic cast iron |
| WO1997013396A3 (en) * | 1995-10-11 | 1997-06-05 | Mahle Gmbh | Reinforcing component of which the basic material is austenitic cast iron |
| US6063509A (en) * | 1995-10-11 | 2000-05-16 | Mahle Gmbh | Reinforcing component of which the basic material is austenitic cast iron |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2886266B2 (en) | 1999-04-26 |
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