JPH10103150A - Double layer cylinder liner - Google Patents

Double layer cylinder liner

Info

Publication number
JPH10103150A
JPH10103150A JP28010796A JP28010796A JPH10103150A JP H10103150 A JPH10103150 A JP H10103150A JP 28010796 A JP28010796 A JP 28010796A JP 28010796 A JP28010796 A JP 28010796A JP H10103150 A JPH10103150 A JP H10103150A
Authority
JP
Japan
Prior art keywords
layer material
cylinder liner
liner
cast iron
outer layer
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
Application number
JP28010796A
Other languages
Japanese (ja)
Other versions
JP3595420B2 (en
Inventor
Hiroshi Notomi
啓 納富
Yoshimi Kamito
好美 上戸
Akihiko Matsui
昭彦 松井
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP28010796A priority Critical patent/JP3595420B2/en
Publication of JPH10103150A publication Critical patent/JPH10103150A/en
Application granted granted Critical
Publication of JP3595420B2 publication Critical patent/JP3595420B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Landscapes

  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder liner suited for a large sized Diesel engine, in the cylinder liner having high seizure resistance and high wear resistance in a slide surface also having strength markedly exceeding that of the conventional cast iron-made liner in a base material and reducing a cost of manufacture. SOLUTION: In a double cylinder liner 1 formed by fixing a cylindrical inner layer material 21 formed with a slide surface 22a of a piston in the internal periphery in the inside of a cylindrical outer layer material, the outer layer material 21 is constituted by a steel material capable of welding of carbon steel, low alloy copper, etc., in the inner layer material 22, a cast iron system material of high C(carbon) - high Si(silicon) - high Fe(iron) system is granule plasma padding welded to the outer layer material 21. Or a graphitizing process is applied to the liner 1 with the inner layer material 22 padding welded.

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】本発明は内燃機関等の往復動
機関に使用されるシリンダライナのうち、材質の異なる
筒状の外層材と筒状の内層材とを組合わせてなる二層シ
リンダライナ及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer cylinder liner comprising a combination of a cylindrical outer layer material and a cylindrical inner layer material of cylinder liners used for a reciprocating engine such as an internal combustion engine. And its manufacturing method.

【０００２】[0002]

【発明が解決しようとする課題】図８は、大型ディーゼ
ル機関用シリンダライナの従来の一例を示す外観図で有
る。かかるシリンダライナ１は、内面１ａがピストンリ
ング（図示せず）と摺接し、外面１ｂが冷却水と接して
おり、従来、一般に普通鋳鉄、ダクタイル鋳鉄（球状黒
鉛鋳鉄）等の一体鋳造にて製作されていた。FIG. 8 is an external view showing an example of a conventional cylinder liner for a large diesel engine. Such a cylinder liner 1 has an inner surface 1a that is in sliding contact with a piston ring (not shown) and an outer surface 1b that is in contact with cooling water. Conventionally, the cylinder liner 1 is generally manufactured by integral casting of ordinary cast iron, ductile cast iron (spheroidal graphite cast iron), or the like. It had been.

【０００３】かかる鋳鉄製一体型シリンダライナの材質
の一例として、Ｃ（炭素）＝４〜５％、Ｓｉ（珪素）＝
３〜５％、Ｍｎ（マンガン）＝１〜２％、Ｐ（リン）＝
１％、Ｆｅ（鉄）＝残部から成る高リン系鋳鉄ライナが
ある。また、この一体型シリンダライナは、鋳放し後、
５００〜６００℃の残留応力除去の熱処理（ＳＲ処理）
を施している。As an example of the material of such an integrated cylinder liner made of cast iron, C (carbon) = 4 to 5%, Si (silicon) =
3-5%, Mn (manganese) = 1-2%, P (phosphorus) =
There is a high phosphorus cast iron liner with 1% Fe (iron) = balance. Also, this integrated cylinder liner, after as-cast,
Heat treatment for removing residual stress at 500 to 600 ° C (SR treatment)
Has been given.

【０００４】しかしながら、前記従来の一体型鋳鉄シリ
ンダライナにあっては、次のような問題点を抱えてい
る。[0004] However, the conventional integrated cast iron cylinder liner has the following problems.

【０００５】（１）かかる一体型鋳鉄ライナにあって
は、大型（シリンダ内径１０００ｍｍクラス）で厚肉
（ライナ壁厚さ１５０〜２００ｍｍ程度）のライナの場
合、鋳造後の冷却速度が不均一となるため、鋳物組織が
不均一となり、強度低下部分が発生することが多々であ
る。このため、高強度を必要とする大出力エンジンに使
用するには、満足な強度が得られ難い。(1) In the case of such an integrated cast iron liner, if the liner is large (the cylinder inner diameter is 1000 mm class) and thick (the liner wall thickness is about 150 to 200 mm), the cooling rate after casting is not uniform. Therefore, the cast structure becomes non-uniform, and a portion where the strength is reduced often occurs. Therefore, it is difficult to obtain a satisfactory strength for use in a high-power engine requiring high strength.

【０００６】（２）また、該シリンダライナは、内面を
ピストンリングが摺動するため、高い耐摩耗性と耐焼付
性を必要とするが、従来の一体型鋳鉄ライナでは、鋳造
性及び鋳造の品質の制約から、かかる性質を充分に備え
たものを製作するのは困難な面があった。(2) The cylinder liner requires high wear resistance and seizure resistance because the piston ring slides on the inner surface. However, in the case of the conventional integrated cast iron liner, castability and castability are poor. Due to quality constraints, it has been difficult to produce a product with sufficient properties.

【０００７】さらには、前記一体型鋳鉄ライナは、鋳造
性の面からＣ（炭素）＝３〜４％の含有が限界であり、
特に構成成分を変化させたり、熱処理によって硬さや片
状黒鉛組織を調整することは困難で、高強度が要求され
る大型高出力エンジンに対応できる材料強度の確保に困
難な面がある。Further, the above-mentioned integrated cast iron liner has a limit of C (carbon) content of 3 to 4% from the viewpoint of castability.
In particular, it is difficult to change the constituents or to adjust the hardness or flaky graphite structure by heat treatment, and it is difficult to secure the material strength that can be used for a large high-power engine requiring high strength.

【０００８】本発明は前記従来技術の課題に鑑みて、摺
動面が高い耐焼付性、耐摩耗性を有するとともに、母材
が従来の鋳鉄製ライナを大幅に上廻る強度を有し、かつ
製造コストが低減されたシリンダライナであって、大型
ディーゼル機関用として好適なシリンダライナを提供す
ることを目的とする。In view of the above-mentioned problems of the prior art, the present invention has a sliding surface having high seizure resistance and abrasion resistance, and a base material having strength far exceeding that of a conventional cast iron liner, and It is an object of the present invention to provide a cylinder liner with reduced manufacturing cost, which is suitable for a large diesel engine.

【０００９】[0009]

【課題を解決するための手段】本発明はかかる技術的課
題を解決するために、筒状の外層材の内側に、内周にピ
ストンの摺動面が形成される筒状の内層材を固定してな
る二層シリンダライナであって、前記外層材は、炭素
銅、低合金銅等の溶接可能な鋼材にて構成され、前記内
層材は、高Ｃ（炭素）−高Ｓｉ（珪素）−高Ｆｅ（鉄）
系の鋳鉄系材料を前記外層材に粉体プラズマ肉盛溶接し
て構成されたことを特徴とする二層シリンダライナを提
案する。According to the present invention, in order to solve the above technical problem, a cylindrical inner layer material having a piston sliding surface formed on an inner periphery is fixed inside a cylindrical outer layer material. Wherein the outer layer material is made of a weldable steel material such as carbon copper or low alloy copper, and the inner layer material is high C (carbon) -high Si (silicon)-. High Fe (iron)
The present invention proposes a two-layer cylinder liner characterized by being formed by welding a cast iron-based material to the outer layer material by powder plasma overlay welding.

【００１０】また、前記二層シリンダライナにおいて、
好ましくは、前記内層材の鋳鉄系材料を、少なくともＣ
（炭素）＝４．５〜５．５％、Ｓｉ（珪素）＝２〜３
％、Ｍｎ（マンガン）≒１．０％、銅（Ｃｕ）≦１．０
％、Ｐ（リン）≦１．０％、Ｃｒ（クロム）＜１．０
％、Ｆｅ（鉄）＝残部にて構成する。[0010] In the two-layer cylinder liner,
Preferably, the cast iron-based material of the inner layer material is at least C
(Carbon) = 4.5-5.5%, Si (silicon) = 2-3
%, Mn (manganese) ≒ 1.0%, copper (Cu) ≦ 1.0
%, P (phosphorus) ≦ 1.0%, Cr (chromium) <1.0
%, Fe (iron) = balance.

【００１１】また、本発明は、前記のように構成された
二層シリンダライナの製造方法として、炭素銅、低合金
銅等の溶接可能な銅材により、筒状の外層材を成形し、
該外層材の内周に、高Ｃ（炭素）−高Ｓｉ（珪素）−高
Ｆｅ（鉄）系の鋳鉄系材料の粉末をプラズマ肉盛溶接に
より肉盛りして、内層材を形成することを特徴とする製
造方法を提案する。The present invention also provides a method for manufacturing a two-layer cylinder liner having the above-described structure, comprising forming a cylindrical outer layer material from a weldable copper material such as carbon copper or low alloy copper.
Powder of a high C (carbon) -high Si (silicon) -high Fe (iron) cast iron material is built up on the inner periphery of the outer layer material by plasma overlay welding to form the inner layer material. A characteristic manufacturing method is proposed.

【００１２】かかる発明によれば、摺動性能の良好な鋳
鉄系材料の粉体プラズマ肉盛溶接により内層材を形成し
たので、高い耐焼付性を有する内層材が得られるととも
に、該内層材の厚さを摩耗代程度の薄肉として高強度の
鋼材からなる外層材を強度部材としたことにより、従来
の鋳鉄製シリンダライナに較べ、均一な組成で、かつこ
れの２倍以上の高強度を有するシリンダライナが得られ
る。According to this invention, since the inner layer material is formed by powder plasma overlay welding of a cast iron-based material having good sliding performance, an inner layer material having high seizure resistance is obtained, and the inner layer material is formed. The outer layer made of high-strength steel is used as a strength member with a thickness as thin as abrasion allowance, so it has a uniform composition and more than twice as high strength as conventional cast iron cylinder liners. A cylinder liner is obtained.

【００１３】従って、シリンダライナの厚さを従来の鋳
鉄製ライナの約１／２と薄肉化することができ、ライナ
の軽量コンパクト化及び低コスト化が実現でき、熱応力
の低下も得られ、さらなる耐久性の向上が得られる。Accordingly, the thickness of the cylinder liner can be reduced to about half that of the conventional cast iron liner, the weight and size of the liner can be reduced, the cost can be reduced, and the thermal stress can be reduced. Further improvement in durability can be obtained.

【００１４】尚、前記発明（第１発明）において、前記
外層材及び内層材からなる二層ライナの下方に、内周に
摺動面を有する鋳鉄材からなる下部ライナをボルト等に
より固着してなる二層式シリンダライナとすることもで
きる。In the above invention (first invention), a lower liner made of a cast iron material having a sliding surface on the inner periphery is fixed to the lower part of the two-layer liner made of the outer layer material and the inner layer material by bolts or the like. A two-layer cylinder liner can be formed as follows.

【００１５】かかる手段によれば、高強度、高い摩耗性
及び耐焼付性を必要としないライナ下部を安価な鋳鉄材
とすることができるので、さらに低コストのシリンダラ
イナが得られる。According to such a means, the lower portion of the liner, which does not require high strength, high wear resistance and seizure resistance, can be made of inexpensive cast iron material, so that a cylinder liner with lower cost can be obtained.

【００１６】さらに本発明の第２発明として、前記プラ
ズマ肉盛溶接施工後のシリンダライナを熱処理炉内にお
いて、９００〜９５０℃にて｛ライナ肉厚（ｍｍ）／２
５（ｍｍ）｝時間保持後、炉冷却する黒鉛化処理を施
し、次いで、該シリンダライナについて、５００〜６０
０℃にて｛ライナ肉厚（ｍｍ）／２５（ｍｍ）｝時間保
持後、炉冷却する残留応力除去処理を施すようにした二
層シリンダライナの製造方法を提案する。Further, as a second invention of the present invention, the cylinder liner after the above-mentioned plasma overlay welding is placed in a heat treatment furnace at 900 to 950 ° C. at a liner wall thickness (mm) / 2.
After holding for 5 (mm) hours, a graphitization treatment for cooling the furnace is performed.
The present invention proposes a method for manufacturing a two-layer cylinder liner in which a residual stress removing treatment is performed in which the liner thickness (mm) / 25 (mm) is maintained at 0 ° C. for an hour and then cooled in a furnace.

【００１７】かかる発明によれば、外層材の内面に粉体
プラズマ肉盛溶接により、内層材を形成したシリンダラ
イナを、熱処理炉内で上記条件により、黒鉛化処理する
ことにより、片状黒鉛組織を２０％以上に増大せしめた
内層材とすることができ、これによりピストンリングと
の摺動面の摺動性能が著しく向上し、耐摩耗性、耐焼付
性が著しく改善される。According to this invention, the cylinder liner having the inner layer material formed on the inner surface of the outer layer material by powder plasma overlay welding is graphitized in a heat treatment furnace under the above conditions, thereby obtaining a flaky graphite structure. Is increased to 20% or more, whereby the sliding performance of the sliding surface with the piston ring is significantly improved, and the wear resistance and seizure resistance are significantly improved.

【００１８】また、かかる製法によれば、要求される耐
摩耗性や耐焼付性に合わせて、片状黒鉛量を調整するこ
とができる。Further, according to this production method, the amount of flaky graphite can be adjusted in accordance with required abrasion resistance and seizure resistance.

【００１９】[0019]

【発明の実施の形態】以下、図面を参照して本発明の好
適な実施例を例示的に詳しく説明する。但し、この実施
例に記載されている構成部品の寸法、材質、形状、その
相対的配置等は特に特定的な記載がないかぎりは、この
発明の範囲をそれに限定する趣旨ではなく、単なる説明
例にすぎない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. It's just

【００２０】図１は本発明の第１実施形態に係るシリン
ダライナの要部断面図、図２は変形例を示す要部断面
図、図３（表）は上記第１実施形態にかかるシリンダラ
イナの成分構成及び機械的性質を従来のシリンダライナ
と比較した表である。図１において、１はシリンダライ
ナであり、筒状の外層材２１の内側に筒状の内層材２２
が固着された構造となっている。２２ａはピストンリン
グ（図示せず）と摺接する摺動面（内面）、２５はシリ
ンダライナ中心線である。FIG. 1 is a sectional view of a principal part of a cylinder liner according to a first embodiment of the present invention, FIG. 2 is a sectional view of a principal part showing a modification, and FIG. 3 (table) is a cylinder liner according to the first embodiment. 3 is a table comparing the component composition and mechanical properties of the conventional cylinder liner. In FIG. 1, reference numeral 1 denotes a cylinder liner, and a cylindrical inner layer material 22 is provided inside a cylindrical outer layer material 21.
Are fixed. Reference numeral 22a denotes a sliding surface (inner surface) that comes into sliding contact with a piston ring (not shown), and reference numeral 25 denotes a cylinder liner center line.

【００２１】前記外層材２１は炭素銅、低合金銅等の溶
接可能で炭素銅と同等あるいはそれ以上の強度（引張強
さ、耐力、伸び等）を有する鋼材からなり、機械加工に
より所定の形状に成形される。The outer layer material 21 is made of a steel material such as carbon copper or low alloy copper which can be welded and has a strength (tensile strength, proof stress, elongation, etc.) equal to or higher than that of carbon copper. Molded into

【００２２】また、前記内層材２２は、高Ｃ（炭素）−
高Ｓｉ（珪素）−高Ｆｅ（鉄）系の鋳鉄系肉盛金属の粉
末体を、前記外層材２１の内面に、低希釈溶接法である
粉体プラズマ肉盛溶接により、円周方向に多パス連続溶
接するか、あるいは長手方向（軸方向）に筋盛り多パス
溶接して固着する。The inner layer material 22 is made of high C (carbon)-
A powder of a high Si (silicon) -high Fe (iron) cast iron-based overlay metal is circumferentially coated on the inner surface of the outer layer material 21 by powder plasma overlay welding, which is a low dilution welding method. It is fixed by continuous pass welding or multi-pass welding in the longitudinal direction (axial direction).

【００２３】前記内層材２２の肉盛溶接後、機械加工
（研削、ホーニング等）により、内面即ち摺動面２２ａ
を所定の寸法に仕上げる。かかる最後仕上後の内層材２
２の厚さｔが、シリンダライナ１の最大摩耗量程度か、
それを若干上廻る程度の薄肉とし、大型ディーゼル機関
用シリンダライナの場合、３〜５ｍｍ程度が好適であ
る。After the build-up welding of the inner layer material 22, the inner surface, that is, the sliding surface 22a is machined (grinding, honing, etc.).
Is finished to predetermined dimensions. Inner layer material 2 after such final finishing
2 is about the maximum wear of the cylinder liner 1,
In the case of a cylinder liner for a large diesel engine, the thickness is preferably about 3 to 5 mm.

【００２４】図３は前記内層材２２の構成成分及び機械
的性質を示す。図３に示されるように、かかる内層材２
２に使用する鋳鉄系粉末材料の構成成分は、Ｃ（炭素）
＝４．５〜５．５％、Ｓｉ（珪素）＝２〜３％、Ｍｎ
（マンガン）≒１．０％、銅（Ｃｕ）≦１．０％、Ｐ
（リン）≦１．０％、Ｃｒ（クロム）＜１．０％、Ｆｅ
（鉄）＝残部が好適である。FIG. 3 shows the constituent components and mechanical properties of the inner layer material 22. As shown in FIG.
The component of the cast iron-based powder material used in No. 2 is C (carbon)
= 4.5-5.5%, Si (silicon) = 2-3%, Mn
(Manganese) ≒ 1.0%, copper (Cu) ≦ 1.0%, P
(Phosphorus) ≦ 1.0%, Cr (chromium) <1.0%, Fe
(Iron) = the balance is preferred.

【００２５】図２は本発明に係る二層シリンダライナの
変形例を示す。この例では、ライナを上下に２分割し、
高い耐摩耗性、耐焼付性が要求される。上部ライナ１Ａ
に、図１のものと同様前記外層材２１とその内面に粉体
プラズマ肉盛溶接された内層材２２とよりなる２層ライ
ナとし、摺動性能のみを要求される下部には鋳鉄下部ラ
イナ２３を採用し、両者を円周方向等間隔に配置された
複数本のボルト２６により固定している。尚、かかるラ
イナの摺動面２２ａ、２３ａは上、下部ライナ１Ａ、２
３をボルト２６にて固定した後、同時加工にて仕上げ
る。FIG. 2 shows a modification of the two-layer cylinder liner according to the present invention. In this example, the liner is split up and down
High abrasion resistance and seizure resistance are required. Upper liner 1A
1, a two-layer liner comprising the outer layer material 21 and the inner layer material 22 welded to the inner surface thereof by powder plasma build-up welding, and a cast iron lower liner 23 is provided at the lower part where only sliding performance is required. Are fixed by a plurality of bolts 26 arranged at equal intervals in the circumferential direction. The sliding surfaces 22a and 23a of the liner are upper and lower liners 1A and 2A.
3 is fixed by bolts 26 and finished by simultaneous processing.

【００２６】以上のようにして製造された二層シリンダ
ライナは、外層材２１として高強度の鋼材を使用し、こ
れの内面に内層材２２として鋳鉄系の粉末材料をプラズ
マ肉盛溶接したので、肉盛溶接によって徐々に内層の摺
動部（内層材２２）所定厚さｔまで形成して行く溶接方
法によるので、溶接歪及び残留応力が少なくなるととも
に、ライナの寿命が用途に応じて耐摩耗性の異なる材料
を使用して肉盛溶接したライナを得ることができる。In the two-layer cylinder liner manufactured as described above, a high-strength steel material is used as the outer layer material 21 and a cast iron-based powder material is plasma-welded as the inner layer material 22 to the inner surface thereof. Since the inner sliding portion (inner layer material 22) is gradually formed to a predetermined thickness t by overlay welding, welding distortion and residual stress are reduced, and the life of the liner is reduced depending on the application. It is possible to obtain a liner welded by overlay using materials having different properties.

【００２７】そして、かかる二層シリンダライナは、上
記摺動特性に加えて、摺動面２２ａを構成する内層材２
２を最大摩耗代がそれを若干上廻る程度の薄肉とし、高
強度の外層材２１を強度部材としたので、引張強さのσ
Ｂ＝６０Ｋｇ／ｍｍ2 と、従来の鋳鉄ライナの２倍以上
の高強度を有することとなる。従って、シリンダライナ
の厚さを従来のものの１／２とすることができ、ライナ
の軽量コンパクト化、低コスト化及び熱応力の低減が可
能となる。The two-layer cylinder liner has an inner layer material 2 forming the sliding surface 22a in addition to the above sliding characteristics.
2 is thin enough to allow the maximum wear margin to slightly exceed it, and the high-strength outer layer material 21 is used as a strength member.
B = 60 Kg / mm 2, which is twice as high as that of a conventional cast iron liner. Therefore, the thickness of the cylinder liner can be reduced to half of that of the conventional cylinder liner, and the liner can be reduced in weight and size, cost can be reduced, and thermal stress can be reduced.

【００２８】また、内層材２２の肉盛溶接は、低希釈溶
接法の採用による１層肉盛溶接が可能であるため、所定
厚さつまり、前記のような最大摩耗量に対応する厚さ、
あるいはそれを若干上廻る厚さｔの厚肉の肉盛が可能と
なり、しかも肉盛溶接工数が少なくて済む。In addition, since the overlay welding of the inner layer material 22 can be performed by one-layer overlay welding by adopting a low dilution welding method, a predetermined thickness, that is, a thickness corresponding to the maximum wear amount as described above,
Alternatively, it is possible to form a thick overlay having a thickness t slightly larger than that, and to reduce the number of overlay welding steps.

【００２９】図４は、本発明の実施形態に係る二層シリ
ンダライナの試験品Ａ、Ｂ、Ｃと従来の単層鋳鉄ライナ
の耐摩耗性の比較実験結果を示す。図４に明らかなよう
に、本発明に係る試験品Ａ、Ｂ、Ｃのうち、改良された
試験品Ｂ、Ｃは、従来のライナＤに較べ、高い耐摩耗性
を有する。FIG. 4 shows the results of a comparative experiment on the wear resistance of the test articles A, B, and C of the two-layer cylinder liner according to the embodiment of the present invention and the conventional single-layer cast iron liner. As apparent from FIG. 4, among the test articles A, B, and C according to the present invention, the improved test articles B and C have higher wear resistance than the conventional liner D.

【００３０】図５は、上記試験品Ａ、Ｂ、Ｃと従来のも
のＤとの耐焼付性（焼付面圧）の実験結果を示す。図に
おいてＺが実用可能な焼付面圧線（４００Ｋｇ／ｃ
ｍ2）であるが、各試験品Ａ、Ｂ、Ｃは、１，１００〜
１，２００Ｋｇ／ｃｍ2 と、従来のものＤを上廻る高い
焼付面圧即ち、耐焼付性を備えている。FIG. 5 shows the results of an experiment on the seizure resistance (seizure surface pressure) of the test articles A, B and C and the conventional article D. In the figure, Z is a practical surface pressure line (400 kg / c
m 2 ), but each of the test products A, B, and C is 1,100 to
It has a high surface pressure of 1,200 Kg / cm 2, which is higher than that of the conventional product D, that is, has a seizure resistance.

【００３１】図６は、本発明の第２実施形態に係る二層
シリンダライナの要部断面図を示す。この実施形態に係
るシリンダライナ１においては、外層材３１は前記第１
実施形態と同じく、炭素銅、低合金銅等の溶接可能な鋼
材からなる。FIG. 6 is a sectional view showing a main part of a two-layer cylinder liner according to a second embodiment of the present invention. In the cylinder liner 1 according to this embodiment, the outer layer material 31 is the first layer material.
As in the embodiment, it is made of a weldable steel material such as carbon copper and low alloy copper.

【００３２】また、前記外層材３１の内面には、Ｃ（炭
素）＝４．５〜５．０％、Ｓｉ（珪素）＝３％、Ｍｎ
（マンガン）＝１．０％、銅（Ｃｕ）＝１．０％、Ｆｅ
（鉄）＝残部の成分構成からなる高Ｃ−高Ｓｉ−高Ｆｅ
系の鋳鉄材料を、粉末にし、円周方向に粉体プラズマ肉
盛溶接を施して固着する。On the inner surface of the outer layer material 31, C (carbon) = 4.5-5.0%, Si (silicon) = 3%, Mn
(Manganese) = 1.0%, copper (Cu) = 1.0%, Fe
(Iron) = high C-high Si-high Fe composed of the balance of components
The cast iron material of the system is made into powder and fixed by applying powder plasma overlay welding in the circumferential direction.

【００３３】そして、図７に示されるように、前記のよ
うにして、外層材３１の内面、内層材３２が溶接された
シリンダライナ１を熱処理炉４１内に収納し、９００〜
９５０℃で、｛ライナ肉厚（ｍｍ）／２５（ｍｍ）｝時
間、大型シリンダライナの場合は、４〜５時間保持後、
炉冷却することにより、黒鉛化処理を行う。これによ
り、オーステナイト残存組織の分解をなしてバーライト
化するとともに、片状黒鉛組織を２０％以上に増大せし
めて、耐摩耗性、耐焼付性を向上させる。尚、図７にお
いて、４２は加熱源である。Then, as shown in FIG. 7, the cylinder liner 1 to which the inner surface of the outer layer material 31 and the inner layer material 32 are welded as described above is stored in the heat treatment furnace 41,
At 950 ° C, {liner thickness (mm) / 25 (mm)} hours, and in the case of a large cylinder liner, after holding for 4-5 hours,
Graphitization is performed by cooling the furnace. As a result, the austenite residual structure is decomposed into barite, and the flaky graphite structure is increased to 20% or more, thereby improving wear resistance and seizure resistance. In FIG. 7, reference numeral 42 denotes a heating source.

【００３４】次いで、溶接部の残留応力除去のため、６
００〜６５０℃で｛ライナ肉厚（ｍｍ）／２５（ｍ
ｍ）｝時間、大型シリンダライナの場合は、４〜５時間
保持後、炉冷却するＳＲ処理を行う。その後、摺動面に
機械加工を施して仕上げる。これにより、要求される耐
摩耗性や耐焼付性に合わせて片状黒鉛量を調整すること
ができる。Next, in order to remove the residual stress of the weld, 6
At 00 to 650 ° C, the liner thickness (mm) / 25 (m
m) In the case of a large cylinder liner for｝ hours, after holding for 4 to 5 hours, perform SR processing for furnace cooling. Then, the sliding surface is machined and finished. This makes it possible to adjust the amount of flake graphite in accordance with the required wear resistance and seizure resistance.

【００３５】かかる黒鉛化処理によって、ピストンリン
グとの摺動面３２ａが形成される内層材３２は、その片
状黒鉛組織が２０％以上に増大せしめられ、該摺動面３
２ａにおけるピストンリングとの摺動性能が、上記処理
を施されない、従来のものに較べて大幅に向上し、耐焼
付性、耐摩耗性が著しく改善される。By the graphitization treatment, the flaky graphite structure of the inner layer material 32 on which the sliding surface 32a with the piston ring is formed is increased to 20% or more.
The sliding performance with the piston ring in 2a is greatly improved as compared with the conventional one not subjected to the above treatment, and the seizure resistance and wear resistance are remarkably improved.

【００３６】[0036]

【発明の効果】以上詳述したごとく、本発明によれば、
銅製の外層材の内面に、高Ｃ−高Ｓｉ−高Ｆｅ系の鋳鉄
系材料を粉末プラズマ肉盛溶接して内層材を形成するの
で、高い耐焼付性、耐摩耗性を有する摺動面が得られる
と友に、内層材の厚さを薄肉とし、高強度の鋼材からな
る外層材を強度部材とすることが可能となり、これによ
り、従来の鋳鉄製ライナの半分の肉厚で以って同等の強
度を有する軽量コンパクトでかつ低コストのシリンダラ
イナを得ることができる。As described in detail above, according to the present invention,
A high C-high Si-high Fe-based cast iron-based material is powder-plasma overlay welded on the inner surface of the copper outer layer material to form the inner layer material, so that a sliding surface having high seizure resistance and wear resistance is obtained. Once obtained, the thickness of the inner layer material can be reduced, and the outer layer material made of high-strength steel material can be used as a strength member. With this, the wall thickness is half that of the conventional cast iron liner. A lightweight, compact, and low-cost cylinder liner having the same strength can be obtained.

【００３７】また、請求項５のように構成すれば、上記
に加えて内層材の片状黒鉛組織を２０％以上に増大せし
めることが可能となって、高い耐焼付性、耐摩耗性を有
するシリンダライナが得られる。Further, according to the fifth aspect, in addition to the above, the flaky graphite structure of the inner layer material can be increased to 20% or more, and high seizure resistance and wear resistance can be obtained. A cylinder liner is obtained.

【００３８】以上のように本発明によれば、大型ディー
ゼルエンジン用シリンダライナに適合できる高い強度、
耐焼付性及び耐摩耗性を有し、かつ従来の鋳鉄製ライナ
と同程度のコストで以って製造できるシリンダライナを
提供することができる。As described above, according to the present invention, a high strength suitable for a cylinder liner for a large diesel engine,
It is possible to provide a cylinder liner which has seizure resistance and wear resistance and can be manufactured at a cost similar to that of a conventional cast iron liner.

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

【図１】本発明の第１実施形態に係る二層シリンダライ
ナの要部縦断面図である。FIG. 1 is a longitudinal sectional view of a main part of a two-layer cylinder liner according to a first embodiment of the present invention.

【図２】上記第１実施形態の変形例を示す図１応当図で
ある。FIG. 2 is a diagram corresponding to FIG. 1 showing a modification of the first embodiment.

【図３】上記第１実施形態における内層材の成分構成例
を示す表である。FIG. 3 is a table showing a component configuration example of an inner layer material in the first embodiment.

【図４】上記第１実施形態におけるシリンダライナの耐
摩耗性比較線図である。FIG. 4 is a wear resistance comparison diagram of the cylinder liner according to the first embodiment.

【図５】上記第１実施形態におけるシリンダライナの耐
焼付性比較線図である。FIG. 5 is a seismic resistance comparison diagram of the cylinder liner according to the first embodiment.

【図６】本発明の第２実施形態に係る二層シリンダライ
ナの要部断面図である。FIG. 6 is a sectional view of a main part of a two-layer cylinder liner according to a second embodiment of the present invention.

【図７】上記第２実施形態における熱処理要領図であ
る。FIG. 7 is a view showing a heat treatment procedure in the second embodiment.

【図８】従来の単層鋳鉄製シリンダライナを示す外観図
である。FIG. 8 is an external view showing a conventional single-layer cast iron cylinder liner.

【符号の説明】 １ シリンダライナ １Ａ 上部ライナ ２１、３１ 外層材 ２２、３２ 内層材 ２２ａ、２３ａ、３２ａ 摺動面 ２３ 下部ライナ[Description of Signs] 1 Cylinder liner 1A Upper liner 21, 31 Outer layer material 22, 32 Inner layer material 22a, 23a, 32a Sliding surface 23 Lower liner

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 筒状の外層材の内側に、内周にピストン
の摺動面が形成される筒状の内層材を固定してなる二層
シリンダライナであって、 前記外層材は、炭素銅、低合金銅等の溶接可能な鋼材に
て構成され、 前記内層材は、高Ｃ（炭素）−高Ｓｉ（珪素）−高Ｆｅ
（鉄）系の鋳鉄系材料を前記外層材に粉体プラズマ肉盛
溶接して構成されたことを特徴とする二層シリンダライ
ナ。1. A two-layer cylinder liner in which a cylindrical inner layer material having a piston sliding surface formed on an inner periphery is fixed inside a cylindrical outer layer material, wherein the outer layer material is made of carbon. The inner layer material is made of high C (carbon) -high Si (silicon) -high Fe
A two-layer cylinder liner comprising an (iron) -based cast iron-based material and a powder plasma overlay welding to the outer layer material. 【請求項２】 前記内層材の鋳鉄系材料が、少なくとも
Ｃ（炭素）＝４．５〜５．５％、Ｓｉ（珪素）＝２〜３
％、Ｍｎ（マンガン）≒１．０％、銅（Ｃｕ）≦１．０
％、Ｐ（リン）≦１．０％、Ｃｒ（クロム）＜１．０
％、Ｆｅ（鉄）＝残部にて構成された請求項１記載の二
層シリンダライナ。2. The cast iron-based material of the inner layer material has at least C (carbon) = 4.5 to 5.5% and Si (silicon) = 2 to 3
%, Mn (manganese) ≒ 1.0%, copper (Cu) ≦ 1.0
%, P (phosphorus) ≦ 1.0%, Cr (chromium) <1.0
2. The two-layer cylinder liner according to claim 1, wherein Fe, Fe = remainder. 【請求項３】 前記外層材及び内層材からなる二層ライ
ナの下方に、内周に摺動面を有する鋳鉄材からなる下部
ライナをボルト等により固着してなる請求項１あるいは
２記載の二層シリンダライナ。3. The two-layer liner according to claim 1, wherein a lower liner made of a cast iron material having a sliding surface on an inner periphery is fixed below the two-layer liner made of the outer layer material and the inner layer material by bolts or the like. Layer cylinder liner. 【請求項４】 外層材の内側に、内周にピストンの摺動
面が形成される内層材を固定してなる二層シリンダライ
ナを製造するにあたり、 炭素銅、低合金銅等の溶接可能な銅材により、筒状の外
層材を成形し、該外層材の内周に、高Ｃ（炭素）−高Ｓ
ｉ（珪素）−高Ｆｅ（鉄）系の鋳鉄系材料の粉末をプラ
ズマ肉盛溶接により肉盛りして、内層材を形成すること
を特徴とする二層シリンダライナの製造方法。4. When manufacturing a two-layer cylinder liner in which an inner layer material in which a piston sliding surface is formed on an inner periphery is fixed inside an outer layer material, it is possible to weld carbon copper, low alloy copper, or the like. A cylindrical outer layer material is formed from a copper material, and a high C (carbon) -high S
A method of manufacturing a two-layer cylinder liner, comprising forming an inner layer material by building up an i (silicon) -high Fe (iron) cast iron-based material powder by plasma build-up welding. 【請求項５】 前記プラズマ肉盛溶接施工後のシリンダ
ライナを熱処理炉内において、９００〜９５０℃にて
｛ライナ肉厚（ｍｍ）／２５（ｍｍ）｝時間保持後、炉
冷却する黒鉛化処理を施し、次いで、該シリンダライナ
について、５００〜６００℃にて｛ライナ肉厚（ｍｍ）
／２５（ｍｍ）｝時間保持後、炉冷却する残留応力除去
処理を施す請求項４記載のシリンダライナの製造方法。5. A graphitization process in which the cylinder liner after the plasma overlay welding is held in a heat treatment furnace at 900 to 950 ° C. for {liner thickness (mm) / 25 (mm)} hours and then cooled in the furnace. , And then, at 500 to 600 ° C., the thickness of the cylinder liner (mm)
5. The method for manufacturing a cylinder liner according to claim 4, wherein the residual stress is removed by cooling the furnace after holding for / 25 (mm) hours.
JP28010796A 1996-09-30 1996-09-30 Double-layer cylinder liner and method of manufacturing the same Expired - Fee Related JP3595420B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28010796A JP3595420B2 (en) 1996-09-30 1996-09-30 Double-layer cylinder liner and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28010796A JP3595420B2 (en) 1996-09-30 1996-09-30 Double-layer cylinder liner and method of manufacturing the same

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Publication Number Publication Date
JPH10103150A true JPH10103150A (en) 1998-04-21
JP3595420B2 JP3595420B2 (en) 2004-12-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100359038C (en) * 2003-09-03 2008-01-02 兰州理工大学 Slurry pump cylinder jacket inner wall spray smelting device and its method
WO2020105938A1 (en) * 2018-11-20 2020-05-28 김성규 Cylinder liner having wear resistance and heat resistance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100359038C (en) * 2003-09-03 2008-01-02 兰州理工大学 Slurry pump cylinder jacket inner wall spray smelting device and its method
WO2020105938A1 (en) * 2018-11-20 2020-05-28 김성규 Cylinder liner having wear resistance and heat resistance
KR20200058800A (en) * 2018-11-20 2020-05-28 김성규 Wear resistance and heat resistance cylinder liner

Also Published As

Publication number Publication date
JP3595420B2 (en) 2004-12-02

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