JPH05288274A - Steel cylinder liner and its manufacture - Google Patents
Steel cylinder liner and its manufactureInfo
- Publication number
- JPH05288274A JPH05288274A JP9106492A JP9106492A JPH05288274A JP H05288274 A JPH05288274 A JP H05288274A JP 9106492 A JP9106492 A JP 9106492A JP 9106492 A JP9106492 A JP 9106492A JP H05288274 A JPH05288274 A JP H05288274A
- Authority
- JP
- Japan
- Prior art keywords
- liner
- powder material
- laser
- steel
- wear
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はディーゼルエンジンのシ
リンダライナに関する。FIELD OF THE INVENTION The present invention relates to a cylinder liner for a diesel engine.
【０００２】[0002]
【従来の技術】ディーゼルエンジン用シリンダライナの
使用材料としては通常摺動性の優れた鋳鉄（ＦＣ材）が
用いられているが、この鋳鉄は強度が弱く、この鋳鉄の
強度不足を補うため最近熱間静水圧加工法（ＨＩＰ）等
によるスチールと鋳鉄のハイブリッド技術を利用して内
層は従来材の鋳鉄とし外層はスチールとしたライナが開
発されている。2. Description of the Related Art Cast iron (FC material) having excellent slidability is usually used as a material for a cylinder liner for a diesel engine. However, this cast iron has a weak strength. A liner having a conventional cast iron inner layer and steel outer layer has been developed by utilizing a hybrid technology of steel and cast iron such as hot isostatic pressing (HIP).
【０００３】[0003]
【発明が解決しようとする課題】従来鋳鉄製のライナの
場合、鋳鉄の組織中の黒鉛（グラファイト）が油溜りと
なって潤滑油保持の役割を果たし、ピストン摺動時の耐
焼付性は優れているが、ライナ外周上部の肩のＲ部等で
はシリンダカバーの初期ボルト締付穴や運転時の変動応
力が比較的高く強度不足のためクラック等が発生する可
能性がある。In the case of a conventional cast iron liner, graphite in the structure of cast iron serves as an oil reservoir to retain lubricating oil, and seizure resistance during piston sliding is excellent. However, in the R portion of the shoulder at the upper part of the outer periphery of the liner, the initial bolt tightening hole of the cylinder cover and the fluctuating stress during operation are relatively high, and cracks may occur due to insufficient strength.
【０００４】一方ライナ材としてスチールを使用した場
合外周の強度は確保できるが内面が焼付やすいという決
定的な短所がある。外層をスチール、内層を鋳鉄とした
ライナはこれらの欠点を補うべく開発されたものである
が、上述した熱間静水圧加工法処理には多大な費用と手
間を要し、ライナ１本当りのコストが高くつき採算面の
問題が残る。On the other hand, when steel is used as the liner material, the strength of the outer circumference can be secured, but there is a definite disadvantage that the inner surface is easily seized. A liner with steel as the outer layer and cast iron as the inner layer was developed to compensate for these drawbacks, but the above-mentioned hot isostatic pressing process requires a great deal of cost and labor, and is not suitable for each liner. The cost is high and the problem of profitability remains.
【０００５】本発明は、かかる問題点に対処するため開
発されたものであって、強度確保の点からスチール製の
ライナとするもその耐摩耗性の向上を図ることを目的と
する。The present invention was developed in order to cope with such a problem, and an object of the present invention is to improve wear resistance of a steel liner in order to secure strength.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の構成を実施例に対応する図１を用いて説明
すると本発明は鋼製シリンダライナの内周全面に金属炭
化物等の耐摩耗性粉末材料を積層し、該耐摩耗性粉末材
料の積層部に部分的な硬化層を形成させたことを特徴と
する。A structure of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The present invention is such that metal carbide or the like is formed on the entire inner surface of a steel cylinder liner. A wear-resistant powder material is laminated, and a partial hardened layer is formed on the laminated portion of the wear-resistant powder material.
【０００７】更に本発明は鋼製シリンダライナの内周全
面に金属炭化物等の耐摩耗性粉末材料を積層する第一工
程と、該耐摩耗性粉末材料を部分的にレーザ照射して部
分的な硬化層を形成させる第二工程と、前記耐摩耗性粉
末材料にレーザ照射のない潤滑油の保油性能を有する粒
子間隙部を形成させる第三工程とからなる鋼製シリンダ
ライナの製造方法を特徴とする。The present invention further provides a first step of laminating a wear-resistant powder material such as metal carbide on the entire inner circumference of a steel cylinder liner, and partially irradiating the wear-resistant powder material with a laser to partially A method of manufacturing a steel cylinder liner comprising a second step of forming a hardened layer and a third step of forming a particle gap portion having a lubricating oil retaining performance without laser irradiation in the wear resistant powder material And
【０００８】[0008]
【作用】そして本発明は上記の手段によりライナ内面の
レーザ照射した部分は、硬化層が形成され、ライナ材の
摩耗量低減が期待できる。この硬化層はレーザの局部的
な急熱急冷作用により形成されるものであり、粉末材料
積層部の溶融凝固による緻密化・均一化あるいはライナ
材と粉末材料の合金化によって硬度が向上する。According to the present invention, a hardened layer is formed on the portion of the inner surface of the liner irradiated with the laser by the above means, and it can be expected that the wear amount of the liner material can be reduced. This hardened layer is formed by the local rapid heating and quenching action of the laser, and the hardness is improved by densification / uniformization by melting and solidification of the powder material laminated portion or alloying of the liner material and the powder material.
【０００９】また、レーザを照射していない未溶融部分
は粉末粒子間に隙間が存在するため、この部分が油溜り
となって潤滑油を保持させることができる。Further, since there is a gap between the powder particles in the unmelted portion which is not irradiated with the laser, this portion serves as an oil reservoir and can hold the lubricating oil.
【００１０】[0010]
【実施例】以下本発明の一実施例を図１及び図２に基づ
いて説明すると１はスチール製のライナを示し、該ライ
ナ１の内周全面にはタングステンカーバイト等の金属炭
化物の耐摩耗性粉末材料２を溶射法等によって積層させ
る。この粉末材料２を積層させたライナ１をレーザ加工
機３のローラ４上に乗せてライナ１を回転させながらレ
ーザ５を帯状に照射する。図１に示すレーザ加工機３は
ライナ１の軸方向（長手方向）及び回転方向の位置速度
などの制御ができるのでレーザ５を集光レンズ６で集光
した後ミラー７で反射させて一定位置に照射させておき
ライナ１をローラ４上で回転させながら軸方向に送る等
の方法でライナ１の位置を制御することにより様々な照
射パターンが可能となる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 denotes a steel liner, and the inner surface of the liner 1 has a wear resistance of metal carbide such as tungsten carbide. Powder material 2 is laminated by a thermal spraying method or the like. The liner 1 in which the powder material 2 is laminated is placed on the roller 4 of the laser processing machine 3 and the laser 5 is irradiated in a belt shape while rotating the liner 1. Since the laser processing machine 3 shown in FIG. 1 can control the position speed of the liner 1 in the axial direction (longitudinal direction) and the rotation direction, the laser 5 is condensed by the condenser lens 6 and then reflected by the mirror 7 to be positioned at a fixed position. It is possible to achieve various irradiation patterns by controlling the position of the liner 1 by a method such as irradiating the liner 1 on the roller 4 and sending it in the axial direction while rotating the liner 1 on the roller 4.
【００１１】これにより本実施例では螺旋状のパターン
で照射することにより螺旋状の硬化層が形成されること
となる。図２にはレーザ照射部の断面図を示す。レーザ
照射部の状況は、粉末材料２やレーザ照射条件により異
なるが、一般には粉末材料２の積層部の緻密化・均一化
あるいはスチール層との合金化により硬化層８が形成さ
れ、耐摩耗性が向上する。As a result, in this embodiment, the spiral hardened layer is formed by irradiating in a spiral pattern. FIG. 2 shows a sectional view of the laser irradiation part. The condition of the laser irradiation portion varies depending on the powder material 2 and the laser irradiation conditions, but generally, the hardened layer 8 is formed by densification / uniformization of the laminated portion of the powder material 2 or alloying with the steel layer, and wear resistance Is improved.
【００１２】一方レーザ未照部９の状況は粉末粒子１０
間に気泡１１等が存在し、この部分が油溜りの役割を来
たし、潤滑油の保油機能が維持できると考えられる。On the other hand, the unexposed portion 9 of the laser is powder particles 10
It is considered that there are bubbles 11 and the like between them, and this portion plays the role of an oil reservoir, so that the oil retaining function of the lubricating oil can be maintained.
【００１３】[0013]
【発明の効果】このように本発明によるときは鋼製シリ
ンダライナの内周全面に金属炭化物等の耐摩耗性粉末材
料を積層し、該耐摩耗性粉末材料を部分的に硬化させて
部分的硬化層を形成すると共に硬化されない潤滑油の保
油性能を有する粒子間隙部を形成するものであるから強
度の強いスチール製のライナにおいてもその内面の部分
的に硬化された耐摩耗性粉末材料は潤滑保持の役割を果
して潤滑性を向上することができまた粉末材料の積層と
して例えば溶射法を用いれば、溶射装置もレーザ加工装
置もいずれも自動化ラインに組込むことが可能であり、
熱間静水圧加工法処理等に比べて生産コストの大幅な低
減が期待できる等の効果を有する。As described above, according to the present invention, a wear-resistant powder material such as metal carbide is laminated on the entire inner circumference of a steel cylinder liner, and the wear-resistant powder material is partially cured to partially A hardened wear resistant powder material on the inner surface of a liner made of steel, which has a high strength, forms a hardened layer as well as a particle gap having the oil retaining performance of a non-hardened lubricating oil. It is possible to improve lubricity by playing a role of maintaining lubrication, and if, for example, a thermal spraying method is used as a stack of powder materials, both the thermal spraying device and the laser processing device can be incorporated in an automated line,
Compared with the hot isostatic pressing method, etc., the production cost can be expected to be significantly reduced.
【図１】本発明の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】レーザ照射部の断面図である。FIG. 2 is a cross-sectional view of a laser irradiation section.
１ シリンダライナ ２ 粉末材料 ５ レーザ ８ 硬化層 1 Cylinder liner 2 Powder material 5 Laser 8 Hardened layer
Claims (2)
化物等の耐摩耗性粉末材料を積層し、該耐摩耗性粉末材
料の積層部に部分的な硬化層を形成させたことを特徴と
する鋼製シリンダライナ。1. A wear resistant powder material such as a metal carbide is laminated on the entire inner circumference of a steel cylinder liner, and a partial hardened layer is formed at a laminated portion of the wear resistant powder material. Cylinder liner made of steel.
化物等の耐摩耗性粉末材料を積層する第一工程と、該耐
摩耗性粉末材料を部分的にレーザ照射して部分的な硬化
層を形成させる第二工程と、前記耐摩耗性粉末材料にレ
ーザ照射のない潤滑油の保油性能を有する粒子間隙部を
形成させる第三工程とからなる鋼製シリンダライナの製
造方法。2. A first step of laminating a wear-resistant powder material such as a metal carbide on the entire inner circumference of a steel cylinder liner, and partially hardening the wear-resistant powder material by laser irradiation. A method of manufacturing a steel cylinder liner, comprising: a second step of forming a particle gap portion having the oil retaining performance of a lubricating oil without laser irradiation in the wear resistant powder material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9106492A JPH05288274A (en) | 1992-04-10 | 1992-04-10 | Steel cylinder liner and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9106492A JPH05288274A (en) | 1992-04-10 | 1992-04-10 | Steel cylinder liner and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05288274A true JPH05288274A (en) | 1993-11-02 |
Family
ID=14016077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9106492A Withdrawn JPH05288274A (en) | 1992-04-10 | 1992-04-10 | Steel cylinder liner and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05288274A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073425A1 (en) * | 2004-01-28 | 2005-08-11 | Ford Global Technologies, Llc, Subsidiary Of Ford Motor Company | Ferrous layer for a sliding surface, in particular for cylinder running surfaces on engine blocks, applied by means of thermal spraying |
| KR100728841B1 (en) * | 2005-07-25 | 2007-06-19 | 두산인프라코어 주식회사 | Cylinder liner and method for producing thereof |
-
1992
- 1992-04-10 JP JP9106492A patent/JPH05288274A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073425A1 (en) * | 2004-01-28 | 2005-08-11 | Ford Global Technologies, Llc, Subsidiary Of Ford Motor Company | Ferrous layer for a sliding surface, in particular for cylinder running surfaces on engine blocks, applied by means of thermal spraying |
| KR100728841B1 (en) * | 2005-07-25 | 2007-06-19 | 두산인프라코어 주식회사 | Cylinder liner and method for producing thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990706 |