JP2796582B2 - Overlay welding method of overlay material to engine valve - Google Patents
Overlay welding method of overlay material to engine valveInfo
- Publication number
- JP2796582B2 JP2796582B2 JP2180660A JP18066090A JP2796582B2 JP 2796582 B2 JP2796582 B2 JP 2796582B2 JP 2180660 A JP2180660 A JP 2180660A JP 18066090 A JP18066090 A JP 18066090A JP 2796582 B2 JP2796582 B2 JP 2796582B2
- Authority
- JP
- Japan
- Prior art keywords
- overlay
- layer
- engine valve
- valve
- torch
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、エンジンバルブの弁フェース部に、硬質か
つ高耐摩耗性を有する盛金材料を肉盛溶接する方法に関
する。Description: FIELD OF THE INVENTION The present invention relates to a method of overlay welding a hard metal material having high wear resistance to a valve face of an engine valve.
エンジンバルブの弁フェース部は、高負荷、高サイク
ルの繰返し荷重を受けるため、母材単体のままでは著し
く摩耗する。そのため、弁フェース部に、硬質かつ高耐
摩耗性の盛金材料、例えばステライト等の合金粉末を肉
盛溶接して、耐摩耗性を高めるようにしている。Since the valve face of the engine valve receives a high load and a high cycle load, the base face alone wears remarkably. Therefore, a hard metal material having high wear resistance, for example, an alloy powder such as stellite is overlay-welded to the valve face portion to increase wear resistance.
このような肉盛溶接は、通常、第３図に示すようなプ
ラズマ溶接装置を用いて行なわれる。Such overlay welding is usually performed using a plasma welding apparatus as shown in FIG.
垂直面に対してほぼ30゜傾斜させた回転台（１）上
に、エンジンバルブ（２）の傘部（2a）を載置し、回転
台（１）を一定方向に回転させつつ、弁フェース部（2
b）の直上に臨ませたトーチ（３）の先端よりプラズマ
アーク（４）を発生させる。The umbrella portion (2a) of the engine valve (2) is placed on the turntable (1) inclined approximately 30 ° with respect to the vertical plane, and while the turntable (1) is rotated in a certain direction, the valve face is rotated. Department (2
A plasma arc (4) is generated from the tip of the torch (3) facing directly above b).
これと同時に、トーチ（３）の先端のノズルより、粉
末状のステライト（５）を供給し、プラズマアーク
（４）の熱により、ステライト（５）と弁フェース部
（2b）の表層とを溶融させながら、傘部（2a）を軸線ま
わりに１周させることにより、弁フェース部（2b）に形
成された環状凹溝（2c）の全面に肉盛り（６）が施され
る。At the same time, powdery stellite (5) is supplied from the nozzle at the tip of the torch (3), and the stellite (5) and the surface layer of the valve face (2b) are melted by the heat of the plasma arc (4). By causing the umbrella portion (2a) to make one revolution around the axis while making it, the padding (6) is applied to the entire surface of the annular groove (2c) formed in the valve face portion (2b).
最近の自動車用エンジンは、過給器を装着したり、多
弁機構を採用するなど、高速、高回転、高負荷及び高出
力化の傾向にあり、かつ排気ガス清浄化の観点から、弁
フェース部等に潤滑効果のある物質（例えば四エチル鉛
等）を含まない燃料が使用される傾向にある。Recent automobile engines tend to be high-speed, high-speed, high-load, and high-output, for example, by installing a supercharger or adopting a multi-valve mechanism. There is a tendency to use a fuel which does not contain a substance having a lubricating effect (for example, tetraethyl lead or the like).
また、ディーゼルエンジンにおいては、使用される燃
料の点から、優れた耐食性、耐酸化性が要求される。Diesel engines are required to have excellent corrosion resistance and oxidation resistance in view of the fuel used.
このようなエンジンに用いられるエンジンバルブやバ
ルブシートには、優れた高温強度や高温耐食性などの高
温特性並びに高い耐摩耗性が要求される。Engine valves and valve seats used in such engines are required to have high-temperature properties such as excellent high-temperature strength and high-temperature corrosion resistance and high wear resistance.
しかし、上記のようにステライト単体からなる盛金材
料を、エンジンバルブの弁フェース部やバルブシートの
シート部に肉盛溶接したのみでは、要求される十分な高
温特性や耐摩耗性等を得ることが難しい。However, as described above, only the build-up material consisting of stellite alone is overlay-welded to the valve face portion of the engine valve or the seat portion of the valve seat to obtain the required sufficient high-temperature characteristics and wear resistance. Is difficult.
そこで本願出願人は、上記ステライトに代わる高耐摩
耗性を有する盛金材料として、Co基合金からなるステラ
イト粉末をベースとし、これに高比重かつ高融点の炭化
物系の粉末を添加した複合盛金材料と、同じくCo基合金
からなるトリバロイ（デュポン社の登録商標）粉末をベ
ースとし、これに同じく炭化物系の粉末を添加した複合
盛金材料とを開発し、これらを平成２年５月30日に出願
している（特願平２−138448号、特願平２−138449
号）。Therefore, the applicant of the present application has developed a composite ferrite based on a stellite powder made of a Co-based alloy as a ferrite material having a high wear resistance in place of the stellite, and to which a carbide-based powder having a high specific gravity and a high melting point is added. And a composite ferrite material based on Tribaloy (registered trademark of DuPont) powder, also made of a Co-based alloy, and with the addition of a carbide-based powder, which was developed on May 30, 1990. (Japanese Patent Application No. 2-138448, Japanese Patent Application No. 2-138449)
issue).
上記両複合盛金材料は、炭化物系の粉末の添加割合が
増加するにしたがって、ベース材中における析出炭化物
の占める割合が増大して、肉盛部の硬度が比例的に高ま
る特性を有しているが、次のような問題を生じることが
ある。The above two composite filler materials have a characteristic that, as the addition ratio of the carbide-based powder increases, the ratio of the precipitated carbide in the base material increases, and the hardness of the overlay portion increases proportionally. However, the following problems may occur.
すなわち、上記した複合盛金材料を、上述のステライ
ト単体と同様に、単にワークを１回転させて、１度に所
要量肉盛溶接すると、前者のステライトをベースとした
ものにおいては、ステライトよりも高比重で、かつ融点
の高い炭化物系の粉末が、未溶融又は半溶融状態のま
ま、母材との境界部に沈降して集積し、耐摩耗性の最も
必要な弁フェースの表層部に、炭化物による析出硬化層
が形成されないことがある。In other words, the above-mentioned composite overlay material, just like the above-mentioned stellite alone, simply rotates the work once and welds the required amount at a time. High specific gravity, and high melting point carbide-based powder, unmelted or semi-molten, settles and accumulates at the boundary with the base material, and in the surface layer of the most necessary wear-resistant valve face, A precipitation hardened layer made of carbide may not be formed.
また、トリバロイをベースとした後者のものは、トリ
バロイ自身が比較的高い融点を有するとともに、炭化物
系の粉末の融点がそれ以上に高いため、炭化物系の粉末
の添加割合が増えるにしたがって、肉盛り時における湯
流れ性が悪くなり、ピンホールや未溶着等の内部欠陥が
発生したり、冷却収縮時において肉盛部に割れが生じた
りするなど、組織が不安定となる場合がある。In addition, in the latter case based on tribaloy, the tribaloy itself has a relatively high melting point and the melting point of the carbide-based powder is higher than that. In some cases, the flowability of the molten metal deteriorates, causing internal defects such as pinholes and non-welding, and the formation of cracks in the overlay during cooling shrinkage, resulting in an unstable structure.
本発明は、上記課題に鑑みてなされたもので、その目
的とするところは、炭化物系の粉末が母材との境界部に
沈降するのを防止するとともに、盛金材料の溶着性や湯
流れ性を向上させ、もって肉盛部の表層の硬度を高め
て、耐摩耗性に優れる弁フェース部等が形成されるよう
にした、エンジンバルブへの盛金材料の肉盛溶接方法を
提供することにある。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to prevent the carbide-based powder from settling at a boundary with a base material, and at the same time, to weld a metal material and to flow a molten metal. To provide a method for overlay welding of an overlay material to an engine valve, in which the hardness of the surface layer of the overlay portion is increased so that a valve face portion or the like having excellent wear resistance is formed. It is in.
本発明によると、上記目的は、エンジンバルブの弁フ
ェース部に形成された環状凹溝に、母材と異なる盛金材
料を肉盛溶接するに際し、エンジンバルブをその軸線ま
わりに一定方向に回転させつつ、前記軸線に対してほぼ
対称的に配置された２つのトーチを備える肉盛溶接装置
における一方のトーチに盛金材料を供給して、前記環状
凹溝内に、予定の肉盛厚さよりも薄肉の第１層目の肉盛
溶接を施しつつ、肉盛溶接装置における他方のトーチに
より、前記第１層目の肉盛りの上面に、肉盛全体の厚さ
が、予定の厚さとなるように、第２層目の肉盛溶接を施
すことにより達成される。According to the present invention, the above object is to provide a method of overlay welding of an embankment material different from a base material to an annular concave groove formed in a valve face portion of an engine valve, by rotating the engine valve in a fixed direction about its axis. In the meantime, a filling material is supplied to one of the torches in the overlay welding apparatus having two torches arranged substantially symmetrically with respect to the axis, and a predetermined thickness of the overlay is increased in the annular groove. While performing the thin first-layer build-up welding, the other torch in the build-up welding apparatus causes the entire thickness of the build-up to be a predetermined thickness on the upper surface of the first-layer build-up. Is achieved by performing a second-layer overlay welding.
盛金材料を複数に分けて肉盛溶接するので、盛金材料
中に含まれる高比重かつ高融点の粉末、例えば炭化物系
の粉末が母材との境界部に沈降するのが防止される。Since the overlay material is divided into a plurality of parts and overlay welding is performed, powder having a high specific gravity and a high melting point, for example, a carbide powder, contained in the overlay material is prevented from settling at the boundary with the base material.
また１回当たりの盛金材料の供給量が減るので、盛金
材料の溶融性、湯流れ性が向上し、母材との溶着性が高
まる。Further, since the supply amount of the filling material per one time is reduced, the melting property and the flowability of the filling material are improved, and the welding property with the base material is enhanced.
以下、本発明の実施例を、第１図および第２図に基づ
いて説明する。Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
なお、第３図に示す従来例と同様の部材には、同じ符
号を付して、説明を省略する。The same members as those in the conventional example shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
第１図に示すように、基本的には従来と同様のプラズ
マ溶接装置におけるほぼ水平の回転台（１）には、傘部
（2a）における弁フェース部（2b）に環状凹溝（2c）が
予め形成されているエンジンバルブ（２）が、その傘部
（2a）を下方として、妄りに動くことのないように、垂
直状態で適宜載置して保持されている。As shown in FIG. 1, a substantially horizontal turntable (1) in a plasma welding apparatus basically similar to the conventional one has an annular concave groove (2c) in a valve face part (2b) in an umbrella part (2a). The engine valve (2), which is formed in advance, is appropriately placed and held in a vertical state with its umbrella (2a) facing downward so as not to move unnecessarily.
上記弁フェース部（2b）の左右両側方には、エンジン
バルブ（２）の軸線に対してほぼ対称的に配置された、
下端が弁フェース部（2b）の方向を向くように、エンジ
ンバルブ（２）の中心方向へ向けて傾斜させた第１層目
肉盛り用トーチ（11）と、第２層目肉盛り用トーチ（1
2）とが設置されている。On both left and right sides of the valve face portion (2b), they are arranged substantially symmetrically with respect to the axis of the engine valve (2).
A first-layer torch (11) and a second-layer torch that are inclined toward the center of the engine valve (2) so that the lower end faces the direction of the valve face (2b). (1
2) is installed.
まず、第１層目肉盛り用トーチ（11）の先端から、不
活性シールドガスで囲まれたプラズマアーク（４）を発
生させ、かつそれと同時に、粉末状の盛金材料（８）、
例えばステライトのベース材に、炭化物系の粉末である
炭化クロム（Cr3C2）か炭化ニオブ（NbC）等を適量添加
した複合盛金材料、又はトリバロイのベース材に同じく
炭化クロム（Cr3C2）か炭化ニオブ（NbC）等を適量添加
した複合盛金材料を供給し、エンジンバルブ（２）が１
周する間に、肉盛部の厚さが予定の肉盛厚さのほぼ半分
となるように、環状凹溝（2c）の全面に第１層目の肉盛
り（９）を施す。First, a plasma arc (4) surrounded by an inert shielding gas is generated from the tip of the first-layer overlay torch (11), and at the same time, a powdered metal material (8),
For example, a composite material in which an appropriate amount of chromium carbide (Cr 3 C 2 ) or niobium carbide (NbC), which is a carbide powder, is added to a stellite base material, or a chromium carbide (Cr 3 C 2 ) Supply a composite ferrite material to which an appropriate amount of niobium carbide (NbC) or the like is added, and set the engine valve (2) to 1
During the rotation, the first-layer build-up (9) is applied to the entire surface of the annular groove (2c) such that the thickness of the build-up portion is substantially half the expected build-up thickness.
ついで、エンジンバルブ（２）が約半回転して、第１
層目の肉盛り（９）部の先端が第１層目肉盛り用トーチ
（11）と対称的に設けられた第２層目肉盛り用トーチ
（12）の直下まで来たとき、このトーチ（12）の先端よ
りプラズマアーク（14）を発生させると同時に、盛金材
料（８）を供給して、続いて移動してくる半周分の第１
層目の肉盛り（９）の上面に、第２層目の肉盛り（10）
を施し、所定の肉盛厚さとする。Then, the engine valve (2) rotates about half a
When the tip of the cladding (9) of the layer reaches just below the torch (12) of the second layer provided symmetrically with the torch (11) of the first layer, this torch is used. A plasma arc (14) is generated from the tip of (12), and at the same time, a filling material (8) is supplied, and the first half of the next moving half circle
On the upper surface of the layer (9), the second layer (10)
To a predetermined overlay thickness.
エンジンバルブ（２）がさらに半回転して、環状凹溝
（2c）の残りの半周に第１層目の肉盛り（９）が施され
た時、第１層目肉盛り用トーチ（11）よりのプラズマア
ーク（13）と盛金材料（８）の供給を停止し、さらにエ
ンジンバルブ（２）が半回転して、第１層目の肉盛り
（９）の上面の全面に第２層目の肉盛り（10）が施され
た時、第２層目肉盛り用トーチ（12）よりのプラズマア
ーク（14）と盛金材料（８）の供給を停止させる。When the engine valve (2) is further rotated by a half and the first half of the cladding (9) is formed on the other half of the annular groove (2c), the first layer of the torch (11) is formed. The supply of the plasma arc (13) and the filling material (8) is stopped, and the engine valve (2) is further rotated half a turn to cover the entire surface of the upper surface of the first layer (9) with the second layer. When the overlay (10) is applied, the supply of the plasma arc (14) and the overlay material (8) from the second layer overlay torch (12) is stopped.
このように連続して２回に亘って肉盛りを施すため、
弁フェース部（2b）には、第２図に示すように、第１層
目の肉盛り（９）と第２層目の肉盛り（10）との２層か
らなる肉盛部が形成され、かつ第２層目の肉盛り（10）
を施す際において、盛金材料（８）中の炭化クロムや炭
化ニオブ等の高比重かつ融点の高い粉末が、母材との境
界部、すなわち環状凹溝（2c）付近に沈降するのが防止
されるので、弁フェース部（2b）の表層部に、炭化物が
効果的に析出して、その硬度は著しく高められる。In order to apply the overlay twice in this way,
As shown in FIG. 2, the valve face portion (2b) has a built-up portion composed of two layers, a first-layer build-up (9) and a second-layer build-up (10). , And the second layer (10)
Prevention of powder having high specific gravity and high melting point, such as chromium carbide and niobium carbide, in the embankment material (8) settling at the boundary with the base material, that is, near the annular groove (2c). As a result, carbide is effectively deposited on the surface layer of the valve face (2b), and the hardness thereof is significantly increased.
また、盛金材料（８）を２分して、１周当たりの供給
量を減らしたことにより、盛金材料（８）の溶融性及び
湯流れ性は高まり、従って、盛金材料（８）に、融点の
高いトリバロイをベースとした複合盛金材料を用いた際
でも、母材への溶着性が損なわれる恐れはなく、ピンボ
ール等の内部欠陥や冷却収縮時における割れ等が防止さ
れる。In addition, by reducing the supply amount per round by dividing the embankment material (8) into two, the meltability and the flowability of the embankment material (8) are enhanced, and therefore, the embankment material (8) Even when a composite metal material based on tribaloy having a high melting point is used, there is no fear that the weldability to the base material is impaired, and internal defects such as pinball and cracks during cooling shrinkage are prevented. .
しかも、第２層目の肉盛り（10）時において、第１層
目の肉盛り（９）部の表層が加熱再溶融されるので、熱
ひずみや残留応力の発生するのが防止されるとともに、
徐冷効果により、冷却収縮時において肉盛部が割れるな
ど、不良品の発生率が極めて少なくなる。In addition, since the surface layer of the first layer (9) is heated and re-melted at the time of the second layer (10), generation of thermal strain and residual stress is prevented. ,
Due to the gradual cooling effect, the occurrence rate of defective products such as cracking of the built-up portion during cooling shrinkage is extremely reduced.
上記実施例では、トーチ（11）と（12）の位置は、互
いに180゜異ならせて配置してあるが、その位置は適宜
である。In the above embodiment, the positions of the torches (11) and (12) are different from each other by 180 °, but the positions are appropriate.
本発明の方法は、上記炭化クロム（Cr3C2）や炭化ニ
オブ（NbC）を添加した盛金材料の外、ステライト又は
トリバロイをベース材とし、これにWC,TiC,TaCなどの炭
化物、TiN,TaNなどの窒化物及びAl2O3,ZrO2などの酸化
物等を添加した複合盛金材料を用いた際にも効果的であ
る。The method of the present invention uses a base material of stellite or tribaloy, in addition to the above-mentioned ferrite material to which chromium carbide (Cr 3 C 2 ) or niobium carbide (NbC) is added, and a carbide such as WC, TiC, TaC, TiN It is also effective when a composite metal material to which a nitride such as TaN or the like and an oxide such as Al 2 O 3 or ZrO 2 is added is used.
本発明の実施に用いる溶接装置は、上記プラズマ溶接
装置以外に、酸素−アセチレンガスやその他の溶接手段
でもよい。The welding device used for carrying out the present invention may be an oxygen-acetylene gas or other welding means other than the plasma welding device.
本発明によれば、次のような効果が得られる。 According to the present invention, the following effects can be obtained.
（ａ）盛金材料中に含まれる高比重かつ高融点の粉末
が、肉盛部の表層に分布されるので、弁フェース部の表
層の硬度及び耐摩耗性を著しく高めうる。(A) Since the powder having a high specific gravity and a high melting point contained in the overlay material is distributed on the surface layer of the build-up portion, the hardness and wear resistance of the surface layer of the valve face portion can be significantly increased.
（ｂ）盛金材料の溶融性、湯流れ性が向上して、母材と
の溶着性が高まるので、ピンホール等の内部欠陥や冷却
収縮時の割れなどの発生するのが防止され、均一でかつ
品質の高い肉盛部が得られる。(B) Since the meltability and flowability of the metal material are improved and the weldability with the base material is enhanced, internal defects such as pinholes and cracks upon cooling shrinkage are prevented from occurring, and uniformity is achieved. And a high quality overlay is obtained.
（ｃ）連続して２回に亘って肉盛りが施されるため、弁
フェース部には、第１層目の肉盛りと第２層目の肉盛り
との２層からなる肉盛部が形成され、かつ第２層目の肉
盛りを施す際において、盛金材料中の炭化クロムや炭化
ニオブ等の高比重かつ融点の高い粉末が、母材との境界
部、すなわち環状凹溝付近に沈降するのが防止されるの
で、弁フェース部の表層部に、炭化物が効果的に析出し
て、その硬度は著しく高められる。(C) Since the cladding is performed twice in succession, the valve face portion has a cladding portion composed of two layers of the first layer and the second layer. At the time of forming and overlaying the second layer, a powder having a high specific gravity and a high melting point, such as chromium carbide or niobium carbide, in the embossing material is placed near the boundary with the base material, that is, in the vicinity of the annular groove. Since sedimentation is prevented, carbides are effectively deposited on the surface layer portion of the valve face portion, and the hardness is significantly increased.
（ｄ）盛金材料を２分して、１周当たりの供給量を減ら
したことにより、盛金材料の溶融性及び湯流れ性は高ま
り、従って、盛金材料に、融点の高いトリバロイをベー
スのした複合盛金材料を用いた際でも、母材への溶着性
が損なわれる恐れはなく、ピンホール等の内部欠陥や冷
却収縮時における割れ等が防止される。(D) By reducing the amount of supply per round by dividing the fill material into two, the meltability and flowability of the fill material are increased, and therefore, a tribaloy having a high melting point is used as the fill material. Even when the composite metal material is used, there is no fear that the weldability to the base material is impaired, and internal defects such as pinholes and cracks during cooling shrinkage are prevented.
（ｃ）第２層目の肉盛り時において、第１層目の肉盛り
部の表層が加熱再溶融されるので、熱ひずみや残留応力
の発生するのが防止されるとともに、徐冷効果により、
冷却収縮時において肉盛部が割れるなど、不良品の発生
率が極めて小さくなる。(C) At the time of overlaying the second layer, the surface layer of the overlaying portion of the first layer is heated and re-melted, so that the occurrence of thermal strain and residual stress is prevented and the slow cooling effect is achieved. ,
The occurrence rate of defective products such as cracking of the build-up portion during cooling shrinkage becomes extremely small.
第１図は、本発明の方法の一実施例を示す概略説明図で
ある。 第２図は、第１層目及び第２層目の肉盛りが施されたエ
ンジンバルブの弁フェース部を示す拡大縦断面図であ
る。 第３図は、従来の肉盛溶接方法を示す概略説明図であ
る。 （１）回転台 （２）エンジンバルブ （2a）傘部 （2b）弁フェース部 （2c）環状凹溝 （３）トーチ （４）プラズマアーク （８）盛金材料 （９）（10）肉盛り （11）第１層目肉盛り用トーチ （12）第２層目肉盛り用トーチ （13）（14）プラズマアークFIG. 1 is a schematic explanatory view showing one embodiment of the method of the present invention. FIG. 2 is an enlarged vertical sectional view showing a valve face portion of the engine valve in which the first and second layers are overlaid. FIG. 3 is a schematic explanatory view showing a conventional overlay welding method. (1) Turntable (2) Engine valve (2a) Head (2b) Valve face (2c) Annular groove (3) Torch (4) Plasma arc (8) Filling material (9) (10) Overlay (11) 1st layer overlay torch (12) 2nd layer overlay torch (13) (14) Plasma arc
Claims (1)
た環状凹溝に、母材と異なる盛金材料を肉盛溶接するに
際し、エンジンバルブをその軸線まわりに一定方向に回
転させつつ、前記軸線に対してほぼ対称的に配置された
２つのトーチを備える肉盛溶接装置における一方のトー
チに盛金材料を供給して、前記環状凹溝内に、予定の肉
盛厚さよりも薄肉の第１層目の肉盛溶接を施しつつ、肉
盛溶接装置における他方のトーチにより、前記第１層目
の肉盛りの上面に、肉盛全体の厚さが、予定の厚さとな
るように、第２層目の肉盛溶接を施すことを特徴とする
エンジンバルブへの盛金材料の肉盛溶接方法。When an overlay material is welded to an annular groove formed in a valve face portion of an engine valve, the engine valve is rotated in a fixed direction about an axis of the engine valve. In the overlay welding apparatus including two torches arranged substantially symmetrically with respect to the first, a filling material is supplied to one torch, and a first thinner than the predetermined overlay thickness is supplied into the annular groove. While performing the overlay welding of the layer, the second torch in the overlay welding apparatus is used to form the second overlay on the upper surface of the overlay of the first layer so that the entire thickness of the overlay becomes a predetermined thickness. A method for overlay welding of an overlay material to an engine valve, wherein overlay welding of a layer is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180660A JP2796582B2 (en) | 1990-07-10 | 1990-07-10 | Overlay welding method of overlay material to engine valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180660A JP2796582B2 (en) | 1990-07-10 | 1990-07-10 | Overlay welding method of overlay material to engine valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0471781A JPH0471781A (en) | 1992-03-06 |
| JP2796582B2 true JP2796582B2 (en) | 1998-09-10 |
Family
ID=16087089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2180660A Expired - Lifetime JP2796582B2 (en) | 1990-07-10 | 1990-07-10 | Overlay welding method of overlay material to engine valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2796582B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104096958B (en) * | 2014-06-27 | 2015-12-02 | 武汉理工大学 | A kind of plasma surfacing preparation method of ceramic reinforced metal base compound layer |
| JP6227618B2 (en) * | 2015-11-30 | 2017-11-08 | Ｊｆｅスチール株式会社 | Method for producing sleeve in molten metal plating bath and method for producing molten metal plated steel sheet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6448673A (en) * | 1987-08-17 | 1989-02-23 | Nippon Steel Corp | Build-up welding method for engine valve |
-
1990
- 1990-07-10 JP JP2180660A patent/JP2796582B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0471781A (en) | 1992-03-06 |
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