JPS6092079A - Powder build up welding - Google Patents

Powder build up welding

Info

Publication number
JPS6092079A
JPS6092079A JP20057683A JP20057683A JPS6092079A JP S6092079 A JPS6092079 A JP S6092079A JP 20057683 A JP20057683 A JP 20057683A JP 20057683 A JP20057683 A JP 20057683A JP S6092079 A JPS6092079 A JP S6092079A
Authority
JP
Japan
Prior art keywords
powder
welding
build
plasma
overlay welding
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.)
Pending
Application number
JP20057683A
Other languages
Japanese (ja)
Inventor
Hirokimi Takeuchi
竹内　宥公
Masa Nagata
永田　雅
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel Co 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 Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP20057683A priority Critical patent/JPS6092079A/en
Priority to DE19843438439 priority patent/DE3438439A1/en
Priority to GB08426689A priority patent/GB2148768B/en
Priority to US06/663,929 priority patent/US4621183A/en
Publication of JPS6092079A publication Critical patent/JPS6092079A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B23K9/044—Built-up welding on three-dimensional surfaces
    • B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • B23K9/296—Supporting devices adapted for making use of shielding means the shielding means being a gas using non-consumable electrodes

Abstract

PURPOSE:To improve the shape of bead of build up welding by specifying grain size of powder for build up welding and specifying welding speed in performing powder build up welding using a plasma torch. CONSTITUTION:In powder build up welding using a plasma torch, powder for build up welding containing more than 95% of -100 meth - +250 mesh grain size is used, and welding speed is controlled to above 4mm./sec. It is desirable to use powder for build up welding manufactured by method in which cooling speed is slower than the case of liquid spray such as gas spray, gas-water spray etc. to improve flow in supplying into plasma arc.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は、粉末を用いた肉盛溶接に適用される粉末肉
盛溶接方法に関し、例えば自動車用や船舶用のエンジン
バルブのフェース面における肉盛、その他品種の肉盛溶
接に適用される粉末肉盛溶接方法に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a powder build-up welding method applied to build-up welding using powder, and for example, to apply powder build-up welding to the face surface of engine valves for automobiles and ships. The present invention relates to a powder overlay welding method that is applied to overlay welding and other types of overlay welding.

（従来技術） 従来、例えば自動車用のエンジン／ヘルプを製作するに
際しては、そのフェース面の翻然および耐摩耗性を高め
るために肉盛り溶接を行うことか多い。(Prior Art) Conventionally, when manufacturing an engine/helper for an automobile, for example, overlay welding is often performed to improve the elasticity and wear resistance of the face surface.

この肉盛溶接においては、バルブ等の被肉盛材に対する
溶着が完全であること、肉盛溶着金属の成分が肉盛溶着
前の肉盛材成分に近いこと、肉盛溶接部のビード形状が
良好であること、肉盛君の歩留りが高いこと、なとが要
求されるが、この肉盛溶接に際して粉末を用いたプラズ
マ肉盛溶接を採用する試みも進んでいる。In this overlay welding, welding to the overlay material such as a valve must be complete, the composition of the overlay weld metal should be close to that of the overlay material before overlay welding, and the bead shape of the overlay weld should be Good quality and high yield of overlay are required, and attempts are being made to adopt plasma overlay welding using powder for this overlay welding.

この際に使用される粉末肉盛溶接用プラズマトーチとし
ては、棒状電極と前記棒状電極の囲りに配設したトーチ
内筒との間からプラズマ作動ガスを供給すると共に、前
記トーチ内筒と前記ト−チ内筒の囲りに配設したトーチ
外筒との間からプラズマアーク中に肉盛溶接用粉末を供
給する構成のものがあり、プラズマアークによって前記
肉盛溶接用粉末を溶解して被肉盛材表面に溶接肉盛する
ものがあった。In the plasma torch for powder overlay welding used in this case, plasma working gas is supplied from between a rod-shaped electrode and a torch inner cylinder arranged around the rod-shaped electrode, and the plasma working gas is supplied between the torch inner cylinder and the torch inner cylinder arranged around the rod-shaped electrode. There is a structure in which overlay welding powder is supplied into the plasma arc from between the torch outer cylinder arranged around the inner torch cylinder, and the overlay welding powder is melted by the plasma arc. There were cases where welding was applied to the surface of the material to be overlaid.

しかしながら、このような粉末肉感溶接用プラズマトー
チを用いて行う粉末肉盛溶接においては、肉盛溶接用粉
末が粉末供給装置から粉末供給ホース内を流れ、次いで
プラズマトーチの１・−チ内筒とトーチ外筒との間から
プラズマアーク中に供給される過程で、粉末のうち粒径
の大きいものの方が小さいものよりも先に進み、小さい
粉末の方が遅れる傾向にあるため、肉盛溶接用粉末の粒
度分布、溶接速度、あるいは粉末形状などが適ｕＪでな
い場合には、肉盛溶接の終了に合わせて肉盛溶接用粉末
の供給を止めたとき、第１図（ａ）に示すように、終期
に流れる肉盛溶接用粉末は粒径の小さなものが多くなっ
て粉末の切れが悪くなり、高さの低いビードが形成され
るようになって、第１図（ｂ）に示すような望ましい溶
接ビードが得られず、例えば自動車用のエンジンバルブ
のフェース面での肉盛溶接のように、リング状に溶接を
行う場合に、最初の肉盛溶接部分の」−に最後の細かな
粉末による溶融金属の肉盛が重なるため、重ね部のビー
ド形状が悪くなるという問題があった。However, in powder build-up welding performed using such a plasma torch for powder feel welding, the build-up welding powder flows from the powder supply device through the powder supply hose, and then flows into the 1-ch inner cylinder of the plasma torch. In the process of being supplied into the plasma arc from between the torch outer cylinder and the powder, larger particles tend to advance before smaller particles, and smaller particles tend to lag behind. If the particle size distribution, welding speed, or powder shape of the powder is not suitable, when the supply of overlay welding powder is stopped at the end of overlay welding, as shown in Figure 1 (a), , the overlay welding powder flowing in the final stage has many particles with small particle sizes, making it difficult to cut the powder, and forming a bead with a low height, as shown in Figure 1 (b). When a desired weld bead is not obtained and welding is carried out in a ring shape, for example when overlaying the face of an automobile engine valve, the final fine powder may be present in the initial overlay welding area. Since the overlays of molten metal overlap, there is a problem in that the bead shape at the overlapping portion deteriorates.

（発明の目的） この発明は、」二連した従来の問題点に着１」シてなさ
れたもので、粉末を用いた肉盛溶接によるビード形状が
良好であり、特に自動車用のエンジンバルブのように肉
盛溶接部がリング状をなすときでも、溶接の始め部分と
終わり部分との重なり部でのビート形状が著しく良好な
ものとすることができる粉末肉盛溶接方法を提供するこ
とを目的としている。(Objective of the Invention) This invention has been made to address the two problems of the prior art.The present invention has been made to solve the two problems of the conventional art. It is an object of the present invention to provide a powder overlay welding method that can make the beat shape at the overlapping part of the welding start and end parts extremely good even when the overlay welding part has a ring shape. It is said that

（発明の構成） この発明は、棒状電極と前記棒状電極の囲りに配設した
トーチ内筒との間からプラズマ作動ガスを供給すると共
に、前記トーチ内筒と前記１・−チ内筒の囲りに配設し
たトーチ外筒との間からプラズマアーク中に肉盛溶接用
粉末を供給する構成の粉末肉盛溶接用プラズマトーチを
用いて粉末肉盛溶接を行うに際し、前記肉盛溶接用粉末
に、−１００ｍｅｓｈ　〜＋　２５０Ｉｌｅｓｈの粒径
の粉末が９５％以」二を占めるものを使用し、溶接速度
を４ｍｍ／ｓｅｃ以」；として溶接を行うようにしたこ
とを特徴としており、肉盛溶接用粉末の供給が円滑にな
されるように、より望ましくは、肉盛溶接用粉末を、ガ
ス噴霧またはガスー水噴高により製造したものを使用す
るようにしたことを特徴としている。(Structure of the Invention) The present invention supplies plasma working gas from between a rod-shaped electrode and a torch inner cylinder disposed around the rod-shaped electrode, and also supplies a plasma working gas between the torch inner cylinder and the torch inner cylinder arranged around the rod-shaped electrode. When performing powder overlay welding using a plasma torch for powder overlay welding that is configured to supply overlay welding powder into the plasma arc from between the torch outer cylinder arranged around the It is characterized by using a powder with a particle size of -100mesh to +250Iles accounting for 95% or more, and welding at a welding speed of 4mm/sec or more. In order to smoothly supply the welding powder, more preferably, the overlay welding powder is produced by gas spraying or gas-water jetting.

第２図はこの発明の粉末肉盛溶接方法において用いる粉
末肉盛溶接用プラズマトーチの一例を示す図であって、
このプラズマトーチ１は、図示しない電源の陰極側と接
続した棒状型１ｊ２を中心に備え、この棒状電極２と同
心状に且つ間隔をおいてトーチ内筒３が配設しである。FIG. 2 is a diagram showing an example of a plasma torch for powder overlay welding used in the powder overlay welding method of the present invention,
This plasma torch 1 has a rod-shaped mold 1j2 at its center connected to the cathode side of a power source (not shown), and a torch inner cylinder 3 is disposed concentrically with the rod-shaped electrode 2 and spaced apart from it.

このトーチ内筒３は図示例の場合、その下端にチップ４
を備えていてねし止めされているが、これらを一体化し
たものであっても良い。そして、トーチ内筒３およびチ
・ンプ４内には冷却水通路５が設けであると共に、棒状
電極２とトーチ内筒３との間でプラズマ作動ガス流通路
６が形成してあり、さらにこの棒状電極２とトーチ内筒
３との間にはプラズマ作動ガス通過孔７を複数設けたプ
ラズマ作動ガス整流体８が配設しである。このプラズマ
作動ガス整流体８は、周方向に等間隔で設けた複数のプ
ラズマ作動ガス通過孔７によって、」二部から矢印方向
に供給されたプラズマ作動カスの流れを整流し、水平断
面においてプラズマ作動ガスの流れが均一化されるよう
にするはたらきをもっている。また、このプラズマ作動
ガス整流体８は、棒状電極２の保持体としてもはたらく
ものであって、棒状電極２を常に１・−チ内筒３と同心
状態に保持し、棒状電極２に片減りを生じるのを防ぐよ
うにしている。また、１・−チ内筒３の下端（図示例の
場合にはチンブ４の下端）にはプラズマアーク噴出ノズ
ル２を備えている。In the illustrated example, this torch inner cylinder 3 has a tip 4 at its lower end.
Although it is equipped with a screw and is secured with a screw, it is also possible to integrate these. A cooling water passage 5 is provided in the torch inner cylinder 3 and the chimp 4, and a plasma working gas flow passage 6 is formed between the rod-shaped electrode 2 and the torch inner cylinder 3. A plasma working gas rectifier 8 having a plurality of plasma working gas passage holes 7 is disposed between the rod-shaped electrode 2 and the torch inner cylinder 3. This plasma working gas rectifier 8 rectifies the flow of plasma working gas supplied from the second part in the direction of the arrow by means of a plurality of plasma working gas passage holes 7 provided at equal intervals in the circumferential direction. Its function is to equalize the flow of working gas. In addition, this plasma working gas rectifier 8 also functions as a holder for the rod-shaped electrode 2, and always holds the rod-shaped electrode 2 concentrically with the inner cylinder 3. We try to prevent this from occurring. Further, a plasma arc jetting nozzle 2 is provided at the lower end of the 1-ch inner cylinder 3 (in the case of the illustrated example, the lower end of the chimney 4).

さらに、トーチ内筒３の外周部には間隔をおいてトーチ
外筒１１が配設してあり、このＩ・−チ外筒１１のド端
部分にプラズマアーク噴出ノズル１２が形成しであると
共に、トーチ内筒３とトーチ外筒１１との間で粉末供給
路１３が形成してあり、図示しない粉末供給装置より粉
末送給ガスと共に供給した肉感溶接用粉末１４がプラズ
マアーク中に供給できるようになっている。また、ｌ−
−チ外筒１１のノズル部分にも冷却水通路１５が形成し
である。さらに、トーチ外筒１１の下端部分には前記プ
ラズマアーク噴出ノズル１２と同心状にガスレンズ１６
が設けてあり、シールドカス供給路１７から供給される
シールドカスがプラズマアークの周囲を濃淡なく均一に
シールドするようにしである。Furthermore, a torch outer cylinder 11 is arranged at intervals on the outer circumference of the torch inner cylinder 3, and a plasma arc jetting nozzle 12 is formed at the end of this I/-ch outer cylinder 11. A powder supply path 13 is formed between the torch inner cylinder 3 and the torch outer cylinder 11, so that the sensuous welding powder 14 supplied together with the powder supply gas from a powder supply device (not shown) can be supplied into the plasma arc. It has become. Also, l-
- A cooling water passage 15 is also formed in the nozzle portion of the outer cylinder 11. Furthermore, a gas lens 16 is provided concentrically with the plasma arc jet nozzle 12 at the lower end portion of the torch outer cylinder 11.
is provided so that the shielding dregs supplied from the shielding dregs supply path 17 uniformly shields the periphery of the plasma arc.

粉末肉盛溶接に際しては、図示しない電源の陰極側を棒
状電極２に接続すると共に、同電源の陽極側を図示しな
い被肉盛材に接続し、棒状電極２と被肉盛材との間でプ
ラズマアークを発生させると同時に、肉盛溶接用粉末１
４を粉末送給ガスによってプラズマアーク中に供給して
溶融させた状態として前記被肉盛材の表面で溶着させる
。During powder overlay welding, the cathode side of a power source (not shown) is connected to the rod-shaped electrode 2, and the anode side of the same power source is connected to the material to be overlaid (not shown), and a At the same time as generating a plasma arc, overlay welding powder 1
4 is supplied into a plasma arc using a powder supply gas, and the melted state is welded on the surface of the material to be overlaid.

このとき、棒状電極２と１・−チ内筒３との間にプラズ
マ作動ガス整流体８が設けであるため、プラズマ作動ガ
スは水平断面において濃淡のない均一なものとなってお
り、プラズマガスの集中性を高め、粉末１４の供給を水
平断面において均一化し、棒状電極２の片減りを防止し
、良好な肉盛溶接が可能となるようにしている。また、
プラズマアークおよび肉盛溶接部分はシールドガスによ
って覆われることにより外気と有効に遮断されるため、
良好な肉盛溶接層を四ることができる。At this time, since a plasma working gas rectifier 8 is provided between the rod-shaped electrode 2 and the 1-chi inner cylinder 3, the plasma working gas is uniform with no density in the horizontal cross section, and the plasma working gas is uniform. This improves the concentration of powder 14, makes the supply of powder 14 uniform in the horizontal cross section, prevents the rod-shaped electrode 2 from being worn out on one side, and makes it possible to perform good overlay welding. Also,
Plasma arc and overlay welding parts are covered with shielding gas and are effectively isolated from the outside air.
A good overlay weld layer can be formed.

なお、前記プラズマトーチの電極は、棒状をなすもので
あり、例えば、タングステン等の高融点金属（または合
金）から形成されたものが使用される。この場合、電極
の全体をタングステン等の高融点材料から形成すること
も可能であるが、プラズマアーク発生部分を上記高融点
材料から形成し、その他の部分は導電性水冷パイプなど
から形成することもできる。The electrode of the plasma torch is rod-shaped, and is made of, for example, a high melting point metal (or alloy) such as tungsten. In this case, it is possible to form the entire electrode from a high-melting point material such as tungsten, but it is also possible to form the plasma arc generation part from the above-mentioned high-melting point material and the other parts from a conductive water-cooled pipe. can.

また、肉盛溶接用粉末は、肉盛用として使用される例え
ば耐熱性合金や耐摩耗性合金、具体曲にはステライト等
のＣＯ基合金、コルモノイ等のＮｉ基合金、ＦＭＳＱの
Ｆｅ八金合金どが使用される。この場合、粉末中に粒径
の大きなものか多すぎるとプラズマアークを用いた肉盛
溶接時に溶は残りが生じるので好ましくなく、反対に粉
末中に粒径が小さなものが多すぎると粉末の飛散部が多
くなって歩留りが低下したり、小径の粉末が大径の粉末
に比べて供給遅れを生じやすいため肉盛溶接の終期にお
いて小径の粉末が切れ悪く出てきて第１図（ａ）に示す
ように低い溶接ビードか形成されて溶接ビード形状を悪
化させるという不具合を生ずる。また、溶接速度が遅す
ぎる場合にも良好な溶接ビード形状が得られなくなる。In addition, the powder for overlay welding is used for overlay, such as heat-resistant alloys and wear-resistant alloys, concrete examples include CO-based alloys such as stellite, Ni-based alloys such as colmonoy, and Fe metal alloys such as FMSQ. which is used. In this case, if there are too many large particles in the powder, welding will remain during overlay welding using a plasma arc, which is undesirable.On the other hand, if there are too many small particles in the powder, the powder will scatter. As the number of parts increases, the yield decreases, and small-diameter powder is more likely to have a supply delay than large-diameter powder, so the small-diameter powder comes out poorly at the end of overlay welding, and as shown in Figure 1 (a). As shown, a problem arises in that a low weld bead is formed and the shape of the weld bead is deteriorated. Furthermore, if the welding speed is too slow, a good weld bead shape cannot be obtained.

このような理由から、この発明においては、肉盛溶接用
粉末として、−１００ｍｅｓｈ−＋　２５０ｍｅｓｈの
粒径の粉末が９５％以上を占めるものを使用し、溶接速
度を４　ｉｎ／ｓｅｃ以上として肉盛溶接を行うように
した。For these reasons, in the present invention, powder for overlay welding is made up of 95% or more of powder with a particle size of -100mesh-+250mesh, and the welding speed is set to 4 in/sec or higher for overlay welding. I started welding.

さらに、上記肉盛溶接用粉末は、プラズマアーク中への
供給時における流れが良好であるように、ガス噴霧ある
いはカス−水噴霧等、液体噴霧の場合に比べて冷却速度
の遅い粉末製造法によって製造したものを使用するのが
より望ましい。すなわち、液体噴霧によって製造した粉
末の形状は不規則形状のものが多く、粉末の供給が円滑
になされないと同時にプラズマアークによる溶は込みが
十分でないことがあるのに対して、ガス噴霧あるいはガ
ス−水噴霧によって製造した粉末の形状は球形に近いも
のが多い比較的規則形状のものであるため、粉末の供給
が円滑になされると同時にプラズマアークによる溶は込
みが十分なものとなり、著しく良好な溶接ビード形状か
得られる。Furthermore, the powder for overlay welding is produced using a powder manufacturing method that has a slower cooling rate than liquid spraying, such as gas spraying or dregs-water spraying, so that the powder flows well when being supplied into the plasma arc. It is more desirable to use manufactured products. In other words, the shape of powder produced by liquid spraying is often irregular, making it difficult to supply the powder smoothly, and at the same time, the melt penetration by the plasma arc may not be sufficient. -The shape of the powder produced by water spraying is relatively regular, often close to spherical, so the powder is supplied smoothly and at the same time the melt penetration by the plasma arc is sufficient, resulting in extremely good results. A weld bead shape can be obtained.

この発明において使用する肉盛溶接用粉末は、上述した
条件を満たすものが望ましく、例えば特公昭５３−１１
２６９号公報や特公昭５３−２６５９１号公報に記載の
気液混合ガス噴霧によって製造したものが用いられる。The powder for overlay welding used in this invention preferably satisfies the above-mentioned conditions, for example,
Those manufactured by spraying a gas-liquid mixed gas as described in Japanese Patent Publication No. 269 and Japanese Patent Publication No. 53-26591 are used.

（実施例） 次に、この発明の実施例を比較例と共に説明する。(Example) Next, examples of the present invention will be described together with comparative examples.

第２図に示した構造の粉末肉盛溶接用プラズマト−チ１
を使用し、メイン電流１００Ａ、アーク電圧３６Ｖで行
い、次表に示す粒度分布の肉盛溶接用粉末（ステライ）
＃１２を素材としてガス噴霧により製造したもの）を同
しく次表に示す溶接速度にして、自動車用エンジンの排
気バルブ（直径５０ｍｍ）のフェース面での肉盛溶接を
行った。Plasma torch 1 for powder overlay welding with the structure shown in Fig. 2
The main current was 100 A, the arc voltage was 36 V, and overlay welding powder (Stellai) with the particle size distribution shown in the table below was used.
#12 (manufactured by gas spraying using the material) was welded at the welding speed shown in the following table to perform overlay welding on the face of an automobile engine exhaust valve (diameter 50 mm).

！例（、）１ び−□１１↓、゛ 表において、０は溶接ビード形状が著しく良好であるも
の、Ｏは良好であるもの、Δはやや良好であるもの、×
は悪いものを示している。! Example (,)1 and -□11↓,゛In the table, 0 means that the weld bead shape is extremely good, O means that it is good, Δ means that it is somewhat good, ×
indicates something bad.

表に示すように、肉盛溶接用粉末として、−１００ｍｅ
ｓｈ　〜＋２５０ｍｅｓｈの粒径の粉末が９５％以上を
占めるものを使用し、溶接速度を４ｍｍ１ｓｅｃ以上と
して粉末肉盛溶接した場合には。As shown in the table, -100me is used as powder for overlay welding.
When powder overlay welding is performed using powder with a particle size of 95% or more of sh~+250mesh and a welding speed of 4mm/sec or more.

溶接ビード形状が良好であることが確認された。It was confirmed that the weld bead shape was good.

しかし、粉末中に細かすぎる粉末が多かったり、反対に
大きすぎる粉末が多かったりする比較例の場合には、良
好な溶接ビード形状を得ることができなかった。However, in the case of the comparative example in which there were many powders that were too fine or too large, it was not possible to obtain a good weld bead shape.

（発明の効果） 以上説明してきたように、この発明によれば、棒状電極
と前記棒状電極の囲りに配設した１・−チ内筒との間か
らプラズマ作動カスを供給すると共に、前記トーチ内筒
と前記１・−チ内筒の囲りに配設したトーチ外筒との間
からプラズマアーク中に肉盛溶接用粉末を供給する構成
の粉末肉盛溶接用プラズマトーチを用いて粉末肉盛溶接
を行うに際し、前記肉盛溶接用粉末に、−１００ｍｅｓ
ｈ〜十２５０ｍｅｓｈの粒径の粉末が９５％以」二を占
めるものを使用し、溶接速度を４ｍｍ／ｓｅｃ以上とし
て溶接を行うようにしたから、粉末を用いた肉盛溶接に
よるビード形状が良好であり、特に自動車用のエンジン
バルブのフェース面での肉盛溶接の場合のように、肉盛
溶接部がリング状をなすときでも、溶接の最初の部分と
終わり部分との重ね部におけるビード形状が著しく良好
なものとなすことができるという非常に優れた効果を有
している。(Effects of the Invention) As described above, according to the present invention, plasma-activated scum is supplied from between a rod-shaped electrode and the 1-ch inner cylinder disposed around the rod-shaped electrode, and Using a plasma torch for powder build-up welding, the powder build-up welding is configured to supply powder for build-up welding into the plasma arc from between the torch inner cylinder and the torch outer cylinder arranged around the 1.-ch inner cylinder. When performing overlay welding, -100 mes is added to the overlay welding powder.
Powder with a particle size of 1250mesh (95% or more) is used, and welding is performed at a welding speed of 4mm/sec or higher, so the bead shape obtained by overlay welding using powder is good. In particular, even when the overlay weld is ring-shaped, as in the case of overlay welding on the face of an automobile engine valve, the bead shape at the overlap between the beginning and end of the weld It has a very excellent effect in that it can be made extremely good.

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

第１図（ａ）（ｂ）は溶接ビードの高さ変化を示す説明
図、第２図はこの発明において使用される粉末肉盛溶接
用プラズマト−チの縦断面図である。 １・・・粉末肉盛溶接用プラズマト−チ２・・・杯状電
極 ３・・・トーチ内筒 ６・・・プラズマ作動ガス流通路 １１・・・トーチ外筒 １３・・・肉盛溶接用粉末供給路 １４・・・肉盛溶接用粉末 特許出願人　大同特殊鋼株式会社 代理人弁理士　小　塩　豊 （？１） （ｂ）FIGS. 1(a) and 1(b) are explanatory diagrams showing changes in the height of a weld bead, and FIG. 2 is a longitudinal sectional view of a plasma torch for powder overlay welding used in the present invention. 1... Plasma torch for powder overlay welding 2... Cup-shaped electrode 3... Torch inner tube 6... Plasma working gas flow passage 11... Torch outer tube 13... Overlay welding Powder supply channel 14... Patent applicant for powder for overlay welding Daido Steel Co., Ltd. Representative patent attorney Yutaka Oshio (?1) (b)

Claims (3)

【特許請求の範囲】[Claims] （１）棒状電極と前記棒状電極の囲りにＡ！設したトー
チ内筒との間からプラズマ作動ガスを供給すると共に、
前記ｌ・−チ内筒と前記）・−チ内筒の囲りに配設した
トーチ外筒との間からプラスマアーク中に肉身溶接用粉
末を供給する構成の粉末肉盛溶接用プラズマ作動ガスを
用いて粉末肉盛溶接をｆ−ｉうに際し、　Ｍｉｊ記肉盛
溶接用粉末に、−１００ｍｅｓｈ〜＋２５０　ｍｅｓｈ
の粒径の粉末が９５％以にを占めるものを使用し、溶接
速度を４ｍｍ／ｓｅｃ以１−とじて溶接を行うことを特
徴とする粉末肉盛溶接方法。(1) A rod-shaped electrode and A! around the rod-shaped electrode! In addition to supplying plasma working gas from between the installed torch inner cylinder,
Plasma working gas for powder overlay welding, configured to supply powder for flesh welding into the plasma arc from between the above-mentioned l. When performing powder overlay welding using Mij, -100 mesh to +250 mesh is applied to the powder for overlay welding.
1. A powder overlay welding method, characterized in that 95% or more of the powder has a particle size of （２）肉盛溶接用粉末は、カス噴霧により製造されたも
のである特許請求の範囲ａｉ（１）項記載の粉末肉盛溶
接方法。(2) The powder build-up welding method according to claim ai (1), wherein the powder for build-up welding is produced by dregs spraying. （３）肉盛溶接用粉末は、ガス−水噴霧により製造され
たものである特許請求の範囲第（１）項記載の粉末肉盛
溶接方法。(3) The powder build-up welding method according to claim (1), wherein the powder for build-up welding is produced by gas-water spraying.
JP20057683A 1983-10-26 1983-10-26 Powder build up welding Pending JPS6092079A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP20057683A JPS6092079A (en) 1983-10-26 1983-10-26 Powder build up welding
DE19843438439 DE3438439A1 (en) 1983-10-26 1984-10-19 POWDER SURFACE WELDING PROCESS
GB08426689A GB2148768B (en) 1983-10-26 1984-10-22 Powder surface welding method
US06/663,929 US4621183A (en) 1983-10-26 1984-10-23 Powder surface welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20057683A JPS6092079A (en) 1983-10-26 1983-10-26 Powder build up welding

Publications (1)

Publication Number Publication Date
JPS6092079A true JPS6092079A (en) 1985-05-23

Family

ID=16426629

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20057683A Pending JPS6092079A (en) 1983-10-26 1983-10-26 Powder build up welding

Country Status (1)

Country Link
JP (1) JPS6092079A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017519111A (en) * 2014-05-31 2017-07-13 エレメント、シックス、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツングＥｌｅｍｅｎｔ Ｓｉｘ Ｇｍｂｈ Thermal spray assembly and method using thermal spray assembly
JP2017526521A (en) * 2014-05-31 2017-09-14 エレメント、シックス、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツングＥｌｅｍｅｎｔ Ｓｉｘ Ｇｍｂｈ Thermal spray assembly and method using thermal spray assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4830541A (en) * 1971-08-20 1973-04-21
JPS4952748A (en) * 1972-09-22 1974-05-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4830541A (en) * 1971-08-20 1973-04-21
JPS4952748A (en) * 1972-09-22 1974-05-22

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017519111A (en) * 2014-05-31 2017-07-13 エレメント、シックス、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツングＥｌｅｍｅｎｔ Ｓｉｘ Ｇｍｂｈ Thermal spray assembly and method using thermal spray assembly
JP2017526521A (en) * 2014-05-31 2017-09-14 エレメント、シックス、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツングＥｌｅｍｅｎｔ Ｓｉｘ Ｇｍｂｈ Thermal spray assembly and method using thermal spray assembly

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