JPH1143706A - Method for repairing metallic part - Google Patents
Method for repairing metallic partInfo
- Publication number
- JPH1143706A JPH1143706A JP21245697A JP21245697A JPH1143706A JP H1143706 A JPH1143706 A JP H1143706A JP 21245697 A JP21245697 A JP 21245697A JP 21245697 A JP21245697 A JP 21245697A JP H1143706 A JPH1143706 A JP H1143706A
- Authority
- JP
- Japan
- Prior art keywords
- brazing material
- metal
- alloy powder
- powder
- filler metal
- 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
Links
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ジェットエンジン
等を構成する金属部品に生じたクラック等の欠陥を補修
する際に用いられる金属部品の補修方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a metal part used for repairing a defect such as a crack generated in a metal part constituting a jet engine or the like.
【０００２】[0002]
【従来の技術】航空機用ジェットエンジンでは、ニッケ
ル，コバルト，チタン，アルミニウム等を母材とした合
金による金属部品が用いられているが、このような金属
部品では、オーバーホールの際にクラック等の欠陥が発
見されると補修が行われる。2. Description of the Related Art In aircraft jet engines, metal parts made of alloys based on nickel, cobalt, titanium, aluminum or the like are used. However, such metal parts have defects such as cracks during overhaul. If found, repairs will be made.
【０００３】このような金属部品の補修方法として、近
時、欠陥部に合金粉末を充填して真空炉内で焼結固化さ
せた後、当該部位の上にロウ材を被覆し、溶融させて合
金粉末団塊を結合して欠陥部を埋めるものがある。As a method of repairing such a metal part, recently, a defective portion is filled with an alloy powder and solidified and sintered in a vacuum furnace, and then a brazing material is coated on the portion and melted. In some cases, alloy powder nodules are combined to fill the defect.
【０００４】[0004]
【発明が解決しようとする課題】ところが、この方法で
は真空炉内での処理が二段階となり、補修に時間を要
し、従ってコストも高くなるという問題があった。However, this method has a problem that the treatment in the vacuum furnace is performed in two stages, which requires a long time for the repair, and therefore increases the cost.
【０００５】このため、本出願人は先に、欠陥部を削り
取って形成した凹部内に合金粉末を充填すると共にこの
合金粉末の表面にロウ材粉末を被覆し、真空炉内で所定
温度に加熱して合金粉末を団塊状に焼結し、次いで、温
度を変えて（上昇させて）ロウ材を溶融させて団塊間に
浸透させ、合金粉末団塊を結合させて凹部を埋める方法
を提案した。（特願平８−２６３２９０号）しかしなが
ら、この方法では、合金粉末の上面に被覆したロウ材の
合金粉末団塊間への浸透が安定せず、このため、合金粉
末の団塊を十分な強度で結合できない虞を有するもので
あった。[0005] For this reason, the present applicant first fills a recess formed by shaving a defective portion with an alloy powder, coats the surface of the alloy powder with a brazing material powder, and heats the alloy powder to a predetermined temperature in a vacuum furnace. Then, a method was proposed in which the alloy powder was sintered into a nodule shape, and then the temperature was changed (increased) to melt the brazing material and infiltrate between the nodules, thereby bonding the alloy powder nodules to fill the recesses. However, in this method, the brazing material coated on the upper surface of the alloy powder does not stably penetrate into the space between the alloy powder lumps, so that the alloy powder lumps are bonded with sufficient strength. There was a possibility that it could not be done.
【０００６】本発明は、上記解決課題に鑑みてなされた
ものであって、ロウ材を合金粉末の団塊間へ安定して確
実に浸透させることができ、合金粉末の団塊を十分な強
度で結合できる金属部品の補修方法を提供することを目
的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to stably and surely infiltrate a brazing material between the nodules of an alloy powder and to bond the nodules of the alloy powder with sufficient strength. It is an object of the present invention to provide a method for repairing a metal part that can be performed.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成する本発
明に係る金属部品の補修方法は、金属部品の欠陥部位を
取り除いて凹部を形成すると共に、該凹部内に、底部に
所定厚さのロウ材層又はロウ材と金属粉末のロウ材混合
物層を形成して金属粉末を充填し、更にその上面にロウ
材を被覆して被覆ロウ材層を形成した後、真空炉内で加
熱して前記金属粉末を焼結して団塊状とする焼結工程と
前記ロウ材を溶融させて前記金属粉末団塊の隙間に浸透
させて結合させる結合工程を連続して行い、前記凹部を
周囲と一体化して埋めることを特徴とする。According to the present invention, there is provided a method of repairing a metal part, the method comprising the steps of: forming a concave portion by removing a defective portion of the metal part; After forming a brazing material layer or a brazing material mixture layer of a brazing material and a metal powder, filling the metal powder, further covering the upper surface with a brazing material to form a coated brazing material layer, and then heating in a vacuum furnace. A sintering step of sintering the metal powder to form a nodule and a bonding step of melting the brazing material and permeating and bonding the gaps of the metal powder nodule are performed, and the concave portion is integrated with the surroundings. It is characterized by filling.
【０００８】[0008]
【発明の実施の形態】以下、添付図面を参照して本発明
の実施の形態について説明する。図１（Ａ）〜（Ｆ）
は、本発明に係る金属部品の補修方法の一例の工程を順
次示し、図１（Ａ）に示す金属又は金属合金によって形
成された補修対象部品としての金属部品１０の欠陥部位
としてのクラック１１を、ロウ材を用いて補修するもの
である。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 (A) to (F)
FIG. 1A sequentially shows steps of an example of a method for repairing a metal part according to the present invention, and shows a crack 11 as a defective part of a metal part 10 as a part to be repaired formed of a metal or a metal alloy shown in FIG. And repair using brazing material.
【０００９】金属部品１０は、例えば、ニッケルを母材
としてクロム，鉄，その他を適量含む合金によって形成
される。ロウ材は、例えば金属部品１０と同一組成に珪
素又は硼素を０．５〜２重量％を含むものである。The metal component 10 is formed of, for example, an alloy containing nickel as a base material and containing chromium, iron, and other appropriate amounts. The brazing material contains, for example, 0.5 to 2% by weight of silicon or boron in the same composition as the metal component 10.
【００１０】まず、図１（Ｂ）に示すように、クラック
１１の周囲をドリルやカッターによって切削又はグライ
ンダー等によって研削し、クラック１１を完全に除去し
て凹部１２を形成する。First, as shown in FIG. 1B, the periphery of the crack 11 is cut by a drill or a cutter or ground by a grinder or the like, and the crack 11 is completely removed to form a concave portion 12.
【００１１】このようにして形成した凹部１２の底部
に、ロウ材粉末を所定の厚さに敷き詰め、次いで、凹部
１２内に金属部品１０と同一組成の合金粉末を充填し、
更にその上にロウ材粉末を被せるように載せる。これに
より、図１（Ｃ）に示すように、凹部１２内に下ロウ材
層２１と合金粉末層２２が形成されると共に、その上側
に被覆ロウ材層２３が盛り上げられた状態となる。尚、
下ロウ材層２１は、合金粉末との混合物によって形成し
てロウ材混合物層としても良い。また、その量は、凹部
１２の５〜１０％程度（容積比）が適当である。更に、
必要に応じて被覆ロウ材層２３の上面をブレースセメン
ト等による固定処理を施す。The bottom of the recess 12 thus formed is laid with a predetermined thickness of the brazing material powder, and then the recess 12 is filled with an alloy powder having the same composition as the metal component 10.
Further, a brazing filler metal powder is placed thereon. As a result, as shown in FIG. 1C, the lower brazing material layer 21 and the alloy powder layer 22 are formed in the recess 12 and the covering brazing material layer 23 is raised above the lower brazing material layer 21 and the alloy powder layer 22. still,
The lower brazing material layer 21 may be formed of a mixture with an alloy powder to form a brazing material mixture layer. It is appropriate that the amount is about 5 to 10% (volume ratio) of the recess 12. Furthermore,
If necessary, the upper surface of the coating brazing material layer 23 is subjected to a fixing treatment with brace cement or the like.
【００１２】このように、凹部１２内に下ロウ材層２１
と合金粉末層２２が形成されると共にその上側に上ロウ
材層２３が盛り上げられた状態の金属部品１０を真空炉
中に挿置し、真空雰囲気中で図２に示す時間−温度スケ
ジュールで加熱して焼結及び結合（液相結合，拡散結
合）の各工程を連続して行う。As described above, the lower brazing material layer 21 is formed in the recess 12.
The metal part 10 with the alloy powder layer 22 formed thereon and the upper brazing material layer 23 raised thereon is placed in a vacuum furnace and heated in a vacuum atmosphere according to the time-temperature schedule shown in FIG. Then, the respective steps of sintering and bonding (liquid phase bonding, diffusion bonding) are continuously performed.
【００１３】即ち、焼結温度：Ｔ１まで加熱して所定時
間：ｔ１保持する。これによって図１（Ｄ）に示すよう
に合金粉末層２２を形成する合金粉末が団塊状に焼結し
てその内部に緻密化した部分を有する合金団塊２２Ａが
形成される。（焼結工程）次いで、ロウ材の融点以上の
温度：Ｔ２まで上昇させて時間：ｔ２保持する。これに
よって上下ロウ材層２１，２３のロウ材が溶融して合金
団塊２２Ａの間に浸透し、図１（Ｅ）に示すように合金
団塊２２Ａを液相のロウ材によって結合した液相結合状
態となる。この時、ロウ材は合金団塊２２Ａの上下両側
に配置されている（下ロウ材層２１，被覆ロウ材層２
３）ため、合金団塊２２Ａの間へ容易且つ確実に浸透
し、合金団塊２２Ａを結合することができる。（液相結
合工程）その後、温度を拡散温度：Ｔ３として時間：ｔ
３保持する。これにより、金属部品１０の凹部１２の内
壁面とロウ材の間，及び合金団塊２２Ａとロウ材との間
で構成原子の相互拡散が生じ、金属部品１０と合金団塊
２２Ａとロウ材が一体に結合され、図１（Ｆ）に示すよ
うに凹部１２が金属部品１０と一体に埋められた状態と
なる。（拡散結合工程）そして、アルゴンガス等の不活
性ガスによる対流冷却及び自然冷却等によって常温まで
徐冷した後、真空炉から取り出して表面の不要部分を切
削又は研磨等によって削除して表面を仕上げることによ
り、補修が完了する。That is, the sintering temperature is heated up to T1 and maintained for a predetermined time: t1. As a result, as shown in FIG. 1 (D), the alloy powder forming the alloy powder layer 22 is sintered in a nodular form to form an alloy nodule 22A having a densified portion therein. (Sintering step) Next, the temperature is raised to the temperature equal to or higher than the melting point of the brazing material: T2, and the time is maintained at t2. As a result, the brazing material of the upper and lower brazing material layers 21 and 23 melts and penetrates between the alloy nodules 22A, and the liquid phase bonding state in which the alloy nodules 22A are joined by the liquid phase brazing material as shown in FIG. Becomes At this time, the brazing material is arranged on both upper and lower sides of the alloy nodule 22A (the lower brazing material layer 21, the covering brazing material layer 2).
3) Therefore, it can easily and reliably penetrate into the space between the alloy nodules 22A, and can bond the alloy nodules 22A. (Liquid phase bonding step) Thereafter, the temperature is set as the diffusion temperature: T3 and the time: t
Hold 3 Thereby, mutual diffusion of constituent atoms occurs between the inner wall surface of the concave portion 12 of the metal component 10 and the brazing material and between the alloy nodule 22A and the brazing material, and the metal component 10, the alloy nodule 22A and the brazing material are integrated. As shown in FIG. 1F, the concave portion 12 is buried integrally with the metal component 10 as shown in FIG. (Diffusion bonding step) Then, after gradual cooling to room temperature by convective cooling with an inert gas such as argon gas and natural cooling, take out of the vacuum furnace and remove unnecessary portions of the surface by cutting or polishing to finish the surface. This completes the repair.
【００１４】[0014]
【発明の効果】以上述べたように、本発明に係る金属部
品の補修方法によれば、金属部品の欠陥部位を取り除い
て形成した凹部内に、底部に所定厚さのロウ材層を形成
して金属粉末を充填し、更にその上面にロウ材を被覆し
た後、真空炉内で加熱して金属粉末を焼結して団塊状と
する焼結工程とロウ材を溶融させて団塊の隙間に浸透さ
せて結合させる結合工程を連続して行って凹部を周囲と
一体化して埋めることにより、金属粉末の団塊の間に上
下から溶融したロウ材が容易且つ確実に浸透し、ロウ材
によって金属団塊を十分な結合強度で結合することがで
きる。As described above, according to the method for repairing a metal part according to the present invention, a brazing material layer having a predetermined thickness is formed at the bottom in a recess formed by removing a defective part of the metal part. After filling the metal powder and further coating the brazing material on the upper surface, it is heated in a vacuum furnace to sinter the metal powder to form a nodular shape. By continuously performing the bonding step of infiltrating and bonding, the recesses are integrated with the surroundings and filled, so that the brazing material melted from above and below between the nodules of the metal powder easily and reliably penetrates, and Can be bonded with a sufficient bonding strength.
【００１５】また、金属粉末の焼結工程とロウ材による
結合工程を連続して行うために、短時間で合理的な作業
が可能となり、補修コストの低減に寄与するものであ
る。Further, since the sintering step of the metal powder and the joining step with the brazing material are performed continuously, a reasonable operation can be performed in a short time, which contributes to a reduction in repair cost.
【図１】（Ａ）〜（Ｆ）は本発明の補修工程の一例を説
明する図である。FIGS. 1A to 1F are diagrams illustrating an example of a repair process according to the present invention.
【図２】本発明の補修工程の一例における加熱処理の時
間−温度スケジュールを示す図である。FIG. 2 is a diagram showing a time-temperature schedule of a heat treatment in an example of a repair process of the present invention.
１０ 金属部品 １１ クラック（欠陥部位） １２ 凹部 ２１ 下ロウ材層（ロウ材層） ２２ 合金粉末層（金属粉末） ２２Ａ 合金団塊（金属粉末団塊） ２３ 被覆ロウ材層 DESCRIPTION OF SYMBOLS 10 Metal part 11 Crack (defect part) 12 Concave part 21 Lower brazing material layer (brazing material layer) 22 Alloy powder layer (metal powder) 22A Alloy nodule (metal powder nodule) 23 Coating brazing material layer
Claims (2)
形成すると共に、該凹部内に、底部に所定厚さのロウ材
層を形成して金属粉末を充填し、更にその上面にロウ材
を被覆して被覆ロウ材層を形成した後、真空炉内で加熱
して前記金属粉末を焼結して団塊状とする焼結工程と前
記ロウ材を溶融させて前記金属粉末団塊の隙間に浸透さ
せて結合させる結合工程を連続して行い、前記凹部を周
囲と一体化して埋めることを特徴とする金属部品の補修
方法。1. A concave portion is formed by removing a defective portion of a metal part, a brazing material layer having a predetermined thickness is formed in a bottom portion in the concave portion, and a metal powder is filled, and a brazing material is further formed on an upper surface thereof. After coating to form a coated brazing material layer, heating is performed in a vacuum furnace to sinter the metal powder to form a nodule, and the brazing material is melted and penetrated into the gaps of the nodule. A method of repairing a metal part, wherein a joining step of joining the parts is performed continuously, and the recesses are integrated with the surroundings and filled.
形成すると共に、該凹部内に、底部にロウ材と金属粉末
の混合物による所定厚さのロウ材混合物層を形成して金
属粉末を充填し、更にその上面にロウ材を被覆して被覆
ロウ材層を形成した後、真空炉内で加熱して前記金属粉
末を焼結して団塊状とする焼結工程と前記ロウ材を溶融
させて前記金属粉末団塊の隙間に浸透させて結合させる
結合工程を連続して行い、前記凹部を周囲と一体化して
埋めることを特徴とする金属部品の補修方法。2. A concave portion is formed by removing a defective portion of a metal part, and a metal filler layer having a predetermined thickness formed of a mixture of a metal and a metal powder is formed in a bottom portion of the concave portion to fill the metal powder. After further coating the brazing material on the upper surface to form a coated brazing material layer, heating in a vacuum furnace and sintering the metal powder to form a nodular shape and melting the brazing material The method of repairing a metal component according to claim 1, further comprising: continuously performing a bonding step of infiltrating and bonding the gaps of the metal powder nodules to integrate the recesses with the surroundings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21245697A JPH1143706A (en) | 1997-07-23 | 1997-07-23 | Method for repairing metallic part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21245697A JPH1143706A (en) | 1997-07-23 | 1997-07-23 | Method for repairing metallic part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1143706A true JPH1143706A (en) | 1999-02-16 |
Family
ID=16622936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21245697A Pending JPH1143706A (en) | 1997-07-23 | 1997-07-23 | Method for repairing metallic part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1143706A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110033728A1 (en) * | 2009-08-04 | 2011-02-10 | United States of America as represented by the Administrator of the National Aeronautics and | Method and System for Repairing Cracks in Structures |
| US8042723B2 (en) | 2007-10-15 | 2011-10-25 | Mitsubishi Heavy Industries, Ltd | Method of repair |
| CN102925889A (en) * | 2012-10-12 | 2013-02-13 | 秦皇岛格瑞得节能技术服务有限公司 | Plasma arc cladding repairing method of coupling half inner bore |
| JP2014513207A (en) * | 2011-03-07 | 2014-05-29 | スネクマ | Process of local repair of damaged thermomechanical parts and parts repaired according to the process, in particular turbine parts |
-
1997
- 1997-07-23 JP JP21245697A patent/JPH1143706A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8042723B2 (en) | 2007-10-15 | 2011-10-25 | Mitsubishi Heavy Industries, Ltd | Method of repair |
| US20110033728A1 (en) * | 2009-08-04 | 2011-02-10 | United States of America as represented by the Administrator of the National Aeronautics and | Method and System for Repairing Cracks in Structures |
| US8347479B2 (en) * | 2009-08-04 | 2013-01-08 | The United States Of America As Represented By The United States National Aeronautics And Space Administration | Method for repairing cracks in structures |
| US8679642B2 (en) * | 2009-08-04 | 2014-03-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | System for repairing cracks in structures |
| JP2014513207A (en) * | 2011-03-07 | 2014-05-29 | スネクマ | Process of local repair of damaged thermomechanical parts and parts repaired according to the process, in particular turbine parts |
| CN102925889A (en) * | 2012-10-12 | 2013-02-13 | 秦皇岛格瑞得节能技术服务有限公司 | Plasma arc cladding repairing method of coupling half inner bore |
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