JP2982355B2 - Surface treatment method for metal materials - Google Patents
Surface treatment method for metal materialsInfo
- Publication number
- JP2982355B2 JP2982355B2 JP3084641A JP8464191A JP2982355B2 JP 2982355 B2 JP2982355 B2 JP 2982355B2 JP 3084641 A JP3084641 A JP 3084641A JP 8464191 A JP8464191 A JP 8464191A JP 2982355 B2 JP2982355 B2 JP 2982355B2
- Authority
- JP
- Japan
- Prior art keywords
- metal
- base material
- metal base
- coating layer
- coated
- 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 - Fee Related
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- Laser Beam Processing (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属材料の表面処理方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a surface of a metal material.
【０００２】[0002]
【従来の技術】近年、科学技術の発達に伴い、現在開発
されているもの以上に高機能な金属材料が要求されてい
る。2. Description of the Related Art In recent years, with the development of science and technology, there has been a demand for metal materials having higher functions than those currently being developed.
【０００３】例えば、ボイラを圧力容器の内部に収納し
て高圧下でボイラを運転させる加圧流動床ボイラなどを
実現するためには、安価で高温腐食に強い金属材料を開
発することが不可欠とされている。For example, in order to realize a pressurized fluidized bed boiler in which a boiler is housed in a pressure vessel and the boiler is operated under high pressure, it is essential to develop a metal material which is inexpensive and resistant to high-temperature corrosion. Have been.
【０００４】安価で高温腐食に強い金属材料を得ようと
した場合、安価な金属母材の表面を高温腐食に強い金属
材料で被覆することが一般的であるが、このような被覆
方法の例として従来、不活性ガス雰囲気において安価な
金属母材を高温腐食に強い金属材料の粉末中に入れ高温
で長時間置くことにより安価な金属母材の表面に高温腐
食に強い金属材料を浸透させるという拡散浸透法や、安
価な金属母材の表面に高温腐食に強い金属材料の粒子を
たたき付けることにより安価な金属母材の表面に高温腐
食に強い金属材料の層を形成させるという溶射法などが
ある。When an inexpensive metal material resistant to high-temperature corrosion is to be obtained, the surface of an inexpensive metal base material is generally coated with a metal material resistant to high-temperature corrosion. Conventionally, by placing an inexpensive metal base material in a powder of a metal material resistant to high-temperature corrosion in an inert gas atmosphere and placing it at a high temperature for a long time, the metal material resistant to high-temperature corrosion permeates the surface of the cheap metal base material. The diffusion infiltration method and the thermal spraying method of forming a layer of a metal material resistant to high-temperature corrosion on the surface of an inexpensive metal base material by hitting particles of the metal material resistant to high-temperature corrosion on the surface of an inexpensive metal base material are known. is there.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の金属材料の表面処理方法には、以下のような問題が
あった。However, the above-mentioned conventional surface treatment method for a metal material has the following problems.
【０００６】即ち、拡散浸透法では、安価な金属母材及
び高温腐食に強い金属材料が高温に長時間さらされるた
め、安価な金属母材及び高温腐食に強い金属材料の組織
が変質して劣化し、期待どうりの高温腐食に強い材料が
得られないという問題があり、又、溶射法では、安価な
金属母材の表面に形成される高温腐食に強い金属材料の
層が多孔質となり、しかも、高温腐食に強い金属材料の
層の安価な金属母材に対する密着性が悪くて剥がれ易い
ため、やはり期待どうりの高温腐食に強い材料が得られ
ないという問題があり、上記以外の従来行われている被
覆方法にしてもそれぞれ何等かの問題があって加圧流動
床ボイラに適用可能な程度の安価で高温腐食に強い金属
材料は実現されていなかった。That is, in the diffusion infiltration method, an inexpensive metal base material and a metal material resistant to high-temperature corrosion are exposed to a high temperature for a long time. However, there is a problem that a material resistant to high-temperature corrosion as expected cannot be obtained, and in the thermal spraying method, a layer of a metal material resistant to high-temperature corrosion formed on the surface of an inexpensive metal base material becomes porous, In addition, since the layer of the metal material resistant to high-temperature corrosion has poor adhesion to the inexpensive metal base material and easily peels off, there is still a problem that a material resistant to high-temperature corrosion cannot be obtained as expected. Even with the coating methods described above, there are some problems, respectively, and a metal material which is inexpensive enough to be applied to a pressurized fluidized-bed boiler and resistant to high-temperature corrosion has not been realized.
【０００７】本発明は、上述の実情に鑑み、安価で高温
腐食に強い金属材料を含めそれ以外にもより高機能な金
属材料を得ることができる金属材料の表面処理方法を提
供することを目的とするものである。The present invention has been made in view of the above circumstances, and has as its object to provide a surface treatment method for a metal material that can obtain a metal material that is inexpensive and resistant to high-temperature corrosion and that has a higher performance in addition thereto. It is assumed that.
【０００８】[0008]
【課題を解決するための手段】本発明は、金属母材の表
面に被覆しようとする金属を配置し、次に、被覆しよう
とする金属に金属母材の表面側からレーザーを照射し
て、被覆しようとする金属を溶融することにより、金属
母材の表面に被覆しようとする金属の被覆層を形成する
と共に、金属母材と被覆層との間に両者の組織が部分的
に入り混じって境界層を形成し、更に、少なくとも被覆
層から金属母材の表面までの部分を加熱して被覆層から
金属母材の表面までの部分に圧力を加えることにより、
被覆層表面を平滑化すると共に、前記境界層及びその近
傍における金属母材の組織と被覆層の組織とを相互に拡
散させて両者の分布が金属母材側から被覆層側へかけて
連続的な変化を示す境界層のない傾斜機能部を形成する
ことを特徴とする金属材料の表面処理方法にかかるもの
である。According to the present invention, a metal to be coated is disposed on the surface of a metal base material, and then the metal to be coated is irradiated with a laser from the surface side of the metal base material. By melting the metal to be coated, a coating layer of the metal to be coated is formed on the surface of the metal base material, and the structures of both partially enter and mix between the metal base material and the coating layer. Forming a boundary layer, and further heating at least a portion from the coating layer to the surface of the metal base material to apply pressure to a portion from the coating layer to the surface of the metal base material,
While smoothing the surface of the coating layer, the structure of the metal base material and the structure of the coating layer in and around the boundary layer are mutually diffused, so that the distribution of both is continuous from the metal base material side to the coating layer side. The present invention relates to a method for treating a surface of a metal material, characterized by forming a gradient function portion without a boundary layer showing a significant change.
【０００９】[0009]
【作用】本発明によれば、金属母材の表面に被覆しよう
とする金属を配置し、次に、被覆しようとする金属に金
属母材の表面側からレーザーを照射して、被覆しようと
する金属を溶融することにより、金属母材の表面に被覆
しようとする金属の被覆層が形成されると共に、金属母
材と被覆層との間に両者の組織が部分的に入り混じった
境界層が形成される。According to the present invention, the metal to be coated is arranged on the surface of the metal base material, and then the metal to be coated is irradiated with laser from the surface side of the metal base material to cover the metal. By melting the metal, a coating layer of the metal to be coated on the surface of the metal base material is formed, and a boundary layer in which both structures are partially mixed between the metal base material and the coating layer is formed. It is formed.
【００１０】更に、少なくとも被覆層から金属母材の表
面までの部分を加熱して被覆層から金属母材の表面まで
の部分に圧力を加えることにより、被覆層表面が平滑化
されると共に、前記境界層及びその近傍における金属母
材の組織と被覆層の組織とが相互に拡散されて両者の分
布が金属母材側から被覆層側へかけて連続的な変化を示
す境界層のない傾斜機能部が形成される。Further, by heating at least the portion from the coating layer to the surface of the metal base material and applying pressure to the portion from the coating layer to the surface of the metal base material, the surface of the coating layer is smoothed and Boundary layer-free gradient function in which the structure of the metal base material and the structure of the coating layer in and around the boundary layer are mutually diffused and their distribution changes continuously from the metal base material side to the coating layer side A part is formed.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面を参照しつつ説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１〜図７は、本発明の第一の実施例であ
り、高温腐食に強い金属材料を得る場合を示したもので
ある。FIGS. 1 to 7 show a first embodiment of the present invention, in which a metal material resistant to high-temperature corrosion is obtained.
【００１３】図１中１は例えば安価な炭素鋼からなるパ
イプ状をした金属母材、２は金属母材１の送り方向１０
上流側に配設され、金属母材１の表面に被覆しようとす
る金属３、例えば、Ｃｒ−Ｍｏ−Ａｌ合金や高Ｃｒ−Ｎ
ｉ合金などの高温腐食に強い金属の粉末を塗付するため
のメタルスプレー装置、４はメタルスプレー装置２より
も金属母材１の送り方向１０下流側に設けられたレーザ
ー照射装置、５はレーザー照射装置４よりも金属母材１
の送り方向１０下流側に設けられた電気炉、６は電気炉
５よりも金属母材１の送り方向１０下流側に設けられた
抜き型である。In FIG. 1, reference numeral 1 denotes a pipe-shaped metal base material made of, for example, inexpensive carbon steel, and 2 denotes a feed direction 10 of the metal base material 1.
A metal 3 disposed on the upstream side and intended to coat the surface of the metal base material 1, for example, a Cr-Mo-Al alloy or a high Cr-N
a metal spray device for applying a metal powder resistant to high-temperature corrosion such as i-alloy; 4, a laser irradiation device provided on the downstream side of the metal spray device 2 in the feed direction 10 of the metal base material 1; Metal base material 1 rather than irradiation device 4
The electric furnace 6 provided on the downstream side in the feed direction 10 is a punching die provided on the downstream side in the feed direction 10 of the metal base material 1 than the electric furnace 5.
【００１４】図４中７は被覆しようとする金属３が溶融
され緻密化されてなる被覆層、８は金属母材１と被覆層
７との間に形成される境界層である。In FIG. 4, reference numeral 7 denotes a coating layer formed by melting and densifying the metal 3 to be coated, and reference numeral 8 denotes a boundary layer formed between the metal base material 1 and the coating layer 7.
【００１５】図６中９は図４における境界層８及びその
近傍において金属母材１の組織と被覆層７の組織とが相
互に拡散されてなる傾斜機能部である。In FIG. 6, reference numeral 9 designates a gradient function part in which the structure of the metal base material 1 and the structure of the coating layer 7 are mutually diffused in and around the boundary layer 8 in FIG.
【００１６】先ず、安価な炭素鋼からなるパイプ状をし
た金属母材１を回転しつつ送り方向１０へ送り、メタル
スプレー装置２を用いて、金属母材１の表面へ向けＣｒ
−Ｍｏ−Ａｌ合金や高Ｃｒ−Ｎｉ合金などの高温腐食に
強い金属などの粉末を塗付することにより、金属母材１
の表面に被覆しようとする金属３を配置する。First, a pipe-shaped metal base material 1 made of inexpensive carbon steel is fed in the feed direction 10 while rotating, and is then directed toward the surface of the metal base material 1 using a metal spray device 2.
By applying a powder of a metal resistant to high temperature corrosion, such as a Mo-Al alloy or a high Cr-Ni alloy,
The metal 3 to be coated is arranged on the surface of.
【００１７】この時、金属母材１と金属母材１の表面に
配置された被覆しようとする金属３とは、図２・図３に
示すように、両者の組織が完全に分離された状態となっ
ている。At this time, the metal base material 1 and the metal 3 to be coated disposed on the surface of the metal base material 1 are in a state where their structures are completely separated as shown in FIGS. It has become.
【００１８】次に、回転しつつ送られている金属母材１
に対し、レーザー照射装置４を用いて金属母材１の表面
側から被覆しようとする金属３へレーザーを照射する。Next, the metal base material 1 being fed while rotating.
Then, a laser is applied to the metal 3 to be coated from the surface side of the metal base material 1 using the laser irradiation device 4.
【００１９】すると、被覆しようとする金属３はレーザ
ーによって溶融され、金属母材１の表面に、図４・図５
で示すような、被覆しようとする金属３が溶融されて緻
密化した被覆層７が形成され、且つ、金属母材１と被覆
層７との間に両者の組織が部分的に入り混じって組織の
急激な変化がみられる境界層８が形成される。Then, the metal 3 to be coated is melted by a laser, and is applied to the surface of the metal base material 1 as shown in FIGS.
The metal 3 to be coated is melted to form a densified coating layer 7 as shown in FIG. 1, and the texture of the metal 3 is partially mixed between the metal base material 1 and the coating layer 7. The boundary layer 8 in which the rapid change of the boundary is observed is formed.
【００２０】被覆しようとする金属３にレーザーを照射
した段階では、金属母材１と被覆層７との間に組織が急
激に変化する境界層８が存在しているので、境界層８の
部分から金属母材１と被覆層７とが剥がれ易く、又、レ
ーザーを照射した際に被覆層７の表面にレーザーの走査
による筋状の凹凸が生じているので凹部から腐食が生じ
易い状態となっている。At the stage where the metal 3 to be coated is irradiated with the laser, there is a boundary layer 8 whose structure rapidly changes between the metal base material 1 and the coating layer 7. The metal base material 1 and the coating layer 7 are easily peeled off from each other, and when laser is irradiated, the surface of the coating layer 7 has streaky irregularities due to laser scanning, so that corrosion is likely to occur from the concave portions. ing.
【００２１】そこで更に、表面に被覆層７が形成された
金属母材１を電気炉５へ導いて、電気炉５で被覆層７及
び境界層８並びに金属母材１を加熱し、加熱された被覆
層７及び境界層８並びに金属母材１を抜き型６へ通して
引抜くことにより、被覆層７及び境界層８並びに金属母
材１表面に物理的な圧力を加える。Then, the metal base material 1 having the coating layer 7 formed on the surface was further led to an electric furnace 5, and the coating layer 7, the boundary layer 8, and the metal base material 1 were heated by the electric furnace 5 and heated. The coating layer 7, the boundary layer 8, and the metal base material 1 are drawn through the die 6, thereby applying physical pressure to the surface of the coating layer 7, the boundary layer 8, and the metal base material 1.
【００２２】すると、図６・図７に示すように、被覆層
７の表面のレーザーの走査による筋状の凹凸が平滑化さ
れ、且つ、前記境界層８及びその近傍における金属母材
１の組織と被覆層７の組織とが相互に拡散されて、両者
の分布が金属母材１側から被覆層７側へかけて連続的な
変化を示す境界層８のない、いわゆる傾斜機能部９が形
成される。Then, as shown in FIGS. 6 and 7, streaky irregularities due to laser scanning on the surface of the coating layer 7 are smoothed, and the texture of the metal base material 1 in the boundary layer 8 and its vicinity is obtained. And the structure of the coating layer 7 are mutually diffused to form a so-called gradient function portion 9 having no boundary layer 8 whose distribution shows a continuous change from the metal base material 1 side to the coating layer 7 side. Is done.
【００２３】このように、被覆層７及び境界層８並びに
金属母材１表面に物理的な圧力を加えたことにより、被
覆層７の表面が平滑化されるので、腐食の問題が解消さ
れ、又、金属母材１と被覆層７とが傾斜機能部９を介し
て一体的に結合されるので、金属母材１と被覆層７とが
はく離することが防止され、理想的な高温腐食に強い金
属材料が得られる。As described above, the physical pressure is applied to the surface of the coating layer 7 and the boundary layer 8 and the surface of the metal base material 1, so that the surface of the coating layer 7 is smoothed. Further, since the metal base material 1 and the coating layer 7 are integrally connected via the gradient function part 9, the metal base material 1 and the coating layer 7 are prevented from being separated from each other, and ideal high-temperature corrosion is prevented. A strong metal material is obtained.
【００２４】上記方法は連続工程で行われる。The above method is performed in a continuous process.
【００２５】又、上記方法はあらゆる金属材料の表面処
理に適応可能であり、高温腐食に強い金属材料に限らず
様々な高機能な金属材料を作ることが可能となる。In addition, the above method is applicable to the surface treatment of all kinds of metal materials, and it is possible to produce not only metal materials resistant to high-temperature corrosion but also various high-performance metal materials.
【００２６】図８は、本発明の第二の実施例であり、レ
ーザー照射装置４による金属母材１へのレーザーの照射
位置に、被覆しようとする金属３の粉末を送給する粉末
供給装置１１を設けた他は、前記実施例と同様の構成を
備えており、同様の作用・効果を得ることができる。FIG. 8 shows a second embodiment of the present invention, in which a powder feeder for feeding powder of metal 3 to be coated to a position where a laser is applied to metal base material 1 by laser irradiator 4. Except for providing 11, the same configuration as the above embodiment is provided, and the same operation and effect can be obtained.
【００２７】図９は、本発明の第三の実施例であり、金
属母材１を板状とし、これに伴って、電気炉５よりも金
属母材１の送り方向１０下流側にプレス装置１２を配設
した他は、前記実施例とほぼ同様の構成を備えており、
同様の作用・効果を得ることができる。FIG. 9 shows a third embodiment of the present invention, in which the metal base material 1 is formed in a plate shape, and accordingly, a pressing device is provided downstream of the electric furnace 5 in the feed direction 10 of the metal base material 1. Except for arranging No. 12, it has substantially the same configuration as the previous embodiment,
Similar functions and effects can be obtained.
【００２８】この場合には、メタルスプレー装置２とレ
ーザー照射装置４は金属母材１の幅方向１３へ走査させ
るようにする。In this case, the metal spray device 2 and the laser irradiation device 4 scan the metal base material 1 in the width direction 13.
【００２９】尚、本発明は、上述の実施例にのみ限定さ
れるものではなく、金属母材１の表面に被覆しようとす
る金属３を配置する方法はメタルスプレーや粉末供給に
限らず溶射やメッキその他の方法を用いても良いこと、
連続工程に限らず不連続工程で実施しても良いこと、金
属母材が板状をしている場合にはプレス装置に代えて圧
延ロールを用いても良いこと、その他、本発明の要旨を
逸脱しない範囲内において種々変更を加え得ることは勿
論である。It should be noted that the present invention is not limited to the above-described embodiment, and the method of arranging the metal 3 to be coated on the surface of the metal base material 1 is not limited to metal spraying or powder supply, but may be spraying or spraying. That plating or other methods may be used,
Not only a continuous step but also a discontinuous step, if the metal base material is in the form of a plate, a rolling roll may be used instead of the pressing device, and the other points of the present invention. Of course, various changes can be made without departing from the scope.
【００３０】[0030]
【発明の効果】以上説明したように、本発明の金属材料
の表面処理方法によれば、高機能な金属材料を自由に得
ることができるという優れた効果を奏し得る。As described above, according to the surface treatment method of a metal material of the present invention, an excellent effect that a high-performance metal material can be obtained freely can be obtained.
【図１】本発明の第一の実施例の工程全体図である。FIG. 1 is an overall process diagram of a first embodiment of the present invention.
【図２】金属母材の表面に被覆しようとする金属を配置
した状態を示す図である。FIG. 2 is a view showing a state in which a metal to be coated is arranged on a surface of a metal base material.
【図３】図２の場合における金属母材と被覆しようとす
る金属との組織の状態を示すグラフである。FIG. 3 is a graph showing a structure of a metal base material and a metal to be coated in the case of FIG. 2;
【図４】図２の被覆しようとする金属にレーザーを照射
した後の金属母材と被覆しようとする金属と境界層との
状態を示す図である。4 is a diagram showing a state of a metal base material, a metal to be coated, and a boundary layer after irradiating a metal to be coated in FIG. 2 with a laser.
【図５】図４の場合における金属母材と被覆しようとす
る金属との組織の状態を示すグラフである。5 is a graph showing the structure of the metal base material and the metal to be coated in the case of FIG. 4;
【図６】図４の金属母材と被覆しようとする金属と境界
層とに物理的な圧力を加えた後の金属母材と被覆しよう
とする金属と傾斜機能部との状態を示す図である。FIG. 6 is a diagram showing the state of the metal base material, the metal to be coated, and the functionally graded portion after physical pressure is applied to the metal base material, the metal to be coated, and the boundary layer in FIG. is there.
【図７】図６の場合における金属母材と被覆しようとす
る金属との組織の状態を示すグラフである。FIG. 7 is a graph showing the structure of the metal base material and the metal to be coated in the case of FIG. 6;
【図８】本発明の第二の実施例の工程全体図である。FIG. 8 is an overall process diagram of a second embodiment of the present invention.
【図９】本発明の第三の実施例の工程全体図である。FIG. 9 is an overall process diagram of a third embodiment of the present invention.
１ 金属母材 ２ メタルスプレー装置 ３ 被覆しようとする金属 ４ レーザー照射装置 ５ 電気炉 ６ 抜き型 ７ 被覆層 ８ 境界層 ９ 傾斜機能部 １１ 粉末供給装置 １２ プレス装置 REFERENCE SIGNS LIST 1 metal base material 2 metal spray device 3 metal to be coated 4 laser irradiation device 5 electric furnace 6 blanking die 7 coating layer 8 boundary layer 9 gradient function unit 11 powder supply device 12 press device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 根崎 孝二 神奈川県横浜市磯子区新中原町１番地 石川島播磨重工業株式会社 技術研究所 内 (56)参考文献 特開 昭61−119615（ＪＰ，Ａ) 特開 昭62−118990（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C23C 10/28 B23K 26/00 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Koji Nezaki, inventor, Technical Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd., 1-1-1 Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture (56) References JP-A-62-118990 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C23C 10/28 B23K 26/00
Claims (1)
を配置し、次に、被覆しようとする金属に金属母材の表
面側からレーザーを照射して、被覆しようとする金属を
溶融することにより、金属母材の表面に被覆しようとす
る金属の被覆層を形成すると共に、金属母材と被覆層と
の間に両者の組織が部分的に入り混じった境界層を形成
し、更に、少なくとも被覆層から金属母材の表面までの
部分を加熱して被覆層から金属母材の表面までの部分に
圧力を加えることにより、被覆層表面を平滑化すると共
に、前記境界層及びその近傍における金属母材の組織と
被覆層の組織とを相互に拡散させて両者の分布が金属母
材側から被覆層側へかけて連続的な変化を示す境界層の
ない傾斜機能部を形成することを特徴とする金属材料の
表面処理方法。1. A metal to be coated is disposed on the surface of a metal base material, and then the metal to be coated is irradiated with a laser from the surface side of the metal base material to melt the metal to be coated. By this, while forming a coating layer of the metal to be coated on the surface of the metal base material, to form a boundary layer between the metal base material and the coating layer partially mixed with the structure of both, further, By heating at least the portion from the coating layer to the surface of the metal base material and applying pressure to the portion from the coating layer to the surface of the metal base material, the coating layer surface is smoothed and the boundary layer and its vicinity are removed. The structure of the metal base material and the structure of the coating layer are mutually diffused to form a gradient functional part without a boundary layer in which the distribution of the both changes continuously from the metal base material side to the coating layer side. Characteristic surface treatment method for metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3084641A JP2982355B2 (en) | 1991-03-25 | 1991-03-25 | Surface treatment method for metal materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3084641A JP2982355B2 (en) | 1991-03-25 | 1991-03-25 | Surface treatment method for metal materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04297566A JPH04297566A (en) | 1992-10-21 |
| JP2982355B2 true JP2982355B2 (en) | 1999-11-22 |
Family
ID=13836320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3084641A Expired - Fee Related JP2982355B2 (en) | 1991-03-25 | 1991-03-25 | Surface treatment method for metal materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2982355B2 (en) |
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|---|---|---|---|---|
| US11235408B2 (en) | 2016-10-17 | 2022-02-01 | Mitsubishi Heavy Industries, Ltd. | Method for bonding dissimilar metals to each other |
| KR20200070875A (en) * | 2018-12-10 | 2020-06-18 | 에스 알 씨 주식회사 | Geared product with reinforced deposition surfaces and deposition system used for manufacturing the same |
| KR102206212B1 (en) * | 2018-12-10 | 2021-01-22 | 에스 알 씨 주식회사 | Geared product with reinforced deposition surfaces and deposition system used for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04297566A (en) | 1992-10-21 |
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