JPH01306065A - Overlay method for casting - Google Patents
Overlay method for castingInfo
- Publication number
- JPH01306065A JPH01306065A JP13509888A JP13509888A JPH01306065A JP H01306065 A JPH01306065 A JP H01306065A JP 13509888 A JP13509888 A JP 13509888A JP 13509888 A JP13509888 A JP 13509888A JP H01306065 A JPH01306065 A JP H01306065A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- mold
- molten metal
- powder
- material layer
- 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
- 238000000034 method Methods 0.000 title claims description 16
- 238000005266 casting Methods 0.000 title abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000012768 molten material Substances 0.000 claims description 2
- 239000000956 alloy Substances 0.000 abstract description 11
- 229910045601 alloy Inorganic materials 0.000 abstract description 11
- 239000004576 sand Substances 0.000 abstract description 3
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 2
- 239000010962 carbon steel Substances 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 40
- 239000002344 surface layer Substances 0.000 description 10
- 238000003466 welding Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鋳造体の表面層にこれと材質が異なる異種居
を形成する鋳造品の肉盛方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for overlaying a cast product, which forms a layer of different material on the surface layer of the cast product.
（従来の技術）
一般に、使用環境が過酷な鋳造品などの金属製品の場合
、その金属製品の表面に材質の異なる材料を接合したり
肉盛したりして、特殊加工を施すことにより、表面層の
耐摩耗性あるいは耐食性等の特性を向上させている。(Conventional technology) In general, in the case of metal products such as cast products that are used in harsh environments, the surface of the metal product is treated by bonding or overlaying different materials on the surface of the product, and by applying special processing. This improves the layer's properties such as wear resistance and corrosion resistance.
金属製品の特殊加工表面層を形成する手段としては、本
体の粉末原料と異種の粉末原料とを複合層にし圧力成形
する熱間静水圧プレス、異種の金属板を用いたクラッド
圧延、溶接機による肉盛溶接等がある。Means for forming the specially processed surface layer of metal products include hot isostatic pressing, which pressure-forms the powder raw material of the main body and different types of powder raw materials into a composite layer, clad rolling using different types of metal plates, and using a welding machine. There is overlay welding, etc.
（発明が解決しようとする課題）
しかし、従来の特殊表面層を形成する加工手段は、熱間
静水圧プレス機、クラッド圧延機、溶接機等の装置を用
いるため、特殊表面層を形成するための装置が大型化、
複雑化するばかりでなく、製品を造る加工工程が複数に
なり、作業性が悪いという問題がある。(Problem to be Solved by the Invention) However, conventional processing means for forming the special surface layer use equipment such as a hot isostatic press machine, a clad rolling machine, a welding machine, etc. equipment becomes larger,
There is a problem that not only is the process complicated, but also that there are multiple processing steps to make the product, resulting in poor workability.
本発明は、このような間江点を解決するためになされた
もので、鋳造品の金属表面に簡便な方法で特殊表面層を
形成する肉盛方法を提供することを（」的とする。The present invention has been made to solve this problem, and an object of the present invention is to provide a welding method for forming a special surface layer on the metal surface of a cast product using a simple method.
（課題を解決するための手段）
そのために、本発明の鋳造品の肉盛方法は、鋳型に粉末
を入れて圧力成形し、次いで前記鋳型内の粉末に金属溶
湯を注ぎ、粉末材層と溶製材層を拡散接合したことを特
徴とする。(Means for Solving the Problems) For this purpose, the method of overlaying a cast product of the present invention involves putting powder in a mold and pressure forming it, then pouring molten metal into the powder in the mold, and forming a layer of powder material and a layer of molten metal. It is characterized by diffusion bonding of the lumber layer.
本発明の鋳造品は、溶製材からなる鋳造体の表層面の部
分面または全面が粉末材からなる焼結層で被覆されてい
ることを特徴とする。The cast product of the present invention is characterized in that part or all of the surface layer of the cast body made of ingot material is covered with a sintered layer made of powder material.
（作用）
本発明による鋳造品の肉盛方法を用いると、鋳型内の圧
力成形された粉末材層に高温の金属溶湯が注がれ、金属
溶湯のもつ熱で粉末材層が焼結されるにのとき、粉末材
層と溶製材層は拡散接合される０本発明の鋳造品は、必
要とされる部分にあらかじめ肉盛用の合金粉末層を形成
し、この合金粉末層に注湯すると、製品が得られるので
簡単な操作で肉盛される。(Function) When using the method of overlaying a cast product according to the present invention, high-temperature molten metal is poured into the pressure-formed powder material layer in the mold, and the powder material layer is sintered by the heat of the molten metal. When the powder material layer and the ingot material layer are diffusion bonded, the cast product of the present invention is formed by forming an alloy powder layer for overlaying in the required part in advance, and pouring the metal into this alloy powder layer. Since the product is obtained, it can be overlaid with a simple operation.
（実施例） 本発明の実施例を図面にもとづいて説明する。(Example) Embodiments of the present invention will be described based on the drawings.
見Δｌユ
実施例１は、鋳造品の頂面に耐摩耗性の良好な表面硬化
層を肉盛する方法である。Example 1 is a method of building up a hardened surface layer with good wear resistance on the top surface of a cast product.
まず第１図に示すように、砂型からなる鋳型１の底面１
ａに肉盛用合金粉末２を敷設し、この粉末材層を加圧し
、粉末材層の厚さが５ｍｍ程度になるように成形した。First, as shown in Figure 1, the bottom surface 1 of a mold 1 made of sand mold
The alloy powder 2 for build-up was laid on a, and this powder material layer was pressurized and formed so that the thickness of the powder material layer was about 5 mm.
この粉末材層に炭素鋼からなる溶湯な図示矢印方向から
注湯する。金属溶湯の温度は１４５０℃以上にした。Molten metal made of carbon steel is poured into this powder material layer from the direction of the arrow shown in the figure. The temperature of the molten metal was set to 1450°C or higher.
ここで用いた肉盛用合金粉末および金属溶湯の化学成分
は、それぞれ
合金粉末：１．３％Ｃ１０４３％Ｓｉ、４、Ｏ％Ｃ「、
５．０％Ｍｏ、
６．５ ％Ｗ、８．０％Ｃｏ、
残部実質的にＦｅ
金属ｉ８／ｊ３＋０．４３％Ｃ１０，７％Ｍｎ、残部実
質的にＦｅ
であった。The chemical compositions of the alloy powder for overlaying and the molten metal used here were: alloy powder: 1.3%C, 1043%Si, 4, O%C.
5.0% Mo, 6.5% W, 8.0% Co, balance substantially Fe, metal i8/j3+0.43%C10, 7%Mn, balance substantially Fe.
次いで鋳型１内から鋳造品を取出し、その鋳造品は第２
図に示す形状となる。Next, the cast product is removed from the mold 1, and the cast product is transferred to the second mold.
The shape will be as shown in the figure.
得られた鋳造品３について、各部位の硬さ試験を行なっ
た結果、粉末材層４の硬度は溶製材層５に比べかなり高
硬度であることが判明した。第４図は、その鋳造品３の
各部位の硬さを示すグラフである。As a result of conducting a hardness test on each part of the obtained cast product 3, it was found that the hardness of the powder material layer 4 was considerably higher than that of the ingot material layer 5. FIG. 4 is a graph showing the hardness of each part of the cast product 3.
粉末材層４と溶製材層５の境界面は、注湯時に容易に拡
散接合される。この場合、接合部は部分的に溶融した溶
造層７を形成し、粉末材層４は、金属溶湯のもつ熱によ
り加熱され焼結されたものと推定される。The interface between the powder material layer 4 and the ingot material layer 5 is easily diffusion bonded during pouring. In this case, it is presumed that the joint portion forms a partially melted molten layer 7, and the powder material layer 4 is heated and sintered by the heat of the molten metal.
なお、肉盛部となる粉末材層４の厚さ、組織等は、鋳型
１の肉厚、材質、合金粉末の粒度、注湯温度、鋳型外面
からの冷却等により制御される。Note that the thickness, structure, etc. of the powder material layer 4, which becomes the built-up portion, are controlled by the wall thickness and material of the mold 1, the particle size of the alloy powder, the pouring temperature, cooling from the outside surface of the mold, etc.
Ｘ産■ユ
実施例２は、鋳造品の頂面および外周側面に耐摩耗性の
良好な表面硬化層を形成する肉盛方法である。Example 2 is a build-up method for forming a hardened surface layer with good wear resistance on the top surface and outer circumferential side of a cast product.
実施例２における肉盛方法の基本的な操作は、実施例１
と同様であるが、この実施例２では、第３図に示すよう
に、鋳型ｌの型内周面全面つまり底面＋ａと型内周側面
１ｂに約５ｍｍの合金粉末層６を形成している。この場
合、合金粉末層６には合金粉末に有機バインダを混合し
た混練物を用い１合金粉末層６の型内周側面１ｂへの付
着を容易にしている。The basic operation of the overlay method in Example 2 is the same as that in Example 1.
However, in this Example 2, as shown in FIG. 3, an alloy powder layer 6 of about 5 mm is formed on the entire inner circumferential surface of the mold l, that is, on the bottom surface +a and the inner circumferential side surface 1b of the mold l. . In this case, the alloy powder layer 6 is made of a kneaded mixture of alloy powder and an organic binder to facilitate adhesion of the first alloy powder layer 6 to the inner circumferential side surface 1b of the mold.
次いで粉末層６で形成される容器内に金属？８湯を注湯
する。注湯時には、砂型からなる鋳型１を真空に引いた
。Next, there is metal in the container formed by the powder layer 6. 8 Pour hot water. During pouring, the mold 1 consisting of a sand mold was evacuated.
凝固した鋳造品を鋳型１から取出したところ、肉盛部で
ある粉末材層（焼結層）６は、マイクロポアが少なく、
高硬度の肉盛層になった。 これは、焼結層６の焼結時
に発生するバインダの揮発物が真空で引くことにより確
実に吸引され、マイクロポアの発生が減少したことによ
る。When the solidified cast product was taken out of the mold 1, the powder material layer (sintered layer) 6, which is the built-up part, had few micropores.
It became a build-up layer with high hardness. This is because volatile substances of the binder generated during sintering of the sintered layer 6 are reliably sucked out by the vacuum, and the generation of micropores is reduced.
この焼結層の硬さ試験を行なった結果、ビッカース硬度
が６６０Ｈｖとなった。As a result of a hardness test of this sintered layer, the Vickers hardness was 660 Hv.
１Ｆ１述した実施例の肉盛方法では、ｆ？造品の表層に
耐摩耗性の良好な表面硬化層を形成したが、本発明の肉
盛方法は、耐食性の良好な表層その他の特性をもつが表
層を造るとき適用することができことはもちろんである
。1F1 In the overlay method of the embodiment described above, f? Although a hardened surface layer with good wear resistance is formed on the surface layer of a manufactured product, the overlay method of the present invention can of course be applied when making a surface layer with good corrosion resistance and other properties. It is.
（発明の効果）
以上述べたように、本発明による鋳造品の肉盛方法を用
いると、鋳型に粉末を入れ圧力成形し、その上に注湯す
るという極めて簡単な操作を行なうだけで、鋳造体の所
定の箇所に目的に応じた性質をもつ焼結層を形成するこ
とができるので、製品の金属表面に特殊な二次加工層を
容易にかつ作業効率よくしかも低コストに形成すること
ができるという効果がある。(Effects of the Invention) As described above, by using the overlay method for castings according to the present invention, casting can be completed by simply performing the extremely simple operations of putting powder in a mold, pressure forming it, and pouring the metal onto it. Since it is possible to form a sintered layer with properties according to the purpose at a predetermined location on the body, it is possible to form a special secondary processing layer on the metal surface of the product easily, efficiently, and at low cost. There is an effect that it can be done.
第１図は本発明の実施例の肉盛方法を説明するための概
略断面図、第２図は第１図に示す肉盛方法によって造ら
れた鋳造品を表わす概略断面図、第３図は、本発明の他
の実施例における肉盛方法を説明するための概略断面図
、第４図は鋳造品の粉末材層、溶込層および溶製材層の
各部位の硬さを示すグラフである。
１ ・・・Ｒ型、
２・・・肉盛用粉末、
３・・・鋳造品、
４・・・粉末材層、
５・・・溶製材層、
７・・・溶込層。FIG. 1 is a schematic cross-sectional view for explaining the overlay method of the embodiment of the present invention, FIG. 2 is a schematic cross-sectional view showing a cast product made by the overlay method shown in FIG. 1, and FIG. FIG. 4 is a graph showing the hardness of each part of the powder material layer, penetration layer, and ingot material layer of the cast product. . 1... R type, 2... Powder for overlaying, 3... Casting product, 4... Powder material layer, 5... Molten material layer, 7... Welding layer.
Claims (2)
内の粉末に金属溶湯を注ぎ、粉末材層と溶製材層を拡散
接合したことを特徴とする鋳造品の肉盛方法。(1) A method for overlaying a cast product, characterized in that powder is placed in a mold and pressure-formed, then molten metal is poured into the powder in the mold, and the powder material layer and the molten material layer are diffusion bonded.
面が粉末材からなる焼結層で被覆されていることを特徴
とする鋳造品。(2) A cast product, which is characterized in that part or the entire surface of the cast body made of ingot material is covered with a sintered layer made of powder material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13509888A JPH01306065A (en) | 1988-06-01 | 1988-06-01 | Overlay method for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13509888A JPH01306065A (en) | 1988-06-01 | 1988-06-01 | Overlay method for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01306065A true JPH01306065A (en) | 1989-12-11 |
Family
ID=15143789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13509888A Pending JPH01306065A (en) | 1988-06-01 | 1988-06-01 | Overlay method for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01306065A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061892A (en) * | 2005-09-02 | 2007-03-15 | Yanmar Co Ltd | Method for casting cast iron, and method for manufacturing cylinder head of internal combustion engine using the same |
| JP2007061891A (en) * | 2005-09-02 | 2007-03-15 | Yanmar Co Ltd | Method for casting cast iron, and method for manufacturing cylinder head of internal combustion engine using the same |
| JP2007061890A (en) * | 2005-09-02 | 2007-03-15 | Yanmar Co Ltd | Method for casting cast iron, and method for manufacturing cylinder head of internal combustion engine using the same |
-
1988
- 1988-06-01 JP JP13509888A patent/JPH01306065A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061892A (en) * | 2005-09-02 | 2007-03-15 | Yanmar Co Ltd | Method for casting cast iron, and method for manufacturing cylinder head of internal combustion engine using the same |
| JP2007061891A (en) * | 2005-09-02 | 2007-03-15 | Yanmar Co Ltd | Method for casting cast iron, and method for manufacturing cylinder head of internal combustion engine using the same |
| JP2007061890A (en) * | 2005-09-02 | 2007-03-15 | Yanmar Co Ltd | Method for casting cast iron, and method for manufacturing cylinder head of internal combustion engine using the same |
| JP4565561B2 (en) * | 2005-09-02 | 2010-10-20 | ヤンマー株式会社 | Method for casting cast iron and method for manufacturing cylinder head for internal combustion engine using the method |
| JP4646227B2 (en) * | 2005-09-02 | 2011-03-09 | ヤンマー株式会社 | Method for casting cast iron and method for manufacturing cylinder head for internal combustion engine using the method |
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