JP4532527B2 - Cast composite - Google Patents

Cast composite Download PDF

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JP4532527B2
JP4532527B2 JP2007169205A JP2007169205A JP4532527B2 JP 4532527 B2 JP4532527 B2 JP 4532527B2 JP 2007169205 A JP2007169205 A JP 2007169205A JP 2007169205 A JP2007169205 A JP 2007169205A JP 4532527 B2 JP4532527 B2 JP 4532527B2
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granular
wear
base material
casting
columnar body
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JP2009006347A (en
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康徳 三井
浩二 牧野
松野　　進
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Kurimoto Ltd
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本発明は、母材表面の所定の部位に耐摩耗材を鋳ぐるみによって溶着した鋳造複合材に関する。   The present invention relates to a cast composite material in which a wear-resistant material is welded to a predetermined part on the surface of a base material by casting.

鋳物表面の改質方法の一つとして知られる鋳ぐるみは、予め改質用合金類で形成した部材を鋳型内にセットし、この鋳型内に母材の溶湯を鋳込むことにより改質合金類を母材に溶着するもので、鋳物の所定部位の耐摩耗性改善等のために従来からよく行われている（特許文献１参照。）。
特開平６−１９０５３７号公報（段落０００５） Cast walnuts, known as one of the methods for reforming the casting surface, are made by setting a member previously formed of a reforming alloy in a mold and casting a molten metal as a base material in the mold. Has been conventionally performed to improve the wear resistance of a predetermined part of a casting (see Patent Document 1).
JP-A-6-190537 (paragraph 0005)

上記鋳ぐるみ法によって製造される鋳造複合材の一例として、原料装入用シュートのライナにおいて、原料を受ける面に耐摩耗材を溶着したものがある。   As an example of a cast composite material manufactured by the above-described casting method, there is a material charging chute liner in which a wear-resistant material is welded to the surface receiving the raw material.

ところで、上記のようなライナを鋳造する際には、通常、鋳型内の所定面上に耐摩耗材で形成された粒状体を並べて粒状体層を形成し、その所定面の外周側の数箇所から溶湯を注ぐようにしているので、ライナ中央部分では溶湯温度が低下し粒状体の溶着強度が低くなりやすい。このため、このような鋳造複合材のライナでは、使用中に耐摩耗材の一部が剥離し、その位置から母材の摩耗が進んで寿命が大幅に短縮されることがある。   By the way, when casting a liner as described above, usually, a granular material layer is formed by arranging granular materials formed of wear-resistant material on a predetermined surface in a mold, and from several locations on the outer peripheral side of the predetermined surface. Since the molten metal is poured, the molten metal temperature is lowered at the central portion of the liner, and the weld strength of the granular material tends to be lowered. For this reason, in such a cast composite liner, a part of the wear-resistant material may be peeled off during use, and the wear of the base material may proceed from that position, so that the life may be significantly shortened.

本発明の課題は、母材表面に溶着した耐摩耗材が剥離しにくい鋳造複合材を提供することである。   An object of the present invention is to provide a cast composite material in which the wear-resistant material welded to the base material surface is difficult to peel off.

上記の課題を解決するために、本発明は、母材表面の所定の部位に耐摩耗材を鋳ぐるみによって溶着した鋳造複合材において、前記母材表面の所定部位には、前記耐摩耗材で形成された粒状体が母材を覆うように並べられて粒状体層が形成されており、前記耐摩耗材で形成された柱状体が、所定の間隔で前記粒状体層から母材へ埋め込まれた構成を採用した。   In order to solve the above-described problems, the present invention provides a cast composite material in which a wear-resistant material is welded to a predetermined portion of a base material surface by casting, and is formed of the wear-resistant material at a predetermined portion of the base material surface. The granular body is arranged so as to cover the base material, and the granular body layer is formed, and the columnar body formed of the wear-resistant material is embedded from the granular body layer to the base material at a predetermined interval. Adopted.

すなわち、母材表面の所定部位に、母材を覆う耐摩耗材の粒状体層と、多数の耐摩耗材の柱状体とを、柱状体が粒状体層から母材へ埋め込まれる状態で溶着することにより、粒状体層のみを溶着する場合に比べて、柱状体の母材への埋込部の分だけ耐摩耗材と母材の溶着面積を大きくして、耐摩耗材の溶着強度を高めたのである。   That is, by welding the granular material layer of the wear-resistant material covering the base material and a large number of wear-resistant material columnar bodies to a predetermined part of the base material surface in a state where the columnar bodies are embedded from the granular material layer into the base material. Compared with the case where only the granular material layer is welded, the welding area of the wear resistant material and the base material is increased by the amount of the portion embedded in the base material of the columnar body, thereby increasing the welding strength of the wear resistant material.

上記の構成において、前記各柱状体の周囲に前記粒状体が並べられるようにすることにより、各柱状体の周囲から摩耗が進むのを防止することができる。   In the above configuration, by causing the granular bodies to be arranged around the respective columnar bodies, it is possible to prevent wear from proceeding from the surroundings of the respective columnar bodies.

前記母材の材質として高クロム鋳鉄を採用するとともに、前記耐摩耗材として炭化タングステンを主成分とする超硬合金を採用することができる。   High chromium cast iron can be used as the material of the base material, and a cemented carbide containing tungsten carbide as a main component can be used as the wear resistant material.

本発明の鋳造複合材は、上述したように、母材表面の所定部位に、母材を覆う耐摩耗材の粒状体層と、多数の耐摩耗材の柱状体とを、柱状体が粒状体層から母材へ埋め込まれる状態で溶着したものであるから、耐摩耗材の溶着強度が高く、耐摩耗材が剥離しにくい。従って、従来のように耐摩耗材の剥離部から早期摩耗を生じることもなく、長期間安定して使用することができる。   As described above, the cast composite material of the present invention includes a wear resistant material granular layer covering the base material and a number of wear resistant material columnar bodies at predetermined locations on the surface of the base material. Since it is welded while being embedded in the base material, the wear resistance of the wear resistant material is high, and the wear resistant material is difficult to peel off. Therefore, it can be used stably for a long period of time without causing early wear from the peeled portion of the wear-resistant material as in the prior art.

以下、図面に基づき、本発明の実施形態を説明する。この実施形態の鋳造複合材は、原料装入用シュート（図示省略）に取り付けられるライナで、図１（ａ）、（ｂ）に示すように、高クロム鋳鉄で形成された厚板状の母材１の一面に、炭化タングステンを主成分とする超硬合金を耐摩耗材として鋳ぐるみによって溶着したものである。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The cast composite material of this embodiment is a liner attached to a raw material charging chute (not shown). As shown in FIGS. 1A and 1B, a thick plate-shaped mother made of high chromium cast iron is used. A cemented carbide mainly composed of tungsten carbide is welded to one surface of the material 1 as a wear-resistant material by casting.

前記母材１の一面には、前記超硬合金で形成された直径８ｍｍの粒状体２が母材１を覆うように並べられ、これにより粒状体層３が形成されている。また、その中央部分には、粒状体２と同じ材質で直径１０ｍｍの多数の柱状体４が、粒状体層３を貫通して母材１へ埋め込まれている。ここで、各柱状体４の埋込位置は、ライナの長手方向に沿って並ぶとともに、ライナ長手方向と６０°をなす直線に沿って並び、かつ柱状体４どうしの間隔ｄがすべて７ｍｍとなるように配されている。これにより、図２に示すように、各柱状体４の周囲に粒状体２が密に並べられるようになっている。そして、これらの粒状体２および柱状体４が、後述するように鋳ぐるみによって母材１に溶着されている。   On one surface of the base material 1, the granulates 2 having a diameter of 8 mm formed of the cemented carbide are arranged so as to cover the base material 1, whereby the granular material layer 3 is formed. In addition, a large number of columnar bodies 4 having the same material as the granular body 2 and having a diameter of 10 mm are embedded in the base material 1 through the granular body layer 3 in the central portion. Here, the embedding positions of the respective columnar bodies 4 are aligned along the longitudinal direction of the liner, aligned along a straight line that forms 60 ° with the longitudinal direction of the liner, and the distances d between the columnar bodies 4 are all 7 mm. Is arranged. Thereby, as shown in FIG. 2, the granular bodies 2 are arranged closely around each columnar body 4. And these granular material 2 and the columnar body 4 are welded to the preform | base_material 1 with the cast hole so that it may mention later.

なお、前記柱状体４の配列は、図１および図２に示したものに限らず、種々のパターンを採用できる。また、柱状体４の直径は５〜１５ｍｍの範囲で変更可能である。５ｍｍ未満にすると、超硬合金溶着面に落下してきた原料の衝撃等で柱状体４が折損することがあり、１５ｍｍを超えると、鋳造時の溶湯の熱衝撃により柱状体４が割れることがあるからである。一方、粒状体２の直径は、柱状体４の配置に応じて各柱状体４の周囲に並べられる大きさに設定すればよいが、小さすぎると粒状体層３が薄くなって耐摩耗性の点で不利になるので、４〜１２ｍｍ程度とすることが望ましい。   In addition, the arrangement | sequence of the said columnar body 4 is not restricted to what was shown in FIG.1 and FIG.2, A various pattern is employable. The diameter of the columnar body 4 can be changed within a range of 5 to 15 mm. If it is less than 5 mm, the columnar body 4 may break due to the impact of the raw material falling on the cemented carbide welding surface, and if it exceeds 15 mm, the columnar body 4 may break due to the thermal shock of the molten metal during casting. Because. On the other hand, the diameter of the granular body 2 may be set to a size arranged around each columnar body 4 according to the arrangement of the columnar bodies 4, but if it is too small, the granular body layer 3 becomes thin and wear-resistant. Since this is disadvantageous, it is desirable that the thickness be about 4 to 12 mm.

このライナを鋳ぐるみ法により鋳造する際には、まず、前記柱状体４の図１の状態よりも長いものを用意し、この柱状体４の一部を図示省略した鋳型内の所定面に埋め込む。そして、その所定面の柱状体４埋込位置以外の部分に前記粒状体２を並べることにより、柱状体４が粒状体層３から鋳型内の空間に突出する状態にセットして、所定面の外周側の数箇所から高クロム鋳鉄の溶湯を注ぐ。   When casting this liner by the cast-in method, first, a columnar body 4 longer than the state shown in FIG. 1 is prepared, and a part of the columnar body 4 is embedded in a predetermined surface in a mold not shown. . Then, by arranging the granular body 2 in a portion other than the position where the columnar body 4 is embedded in the predetermined surface, the columnar body 4 is set to protrude from the granular layer 3 into the space in the mold, Pour high chromium cast iron melt from several locations on the outer circumference.

このとき、鋳型内に注がれた溶湯はライナ中央部分に近づくほど温度低下するため、ライナ中央部分で粒状体２の溶着強度が低くなりやすい。しかし、ライナ中央部分では柱状体４が母材１へ埋め込まれるようにしているので、粒状体層３のみを溶着する場合よりも柱状体４の埋込部の分だけ超硬合金と母材１の溶着面積が大きくなり、超硬合金の溶着強度が高くなっている。その後、鋳型を取り外すとともに、柱状体４の鋳型に埋め込まれた部分を切断除去することにより、図１に示した製品状態が得られる。   At this time, since the temperature of the molten metal poured into the mold decreases as it approaches the center portion of the liner, the welding strength of the granular material 2 tends to be low at the center portion of the liner. However, since the columnar body 4 is embedded in the base material 1 in the central portion of the liner, the cemented carbide and the base material 1 are equivalent to the embedded portion of the columnar body 4 than when only the granular layer 3 is welded. As a result, the welding area of the cemented carbide increases. Then, while removing a casting_mold | template and cutting and removing the part embedded in the casting_mold | template of the columnar body 4, the product state shown in FIG. 1 is obtained.

このライナは、上述したように、母材１の一面の中央部分に、母材１を覆う超硬合金の粒状体層３と、多数の超硬合金の柱状体４とを、柱状体４が粒状体層３から母材１へ埋め込まれる状態で溶着することにより、中央部分の粒状体２の溶着強度の低さを柱状体４の溶着面積の大きさで補って、超硬合金の溶着強度を高めたので、超硬合金の剥離が生じにくい。また、各柱状体４の周囲に粒状体２が密に並べられているため、柱状体４の周囲から摩耗が進むこともない。さらに、柱状体４が鋳造時の注湯による粒状体２の流れ移動を防ぐ役割もはたすので、粒状体２の欠落のない超硬合金溶着面が形成され、この点でも従来よりも耐摩耗性に優れたものとなっている。   As described above, in this liner, the cemented carbide granular material layer 3 covering the base material 1 and a number of cemented carbide columnar bodies 4 are arranged at the center of one surface of the base material 1. By welding while being embedded in the base material 1 from the granular material layer 3, the low welding strength of the granular material 2 in the central portion is compensated by the size of the welded area of the columnar body 4, and the welding strength of the cemented carbide. As a result, the cemented carbide is hardly peeled off. In addition, since the granular bodies 2 are densely arranged around each columnar body 4, wear does not proceed from the periphery of the columnar bodies 4. Furthermore, since the columnar body 4 also plays a role of preventing the flow of the granular body 2 due to pouring during casting, a cemented carbide welded surface free of the granular body 2 is formed. It has become an excellent one.

なお、本発明は、実施形態のような原料装入用シュートのライナに限らず、母材表面に耐摩耗材を鋳ぐるみによって溶着した種々の鋳造複合材に対して、広く適用することができる。   The present invention is not limited to the raw material charging chute liner as in the embodiment, and can be widely applied to various cast composite materials in which a wear-resistant material is welded to the base material surface by casting.

ａは実施形態のライナ（鋳造複合材）の平面図、ｂはａの縦断面図a is a plan view of the liner (casting composite material) of the embodiment, b is a longitudinal sectional view of a 図１（ｂ）のII−II線に沿った拡大断面図Enlarged sectional view taken along line II-II in FIG.

符号の説明Explanation of symbols

１ 母材
２ 粒状体
３ 粒状体層
４ 柱状体 1 Base Material 2 Granule 3 Granule Layer 4 Columnar

Claims (2)

母材表面の所定の部位に耐摩耗材を鋳ぐるみによって溶着した鋳造複合材において、前記母材表面の所定部位には、前記耐摩耗材で形成された粒状体が母材を覆うように並べられて粒状体層が形成されており、前記耐摩耗材で粒状体の径よりも長く形成された柱状体が、所定の間隔で前記粒状体層の中央部分を貫通して母材へ埋め込まれていることを特徴とする鋳造複合材。 In a cast composite material in which a wear-resistant material is welded to a predetermined part of the base material surface by casting, the granular material formed of the wear-resistant material is arranged on the predetermined part of the base material surface so as to cover the base material. A granular layer is formed, and the columnar body formed with the wear-resistant material longer than the diameter of the granular body penetrates the central portion of the granular layer at a predetermined interval and is embedded in the base material. Cast composite material characterized by 前記各柱状体の周囲に前記粒状体が並べられていることを特徴とする請求項１に記載の鋳造複合材。   The cast composite material according to claim 1, wherein the granular materials are arranged around each columnar body.
JP2007169205A 2007-06-27 2007-06-27 Cast composite Active JP4532527B2 (en)

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Publication number Priority date Publication date Assignee Title
JP5013349B2 (en) * 2010-10-15 2012-08-29 哲男 原田 Cemented carbide casting method
JP5472822B2 (en) * 2011-02-09 2014-04-16 株式会社栗本鐵工所 Abrasion resistant composite
JP6030507B2 (en) * 2013-06-10 2016-11-24 株式会社栗本鐵工所 Composite wear-resistant parts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184570A (en) * 1981-04-27 1982-11-13 Kennametal Inc Casting with abrasion resisting shape and its manufacture
JPH069746U (en) * 1992-07-21 1994-02-08 日立ツール株式会社 Concrete pump wear plate
JP2001096182A (en) * 1999-10-01 2001-04-10 Nisshin Steel Co Ltd Long-life receiving tooth for crushing sintered mineral by internal chill brazing method
JP2002224813A (en) * 2001-01-29 2002-08-13 Toyota Central Res & Dev Lab Inc Insert member, its producing method and cast product cast with the insert
JP2003220462A (en) * 2002-01-24 2003-08-05 Sinto Brator Co Ltd Abrasion-resistant composite and its manufacturing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184570A (en) * 1981-04-27 1982-11-13 Kennametal Inc Casting with abrasion resisting shape and its manufacture
JPH069746U (en) * 1992-07-21 1994-02-08 日立ツール株式会社 Concrete pump wear plate
JP2001096182A (en) * 1999-10-01 2001-04-10 Nisshin Steel Co Ltd Long-life receiving tooth for crushing sintered mineral by internal chill brazing method
JP2002224813A (en) * 2001-01-29 2002-08-13 Toyota Central Res & Dev Lab Inc Insert member, its producing method and cast product cast with the insert
JP2003220462A (en) * 2002-01-24 2003-08-05 Sinto Brator Co Ltd Abrasion-resistant composite and its manufacturing method

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