JPS6272461A - Production of partially dispersion strengthened type alloy - Google Patents

Abstract

PURPOSE:To prevent a metallic oxide from floating on the surface or settling into a molten metal by liberating from a base metal by incorporating the particles of the metallic oxide into the molten metal and installing a chiller into the cavity of a casting mold. CONSTITUTION:An inert gas is passed in a passage 9a and a vibrator 9c operates just before a molten metal A is poured from a ladle 8 into a sprue 7. Then, a prescribed amt. of metallic powder M is added into the molten metal and is fed together with the molten metal into the sprue 7 to fill the inside of the cavity 2. Part of the molten metal is quickly cooled by the chiller 3 in this stage and is thereby quickly solidified; on the other hand, the molten metal is replenished from risers 4, 5 into the cavity 2 in the same manner as heretofore to prevent the generation of a shrinkage cavity and therefore, the metallic oxide incorporated into the base material is retained in the base metal without being liberated therefrom.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、ガラス鋳造用鋳型材料、電気摺動接点など
に好適な耐摩耗性、高硬度の銅合金を製造するに際し、
母材の持つ導電性、熱伝導率を大きく下げることなく製
造する製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for producing a wear-resistant, high-hardness copper alloy suitable for glass casting mold materials, electric sliding contacts, etc.
This relates to a manufacturing method that does not significantly reduce the electrical conductivity and thermal conductivity of the base material.

〔従来の技術、その問題点〕[Conventional technology and its problems]

一般に、金属酸化物を分散させた銅合金は常温から高温
に至る間、高い強度を有し、且つ導電性も優れているこ
とが知られており、通常、その製造方法を大別すると３
種ある。It is generally known that copper alloys with metal oxides dispersed in them have high strength and excellent conductivity from room temperature to high temperatures.
There are seeds.

−は酸化し易い金属を固溶した銅合金のインゴットを圧
延して極薄の板材となし、これを９００〜１０００℃の
酸化性ガズ雰囲気中で加熱して、母材中に微細な酸化物
を生成させるものである。- is a copper alloy ingot containing a solid solution of easily oxidized metal, which is rolled into an ultra-thin sheet material, which is then heated in an oxidizing gas atmosphere at 900 to 1000°C to form fine oxides in the base material. is generated.

二は酸化し易い金属を固溶した銅合金粉末を９００〜１
０００℃の酸化性ガス雰囲気中で加熱して母材中に金属
酸化物を生成させた後、圧縮して圧粉体とするものであ
る。2. Copper alloy powder with solid solution of easily oxidized metal 900~1
After heating in an oxidizing gas atmosphere at 000°C to generate metal oxides in the base material, the base material is compressed to form a green compact.

三は母材の溶湯中に酸化し易い金属を混入し、溶湯を攪
拌しながら酸化性のガスを吹き込んで金属酸化物を生成
させ、次いで、還元性のガスを吹き込んで、一部に生じ
た酸化銅を還元した後、これを別途に用意した銅または
銅合金の溶湯中に混合した混合溶湯を鋳型内へ鋳造する
ものである。Third, a metal that is easily oxidized is mixed into the molten base metal, and while stirring the molten metal, an oxidizing gas is blown into the molten metal to generate metal oxides. After copper oxide is reduced, it is mixed with a separately prepared molten copper or copper alloy, and the mixed molten metal is cast into a mold.

また、鋳造される溶湯並びに添加物はこの発明と異なる
もの＼鋳造方法として近似するものに特公昭５２−８９
２号公報がある。Furthermore, the molten metal and additives to be cast are different from those of this invention.
There is a No. 2 publication.

然るに、−１二の方法は固溶体組織の銅合金の一部成分
を酸化させねばならないため、技術上おび設備能力の面
から実用性に乏しい。また、三の方法は特別なガス吹き
込み装置や攪浮装置を要し、且つ固形物を含む液体を鋳
造しなければならないため鋳造性が悪く、酸化物が母材
から分離しやすいので単純な形のものにしか使用できな
いなど、改良を要する部分が多々ある。However, method -12 requires oxidation of some components of the copper alloy in the solid solution structure, and is therefore impractical from the viewpoint of technology and equipment capacity. In addition, the third method requires special gas blowing equipment and agitation equipment, and requires casting a liquid containing solids, resulting in poor castability.The oxide easily separates from the base material, making it difficult to form simple shapes. There are many areas that need improvement, such as the fact that it can only be used for certain items.

〔発明の目的、構成の概要〕[Object of the invention, outline of the structure]

この発明は上記不具合がなく、従来の設備に簡単な改良
を加えることで、実用可能な製造方法を得ることを目的
とするもので、母材をなす溶湯を鋳型中へ鋳込む際、溶
湯中へ前記金属酸化物の粒子を混入させると共に、鋳型
のキャビティ内の少なくとも上面か下面かのいずれかに
冷し金を設置し、キャビティ内へ流入した溶湯の凝固以
前に金１７１酸化物が浮上或いは沈降するのを防止した
ことを特徴とする製造方法に関する。The purpose of this invention is to obtain a practical manufacturing method that does not have the above-mentioned problems and makes simple improvements to conventional equipment. In addition to mixing the metal oxide particles into the mold, a cooling metal is installed at least on either the upper or lower surface of the mold cavity to prevent gold-171 oxide from floating or rising before the molten metal flowing into the cavity solidifies. The present invention relates to a manufacturing method characterized in that sedimentation is prevented.

〔作用〕[Effect]

鋳造に際し、鋳型中へ鋳込まれる溶湯中へ金泥酸化物が
添加され、キャビティ内で攪拌されるので、それらは母
材内部へ一様に分布する。また、キャビティ内では冷し
金によって表面を急速に冷却させるので、酸化金属が母
材から遊離して表面へ浮上し或いは沈降するのを防止す
る。During casting, gold mud oxides are added to the molten metal poured into the mold and stirred within the cavity, so that they are uniformly distributed inside the base material. Furthermore, since the surface is rapidly cooled by a chiller inside the cavity, metal oxide is prevented from being liberated from the base material and floating to the surface or settling.

〔実施例〕〔Example〕

以下、この発明を図示の実施例に基づいて説明すると、
図中、ｌは鋳型であり、内部に鋳造されるべき製品の形
態と逆形の内面を形成したキャビティ２が形成されてい
る。３はキャビティ２内へ設置された冷し金、４．５は
押し湯、６はゲート、７は湯口、８は鋳型ｌへ溶湯Ａを
注入する取鍋であり、従来公知のものと特に異なるもの
ではない。Hereinafter, this invention will be explained based on illustrated embodiments.
In the figure, l denotes a mold, in which a cavity 2 is formed, the inner surface of which is in the opposite shape to the shape of the product to be cast. 3 is a cooling metal installed in the cavity 2, 4.5 is a riser, 6 is a gate, 7 is a sprue, and 8 is a ladle for injecting molten metal A into the mold l, which is particularly different from conventionally known ones. It's not a thing.

こ＼で、’ｔｇ　／＆Ａは１２１０℃に加熱された銅合
金で０．０２％の燐を含んでいる。また、添加物はアル
ミナの鱗状粉末である。Here, 'tg/&A is a copper alloy heated to 1210°C and contains 0.02% phosphorus. The additive is alumina scaly powder.

９はこの発明に係る金属酸化物の添加装置であり、湯ロ
アに向けて開く窒素ガスその他の不活性ガス通路９ａの
途中にホッパ９ｂが設けてあり、ホッパ９ｂはパイブレ
ーク９Ｃにより加振され、内部の金属酸化物粉末Ｍの不
活性ガス通路９ａに対する流下を円滑にしている。なお
、金属粉末Ｍはこの実施例の鱗状アルミナに限らず、微
細な粉状のものから粒状をなすものを含む概念である。Reference numeral 9 denotes a metal oxide addition device according to the present invention, in which a hopper 9b is provided in the middle of a nitrogen gas or other inert gas passage 9a that opens toward the hot water lower, and the hopper 9b is excited by a pie break 9C. , the internal metal oxide powder M flows smoothly down into the inert gas passage 9a. Note that the metal powder M is not limited to the scaly alumina of this embodiment, but is a concept that includes anything from fine powder to granular.

斯くて、取鍋８から湯ロア内へ溶湯Ａが注入される直前
に通路９ａに不活性ガスが流され、所定時間バイブレー
タ９ｃが作用すると、所定量の金属粉末Ｍが溶湯中に添
加され、溶湯と共に湯ロア内へ注入され、キャビティ２
内を満たす。このとき、／８湯の一部は冷し金３によっ
て急冷され、急速に凝固する一方、キャビティ２内へは
従来と同様に押し湯４．５から溶湯が補給され、引は巣
（シュリンク）を生じないようにしているので、銅又は
銅合金の母材中に混入した金泥酸化物を母材から遊離さ
せず母材中に留めることができる。In this way, immediately before the molten metal A is injected into the hot water lower from the ladle 8, an inert gas is flowed into the passage 9a, and when the vibrator 9c is activated for a predetermined period of time, a predetermined amount of metal powder M is added into the molten metal. It is injected into the hot water lower together with the molten metal, and is poured into the cavity 2.
fill the inside. At this time, a part of the /8 hot water is rapidly cooled by the chiller 3 and rapidly solidified, while molten metal is replenished into the cavity 2 from the riser 4.5 as before, and the shrinkage occurs. Therefore, the gold mud oxide mixed in the copper or copper alloy base metal can be retained in the base metal without being released from the base metal.

斯くて、この実施例では、銅９０ｆｆｉｉ％に対し、ア
ルミナ１０重量％を混合して鋳造した結果、表層から３
１１ＩＩ１１の深さ迄、平均９０　ＩＩ　Ｂ、深さ３〜
５■では平均１３８１１Ｂの硬度を得た。Therefore, in this example, as a result of casting a mixture of 90% copper and 10% by weight alumina, 3% from the surface layer was cast.
Up to a depth of 11 II 11, average 90 II B, depth 3 ~
5■, an average hardness of 13811B was obtained.

〔発明の効果〕〔Effect of the invention〕

よって、この発明によれば、母材の溶湯中へ合金される
べき高硬度の金属酸化物の粒子を混入させるから、母材
と金属酸化物の粒子との混合が一様に行われ、然も、キ
ャビティ２内にあっては冷し金３によって溶湯の表面へ
金属酸化物が遊離浮上するのを抑止するから、それらは
鋳造品の内部に止められる効果がある。Therefore, according to the present invention, since the particles of the highly hard metal oxide to be alloyed are mixed into the molten metal of the base metal, the base metal and the metal oxide particles are uniformly mixed, and the metal oxide particles are uniformly mixed. Also, in the cavity 2, the chill metal 3 prevents metal oxides from freely floating to the surface of the molten metal, which has the effect of stopping them inside the cast product.

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

図面はこの発明の一実施例を示す、鋳造装置の断面図で
ある。 ３・−・冷し金、　９−・金に酸化物の添加装置、８ａ
−不活性ガス通路、　Ｍ−・金属酸化物粉末、特許出願
人　　ヤマハ発動機株式会社 ■血の！’Ｉ”−ｔシ（内′６に変更なし）鬼　１田 手続補正書（方式） １、事件の表示 昭和６０年特許願第２１４１０５号 ２、発明の名称 部分的分散強化型合金の製造方法 ３、補正をする者 事件との関係　　特許出願人 ４、補正指令の日付 昭和６１年１月８日 （発送日　昭和６１年１月２８日） ５、補正の対象 ■　明細書の図面の簡単な説明の欄。The drawing is a sectional view of a casting device showing an embodiment of the present invention. 3.--Cold gold, 9-.Device for adding oxide to gold, 8a
-Inert gas passage, M-・Metal oxide powder, patent applicant Yamaha Motor Co., Ltd. ■Blood! 'I'-tshi (No change in '6) Oni 1 Den Procedural Amendment (Method) 1. Indication of the case 1985 Patent Application No. 214105 2. Name of the invention Method for producing partially dispersion-strengthened alloy 3. Relationship with the case of the person making the amendment Patent applicant 4. Date of the amendment order: January 8, 1985 (Shipping date: January 28, 1986) 5. Subject of the amendment■ Brief description of the drawings in the specification Description field.

Claims (3)

【特許請求の範囲】[Claims] （１）母材をなす溶湯を鋳型中へ鋳込む際、溶湯中へ前
記金属酸化物の粒子を混入させると共に、鋳型のキャビ
ティ内の少なくとも上面か下面かのいずれかに冷し金を
設置し、キャビティ内へ流入した溶湯の凝固以前に金属
酸化物が浮上或いは沈降するのを防止したことを特徴と
する部分的分散強化型合金の製造方法。(1) When pouring the molten metal that forms the base material into the mold, the particles of the metal oxide are mixed into the molten metal, and a cooling metal is installed at least on either the upper or lower surface of the cavity of the mold. A method for producing a partially dispersion-strengthened alloy, characterized in that metal oxides are prevented from floating or settling before the molten metal flowing into the cavity solidifies. （２）母材をなす溶湯は銅又は銅合金である特許請求の
範囲第１項記載の部分的分散強化型合金の製造方法。(2) The method for producing a partially dispersion-strengthened alloy according to claim 1, wherein the molten metal forming the base material is copper or a copper alloy. （３）母材に混合されるべき金属酸化物はアルミナであ
る特許請求の範囲第１項記載の部分的分散強化型合金の
製造方法。(3) The method for producing a partially dispersion strengthened alloy according to claim 1, wherein the metal oxide to be mixed into the base material is alumina.