JPS6027744B2 - Manufacturing method of graphite-containing aluminum alloy - Google Patents
Manufacturing method of graphite-containing aluminum alloyInfo
- Publication number
- JPS6027744B2 JPS6027744B2 JP8871781A JP8871781A JPS6027744B2 JP S6027744 B2 JPS6027744 B2 JP S6027744B2 JP 8871781 A JP8871781 A JP 8871781A JP 8871781 A JP8871781 A JP 8871781A JP S6027744 B2 JPS6027744 B2 JP S6027744B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- graphite particles
- weight
- molten metal
- dispersed
- 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
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 86
- 239000010439 graphite Substances 0.000 title claims description 85
- 229910002804 graphite Inorganic materials 0.000 title claims description 85
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 6
- 239000002245 particle Substances 0.000 claims description 49
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 229910045601 alloy Inorganic materials 0.000 claims description 27
- 239000000956 alloy Substances 0.000 claims description 27
- 239000011575 calcium Substances 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910000882 Ca alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 241000252233 Cyprinus carpio Species 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 235000010005 Catalpa ovata Nutrition 0.000 description 1
- 240000004528 Catalpa ovata Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Description
【発明の詳細な説明】
本発明は、アルミニウム（Ａそ）又はＡそ合金溶湯中に
金属被覆又は他の表面処理をしない黒鉛粒子を分散する
黒鉛含有Ａそ合金の製造法に係り、特に得られる合金の
４〜３の重量％の黒鉛粒子を分散させるのに好適な潤滑
用黒鉛含有Ａそ鋳造合金の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a graphite-containing A-so alloy, in which graphite particles without metal coating or other surface treatment are dispersed in a molten aluminum (A-so) or an A-so-alloy. The present invention relates to a method for producing lubricating graphite-containing A-cast alloys suitable for dispersing 4-3% by weight of graphite particles in the alloy.
内燃機関における滑り接触構成要素例えば軸受歯車、ピ
ストン、シリンダー、スライダー等には一般に固体潤滑
材を含有した合金が使用されている。Alloys containing solid lubricants are generally used for sliding contact components in internal combustion engines, such as bearing gears, pistons, cylinders, sliders, etc.
これは潤滑油膜が破壊したときに固体潤滑材の自己潤滑
作用によってそれを補なう必要からであり、黒鉛はこの
固体潤滑材として極めて良好であることが知られている
。このため黒鉛を含有した多くの種類の合金が製造され
た。しかし黒鉛粒子を含有する合金の殆んどは粉末捨金
的に製造されたものであり、得られた嫌結品は機械的性
質が劣る上、大形製品の場合鋳造品や鍛造品に比較して
経費がかかると言う欠点がある。ＡＺ又はＡと合金溶濠
中に黒鉛粒子を浮上させることなく分散させる技術とし
て最近までに次のニつの方法が提案された。This is because when the lubricating oil film breaks down, it is necessary to compensate for it with the self-lubricating action of the solid lubricant, and graphite is known to be extremely effective as this solid lubricant. For this reason, many types of alloys containing graphite have been produced. However, most of the alloys containing graphite particles are manufactured using powder metallurgy, and the resulting products have inferior mechanical properties, and in the case of large products, they are inferior to cast or forged products. The disadvantage is that it costs money. The following two methods have recently been proposed as techniques for dispersing graphite particles in AZ or A and alloy moats without floating them.
その一つは特公昭５１一１３９５１２号であり、ニッケ
ル（Ｎｉ）被覆黒鉛粒子とハロゲン化合物との混合粉を
過共晶Ａそ−Ｓｉ合金溶湯中に添加し、櫨梓機により溶
湯に渦を形成して黒鉛粒子を分散させる方法である。ま
た、一つは特豚昭５３一９７２２７号であり金属被覆し
た黒鉛粒子を炭化物形成元素を添加した溶湯中に溶湯を
魔拝しながら直接投入する方法である。さらに一つは特
公昭４５−１３２２４号であり、金属被覆した黒鉛粒子
を搬送ガス中に懸濁させて、ガスと共にＡそ合金溶濠中
に吹き込む方法である。しかしこれらの方法はそのいず
れもが分散する黒鉛粒子の表面に化学鍍金等により金属
被覆することが必須要件となっており、鍍金工程が複雑
なこと及び廃液処理設備が必要なことからコスト高にな
る欠点がある。また鍍金したままの金属被覆黒鉛は表面
が酸化しているために港濠中に投入分散させても溶湯と
の濡れ性が悪〈溶湯表面に浮上するので、黒鉛粒子表面
の清浄化処理が必要となる。本発明の目的は上記の欠点
解消し、金属被覆又は他の表面処理をしない黒鉛粒子を
用いて通常の鋳造条件で黒鉛粒子を殆んど浮上させずに
分散する黒鉛含有Ａ〆合金の製造法を提供することにあ
る。One of them is Japanese Patent Publication No. 51-139512, in which a mixed powder of nickel (Ni)-coated graphite particles and a halogen compound is added to a molten hypereutectic A-Si alloy, and a vortex is created in the molten metal using a sushi machine. This is a method of forming and dispersing graphite particles. One method is disclosed in Tokubuta No. 53-197227, in which metal-coated graphite particles are directly poured into a molten metal to which a carbide-forming element has been added while pouring the molten metal into the molten metal. Another method is disclosed in Japanese Patent Publication No. 45-13224, in which metal-coated graphite particles are suspended in a carrier gas and blown together with the gas into an A-so alloy moat. However, in all of these methods, it is essential to coat the surface of the dispersed graphite particles with metal by chemical plating, etc., and the cost is high because the plating process is complicated and waste liquid treatment equipment is required. There is a drawback. In addition, since the surface of metal-coated graphite is oxidized as it is plated, it has poor wettability with the molten metal even if it is poured into a port moat and dispersed (as it floats to the surface of the molten metal, the surface of the graphite particles must be cleaned) becomes. The object of the present invention is to solve the above-mentioned drawbacks, and to provide a method for producing a graphite-containing A-alloy, which uses graphite particles without metal coating or other surface treatment and disperses them under normal casting conditions with almost no floating of the graphite particles. Our goal is to provide the following.
発明者等はＮｉ被覆した黒鉛粒子がＡ〆落陽中に分散し
（特開昭５１一４５６０３号）、その鰭塊を再溶解して
も黒鉛粒子は浮上せず溶傷中に分散しており、この黒鉛
分散Ａそ合金の組織を顕微鏡により観察した結果銭塊中
に分散している黒鉛粒子には鍍金層が存在していないこ
とを確認した。The inventors discovered that Ni-coated graphite particles were dispersed in the A-glaze sun (Japanese Unexamined Patent Publication No. 51-45603), and that even when the fin mass was remelted, the graphite particles did not float to the surface but were dispersed in the burn wound. As a result of microscopic observation of the structure of this graphite-dispersed A-so alloy, it was confirmed that there was no plating layer in the graphite particles dispersed in the coin coin.
一方Ａ〆溶傷中に金属被覆しない黒鉛粒子を投入したと
ころ２〜３重量％までは黒鉛粒子が分散するが、更に黒
鉛粒子の投入を続けると既に分散していた黒鉛粒子まで
港湯表面に浮上しかつ溶湯表面には多くの酸化物の生成
が見られた。これらのことから発明者等はカルシウム（
Ｃａ）をＡそ又はＡそ合金溶湯に添加してＡその酸化を
防止して、得られる合金の４〜３の重量％の黒鉛粒子を
前記溶傷中に分散有し得ることを見出した。本発明はア
ルミニウム又はアルミニウム合金の溶湯に、カルシウム
を０．０１〜１の重量％含まれるように添加し得られる
合金に対し４〜３の重量％の黒鉛粒子を上記溶湯に投入
鷹拝して分散させ、溶湯を冷却凝固させることを特徴と
する潤滑用黒鉛含有アルミニウム合金の製造法に関する
。On the other hand, when graphite particles that are not coated with metal are added to the melting wound in A., the graphite particles are dispersed up to 2 to 3% by weight, but if the graphite particles are continued to be added, the graphite particles that were already dispersed will also reach the surface of the port water. Many oxides were observed to float on the surface of the molten metal. Based on these facts, the inventors decided to use calcium (
It has been found that by adding Ca) to the molten metal of A or A to prevent its oxidation, it is possible to have 4-3% by weight of the resulting alloy of graphite particles dispersed in the flaws. In the present invention, calcium is added to a molten metal of aluminum or an aluminum alloy so as to contain 0.01 to 1% by weight, and graphite particles of 4 to 3% by weight are added to the molten metal based on the resulting alloy. The present invention relates to a method for producing a graphite-containing aluminum alloy for lubricating, which comprises dispersing the molten metal and cooling and solidifying the molten metal.
分散させる黒鉛粒子の量は得られる合金に対し４〜３の
重量％が乾式摩擦条件下で使用する場合の限界である。The amount of graphite particles to be dispersed is 4-3% by weight based on the resulting alloy, which is the limit when used under dry friction conditions.
４重量％未満では十分な潤滑効果が得られず、３の重量
％を越えると耐摩耗性及び機械的強度が低下する。黒鉛
粒子の大きさは５０ムｍ以上が好ましい。５０山ｍ未満
であると摺動に際して黒鉛が凝着粉として摩擦系外へは
き出されてしまい黒鉛の潤滑効果が低下することがある
。If it is less than 4% by weight, a sufficient lubricating effect cannot be obtained, and if it exceeds 3% by weight, wear resistance and mechanical strength will decrease. The size of the graphite particles is preferably 50 mm or more. If the diameter is less than 50 m, graphite may be expelled as adhesive powder to the outside of the friction system during sliding, and the lubricating effect of graphite may deteriorate.
使用する黒鉛は天然又は人造のいずれでもよく制限しな
い。黒鉛繊維の使用も可能である。溶湯に用いるＡそ合
金は錫（Ｓｎ）、銅（Ｃｕ）、鈴（Ｐｂ）、シリコン（
Ｓｉ）及び亜鉛（Ｚｎ）から選ばれる少なくとも１種を
含むことが望ましい。The graphite used may be natural or artificial without any limitations. It is also possible to use graphite fibers. The A-alloys used for the molten metal include tin (Sn), copper (Cu), copper (Pb), and silicon (
It is desirable to contain at least one selected from Si) and zinc (Zn).
その理由はＡ〆−Ｓｎ系、Ａそ−Ｃｕ系、Ａそ−Ｐｂ系
、Ａそ−Ｓｉ系、Ａそ−Ｚｎ系又はこれらの二九もしく
は三元合金は従釆から軸受等に広く用いられており、こ
れに黒鉛粒子を分散させれば利用価値が一段と高まるか
らである。望ましい組成はＡ〆−Ｓｎ系はＳｎｏ．５〜
１０重量％、Ａそ−Ｃｕ系はＣｕｏ．５〜５重量％、Ａ
〆−Ｐｂ系はＰｂｏ．５〜６重量％、Ａそ‐Ｓｉ系はＳ
ｉｏ．５〜２５重量％及びＡ夕−Ｚｎ系はＺｎｏ．５〜
１の重量％である。Ａ〆又はＡと合金中に黒鉛粒子を４
〜３の重量％分散含有させる為に添加するＣａの最大含
有量は得られる合金に対して１の重量％であり、１の重
量％を越えると得られる鋳造合金の機械的強度の低下等
の好ましくない結果をもたらす。The reason for this is that A-Sn, A-Cu, A-Pb, A-Si, A-Zn, or ternary or ternary alloys of these are widely used in bearings, etc. This is because dispersing graphite particles in this will further increase its utility value. A desirable composition is A〆-Sn system is Sno. 5～
10% by weight, Aso-Cu type is Cuo. 5-5% by weight, A
〆-Pb system is Pbo. 5 to 6% by weight, Aso-Si type is S
io. 5 to 25% by weight and A-Zn system is Zno. 5～
1% by weight. 4 graphite particles in A〆 or alloy with A
The maximum content of Ca that can be added to disperse up to 3% by weight is 1% by weight based on the resulting alloy, and if it exceeds 1% by weight, it may cause a decrease in the mechanical strength of the resulting cast alloy. lead to undesirable results.
最小含有量は得られる合金に対して０．０１重量％であ
る。０．０１重量％未満であると黒鉛粒子が溶湯の表面
に浮上したり分散が不均一となる。The minimum content is 0.01% by weight, based on the alloy obtained. If it is less than 0.01% by weight, graphite particles may float to the surface of the molten metal or become unevenly dispersed.
Ｃａの最適含有量は得られる合金に対して０．０５〜１
．の重量％である。Ｃａの添加は黒鉛を落陽に投入する
前の方が望ましいが、黒鉛投入と同時又は黒鉛投入後で
も良い。黒鉛粒子を綾湯中により良く分散させるには、
溶湯を蝿拝しながら麹梓によって生じる渦の中少しずつ
投入してゆくのが良い。Ａ〆又はＡそ合金の溶湯の温度
はＡそ又はＡそ合金マトリックスの液相線温度よりも５
０ｑｏ以上高く９００ｑｏ以下とすることが好ましい。
液相線温度より５０℃以上の温度にしておかないと溶湯
の流動性が低下し、巣等の鋳造欠陥が発生し易い。一方
９００ｏｏより高くなると黒鉛粒子が浮上し易くなるか
らである。黒鉛粒子を分散させた溶湯を冷却凝固する際
に４００〜１０００ｋ９／地の圧力で加圧することが好
ましい。The optimum content of Ca is 0.05 to 1 for the resulting alloy.
．． % by weight. Although it is preferable to add Ca before graphite is added to the Rakuyo, it may be added at the same time as or after the graphite is added. To better disperse graphite particles in Ayayu,
It is best to pour the molten metal little by little into the whirlpool created by the koji azusa. The temperature of the molten metal of A〆 or Aso alloy is 55% lower than the liquidus temperature of the Aso or Aso alloy matrix.
It is preferable that it is higher than 0 qo and lower than 900 qo.
If the temperature is not kept at 50° C. or more above the liquidus temperature, the fluidity of the molten metal will decrease and casting defects such as cavities are likely to occur. On the other hand, if the temperature is higher than 900 oo, graphite particles tend to float. When cooling and solidifying the molten metal in which graphite particles are dispersed, it is preferable to pressurize it at a pressure of 400 to 1000 k9/kg.
加圧することにより溶湯中のガス抜けを十分にし溶湯と
鋳型間の熱伝導が向上して凝固に要する時間が短縮され
、鋳造組織が微細化されると共に黒鉛粒子の浮上が抑制
され、銭魂中の内部欠陥も一段と小になる。４００ｋ９
／鮒未満では、ガス抜け等の加圧による効果が不十分で
あり、１０００ｋ９／仇を越えると加圧装置が大型化す
るし、より以上の効果は期待出来ない。By pressurizing, the gas in the molten metal is sufficiently released, the heat conduction between the molten metal and the mold is improved, the time required for solidification is shortened, the casting structure is made finer, and the floating of graphite particles is suppressed, making it possible to improve the Internal defects will also become smaller. 400k9
If the pressure is less than 1000k9/carp, the effect of pressurization such as degassing will be insufficient, and if it exceeds 1000k9/carp, the pressurizing device will become large and no further effects can be expected.
比較例 １
黒鉛ルツボを用いて純Ａそ７００夕を溶融し、７５０℃
に保持した。Comparative Example 1 700 ml of pure A was melted in a graphite crucible and heated to 750°C.
was held at
その熔湯をアルミナ榛を用いて櫨拝しながら黒鉛粒子１
７７〜２５０山ｍ（８０〜６０メッシュ）を１重量％ず
つ添加し、分散性を検討した。その結果、黒鉛は２〜３
重量％まで溶湯中に分散した。しかし、それ以上の黒鉛
量を連続的に投入添加すると溶湯中に分散していた黒鉛
まで溶傷表面上に浮上し、３重量％以上の黒鉛粒子を分
散することはできなかった。冷却後黒鉛の分散した鏡塊
を第１図ａに示す。実施例 １
Ｃａ添加による黒鉛粒子の分散性に及ぼす影響について
検討するため、黒鉛ルッボを用いて純Ａそ７００夕を熔
融し７５０ｏｏに保持したち、Ｃａを添加し、それらの
溶湯をアルミナ棒を用いて澄拝しながら黒鉛粒子１７７
〜２５０山ｍ（６０〜８０メッシュ）を１重量％ずつ添
加して行き３の重量％まで溶湯中に投入した。Graphite particles 1 are poured into the molten water using an alumina bar.
77 to 250 mesh (80 to 60 mesh) was added in an amount of 1% by weight, and the dispersibility was examined. As a result, graphite is 2 to 3
Dispersed in the molten metal up to % by weight. However, if a larger amount of graphite was added continuously, even the graphite dispersed in the molten metal floated to the surface of the flaw, making it impossible to disperse graphite particles of 3% by weight or more. After cooling, the mirror mass with dispersed graphite is shown in Figure 1a. Example 1 In order to investigate the effect of Ca addition on the dispersibility of graphite particles, 700 ml of pure A was melted using a graphite rubbo and maintained at 750 ml, Ca was added, and the molten metal was passed through an alumina rod. Graphite particles 177
~250 mesh (60 to 80 mesh) was added in 1% by weight increments until it reached 3% by weight.
その結果、Ｃａの１重量％を添加した場合に黒鉛粒子は
溶湯中に分散し表面に浮上しなかった。それら黒鉛浮上
防止効果がある元素を的加した黒鉛粒子分散鏡塊につい
て再溶解した結果、溶傷中の黒鉛粒子は浮上することな
く分散した。実施例・２
黒鉛ルッボを用いて純Ａ夕を７００タ溶融し、７５０℃
に保持した。As a result, when 1% by weight of Ca was added, graphite particles were dispersed in the molten metal and did not float to the surface. As a result of remelting the graphite particle-dispersed specular mass to which the elements that have an effect of preventing graphite floating were added, the graphite particles in the flaw were dispersed without floating. Example 2 Melt 700 degrees of pure A powder using graphite Rubbo and heat to 750℃
was held at
その溶湯を蝿拝しながら１７７〜２５０ムｍ（６０〜８
０メッシュ）の黒鉛粒子を１の重量％まで投入添加し、
熔傷表面上に黒鉛粒子を浮上させた後にＣａを１重量％
添加溶解した結果、溶湯表面上に浮上していた黒鉛粒子
は溶湯中に分散した。冷却後の綾塊は第１図ｂに示すよ
うに黒鉛の分離浮上は見られない。実施例 ３
黒鉛ルッボを用いてＡそ−２の重量％Ｓｉ合金を溶傷し
、８５０ｏｏに保持した。177~250mm (60~8mm) while worshiping the molten metal
0 mesh) graphite particles were added up to 1% by weight,
1% by weight of Ca after floating graphite particles on the surface of the scar.
As a result of the addition and dissolution, the graphite particles floating on the surface of the molten metal were dispersed into the molten metal. After cooling, the twill mass shows no separation and floating of graphite, as shown in Figure 1b. Example 3 A so-2 wt% Si alloy was melted using a graphite rubbo and maintained at 850 oo.
黒鉛粒子は粒度１７７〜２５０仏ｍ（６０〜８０メッシ
ュ）を用いて、黒鉛粒子が港傷表面上に浮上せず３の重
量％まで分散するのに必要なＣａの添加量を求めた。そ
の結果を第１表に示した。第１表 黒鉛粒子の分散可能
量（重量％）実施例 ４
黒、鉛ルツポを用いてＡＺ一８重量％Ｓｎ−０．５重量
％Ｃａ合金を溶融し、７０ぴ０に保持した。Using graphite particles with a particle size of 177 to 250 French m (60 to 80 mesh), the amount of Ca added necessary for the graphite particles to disperse up to 3% by weight without floating on the surface of the port wound was determined. The results are shown in Table 1. Table 1: Dispersible amount of graphite particles (wt%) Example 4 AZ-8 wt% Sn-0.5 wt% Ca alloy was melted using a black-lead melting pot and maintained at 70% by weight.
その溶湯中に粒度１７７〜２５０ムｍ（６０〜８０メッ
シュ）の黒鉛を２の重量％添加投入し、黒鉛分散Ａそ合
金溶湯を作成した。この溶湯を６００ｋ９／めで加圧凝
固した鏡塊の断面を観察した結果、黒鉛粒子は鉾塊内に
分散し、鋳造欠陥も観察されなかった。実施例 ５
黒鉛ルツボを用いてＡクー１２重量％Ｓｉｏ．５重量％
Ｃａ合金７００夕を溶濠し、７００ｑｏに保持した。2% by weight of graphite having a particle size of 177 to 250 mm (60 to 80 mesh) was added to the molten metal to prepare a molten graphite-dispersed alloy A. As a result of observing the cross section of the mirror block obtained by pressurizing and solidifying this molten metal at 600 k9/m, it was found that graphite particles were dispersed within the block and no casting defects were observed. Example 5 Using a graphite crucible, Aku 12% by weight Sio. 5% by weight
700 qo of Ca alloy was melted and maintained at 700 qo.
その溶湯をアルミナ棒を用いて縄拝しながら、直径１２
．５りｍ×長さ６帆の黒鉛繊維（呉羽化学工業（株）製
、商品名クレハカーボンフアィバーチョツプ）を２重量
％ずつ添加し、黒鉛繊維の分散性を検討した。その結果
、黒鉛繊維は得られる合金に対して２０重量％まで落陽
中の分散可能であった。またこれら黒鉛繊維分散銭塊は
再溶融しても溶湯中の黒鉛繊維は浮上することなく分散
する。以上の実施例で述べたように、本発明の製造法に
よれば、黒鉛表面への金属被覆又は他の前処理等を省く
ことができ、かつ黒鉛粒子又は黒鉛繊維を鏡魂中に均一
に分散しかつ黒鉛の浮上のない黒鉛分散アルミニウム鋳
造合金が得られる。また得られた黒鉛分散アルミニウム
鋳造合金は再熔解しても黒鉛が浮上しない効果を有する
。図面の簡単な説明第１図は銭塊の断面組織写真で、ａ
は単にＡそ溶傷中に黒鉛粒子を分散冷却させた銭塊の写
真、ｂは本発明の黒鉛含有アルミニウム合金の製造法に
よって得られた錆塊の写真である。While using the molten metal as a rope using an alumina rod,
．． Graphite fibers (manufactured by Kureha Chemical Industry Co., Ltd., trade name: Kureha Carbon Fiber Chop) measuring 5 mm x 6 sails were added at 2% by weight each, and the dispersibility of the graphite fibers was examined. As a result, graphite fibers could be dispersed in the setting sun in an amount of up to 20% by weight based on the resulting alloy. Further, even if these graphite fiber dispersed coin coins are remelted, the graphite fibers in the molten metal are dispersed without floating. As described in the above examples, according to the manufacturing method of the present invention, metal coating or other pretreatment on the graphite surface can be omitted, and graphite particles or graphite fibers can be uniformly distributed in the mirror. A graphite-dispersed aluminum casting alloy is obtained which is dispersed and free of graphite floating. Furthermore, the obtained graphite-dispersed aluminum casting alloy has the effect that graphite does not float even if it is remelted. Brief explanation of the drawings Figure 1 is a photograph of the cross-sectional structure of a coin coin.
A is simply a photograph of a coin lump with graphite particles dispersed and cooled in the flaw, and b is a photograph of a rust lump obtained by the method for producing a graphite-containing aluminum alloy of the present invention.
寒１図cold 1 picture
Claims (1)
シウム０．０１〜１０重量％含まれるように添加し得ら
れる合金に対し４〜３０重量％の黒鉛粒子を上記溶湯に
投入撹拌して分散させ、溶湯を冷却凝固させることを特
徴とする潤滑用黒鉛含有アルミニウム合金の製法。1 Add graphite particles to a molten aluminum or aluminum alloy so that it contains 0.01 to 10% by weight of calcium, then add 4 to 30% by weight of graphite particles to the resulting alloy by stirring and dispersing the molten metal, and cool the molten metal. A method for producing a graphite-containing aluminum alloy for lubricating, which is characterized by solidifying it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8871781A JPS6027744B2 (en) | 1981-06-08 | 1981-06-08 | Manufacturing method of graphite-containing aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8871781A JPS6027744B2 (en) | 1981-06-08 | 1981-06-08 | Manufacturing method of graphite-containing aluminum alloy |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP526585A Division JPS60187637A (en) | 1985-01-16 | 1985-01-16 | Production of graphite-containing aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57203732A JPS57203732A (en) | 1982-12-14 |
| JPS6027744B2 true JPS6027744B2 (en) | 1985-07-01 |
Family
ID=13950650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8871781A Expired JPS6027744B2 (en) | 1981-06-08 | 1981-06-08 | Manufacturing method of graphite-containing aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6027744B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6383054U (en) * | 1986-11-18 | 1988-05-31 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138041A (en) * | 1983-12-27 | 1985-07-22 | Ibiden Co Ltd | Ceramic-metal composite body and its manufacture |
-
1981
- 1981-06-08 JP JP8871781A patent/JPS6027744B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6383054U (en) * | 1986-11-18 | 1988-05-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57203732A (en) | 1982-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4207096A (en) | Method of producing graphite-containing copper alloys | |
| Krishnan et al. | The UPAL process: a direct method of preparing cast aluminium alloy-graphite particle composites | |
| US3600163A (en) | Process for producing at least one constituent dispersed in a metal | |
| US4383970A (en) | Process for preparation of graphite-containing aluminum alloys | |
| US4946647A (en) | Process for the manufacture of aluminum-graphite composite for automobile and engineering applications | |
| Krishnan et al. | Modification of Al–Si alloy melts containing graphite particle dispersions | |
| AU742692B2 (en) | Aluminium-bismuth bearing alloy and methods for its continuous casting | |
| Kim et al. | Tribological properties of centrifugally cast copper alloy-graphite particle composite | |
| JPS60187637A (en) | Production of graphite-containing aluminum alloy | |
| JPS6027744B2 (en) | Manufacturing method of graphite-containing aluminum alloy | |
| JP4121733B2 (en) | Method for producing graphite-containing aluminum alloy and sliding member | |
| JPS6316456B2 (en) | ||
| US3827882A (en) | High lead aluminium alloy | |
| US4432936A (en) | Method for adding insoluble material to a liquid or partially liquid metal | |
| Liu et al. | Relationship between microstructure and dry wear behavior of compo-cast nano-SiC (p)+ micro-Gr (p)/Zn-35Al-1.2 Mg-0.2 Sr composite under different chilling conditions. | |
| Daver et al. | Aluminium P/M parts-materials, production and properties | |
| US3720507A (en) | Copper-lead alloy | |
| CN106591640B (en) | A kind of wear-resistant aluminum alloy | |
| US3894957A (en) | Copper-lead alloys for lubricants and bearings | |
| CN1140766A (en) | High temperature low-expansion zinc-base abrasion-resistant alloy | |
| Moosa et al. | Effect of rare earth addition on wear properties of aluminum alloy-rice husk ash/yttrium oxide hybrid composites | |
| Kota et al. | Characterization of microstructure and wear behavior of nickel modified Zn-27% Al alloy casting | |
| Kim et al. | Wear properties and effect of molds on microstructure of graphite reinforced copper alloy composites made by centrifugal casting | |
| JP2735848B2 (en) | Graphite dispersed Co-based alloy | |
| Moustafa | Casting of graphitic Al–Si base composites |