JPS63165058A - Metal dripping type casting method - Google Patents
Metal dripping type casting methodInfo
- Publication number
- JPS63165058A JPS63165058A JP30867486A JP30867486A JPS63165058A JP S63165058 A JPS63165058 A JP S63165058A JP 30867486 A JP30867486 A JP 30867486A JP 30867486 A JP30867486 A JP 30867486A JP S63165058 A JPS63165058 A JP S63165058A
- Authority
- JP
- Japan
- Prior art keywords
- semi
- molten metal
- electrodes
- pair
- metal pool
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 53
- 238000005266 casting Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 22
- 239000000654 additive Substances 0.000 claims description 21
- 230000000996 additive effect Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 230000004907 flux Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract 3
- 238000003756 stirring Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、金属の滴下式鋳造方法、特に、鋳造物中に
耐摩耗性等を向上させるための粒状添加材を均一に分散
させることができる、金属の滴下式鋳造方法に関するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drop casting method for metal, in particular, to a method for uniformly dispersing granular additives to improve wear resistance etc. in a cast product. The present invention relates to a drop casting method for metal.
通常、金属製品の中間素材である、鋳塊、鋳片（以下鋳
造物と云う）は、溶融金属を鋳型に注入し、凝固させる
ことによって製造されている。Generally, ingots and slabs (hereinafter referred to as castings), which are intermediate materials for metal products, are manufactured by pouring molten metal into a mold and solidifying it.
しかし、この方法では完全に溶けた金属を鋳型に赳込む
ので、製造される鋳造物の凝固組織の結晶粒径は比較的
大きい。このために、機械的特性の確保を目的として、
鋳造物に大圧下を加えると鋳造物に割れが発生する。従
って、圧下刃を多数回にわけて鋳造物に付与する必要が
あるが、これは、処理に長時間を要し、また必要な熱エ
ネルギーも多くなりコスト高となる。However, in this method, completely molten metal is poured into a mold, so the crystal grain size of the solidified structure of the manufactured casting is relatively large. For this purpose, in order to ensure mechanical properties,
If a large reduction is applied to a casting, cracks will occur in the casting. Therefore, it is necessary to apply the reduction blade to the casting in multiple steps, but this requires a long time for processing and also requires a large amount of thermal energy, resulting in high costs.
そこで、上述した問題点を解決する方法として、ＶＡＤ
ＥＲ（Ｖａｃｕｕｍ Ａｒｃ Ｄｏｕｂｌｅ Ｅｌｅｃ
ｔｒｏｄｅＲｅＢｅｌｔｉｎｇ）法が特開昭５５−１６
５２７１号公報に開示されている。Therefore, as a method to solve the above-mentioned problems, VAD
ER (Vacuum Arc Double Elec
trodeReBelting) method was published in Japanese Patent Application Publication No. 55-16.
It is disclosed in Japanese Patent No. 5271.
以下にＶＡＤＲＲ法を図面を参照しながら筒単に説明す
る。第３図に示すように、製造する鋳造物と同一組成の
金属からなる１対の電極１間にアーク２を発生させて電
極１０対向端部を、減圧下で連続的（＝溶融させる。こ
の溶融金属の液滴３は回転する鋳型４内に落下し、凝固
して鋳造物５が製造される。The VADRR method will be briefly explained below with reference to the drawings. As shown in FIG. 3, an arc 2 is generated between a pair of electrodes 1 made of a metal having the same composition as the casting to be produced, and the opposing ends of the electrodes 10 are continuously melted under reduced pressure. A droplet 3 of molten metal falls into a rotating mold 4 and solidifies to produce a casting 5.
溶融金属の液滴３は、電極１から鋳型４内に落下する過
程で若干冷却されて半溶融状態となる。The molten metal droplet 3 is slightly cooled down to a semi-molten state in the process of falling from the electrode 1 into the mold 4.
このため、鋳型３内の半溶融金属溜り６は、固液共存相
が均一に存在する状態で凝固するので、鋳造物５の凝固
組織の結晶粒径は小さい。従って、大圧下を加えても鋳
造物（＝割れは発生しない。Therefore, the semi-molten metal reservoir 6 in the mold 3 solidifies in a state where the solid-liquid coexistence phase exists uniformly, so that the crystal grain size of the solidified structure of the casting 5 is small. Therefore, even if a large reduction is applied, no cracks will occur in the casting.
ＶＡＤＥＲ法によって、例えば、研削機の主軸用スリー
ブを製造する場合、高温での耐摩耗性、低熱伝導性およ
び割振性の向上作用を鋳造物に付与する必要がある。こ
れには、鋳造物に前述した各種性質の向上作用を付与す
ることができる粒状添加材を、鋳造物中に均一ζ；分散
させることが考えられる。しかし、これを容易且つ確実
に行なえる方法はまだ提案されていない。When manufacturing, for example, a sleeve for the main shaft of a grinding machine by the VADER method, it is necessary to impart to the casting the effects of improving wear resistance at high temperatures, low thermal conductivity, and splitting properties. One way to do this is to uniformly disperse granular additives, which can impart the above-mentioned properties to the casting, into the casting. However, no method has yet been proposed that allows this to be done easily and reliably.
従って、この発明の目的は、高温での耐摩耗性等の向上
作用を付与することができる粒状添加材を、ＶＡＤＥＲ
法により製造される鋳造物中に容易に均一に分散させる
ことができる、金属の滴下式鋳造方法を提供することに
ある。Therefore, an object of the present invention is to add a particulate additive that can improve wear resistance at high temperatures to VADER.
An object of the present invention is to provide a method for dropping metal that can be easily and uniformly dispersed in a casting produced by the method.
この発明は、鋳型の上方に１対の電極を設け、前記１対
の電極間にアークを発生させ、前記アークの熱によって
前記１対の電極の先端部を溶融させ、七の液滴を前記鋳
型内に落下させて前記鋳型内に半溶融金属溜りを形成し
、そして、前記半溶融金属溜りを凝固させて鋳造物を製
造することからなる、金属の滴下式鋳造方法において、
前記鋳造物に高温での耐摩耗性等の向上作用を付与する
ための粒状添加材を小径金属筒内に充填したものからな
るコアドワイヤを前記アーク中に供給し、前記添加材を
前記アークの熱によって加熱した後、前記添加材を前記
半溶融金属溜り上に落下させ、前記１対の電極の少なく
とも一方と、前記半溶融金属溜りとの間に直流電流（Ｉ
１）を通電し、そして、前記電流（工、）と、 前記１
対の電極間を流れる電流（Ｉ２）による磁束（Ｂ）とに
より生じる電磁力ＣＦ）によって、前記半溶融金属溜り
を攪拌し、かくして、前記半溶融金属溜り、中に前記添
加材を均一（＝分散させることに特徴を有するものであ
る。In this invention, a pair of electrodes is provided above the mold, an arc is generated between the pair of electrodes, and the tips of the pair of electrodes are melted by the heat of the arc. A drip casting method for metal, comprising dropping the metal into a mold to form a semi-molten metal pool in the mold, and solidifying the semi-molten metal pool to produce a casting,
A cored wire consisting of a small diameter metal cylinder filled with a granular additive for imparting an effect of improving wear resistance at high temperatures to the casting is supplied into the arc, and the additive is absorbed by the heat of the arc. The additive material is dropped onto the semi-molten metal pool, and a direct current (I) is applied between at least one of the pair of electrodes and the semi-molten metal pool.
1) energize, and the current (), and the 1
The semi-molten metal pool is stirred by the electromagnetic force CF generated by the magnetic flux (B) caused by the current (I2) flowing between the pair of electrodes, and the additive material is uniformly (= It is characterized by its dispersion.
次に、この発明の、金属の滴下式鋳造方法の一実施態様
を図面を参照しながら説明する。Next, an embodiment of the metal drop casting method of the present invention will be described with reference to the drawings.
第１図は、この発明の、金属の滴下式鋳造方法の一実施
態様を示す断面図である。FIG. 1 is a cross-sectional view showing one embodiment of the metal drop casting method of the present invention.
第１図において、１対の電極１は、回転する鋳型４の上
方に間隔をあけて設けられており、先端部の溶融速度に
応じて互いに接近する方向に移動する。電極１は、製造
する鋳造物と同一組成の金属、例えば、ステンレスから
なっている。１対の電極１間には、アーク２を発生させ
るための直流電源（図示せず）が接続されている。１対
の電極１の先端部は、アーク熱によって溶融する。電極
１は、通常の棒状電極の他、粒状の電極材料をこれと同
一材料からなる金属筒内に充填したものであっても良い
。In FIG. 1, a pair of electrodes 1 are provided at a distance above a rotating mold 4, and move toward each other in accordance with the melting speed of the tips. The electrode 1 is made of a metal having the same composition as the casting to be manufactured, for example, stainless steel. A DC power source (not shown) for generating an arc 2 is connected between the pair of electrodes 1 . The tips of the pair of electrodes 1 are melted by arc heat. The electrode 1 may be a normal rod-shaped electrode, or may be a metal cylinder made of the same material filled with granular electrode material.
アーク２内に供給されるコアドワイヤ７は、第２図に示
すように、電極１と同一組成の金属からなる小径の筒８
内に粒状の添加材９を充填したものからなっている。添
加材９は、ステンレス等からなる鋳造物中に分散して添
加されることによって、鋳造物の高温での耐摩性、低熱
伝導性、制振性等を向上させる作用會有する。添加材９
は、Ａｌ４２０１． Ｓｉ、Ｉ４． ＷＣ、５ｉ０２
、 ＳｉＣ等のうちの少なくとも１種からなってい
る。添加材９は筒８内に充填されているので、アーク２
内での滞在時間が長くなって十分に活性化する結果、鋳
型４内の半溶融金属との濡れ性が良くなり、しかも、添
加材９の定量供給が容易に行なえる。The cored wire 7 supplied into the arc 2 is inserted into a small diameter cylinder 8 made of metal having the same composition as the electrode 1, as shown in FIG.
The inside of the container is filled with granular additive material 9. The additive material 9 has the effect of improving the high-temperature wear resistance, low thermal conductivity, vibration damping properties, etc. of the casting by being dispersed and added to the casting made of stainless steel or the like. Additive material 9
is Al4201. Si, I4. WC, 5i02
, SiC, etc. Since the additive material 9 is filled in the cylinder 8, the arc 2
As a result of the longer residence time in the mold and sufficient activation, the wettability with the semi-molten metal in the mold 4 improves, and furthermore, the additive material 9 can be easily supplied in a fixed amount.
直流電源１０は、一方の電極１と半溶融金属溜り６との
間に直流電流を断続的に通電すみ。The DC power supply 10 intermittently supplies a DC current between one electrode 1 and the semi-molten metal reservoir 6.
上述した、この発明の、金属の滴下式鋳造方法の一実施
態様によれば、次のようにして、高温での耐摩性、低熱
伝導性、割振性等に優れた鋳造物が製造される。According to one embodiment of the above-mentioned drop casting method of metal according to the present invention, a cast product having excellent high-temperature wear resistance, low thermal conductivity, allocatability, etc. is manufactured in the following manner.
１対の電極１間に第１図中矢印方向に電流（Ｉ１）を通
電して１対の電極１間に、減圧下でアーク２を発生させ
る。１対の電極１の先端部はアーク熱によって溶融し、
その液滴３は鋳型４内に落下して半溶融金属溜り６を形
成する。アーク２内に供給されたコアドワイヤ７の筒８
は、アーク熱によって溶融し、そして、筒８内の添加材
９は加熱きれて鋳型４内の半溶融金属溜り６上に落下す
る。A current (I1) is passed between the pair of electrodes 1 in the direction of the arrow in FIG. 1 to generate an arc 2 between the pair of electrodes 1 under reduced pressure. The tips of the pair of electrodes 1 are melted by arc heat,
The droplet 3 falls into the mold 4 and forms a semi-molten metal reservoir 6. Cylinder 8 of cored wire 7 supplied into arc 2
is melted by the arc heat, and the additive material 9 in the cylinder 8 is completely heated and falls onto the semi-molten metal reservoir 6 in the mold 4.
添加材９は十分（−加熱されているので、半溶融金属と
の濡れ性は良好である。Since the additive 9 has been sufficiently heated, its wettability with the semi-molten metal is good.
直流電源１０から直流電流（Ｉ１）を断続的に電極１と
半溶融金属溜り６との間に通電すると、１対の電極１間
の電流（工２）による磁束（Ｂ）と前記電流（■１）と
によって、半溶融金属溜り６には電磁力（Ｆ）が断続的
に作用する。この結果、半溶融金属溜り６は攪拌されて
、添加材９は半溶融金属中に均一に分散する。When a DC current (I1) is intermittently applied between the electrode 1 and the semi-molten metal reservoir 6 from the DC power supply 10, the magnetic flux (B) due to the current (step 2) between the pair of electrodes 1 and the current (■ 1), the electromagnetic force (F) acts intermittently on the semi-molten metal reservoir 6. As a result, the semi-molten metal pool 6 is stirred and the additive material 9 is uniformly dispersed in the semi-molten metal.
以上説明したように、この発明によれば、高温での耐摩
耗性、低熱伝導性および割振性の向上作用を付与するこ
とができる粒状添加材を、ＶＡＤＥＲ法によって製造さ
れる鋳造物中に容易に均一に分散させることができると
いった有用な効果がもたらされる。As explained above, according to the present invention, granular additives capable of imparting the effects of improving wear resistance at high temperatures, low thermal conductivity, and splitting properties can be easily incorporated into castings produced by the VADER method. This brings about the useful effect of being able to uniformly disperse the particles.
第１図は、この発明の、金属の滴下式鋳造方法の一実施
態様を示す断面図、第２図は、コアドヮイヤの断面図、
第３図は、ＶＡＤＥＲ法の説明図である。図面において
、
１・・・電極、 ２・・・アーク、３・・
・電極の液滴、 ４・パ鋳型、５・・・鋳造物、
６・・・半溶融金属溜り、７・・・コアド
ワイヤ、 ８・・・筒、９・・・添加材、
１０・・・直流電源。FIG. 1 is a sectional view showing an embodiment of the metal drop casting method of the present invention, FIG. 2 is a sectional view of a core door,
FIG. 3 is an explanatory diagram of the VADER method. In the drawings, 1...electrode, 2...arc, 3...
・Electrode droplet, 4. Pa mold, 5... Casting,
6... Semi-molten metal reservoir, 7... Cored wire, 8... Cylinder, 9... Additive material,
10...DC power supply.
Claims (1)
ークを発生させ、前記アークの熱によって前記１対の電
極の先端部を溶融させ、その液滴を前記鋳型内に落下さ
せて前記鋳型内に半溶融金属溜りを形成し、そして、前
記半溶融金属溜りを凝固させて鋳造物を製造することか
らなる、金属の滴下式鋳造方法において、 前記鋳造物に高温での耐摩耗性等の向上作用を付与する
ための粒状添加材を小径金属筒内に充填したものからな
るコアドワイヤを前記アーク中に供給し、前記添加材を
前記アークの熱によって加熱した後、前記添加材を前記
半溶融金属溜り上に落下させ、前記１対の電極の少なく
とも一方と、前記半溶融金属溜りとの間に直流電流（Ｉ
＿１）を通電し、そして、前記電流（Ｉ＿１）と、前記
１対の電極間を流れる電流（Ｉ＿２）による磁束（Ｂ）
とにより生じる電磁力（Ｆ）によって、前記半溶融金属
溜りを攪拌し、かくして、前記半溶融金属溜り中に前記
添加材を均一に分散させることを特徴とする、金属の滴
下式鋳造方法。[Claims] A pair of electrodes is provided above the mold, an arc is generated between the pair of electrodes, the tips of the pair of electrodes are melted by the heat of the arc, and the droplets are melted. A drip casting method for metal, comprising dropping the metal into the mold to form a semi-molten metal pool in the mold, and solidifying the semi-molten metal pool to produce a casting, comprising: A cored wire consisting of a small-diameter metal cylinder filled with a granular additive to improve wear resistance at high temperatures, etc. was supplied into the arc, and the additive was heated by the heat of the arc. After that, the additive material is dropped onto the semi-molten metal puddle, and a direct current (I) is applied between at least one of the pair of electrodes and the semi-molten metal puddle.
_1) is energized, and magnetic flux (B) is generated by the current (I_1) and the current (I_2) flowing between the pair of electrodes.
A dropping casting method for metal, characterized in that the semi-molten metal pool is stirred by an electromagnetic force (F) generated by the above, and the additive material is uniformly dispersed in the semi-molten metal pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30867486A JPS63165058A (en) | 1986-12-26 | 1986-12-26 | Metal dripping type casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30867486A JPS63165058A (en) | 1986-12-26 | 1986-12-26 | Metal dripping type casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63165058A true JPS63165058A (en) | 1988-07-08 |
Family
ID=17983919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30867486A Pending JPS63165058A (en) | 1986-12-26 | 1986-12-26 | Metal dripping type casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63165058A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017003337A (en) * | 2015-06-08 | 2017-01-05 | 大同特殊鋼株式会社 | Wettability test device |
-
1986
- 1986-12-26 JP JP30867486A patent/JPS63165058A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017003337A (en) * | 2015-06-08 | 2017-01-05 | 大同特殊鋼株式会社 | Wettability test device |
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