JPH02229649A - Method of casting from molten metal - Google Patents
Method of casting from molten metalInfo
- Publication number
- JPH02229649A JPH02229649A JP5079789A JP5079789A JPH02229649A JP H02229649 A JPH02229649 A JP H02229649A JP 5079789 A JP5079789 A JP 5079789A JP 5079789 A JP5079789 A JP 5079789A JP H02229649 A JPH02229649 A JP H02229649A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- die
- mold
- flow down
- flow
- 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 45
- 238000000034 method Methods 0.000 title claims description 13
- 238000005266 casting Methods 0.000 title claims description 7
- 238000005204 segregation Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 7
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は溶融金属を複数個の出湯ノズルから流下させて
鋳込むことによりビレットを製造する溶融金属よりの鋳
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for casting molten metal to produce a billet by casting the molten metal down from a plurality of tapping nozzles.
［従来の技術と問題点コ
通常、ビレットの製造方法としては、（１）鋳型に溶融
金属を注入し、インゴットを製造し、熱間加工を加える
方法、（２）いわゆる、連続鋳造法により製造する方法
があるが、これらは、いずれも冷却速度が遅いため、中
心偏析が生じ、又、凝固組織も大きい。[Conventional techniques and problems] Generally, billets are produced by (1) injecting molten metal into a mold, producing an ingot, and applying hot working; (2) producing by a so-called continuous casting method. However, these methods all have a slow cooling rate, resulting in center segregation and a large solidified structure.
別に溶融金属の鋳造方法として、特公昭５４−２９９８
５号公報に示される方法がある。この方法は加圧ガスに
より金属溶湯を噴霧し、噴霧粒子を金型やコンテナに受
け取ることにより、成形体を製゛造する方法である。こ
の方法によれば、成形体に偏析が見られず、微細な組織
のものが得られる。Separately, as a method for casting molten metal,
There is a method shown in Publication No. 5. This method is a method of manufacturing a molded body by spraying molten metal using pressurized gas and receiving the sprayed particles in a mold or container. According to this method, no segregation is observed in the molded product, and a fine structure can be obtained.
しかし、上記方法の場合、多量のカスを必要とし、コス
トが高くなると共に、噴射した粒子を全て回収するのは
困難であり、歩留が悪いという問題がある。However, in the case of the above method, there are problems in that a large amount of waste is required, the cost is high, and it is difficult to recover all the sprayed particles, resulting in a poor yield.
本発明の方法は、上記の問題を解決し、等軸品率が高く
、中心偏析の低い均一凝固組織を有するビレットを安価
に製造しようとするものである。The method of the present invention solves the above-mentioned problems and aims to inexpensively produce a billet having a uniform solidified structure with a high equiaxed product rate and low center segregation.
［発明の構成コ
上記問題を解決する冫コめ、本発明は、複数個の出湯ノ
ズルから底部が下方向へ移動しろる１個の金型へ溶融金
属を流下させ、この流下により金型内の湯面を撹拌させ
るとともに、未凝固溶融金属部分の厚さが一定に保たれ
るように出湯量に対応させて金型や凝固した部分を強制
的に冷却し、溶融金属の凝固に伴ない金型の底部を引き
さげて行くことを特徴としている。[Structure of the Invention] To solve the above problems, the present invention allows molten metal to flow down from a plurality of tapping nozzles into one mold whose bottom part moves downward, and as a result of this flowing down, the inside of the mold is In addition to agitating the surface of the molten metal, the mold and the solidified part are forcibly cooled in accordance with the amount of melt released so that the thickness of the unsolidified molten metal part is kept constant, and as the molten metal solidifies, the mold and solidified part are forcibly cooled. The feature is that the bottom of the mold is pulled down.
第１図は、本発明を実施する装置の一例を示すが、この
装置に従って本発明を説明する。FIG. 1 shows an example of an apparatus for carrying out the invention, and the invention will be explained according to this apparatus.
図において、１は溶融金属（以下溶湯という）を貯溜す
る容器、３は溶湯２を下方向に流下させる出湯ノズルで
、容器２の底に複数個取り付けられる。これら出湯ノズ
ル３より流下した金属流４は、下方に位置する金型５に
鋳込まれる。In the figure, 1 is a container for storing molten metal (hereinafter referred to as molten metal), and 3 is a tap nozzle for causing the molten metal 2 to flow downward, and a plurality of them are attached to the bottom of the container 2. The metal stream 4 flowing down from these tapping nozzles 3 is cast into a mold 5 located below.
金型５は金型枠９及び底部ＩＯよりなり、更に底部１０
は上下動できる支持柱１１によって支持され、金型枠９
は一定位置に維持することができる。The mold 5 consists of a mold frame 9 and a bottom part IO, and further includes a bottom part 10.
is supported by a support column 11 that can move up and down, and the mold frame 9
can be maintained in a fixed position.
金属流４の流下開始に際し、底部１０は金型枠９の下部
を閉じる。また、金型枠９及びその下方となる底部ｉｏ
の移動方向を所定の長さ囲んで環状の液体による冷却装
置８が設置される。When the metal stream 4 starts flowing down, the bottom 10 closes the lower part of the mold frame 9. In addition, the mold frame 9 and the bottom io below it
An annular liquid cooling device 8 is installed surrounding the moving direction for a predetermined length.
図は金型５により凝固部分７ができ、底部１０が下降し
、金型枠９の上部には、未凝固部分８があることを示し
ている。The figure shows that a solidified portion 7 is formed by the mold 5, a bottom portion 10 is lowered, and an unsolidified portion 8 is present at the top of the mold frame 9.
この未凝固部分６の厚さを一定に保つよう、出湯量に対
応させる。The thickness of the unsolidified portion 6 is kept constant depending on the amount of hot water discharged.
［作用コ
上記の鋳造方法において、複数個の出場ノズル３から１
個の金型５へ溶湯２を流下させることにより、金型５内
の湯面を撹拌するようにして鋳込むこととなり、この攪
拌によって湯面に多《の凝固粒子ができる。この凝固粒
子は、等軸品の結晶核となり、これを起点にして凝固が
始まるので、凝固組織を著しく改善し、等軸品率を増加
させ、中心偏析を低減する。もちろん、攪拌によって生
じた凝固粒子の一部は溶渦中で再溶解されるため、全て
が有効な結晶核とはならないが、副次的効果として、こ
れらの凝固粒子が再溶解時に溶解潜熱を奪うため、冷却
効果を存する。さらに未凝固部分の厚さを一定に保つよ
うに出湯量に対応させ、金型や凝固した部分を強制的に
冷却することにより均一な凝固組織を得ることができる
。[Operation] In the above casting method, a plurality of exit nozzles 3 to 1
By flowing the molten metal 2 into the individual molds 5, the molten metal 2 is poured while stirring the molten metal surface within the mold 5, and many solidified particles are formed on the molten metal surface by this stirring. These solidified particles become the crystal nuclei of the equiaxed product, and solidification starts from these, thereby significantly improving the solidification structure, increasing the equiaxed product rate, and reducing center segregation. Of course, some of the coagulated particles generated by stirring are remelted in the molten vortex, so not all of them become effective crystal nuclei, but as a side effect, these coagulated particles take away the latent heat of solution when remelted. Therefore, it has a cooling effect. Furthermore, a uniform solidified structure can be obtained by keeping the thickness of the unsolidified portion constant depending on the amount of melted metal and forcibly cooling the mold and the solidified portion.
［実施例コ
（１）底にノズル穴直径３ ．０ｍａ＋φの出湯ノズル
９個を５０ｍｍ間隔で、縦、横３×３の配列をとった溶
解ルツボを用い、これに２ ０ ０ ｋｇのＳＵＳ３０
４の溶湯を１５５０℃で１２５ｍｍ角の水冷金型に出湯
した。[Example (1) Nozzle hole diameter 3. A melting crucible was used in which nine 0ma+φ tap nozzles were arranged at 50mm intervals in a 3x3 vertical and horizontal arrangement, and 200 kg of SUS30 was placed in the melting crucible.
The molten metal from No. 4 was poured into a 125 mm square water-cooled mold at 1550°C.
そして、２１０ｍｍ／１ｎの速度で金型の底部を引き降
し、同時に金型の底部及び凝固部分を水で強制冷却した
。Then, the bottom of the mold was lowered at a speed of 210 mm/1n, and at the same time, the bottom of the mold and the solidified portion were forcibly cooled with water.
これにより、等軸品率（凝固断面に占める等軸品部分の
面積率）が５０−［ｉ０％で、かつ粒径が０．７〜ｌ
．Ｏｍｍの均一な凝固組織を得ることができた。As a result, the equiaxed product ratio (the area ratio of the equiaxed product portion in the solidified cross section) is 50-[i0%, and the particle size is 0.7 to l.
．． A uniform coagulation structure of 0 mm could be obtained.
（２）底にノズル穴直径５．０■φの出湯ノズル９個を
実施例（！）と同様の配列をとった溶解ルツボを用い、
これに、０．８％Ｃ− ０．２％Ｓｔ−０．５％Ｍｎ−
残Ｆｅ（いずれも重量％）の高炭素鋼１ ｔｏｎを溶精
し、１４８０℃で２００ｍｍ角の水冷金型に出湯した。(2) Using a melting crucible with nine tapping nozzles with a nozzle hole diameter of 5.0 φ arranged in the same manner as in the example (!) at the bottom,
To this, 0.8%C-0.2%St-0.5%Mn-
1 ton of high carbon steel with residual Fe (both weight %) was melted and poured into a 200 mm square water-cooled mold at 1480°C.
そして、２２５ｍｍ／ｍｌｎの速度で金型の底部を弓き
降し、金型の底の部分、凝固部分を水で強制冷却した。Then, the bottom of the mold was lowered at a rate of 225 mm/ml, and the bottom and solidified portions of the mold were forcibly cooled with water.
これにより、等軸品率が７０〜７５％で、かつ断面の、
中心部５ ｍｍＸ ５ ｍｍの領域での炭素量と、断面
全体平均炭素量の比が！．０３〜１．０５の中心偏析の
低い凝固組織を得ることができた。As a result, the equiaxed product rate is 70 to 75%, and the cross section is
The ratio of the carbon content in the central 5 mm x 5 mm area to the average carbon content of the entire cross section! ．． A solidified structure with low center segregation of 0.03 to 1.05 could be obtained.
（３）底にノズル穴直径２．５ｍｍφの出湯ノズル９個
を実施例（１）と同様の配列をとった溶解ルツボを用い
、これに、０．０５％Ｃ−１５％Ｏｒ−１．０％Ｎｂ−
２．５％ＴＩ− １．０％Ａ７− ７．０％Ｆｅ一残Ｎ
ｌ（いずれモｍ ｆ１ ％ ） （Ｄ Ｎ ｌ基合金ヲ
７ ０ ｋｇ溶解Ｌ、１５５０℃で１２５＋ｇｍ角の水
冷金型に出湯した。そして１４５ｍｍ／１ｎの速度で金
型の底部を引き降し、同時に金型の底部及び凝固部を水
で強制冷却した。(3) Using a melting crucible with nine tapping nozzles with a nozzle hole diameter of 2.5 mm in the same arrangement as in Example (1) at the bottom, 0.05%C-15%Or-1.0 %Nb-
2.5%TI- 1.0%A7- 7.0%Fe, balance N
70 kg of D N l-based alloy was melted and poured into a 125+gm square water-cooled mold at 1550°C.Then, the bottom of the mold was lowered at a speed of 145 mm/1n, At the same time, the bottom of the mold and the solidification part were forcibly cooled with water.
これにより、等軸晶率が６０〜７０％で、かつ粒径が０
．７〜ｌ ．ｈｍの均一な凝固組織を得ることができた
。As a result, the equiaxed crystallinity is 60-70% and the grain size is 0.
．． 7~l. A uniform coagulation structure of hm could be obtained.
［発明の効果コ
以上説明したように、本発明の鋳造方法によれば、等軸
品率が高く、中心偏析の低い均一な凝固組織を有するビ
レットを製造することができる。[Effects of the Invention] As explained above, according to the casting method of the present invention, a billet having a high equiaxed product rate and a uniform solidified structure with low center segregation can be manufactured.
従って、このビレットを用いた圧延製品、二次加工品は
均質で、加工性のすぐれたものが得られる。Therefore, rolled products and secondary processed products using this billet are homogeneous and have excellent workability.
第１図は、本発明を実施する装置を示し、同製造方法の
説明図である。
１・・・溶融金属容器、２・・・溶融金属（溶湯）、３
・・・出湯ノズル、４・・・溶融金属流、５・・・金型
、６・・・未凝固部分、７・・・凝固部分、８・・・冷
却装置、９・・・金型枠、１０・・・金型の底部、１１
・・・支持柱。FIG. 1 shows an apparatus for implementing the present invention and is an explanatory diagram of the manufacturing method thereof. 1... Molten metal container, 2... Molten metal (molten metal), 3
... Tapping nozzle, 4... Molten metal flow, 5... Mold, 6... Unsolidified portion, 7... Solidified portion, 8... Cooling device, 9... Mold frame , 10...bottom of the mold, 11
...Support pillar.
Claims (1)
る１個の金型へ溶融金属を流下させ、該溶融金属の流下
により金型内の溶融金属湯面を攪拌させるとともに、未
凝固溶融金属部分の厚さが一定に保たれるように前記溶
融金属の出湯量に対応させて前記金型や溶融金属の凝固
した部分を強制的に冷却し、前記溶融金属の凝固に伴な
い前記金型の底部を引きさげて行くことを特徴とする溶
融金属よりの鋳造方法。(1) Molten metal is made to flow down from multiple tap nozzles into one mold whose bottom can move downward, and the flowing down of the molten metal agitates the surface of the molten metal in the mold, and causes the molten metal to not solidify. The mold and the solidified part of the molten metal are forcibly cooled in accordance with the amount of the molten metal coming out so that the thickness of the molten metal part is kept constant, and as the molten metal solidifies, the solidified part of the molten metal is cooled. A method of casting from molten metal characterized by pulling down the bottom of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5079789A JPH02229649A (en) | 1989-03-01 | 1989-03-01 | Method of casting from molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5079789A JPH02229649A (en) | 1989-03-01 | 1989-03-01 | Method of casting from molten metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02229649A true JPH02229649A (en) | 1990-09-12 |
Family
ID=12868785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5079789A Pending JPH02229649A (en) | 1989-03-01 | 1989-03-01 | Method of casting from molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02229649A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002361374A (en) * | 2001-05-31 | 2002-12-17 | Daido Steel Co Ltd | Casting, vertical casting method, and vertical casting device |
-
1989
- 1989-03-01 JP JP5079789A patent/JPH02229649A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002361374A (en) * | 2001-05-31 | 2002-12-17 | Daido Steel Co Ltd | Casting, vertical casting method, and vertical casting device |
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