JPH03297551A - Production of unidirectional solidified material - Google Patents
Production of unidirectional solidified materialInfo
- Publication number
- JPH03297551A JPH03297551A JP10018390A JP10018390A JPH03297551A JP H03297551 A JPH03297551 A JP H03297551A JP 10018390 A JP10018390 A JP 10018390A JP 10018390 A JP10018390 A JP 10018390A JP H03297551 A JPH03297551 A JP H03297551A
- Authority
- JP
- Japan
- Prior art keywords
- solidified material
- unidirectional
- cooling
- unidirectional solidified
- quality
- 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
- 239000000463 material Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 5
- 239000003507 refrigerant Substances 0.000 claims description 5
- 239000012768 molten material Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 abstract description 13
- 230000008023 solidification Effects 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000012212 insulator Substances 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000013021 overheating Methods 0.000 abstract description 2
- 238000007796 conventional method Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal 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〕
本発明は品質のすぐれた一方向凝固材料を効率よく製造
する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for efficiently producing a unidirectionally solidified material of excellent quality.
方向凝固材料を製造するためには、溶融域と凝固域の間
に温度勾配を与えて結晶を一方向に成長させることが必
要である。従来の方法は水冷による強制凝固によって温
度勾配を得ている。To produce a directionally solidified material, it is necessary to provide a temperature gradient between the melting zone and the solidifying zone to cause crystals to grow in one direction. The conventional method obtains a temperature gradient by forced solidification using water cooling.
第３図は金属材料における温度勾配、凝固速度、凝固組
織間の関係を示している。一方向凝固は領域［Ｆ］、［
Ｆ］で得られる。従来の方法では温度勾配が充分大きく
ないので（約１００℃／ ｃｍが限界）一方向凝固組織
を得るためには凝固速度を小さく押えなければならない
（第３図の■）。FIG. 3 shows the relationship between temperature gradient, solidification rate, and solidification structure in a metal material. Unidirectional solidification is in the region [F], [
F]. In the conventional method, the temperature gradient is not large enough (the limit is approximately 100°C/cm), so in order to obtain a unidirectionally solidified structure, the solidification rate must be kept low (■ in Figure 3).
即ち生産効率が劣り、コストも高くなるという問題があ
る。さらに凝固組織が粗く、品質もあまりよくない。That is, there are problems in that production efficiency is poor and costs are high. Furthermore, the coagulation structure is coarse and the quality is not very good.
本発明は上記技術水準に鑑み、従来方法よりも効率よく
、かつ品質の優れた一方向凝固材料を製造しうる方法を
提供しようとするものである。In view of the above-mentioned state of the art, the present invention aims to provide a method for producing a unidirectionally solidified material of higher quality and efficiency than conventional methods.
本発明は溶解された材料を凝固前に過加熱し、かつ液体
金属等の冷却能力の優れた冷媒で冷却して凝固させるこ
とを特徴とする一方向凝固材料の製造方法である。The present invention is a method for producing a unidirectionally solidified material, which is characterized by superheating a molten material before solidifying it, and cooling and solidifying it with a refrigerant with excellent cooling ability, such as a liquid metal.
本発明では溶湯を過加熱すること及び液体金属など冷却
能力の優れた冷媒で強制冷却して凝固させることによっ
て、極めて大きい温度勾配（３００℃／ ０ｍ以上）と
高い冷却速度を得る。In the present invention, an extremely large temperature gradient (more than 300° C./0 m) and a high cooling rate are obtained by overheating the molten metal and forcing it to cool and solidify using a refrigerant with excellent cooling ability, such as a liquid metal.
これによって第３図の領域［Ｆ］に相当する組織の微細
な高品質の一方向凝固材料が得られる。As a result, a high-quality, unidirectionally solidified material with a fine structure corresponding to region [F] in FIG. 3 is obtained.
以下、本発明の一実施例を第１図によって説明する。第
１図において、１は溶湯（溶融金＠）、２は液体一固体
界面（凝固界面）、３は結晶成長域（一方向凝固）、４
は一方向凝固材料、５はサセプタ（黒鉛等）、６は鋳型
（セラミック等）、７は冷媒（液体金属）、８は冷却水
、９はシール、１０はインシュレータである。An embodiment of the present invention will be described below with reference to FIG. In Fig. 1, 1 is molten metal (molten gold), 2 is liquid-solid interface (solidification interface), 3 is crystal growth region (unidirectional solidification), 4
5 is a unidirectionally solidified material, 5 is a susceptor (graphite, etc.), 6 is a mold (ceramic, etc.), 7 is a refrigerant (liquid metal), 8 is cooling water, 9 is a seal, and 10 is an insulator.
第１図において、抵抗加熱によって溶解された溶湯１は
インシュレータ１０の間を通過したのち、サセプタ５を
介して誘導加熱によって蒸発しない程度の温度まで過加
熱される。その後、鋳型６に入り、ここで冷媒７の冷却
効果によって一方向凝固を開始し、一方向凝固材料４と
なる。所定の温度勾配が得られるような速度で下方に移
動させることによって順次一方向凝固材料４ができ上っ
て行く。タービンブレード等に用いる耐熱合金の場合、
３００℃／ ０ｍ以上の大きな温度勾配を与えることが
可能となるので、効率よく一方向凝固材料を製造するこ
とができる。又凝固速度が大きいので組織が微細化され
る。In FIG. 1, molten metal 1 melted by resistance heating passes between insulators 10, and then is superheated via induction heating to a temperature at which it does not evaporate via a susceptor 5. After that, it enters the mold 6, where it starts to solidify in one direction due to the cooling effect of the coolant 7, and becomes a one-way solidified material 4. The unidirectionally solidified material 4 is successively formed by moving it downward at a speed that provides a predetermined temperature gradient. In the case of heat-resistant alloys used for turbine blades, etc.
Since it is possible to provide a large temperature gradient of 300° C./0 m or more, it is possible to efficiently produce a unidirectionally solidified material. Also, since the solidification rate is high, the structure is refined.
第２図は従来の方法の一態様を説明する装置を示すもの
であって、１は溶湯（溶融金属）、２は液体一固体界面
（凝固界面）、３は結晶成長域（一方向凝固）、４は一
方向凝固材料、５は誘導コイル、６は断熱材、７はサセ
プタ、８は鋳型、９は水冷銅板であり、その原理は第１
図と同じであるが、溶湯の過加熱は行わず、又冷媒は水
であるため温度勾配が第１図よりも小さいので、移動速
度を大きくできず（耐熱合金で１００℃／ ｃｍ以下）
、効率が劣る。また、凝固速度が小さいので組織が粗く
、品質も劣る。Figure 2 shows an apparatus for explaining one aspect of the conventional method, in which 1 is a molten metal (molten metal), 2 is a liquid-solid interface (solidification interface), and 3 is a crystal growth region (unidirectional solidification). , 4 is a unidirectionally solidified material, 5 is an induction coil, 6 is a heat insulator, 7 is a susceptor, 8 is a mold, and 9 is a water-cooled copper plate.
It is the same as the figure, but since the molten metal is not overheated and the refrigerant is water, the temperature gradient is smaller than in Figure 1, so the moving speed cannot be increased (100℃/cm or less for heat-resistant alloys).
, less efficient. Furthermore, since the solidification rate is slow, the structure is coarse and the quality is poor.
本発明によれば、従来の方法よりも効率よく、かつ品質
の優れた一方向凝固材料を製造することが可能となる。According to the present invention, it is possible to produce a unidirectionally solidified material with higher efficiency and quality than conventional methods.
第１図は本発明の一実施例を実施する装置の説明図、第
２図は従来の一方向凝固材料の製造の一態様を実施する
装置の説明図、第３図は温度勾配、凝固速度及び凝固組
織の関係を示す図表である。Fig. 1 is an explanatory diagram of an apparatus for carrying out an embodiment of the present invention, Fig. 2 is an explanatory diagram of an apparatus for carrying out one aspect of the production of a conventional unidirectionally solidified material, and Fig. 3 is an illustration of temperature gradient and solidification rate. FIG.
Claims (1)
冷却能力の優れた冷媒で冷却して凝固させることを特徴
とする一方向凝固材料の製造方法。A method for producing a unidirectionally solidified material, which comprises superheating a molten material before solidifying it, and cooling and solidifying it with a refrigerant with excellent cooling ability, such as a liquid metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10018390A JPH03297551A (en) | 1990-04-18 | 1990-04-18 | Production of unidirectional solidified material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10018390A JPH03297551A (en) | 1990-04-18 | 1990-04-18 | Production of unidirectional solidified material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03297551A true JPH03297551A (en) | 1991-12-27 |
Family
ID=14267194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10018390A Pending JPH03297551A (en) | 1990-04-18 | 1990-04-18 | Production of unidirectional solidified material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03297551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007523745A (en) * | 2003-02-28 | 2007-08-23 | ゾー ウント ゾー ゾマーホーファー オッフェネ エアヴェルプスゲゼルシャフト | Continuous casting method |
-
1990
- 1990-04-18 JP JP10018390A patent/JPH03297551A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007523745A (en) * | 2003-02-28 | 2007-08-23 | ゾー ウント ゾー ゾマーホーファー オッフェネ エアヴェルプスゲゼルシャフト | Continuous casting method |
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