JPS6252009B2 - - Google Patents
Info
- Publication number
- JPS6252009B2 JPS6252009B2 JP1061184A JP1061184A JPS6252009B2 JP S6252009 B2 JPS6252009 B2 JP S6252009B2 JP 1061184 A JP1061184 A JP 1061184A JP 1061184 A JP1061184 A JP 1061184A JP S6252009 B2 JPS6252009 B2 JP S6252009B2
- Authority
- JP
- Japan
- Prior art keywords
- processing chamber
- gas
- heated
- container
- switching
- 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
- 239000007789 gas Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000112 cooling gas Substances 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B2005/062—Cooling elements
- F27B2005/066—Cooling elements disposed around the fan
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/14—Arrangements of heating devices
- F27B2005/143—Heating rods disposed in the chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/161—Gas inflow or outflow
- F27B2005/162—Gas inflow or outflow through closable or non-closable openings of the chamber walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/166—Means to circulate the atmosphere
- F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
【発明の詳細な説明】
本発明は冷却ガスを循環させて高温度の被熱物
を均一に冷却させる熱処理装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat treatment apparatus that uniformly cools a high-temperature object by circulating cooling gas.
鋼製品等の被熱物に冷却ガスを吹き付けて冷却
する場合、冷却ガスを被熱物に対し一方向からだ
け吹き付けてもその吹付面だけが速く温度が下り
均一冷却はできなかつた。このために均質な焼入
れ硬度が得られない。歪が大きい等の問題があつ
た。そこで例えば特公昭58−27324号公報に示さ
れた熱処理装置のように被熱物を両側から挾むよ
うに一対のフアンを設けて、両フアンを一定時間
毎に交互にオンオフさせて冷却ガスを被熱物に対
し順方向および逆方向に交互に流すようにしたも
のがすでに知られているが、しかしこれによれば
フアン等を２組設けなければならないために設備
コストが高くつき、また両フアンの電源の切換え
を行うものであるから過電流が生じ電力コストも
高いこと、および切換に伴なう時間的ロスが生じ
る欠点があつた。 When cooling a heated object such as a steel product by spraying cooling gas onto it, even if the cooling gas is sprayed onto the heated object only from one direction, only the surface onto which it is blown cools down quickly, making uniform cooling impossible. For this reason, uniform quenching hardness cannot be obtained. There were problems such as large distortion. Therefore, as in the heat treatment apparatus shown in Japanese Patent Publication No. 58-27324, a pair of fans are installed so as to sandwich the object to be heated from both sides, and both fans are turned on and off alternately at regular intervals to transfer the cooling gas to the heated object. A device is already known in which the material is caused to flow alternately in the forward and reverse directions, but this requires two sets of fans, etc., resulting in high equipment costs, and also requires the use of both fans. Since the power source is switched, overcurrent occurs, the power cost is high, and there is a time loss associated with switching.
本発明は上記欠点を解消せんとするもので、被
熱物が収容される処理室を密閉された容器内に配
設し、該処理室に隣接してガスクーラと循環フア
ンとを該循環フアンの吸入側にガスクーラを直結
して配設し、処理室の相対する壁面に夫々通気口
を開設し、該各通気口を循環フアンの吹出側また
はガスクーラの吸入側に択一的に連通させる切換
ダンパを夫々設け、該各切換ダンパを切換操作す
ることで処理室内の冷却ガスの流れ方向が反転し
得るようにし、これによつて被熱物を均一冷却す
ることを可能ならしめたものである。 The present invention aims to solve the above-mentioned drawbacks, and consists of disposing a processing chamber in which objects to be heated are housed in a sealed container, and installing a gas cooler and a circulation fan adjacent to the processing chamber. A switching damper in which a gas cooler is directly connected to the suction side, vents are provided on opposing walls of the processing chamber, and each vent is selectively communicated with the blowout side of a circulation fan or the suction side of the gas cooler. The flow direction of the cooling gas inside the processing chamber can be reversed by switching the switching dampers, thereby making it possible to uniformly cool the object to be heated.
以下に本発明の具体的実施例を第１図〜第４図
に従い説明する。水平に支持された円筒形の容器
１は一端に被熱物を装入するための開閉扉２が気
密に設けられていて内部が密閉できるようにして
いる。３は該容器１内に設けられた処理室で、該
処理室は断熱性および耐熱性に秀れた黒鉛を素材
とし被熱物５を収容している。４は被熱物５を該
処理室３内に支持しているテーブルで、該テーブ
ルも黒鉛製である。６は容器１内の奥部に配設さ
れた循環フアン、７は該循環フアンの吸入側に直
列に継がれたガスクーラ、８は循環フアン６を駆
動するモータで、循環フアン６の吹出側は一部が
容器１外へ突出したＵ字状の吹出ダクト９に継が
れている。１０は処理室３内で被熱物５を囲むよ
うに設けられた電気発熱体である。処理室３の相
対する壁面に一対の通気口１１ａ，１１ｂを開設
する。１２ａ，１２ｂは該通気口１１ａ，１１ｂ
を開閉する扉板で、容器１外に設けられたシリン
ダ１３ａ，１３ｂの作動軸端に夫々固着されてい
て該シリンダ１３ａ，１３ｂの作動で通気口１１
ａ，１１ｂが開閉できるようにしている。通気口
１１ａ，１１ｂの外側は循環ダクト１４ａ，１４
ｂが形成されており、該循環ダクト１４ａ，１４
ｂの他端は夫々切換ダンパ１５ａ，１５ｂが設け
られていてガスクーラ７の吸入側かまたは循環フ
アン６の吹出側に連通状態が切換できるようにし
ている。即ち回転軸１６ａ，１６ｂの一側に固着
された切換ダンパ１５ａ，１５ｂは、該回転軸お
１６ａ，１６ｂが回転することによつてガスクー
ラ７の吸入側との連通口１７ｃ，１７ｂまたは前
記吹出ダクト９との連通口１８ａ，１８ｂのいず
れかを閉塞し得るようにしている。１９ａ，１９
ｂは回転軸１６ａ，１６ｂを支える軸受、２０
ａ，２０ｂは該回転軸１６ａ，１６ｂを回転操作
するシリンダを示す。また、２１は容器１内を減
圧するため真空ポンプ（図示せず）に継がれた排
気管接続口、２２は容器１内にN2ガスを供給す
るためそのガス源に継がれた給気管接続口であ
る。 Specific embodiments of the present invention will be described below with reference to FIGS. 1 to 4. A horizontally supported cylindrical container 1 is airtightly provided with an opening/closing door 2 at one end for charging the object to be heated, so that the inside can be hermetically sealed. Reference numeral 3 denotes a processing chamber provided within the container 1, and the processing chamber is made of graphite, which has excellent heat insulation and heat resistance, and accommodates the object to be heated 5. Reference numeral 4 denotes a table that supports the object to be heated 5 in the processing chamber 3, and this table is also made of graphite. 6 is a circulation fan disposed deep inside the container 1; 7 is a gas cooler connected in series to the suction side of the circulation fan; 8 is a motor that drives the circulation fan 6; A portion thereof is connected to a U-shaped blow-off duct 9 that protrudes outside the container 1. Reference numeral 10 denotes an electric heating element provided in the processing chamber 3 so as to surround the object to be heated 5 . A pair of ventilation holes 11a and 11b are provided on opposing walls of the processing chamber 3. 12a and 12b are the ventilation holes 11a and 11b.
A door plate that opens and closes, and is fixed to the operating shaft ends of cylinders 13a and 13b provided outside the container 1, respectively, and opens the vent 11 when the cylinders 13a and 13b operate.
a and 11b can be opened and closed. Circulation ducts 14a, 14 are located outside the vents 11a, 11b.
b is formed, and the circulation ducts 14a, 14
The other end of b is provided with switching dampers 15a and 15b, respectively, so that the communication state can be switched to the suction side of the gas cooler 7 or the blowout side of the circulation fan 6. That is, the switching dampers 15a, 15b fixed to one side of the rotating shafts 16a, 16b are connected to the communication ports 17c, 17b with the suction side of the gas cooler 7 or the above-mentioned blow-off duct as the rotating shafts 16a, 16b rotate. 9 can be closed. 19a, 19
b is a bearing 20 that supports the rotating shafts 16a and 16b;
a and 20b indicate cylinders that rotate the rotating shafts 16a and 16b. Further, 21 is an exhaust pipe connection port connected to a vacuum pump (not shown) to reduce the pressure inside the container 1, and 22 is an air supply pipe connection connected to a gas source to supply N2 gas into the container 1. It is the mouth.
このように構成した熱処理装置では、真空ポン
プにより容器１内の空気を排出して該容器１内を
0.05Torr程度の減圧状態にし、発熱体１０に通電
してその高真空下で被熱物５を加熱する。従つて
被熱物５は酸化することなく光輝性が保持され
る。所定の温度に被熱物５が加熱でき発熱体１０
をオフした後に、容器１内に冷却用のN2ガスを
供給し該N2ガスにて容器１内を５〜７Kg／cm2の
加圧状態にする。そして循環フアン６、ガスクー
ラ７を駆動する。そのとき一方の切換ダンパ１５
ａは連通口１７ａを閉塞して循環ダクト１４ａと
吹出ダクト９とを連通させ、他方の切換ダンパ１
５ｂは連通口１８ｂを閉塞して循環ダクト１４ｂ
とガスクーラ７の吸入側とを連通させていてN2
ガスを図示矢印の方向に循環させる。このため通
気口１１ａから処理室３内に低温度のN2ガスが
吹出し被熱物５を冷却させる。そのN2ガスは通
気口１１ｂから循環ダクト１４ｂを通りガスクー
ラ７に戻されて再冷却され循環フアン６、吹出ダ
クト９、循環ダクト１４ａに流される。定時間こ
の循環をさせた後、シリンダ２０ａ，２０ｂを動
作させ切換ダンパパ１５ａ，１５ｂを操作しその
連通状態を切換する。即ち、切換ダンパ１５ａを
旋回させて連通口１７ａを開け連通口１７ｂを閉
じることによつて循環ダクト１４ａとガスクーラ
７の吸入側とを連通させると同時に、他方の切換
ダンパ１５ｂを旋回させて連通口１７ｂを閉じ連
通口１８ｂを開けることにより循環ダクト１４ｂ
と吹出ダクト９とを連通させる。そうすれば処理
室３内の冷却ガスの流れ方向は反転するため被熱
物５は通気口１１ｂから吹出したN2ガスにより
冷却される。即ち流れ方向が反転することによつ
て被熱物５は均一に冷却される。なお、その反転
は必要に応じて数回繰り返す。また、この場合容
器１内はN2ガスが加圧状態で高密度に充填され
ていることから移量に伴なう単位体積当りの熱運
搬量が高いために被熱物５を急速冷却することが
できる。 In the heat treatment apparatus configured in this way, the air inside the container 1 is discharged using a vacuum pump to clean the inside of the container 1.
The pressure is reduced to about 0.05 Torr, and the heating element 10 is energized to heat the object 5 under the high vacuum. Therefore, the object to be heated 5 retains its luster without being oxidized. A heating element 10 that can heat the object 5 to a predetermined temperature.
After turning off, N 2 gas for cooling is supplied into the container 1, and the inside of the container 1 is pressurized to 5 to 7 kg/cm 2 with the N 2 gas. Then, the circulation fan 6 and gas cooler 7 are driven. At that time, one switching damper 15
a closes the communication port 17a to connect the circulation duct 14a and the blow-off duct 9, and the other switching damper 1
5b closes the communication port 18b and connects the circulation duct 14b.
and the suction side of the gas cooler 7 to communicate with each other .
Circulate the gas in the direction of the arrow shown. Therefore, low-temperature N 2 gas is blown into the processing chamber 3 from the vent 11a to cool the object to be heated 5. The N 2 gas passes through the circulation duct 14b from the vent 11b, is returned to the gas cooler 7, is recooled, and then flows into the circulation fan 6, the blow-off duct 9, and the circulation duct 14a. After this circulation is carried out for a certain period of time, the cylinders 20a and 20b are operated and the switching dampers 15a and 15b are operated to switch their communication state. That is, by rotating the switching damper 15a to open the communication port 17a and closing the communication port 17b, the circulation duct 14a and the suction side of the gas cooler 7 are communicated, and at the same time, by rotating the other switching damper 15b, the communication port 17a is opened and the communication port 17b is closed. By closing 17b and opening the communication port 18b, the circulation duct 14b
and the blow-off duct 9 are communicated with each other. Then, the flow direction of the cooling gas in the processing chamber 3 is reversed, so that the object to be heated 5 is cooled by the N 2 gas blown out from the vent 11b. That is, by reversing the flow direction, the heated object 5 is uniformly cooled. Note that the reversal is repeated several times as necessary. In addition, in this case, since the inside of the container 1 is densely filled with N 2 gas under pressure, the amount of heat transferred per unit volume due to the transfer is high, so the object to be heated 5 is rapidly cooled. be able to.
第５図に示した本発明の別の実施例の熱処理装
置は、上記実施例における処理室３を加熱専用の
処理室３Ａと冷却専用の処理室３Ｂに区分して形
成してなり、２３はその仕切板を示す。同図中第
２図と同一符号については同一部分を示しその詳
しい説明は省略するが、この場合、処理室３Ａに
て真空状態で加熱された被熱物５を処理室３Ｂに
移してN2ガスの加圧状態で急冷させ、その際に
も切換ダンパ１５ａ，１５ｂを操作することで冷
却ガスの流れ方向を必要に応じ数回反転させ均一
冷却を図る。 A heat treatment apparatus according to another embodiment of the present invention shown in FIG. 5 is formed by dividing the processing chamber 3 in the above embodiment into a processing chamber 3A exclusively for heating and a processing chamber 3B exclusively for cooling. The partition plate is shown. The same reference numerals as in FIG. 2 indicate the same parts, and a detailed explanation thereof will be omitted, but in this case, the object to be heated 5 heated in a vacuum state in the processing chamber 3A is transferred to the processing chamber 3B and the The cooling gas is rapidly cooled in a pressurized state, and even at this time, the flow direction of the cooling gas is reversed several times as necessary by operating the switching dampers 15a and 15b to achieve uniform cooling.
以上説明したように本発明の熱処理装置は、切
換ダンパを操作することで連通状態を交換し処理
室内の冷却ガスの流れ方向を反転し得るようにし
たので、簡単な構成で設備コストがかからず被熱
物を均一冷却することができる。また処理室内の
流れを反転させるのに従来の電源切換する場合の
ように時間がかからず過電流のおそれもないので
電力コストも低く効率的に冷却できる利点がある
ものである。 As explained above, the heat treatment apparatus of the present invention can change the communication state and reverse the flow direction of the cooling gas in the processing chamber by operating the switching damper, so the equipment cost can be reduced with a simple configuration. The object to be heated can be cooled uniformly. In addition, it does not take much time to reverse the flow in the processing chamber, unlike the conventional case of switching the power supply, and there is no risk of overcurrent, which has the advantage of lower power cost and efficient cooling.
図面は本発明の熱処理装置の実施例図であつ
て、第１図は側面図、第２図は縦断面図、第３図
は第２図の−線断面図、第４図は第２図の
−線断面図、第５図は本発明の別の実施例を示
した継断面図である。
１……容器、３……処理室、５……被熱物、６
……循環フアン、７……ガスクーラ、９……吹出
ダクト、１０……発熱体、１１ａ，１１ｂ……通
気口、１５ａ，１５ｂ……切換ダンパ。
The drawings show an embodiment of the heat treatment apparatus of the present invention, in which FIG. 1 is a side view, FIG. 2 is a vertical cross-sectional view, FIG. 3 is a cross-sectional view taken along the - line in FIG. 2, and FIG. FIG. 5 is a joint sectional view showing another embodiment of the present invention. 1... Container, 3... Processing chamber, 5... Heat target, 6
...Circulation fan, 7...Gas cooler, 9...Blowout duct, 10...Heating element, 11a, 11b...Vent, 15a, 15b...Switching damper.
Claims (1)
内に配設し、該処理室に隣接してガスクーラと循
環フアンとを該循環フアンの吸入側にガスクーラ
を直結して配設し、処理室の相対する壁面に夫々
通気口を開設し、該各通気口を循環フアンの吹出
側またはガスクーラの吸入側に択一的に連通させ
る切換ダンパを夫々設け、該各切換ダンパを切換
操作することで処理室内の冷却ガスの流れ方向が
反転し得るように構成したことを特徴とする熱処
理装置。 ２ 処理室内に発熱体を設けた特許請求の範囲第
１項に記載の熱処理装置。 ３ 特許請求の範囲第１項又は第２項に記載の熱
処理装置において、容器内の気圧を減圧しまたは
加圧する装置を具備したことを特徴とする熱処理
装置。[Scope of Claims] 1. A processing chamber in which the object to be heated is housed is arranged in a sealed container, and a gas cooler and a circulation fan are connected adjacent to the processing chamber, and the gas cooler is directly connected to the suction side of the circulation fan. Ventilation ports are provided on opposing walls of the processing chamber, and switching dampers are provided to selectively connect each of the ventilation ports to the outlet side of the circulation fan or the intake side of the gas cooler. A heat processing apparatus characterized in that the flow direction of cooling gas within a processing chamber can be reversed by switching a switching damper. 2. The heat treatment apparatus according to claim 1, wherein a heating element is provided in the treatment chamber. 3. A heat treatment apparatus according to claim 1 or 2, characterized in that the heat treatment apparatus is equipped with a device for reducing or increasing the pressure inside the container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1061184A JPS60152616A (en) | 1984-01-23 | 1984-01-23 | Heat treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1061184A JPS60152616A (en) | 1984-01-23 | 1984-01-23 | Heat treating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60152616A JPS60152616A (en) | 1985-08-10 |
| JPS6252009B2 true JPS6252009B2 (en) | 1987-11-02 |
Family
ID=11755033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1061184A Granted JPS60152616A (en) | 1984-01-23 | 1984-01-23 | Heat treating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60152616A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2651307B1 (en) * | 1989-08-29 | 1993-12-17 | Traitement Sous Vide | HEAT TREATMENT OVEN EQUIPPED WITH IMPROVED COOLING MEANS. |
| WO2013046446A1 (en) * | 2011-09-30 | 2013-04-04 | 日本ピストンリング株式会社 | Cooling device |
| JP2019190801A (en) * | 2018-04-27 | 2019-10-31 | 中外炉工業株式会社 | Heat treatment furnace |
| CN111519005B (en) * | 2020-04-14 | 2021-12-10 | 中国科学院合肥物质科学研究院 | Large D-shaped Nb3Sn superconducting coil heat treatment equipment |
-
1984
- 1984-01-23 JP JP1061184A patent/JPS60152616A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60152616A (en) | 1985-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |