JPH0453926B2 - - Google Patents

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Publication number
JPH0453926B2
JPH0453926B2 JP58033428A JP3342883A JPH0453926B2 JP H0453926 B2 JPH0453926 B2 JP H0453926B2 JP 58033428 A JP58033428 A JP 58033428A JP 3342883 A JP3342883 A JP 3342883A JP H0453926 B2 JPH0453926 B2 JP H0453926B2
Authority
JP
Japan
Prior art keywords
temperature
cold water
hot water
water supply
vacuum container
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 - Lifetime
Application number
JP58033428A
Other languages
Japanese (ja)
Other versions
JPS59159926A (en
Inventor
Itsupei Yamauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP3342883A priority Critical patent/JPS59159926A/en
Publication of JPS59159926A publication Critical patent/JPS59159926A/en
Publication of JPH0453926B2 publication Critical patent/JPH0453926B2/ja
Granted legal-status Critical Current

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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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Description

【発明の詳細な説明】 (イ) 産業上の利用分野 本発明は、鋼材の熱処理分野等において利用で
きる真空焼入用の熱処理装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a heat treatment apparatus for vacuum hardening that can be used in the field of heat treatment of steel materials.

(ロ) 従来技術 ダイス鋼やハイスなどの型材の熱処理分野等に
おいては、所要温度にまで加熱したワークを真空
容器内に形成した冷却室内に配置し、この冷却室
内を流れる冷却ガスで前記ワークを冷却して焼入
処理を施すようにした方式が広く普及している。
そして、従来のものは、クーリングタワーで冷却
した冷水を前記冷却室内に設けた熱交換器に導く
ようにして、この熱交換器で前記冷却室内を循環
する冷却ガスを逐次冷して該冷却ガスの温度を略
一定の値に維持するようにしている。(b) Prior art In the field of heat treatment of mold materials such as die steel and high speed steel, a workpiece heated to a required temperature is placed in a cooling chamber formed in a vacuum container, and the workpiece is heated by cooling gas flowing inside the cooling chamber. A method that performs cooling and hardening treatment is widely used.
In the conventional system, the cold water cooled by the cooling tower is guided to a heat exchanger installed in the cooling chamber, and the heat exchanger sequentially cools the cooling gas circulating in the cooling chamber. The temperature is maintained at a substantially constant value.

ところが、近時、複雑で精度の高い金型等を製
作する必要の分野では、前述した従来の方式が有
している限界を越えて、さらに焼入硬度を損ねる
ことなしに焼入歪を小さくしたいという要望があ
る。 However, in recent years, in fields where it is necessary to manufacture complex and highly accurate molds, etc., it has become necessary to go beyond the limits of the conventional methods mentioned above and reduce quenching distortion without further impairing quenching hardness. There is a desire to do so.

(ハ) 目的 本発明は、このような事情に鑑みてなされたも
ので、比較的簡単な手順により焼入歪を無理なく
効果的に小さくすることができるようにした熱処
理装置を提供することを目的とするものである。(c) Purpose The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat treatment apparatus that can reasonably and effectively reduce quenching distortion through a relatively simple procedure. This is the purpose.

(ニ) 構成 本発明は、かかる目的を達成するために、内部
にワークを配置するための冷却室を形成する真空
容器と、この真空容器内に封入した冷却ガスを強
制循環させる送風手段と、この送風手段から前記
ワークに向かう冷却ガスを冷水または温水と熱交
換させるための熱交換手段と、この熱交換手段に
冷水を供給するための冷水供給系路と、前記熱交
換手段に温水を供給するための温水供給系路と、
前記真空容器内の冷却ガスの一部を排気するため
の排気手段と、前記冷却室内の温度を検出しその
温度が設定値を上まわつている間は前記冷水供給
系路側から冷水を熱交換手段に供給させ前記温度
が設定値を下わまつた時に前記冷水供給系路を遮
断するとともに前記温水供給系路側から温水を熱
交換手段に供給させかつ前記排気手段を作動させ
て前記冷却室内のガス圧を低下させる制御手段と
を具備してなることを特徴とする。(d) Configuration In order to achieve the above object, the present invention includes a vacuum container forming a cooling chamber in which a work is placed, and a blowing means for forcibly circulating cooling gas sealed in the vacuum container. A heat exchange means for exchanging heat of the cooling gas directed from the air blowing means toward the workpiece with cold water or hot water; a cold water supply line for supplying cold water to the heat exchange means; and a supply line for supplying hot water to the heat exchange means. a hot water supply line for
an exhaust means for exhausting a part of the cooling gas in the vacuum container; and a heat exchange means for detecting the temperature in the cooling chamber and supplying cold water from the cold water supply system side while the temperature exceeds a set value. When the temperature falls below a set value, the cold water supply line is cut off, hot water is supplied from the hot water supply line to the heat exchange means, and the exhaust means is operated to remove the gas in the cooling chamber. It is characterized by comprising a control means for lowering the pressure.

(ホ) 実施例 以下、本発明の一実施例を図面を参照して説明
する。(e) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

第１図は、本発明に係る熱処理装置１の概略正
断面図であり、第２図は同装置１の概略側断面図
を含むシステム説明図である。これらの図面に示
されているように、本熱処理装置１は中央部にワ
ークＡを配置するための冷却室２を形成した円筒
体状の真空容器３と、この真空容器３の内周壁面
に沿つて設けられ終端４ａを前記ワークＡの下面
部に臨ませた波線形の通風路４と、この通風路４
に関連させて設けた熱交換手段５と、前記真空容
器３内に封入したN2ガス等の冷却ガスを前記通
風路４を通して強制循環させる送風手段６とを具
備している。また、前記熱交換手段５に冷水を供
給するための冷水供給系路７と、前記熱交換手段
５に温水を供給するための温水供給系路８と、前
記真空容器３内のガスを排気するための排気手段
９とを設け、これら両系路７，８および排気手段
９を制御手段１１によつて制御するようにしてい
る。 FIG. 1 is a schematic front sectional view of a heat treatment apparatus 1 according to the present invention, and FIG. 2 is a system explanatory diagram including a schematic side sectional view of the apparatus 1. As shown in these drawings, the present heat treatment apparatus 1 includes a cylindrical vacuum container 3 in which a cooling chamber 2 for arranging a workpiece A is formed in the center, and a vacuum container 3 on the inner circumferential wall of the vacuum container 3. A wavy-shaped ventilation passage 4 that is provided along the line and has an end 4a facing the lower surface of the workpiece A;
A heat exchange means 5 provided in association with the vacuum container 3 and a blower means 6 for forcibly circulating a cooling gas such as N 2 gas sealed in the vacuum container 3 through the ventilation passage 4 are provided. Further, a cold water supply line 7 for supplying cold water to the heat exchange means 5, a hot water supply line 8 for supplying hot water to the heat exchange means 5, and a gas in the vacuum container 3 are exhausted. A control means 11 controls these two systems 7, 8 and the exhaust means 9.

具体的に説明すれば、真空容器３は、一側壁に
密閉扉１２を有するとともに他側壁に中間扉１３
を有してなる円筒体状のもので、その内部に設け
た２枚の鉛直壁１４間に前記冷却室２が形成され
ている。また、前記通風路４は、前記鉛直壁１４
と前記真空容器３の周壁１５との間に形成された
通路で、半円弧状にわん曲させた終端４ａの近傍
部の開路幅を他の部位の開路幅よりも小さく設定
している。また、熱交換手段５は、前記通風路４
の開路幅の広い部位に配設した熱交換器１６と、
前記真空容器３の周壁１５内に形成され内部を冷
却用流体、つまり、前記冷水または温水が流れる
ジヤケツト１７とからなる。また、前記送風手段
６は、前記真空容器３内の天井部に設けたターボ
形の送風機であり、前記冷却室２から吸引した冷
却ガスを逐次前記通風路４の始端４ｂに送り込む
ようになつている。また、冷水供給系路７は、前
記熱交換器１６の蛇行配置形フイン付パイプ１６
ａの一端および前記ジヤケツト１７の上端部から
取り出した水をチリングユニツト（冷凍機）１８
により所定の低温度にまで冷却し、それによつて
得た冷水を前記パイプ１６ａの他端および前記ジ
ヤケツト１７の下端部に供給し得るように構成し
たもので、その途中に電磁弁１９，２１が介設し
てある。また、温水供給系路８は、前記パイプ１
６ａの一端および前記ジヤケツト１７の上端部か
ら取り出した水をサブタンク２２内に導入し、こ
のサブタンク２２内でヒータ２３等により所定の
温度に調整した温水を前記パイプ１６ａの他端お
よび前記ジヤケツト１３の下端部に供給し得るよ
うに構成したもので、その途中に電磁弁２４，２
５が介設してある。なお、要すれば、前記真空容
器３に隣接する加熱炉２６の炉壁２７内の温水
（約40℃）を前記サブタンク２２内に導くように
してもよい。また、排気手段９は真空ポンプ等を
内蔵した通常のもので、その入力端子に作動指令
信号が入力された場合に作動するようになつてい
る。また、制御手段１１は、前記真空容器３内の
温度を検出する温度センサ２８および該真空容器
３内の圧力を検出する圧力センサ２９等から入力
信号を受け、前記電磁弁１９，２１，２４，２５
および前記排気手段１９等に向けて後述するよう
な手順で指令信号を出力し得るようにプログラム
されている。 Specifically, the vacuum container 3 has a sealed door 12 on one side wall and an intermediate door 13 on the other side wall.
The cooling chamber 2 is formed between two vertical walls 14 provided inside the cylindrical body. Further, the ventilation passage 4 is connected to the vertical wall 14.
In the passage formed between the peripheral wall 15 of the vacuum vessel 3, the opening width in the vicinity of the terminal end 4a curved into a semicircular arc shape is set smaller than the opening width in other parts. Further, the heat exchange means 5 includes the ventilation passage 4.
a heat exchanger 16 disposed at a wide open circuit area;
It consists of a jacket 17 formed within the peripheral wall 15 of the vacuum vessel 3, through which a cooling fluid, ie, the cold water or hot water, flows. The blowing means 6 is a turbo-type blower installed on the ceiling of the vacuum container 3, and is configured to sequentially send the cooling gas sucked from the cooling chamber 2 to the starting end 4b of the ventilation path 4. There is. Further, the cold water supply line 7 is connected to the meandering finned pipe 16 of the heat exchanger 16.
The water taken out from one end of a and the upper end of the jacket 17 is transferred to a chilling unit (freezer) 18.
The cooling water is cooled to a predetermined low temperature by cooling the water to a predetermined low temperature, and the resulting cold water is supplied to the other end of the pipe 16a and the lower end of the jacket 17, with solenoid valves 19 and 21 installed in the middle. It has been intervened. Further, the hot water supply line 8 is connected to the pipe 1.
The water taken out from one end of the pipe 16a and the upper end of the jacket 17 is introduced into the sub-tank 22, and the hot water adjusted to a predetermined temperature in the sub-tank 22 by a heater 23 or the like is introduced into the other end of the pipe 16a and the jacket 13. It is configured so that it can be supplied to the lower end, and there are solenoid valves 24, 2 in the middle.
5 is interposed. Note that, if necessary, hot water (approximately 40° C.) within the furnace wall 27 of the heating furnace 26 adjacent to the vacuum vessel 3 may be led into the sub-tank 22. Further, the evacuation means 9 is a normal one having a built-in vacuum pump or the like, and is adapted to be activated when an operation command signal is input to its input terminal. Further, the control means 11 receives input signals from a temperature sensor 28 for detecting the temperature inside the vacuum vessel 3, a pressure sensor 29 for detecting the pressure inside the vacuum vessel 3, etc., and receives input signals from the electromagnetic valves 19, 21, 24, 25
It is also programmed to output a command signal to the exhaust means 19 and the like according to a procedure described later.

なお、３１は給気系路３２を介して前記真空容
器３に接続した冷却ガス補給用のサージタンク３
３は前記給気系路３２に介設した電磁弁である。
また、３４は、前記ワークＡを冷却室２の所要高
さ位置に保持するエレベータである。 Note that 31 is a surge tank 3 for replenishing cooling gas connected to the vacuum container 3 via an air supply line 32.
3 is a solenoid valve installed in the air supply system path 32.
Further, 34 is an elevator that holds the work A at a required height position in the cooling chamber 2.

次いで、本発明に係る熱処理装置１を使用して
真空焼入を行う手順を説明する。 Next, a procedure for performing vacuum hardening using the heat treatment apparatus 1 according to the present invention will be explained.

まず、型材等のワークＡを加熱路２６内で所定
の温度（例えば、1050℃程度）にまで加熱する。
しかる後、このワークＡを中間扉１３を開けて真
空容器３内に移行させ、エレベータ３４により保
持して冷却室２内の所要高さ位置に配置する。そ
して、排気手段９により真空容器３内を排気した
後、電磁弁３３を開いてサージタンク３１から冷
却ガスを前記真空容器３内に所要量供給して該真
空容器３内の圧力を、例えば、1.4atmに保つ。
この状態で冷水供給系路７の電磁弁１９，２１を
開くとともに送風手段６を作動させる。その結果
チリングユニツト１８により冷却された冷水が通
風路４中に設けた熱交換器１６と真空容器８の周
壁１５内に設けたジヤケツト１７に逐次供給され
るとともに、前記真空容器３内の冷却ガスが前記
通風路４および冷却室２を通して循環することに
なる。このとき、送風手段６から通風路４に順次
送り込まれる冷却ガスは、この通風路４内を流れ
る間に前記熱交換器１６内および前記ジヤケツト
１７内を流通する冷水と熱交換して冷却され、温
度の低くなつた冷却ガスが前記冷却室２内に配置
したワークＡに吹き付けられる。そのため、この
ワークＡが第３図に示すように急速に冷却され
る。そして、このワークＡが所定の中間温度
（MS点の近傍）にまで冷却された時点、換言す
れば、温度センサ２８により検出される通風路４
の始端近傍部における冷却ガスの温度が設定値に
達した場合には、この時点を境にしてワークＡの
冷却条件を変更する。すなわち、前記冷却ガスの
温度が設定値よりも低くなると、冷水供給系路７
の電磁弁１９，２１を閉成状態に切り換えるとと
もに、温度供給系路８の電磁弁２４，２５を開
く。また、排気手段９を作動させて前記真空容器
３内の圧力を、例えば、650Torr程度にまで低下
させる。その結果、前記熱交換器１６およびジヤ
ケツト１７内に温水が供給されるとともに、通風
路４および冷却室２を密度の低い希薄な冷却ガス
が循環することになる。そのため、ワークＡが、
各部の温度が比較的均一な状態でゆつくりと冷却
されることになる。 First, a workpiece A such as a mold material is heated in the heating path 26 to a predetermined temperature (for example, about 1050° C.).
Thereafter, the intermediate door 13 is opened to move the workpiece A into the vacuum container 3, and the workpiece A is held by the elevator 34 and placed at a required height within the cooling chamber 2. After the inside of the vacuum container 3 is evacuated by the exhaust means 9, the electromagnetic valve 33 is opened to supply a required amount of cooling gas from the surge tank 31 into the vacuum container 3 to reduce the pressure inside the vacuum container 3, for example. Keep it at 1.4 atm.
In this state, the solenoid valves 19 and 21 of the cold water supply line 7 are opened and the blowing means 6 is operated. As a result, the chilled water cooled by the chilling unit 18 is sequentially supplied to the heat exchanger 16 provided in the ventilation passage 4 and the jacket 17 provided in the peripheral wall 15 of the vacuum container 8, and the cooling gas in the vacuum container 3 is circulated through the ventilation passage 4 and the cooling chamber 2. At this time, the cooling gas sequentially sent into the ventilation passage 4 from the ventilation means 6 is cooled by exchanging heat with the cold water flowing in the heat exchanger 16 and the jacket 17 while flowing in the ventilation passage 4. The cooling gas whose temperature has become lower is blown onto the workpiece A placed in the cooling chamber 2. Therefore, this work A is rapidly cooled down as shown in FIG. Then, when the workpiece A is cooled to a predetermined intermediate temperature (near the MS point), in other words, the ventilation passage 4 detected by the temperature sensor 28
When the temperature of the cooling gas in the vicinity of the starting end reaches the set value, the cooling conditions for the workpiece A are changed from this point onward. That is, when the temperature of the cooling gas becomes lower than the set value, the cold water supply line 7
The solenoid valves 19 and 21 of the temperature supply line 8 are switched to the closed state, and the solenoid valves 24 and 25 of the temperature supply line 8 are opened. Further, the exhaust means 9 is operated to reduce the pressure inside the vacuum container 3 to, for example, about 650 Torr. As a result, hot water is supplied into the heat exchanger 16 and the jacket 17, and a dilute cooling gas having a low density is circulated through the ventilation passage 4 and the cooling chamber 2. Therefore, work A is
The temperature of each part is relatively uniform and the parts are cooled slowly.

このように、本装置を上述した態様で用いる
と、冷却を開始してからワークＡがMS点の近傍
に設定した中間温度T1に達するまでの前段領域
では、前記ワークＡを急速に冷却し、一方、前
記ワークＡの温度が前記中間温度T1を下まわる
ことになる後段領域では、密度が低く温度が比
較的高い冷却ガスをワークＡに供給することによ
つて該ワークＡの各部の温度を可及的に均一に保
持しつつゆつくりとした速度で冷却を進めること
ができる。そのため、MS点を通過する時点が各
部でまちまちとなる従来の方式に比べて、焼入歪
を大幅に小さくすることができる。 As described above, when this apparatus is used in the above-described manner, the workpiece A is rapidly cooled in the first stage region from the start of cooling until the workpiece A reaches the intermediate temperature T1 set near the MS point. On the other hand, in the latter region where the temperature of the workpiece A falls below the intermediate temperature T1 , each part of the workpiece A is cooled by supplying a cooling gas with a low density and a relatively high temperature to the workpiece A. Cooling can proceed at a slow rate while keeping the temperature as uniform as possible. Therefore, quenching distortion can be significantly reduced compared to the conventional method in which the point at which the material passes through the MS point varies from part to part.

しかも、本装置は、上述した焼入れに関する独
特の冷却条件（冷却ガスの温度、圧力）に係る制
御を、熱交換用の冷水および温水の切換操作、並
びに冷却ガスの圧力制御のみによつて簡略に行う
ようにしているので、熟練を要さずとも、簡単か
つ確実に良質の最終製品を得ることができる。 Furthermore, this device can easily control the unique cooling conditions (temperature and pressure of cooling gas) related to quenching described above by simply switching between cold water and hot water for heat exchange and controlling the pressure of cooling gas. This allows you to easily and reliably obtain a high-quality final product without requiring any skill.

(ヘ) 効果 本発明の熱処理装置は、冷却ガスの密度および
温度を変更することによつて焼入条件を設定温度
の前後で異ならせ、設定温度以下の領域における
ワークの冷却を均一かつ緩慢なものにしているの
で、硬度を損ねることなしに焼入歪を無理なく小
さなものにすることができる。そのため、高精度
を要求される複雑な型材の焼入処理等に適用した
場合にきわめて良好な結果を得ることができる優
れた効果がある。(F) Effect The heat treatment apparatus of the present invention changes the quenching conditions before and after the set temperature by changing the density and temperature of the cooling gas, and uniformly and slowly cools the workpiece in the area below the set temperature. Since the steel is made of a solid material, the quenching strain can be easily reduced without compromising the hardness. Therefore, when applied to the hardening treatment of complex mold materials that require high precision, it has an excellent effect that extremely good results can be obtained.

しかも、そのための構成が、真空容器に設けた
熱交換手段に冷水供給系路と温水供給系路とを接
続しておき、前記真空容器内の温度に応じてこれ
らの系路を選択的に使用するとともに、前記真空
容器に接続した排気系路の作動を制御し得るよう
にしたものであるため、温度の検出や電磁弁の切
換えなど、熟成された技術のみを用いて焼入条件
を速かに切換えることができる。したがつて、簡
単かつ確実に最適焼入条件を満たす手順を実施す
ることができる熱処理装置を提供できるものであ
る。 Moreover, the configuration for this purpose is to connect a cold water supply system line and a hot water supply system line to a heat exchange means provided in the vacuum vessel, and to selectively use these lines according to the temperature inside the vacuum vessel. At the same time, since it is possible to control the operation of the exhaust system connected to the vacuum vessel, the quenching conditions can be adjusted quickly using only mature technologies such as temperature detection and switching of solenoid valves. can be switched to Therefore, it is possible to provide a heat treatment apparatus that can easily and reliably carry out a procedure that satisfies the optimum quenching conditions.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例を示し、第１図は概略
正断面図、第２図はシステム説明図、第３図は焼
入条件を説明するための説明図である。 １……熱処理装置、２……冷却室、３……真空
容器、４……通風路、５……熱交換手段、６……
送風手段、７……冷水供給系路、８……温水供給
系路、９……排気手段、１１……制御手段、Ａ…
…ワーク、……前段領域、……後段領域。 The drawings show an embodiment of the present invention, in which FIG. 1 is a schematic front sectional view, FIG. 2 is an explanatory diagram of the system, and FIG. 3 is an explanatory diagram for explaining quenching conditions. 1... Heat treatment device, 2... Cooling chamber, 3... Vacuum container, 4... Ventilation path, 5... Heat exchange means, 6...
Air blowing means, 7...Cold water supply line, 8...Hot water supply line, 9...Exhaust means, 11...Control means, A...
...work, ...front stage area, ...back stage area.

Claims (1)

【特許請求の範囲】[Claims] １ 内部にワークを配置するための冷却室を形成
する真空容器と、この真空容器内に封入した冷却
ガスを強制循環させる送風手段と、この送風手段
から前記ワークに向かう冷却ガスを冷水または温
水と熱交換させるための熱交換手段と、この熱交
換手段に冷水を供給するための冷水供給系路と、
前記熱交換手段に温水を供給するための温水供給
系路と、前記真空容器内の冷却ガスの一部を排気
するための排気手段と、前記冷却室内の温度を検
出しその温度が設定値を上まわつている間は前記
冷水供給系路側から冷水を熱交換手段に供給させ
前記温度が設定値を下わまつた時に前記冷水供給
系路を遮断するとともに前記温水供給系路側から
温水を熱交換手段に供給させかつ前記排気手段を
作動させて前記冷却室内のガス圧を低下させる制
御手段とを具備してなることを特徴とする熱処理
装置。1. A vacuum container forming a cooling chamber in which a work is placed, a blowing means for forcibly circulating cooling gas sealed in the vacuum container, and cooling gas directed from the blowing means toward the work to be cooled or hot water. a heat exchange means for exchanging heat; a cold water supply line for supplying cold water to the heat exchange means;
A hot water supply line for supplying hot water to the heat exchange means, an exhaust means for exhausting a part of the cooling gas in the vacuum container, and a temperature in the cooling chamber that is detected so that the temperature reaches a set value. While the temperature is rising, cold water is supplied to the heat exchange means from the cold water supply system side, and when the temperature falls below a set value, the cold water supply system is shut off, and hot water is heat exchanged from the hot water supply system side. A heat treatment apparatus comprising: control means for supplying gas to the cooling chamber and operating the exhaust means to reduce the gas pressure in the cooling chamber.
JP3342883A 1983-02-28 1983-02-28 Method and device for heat treatment Granted JPS59159926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3342883A JPS59159926A (en) 1983-02-28 1983-02-28 Method and device for heat treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3342883A JPS59159926A (en) 1983-02-28 1983-02-28 Method and device for heat treatment

Publications (2)

Publication Number Publication Date
JPS59159926A JPS59159926A (en) 1984-09-10
JPH0453926B2 true JPH0453926B2 (en) 1992-08-28

Family

ID=12386276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3342883A Granted JPS59159926A (en) 1983-02-28 1983-02-28 Method and device for heat treatment

Country Status (1)

Country Link
JP (1) JPS59159926A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63149313A (en) * 1986-12-12 1988-06-22 Daido Steel Co Ltd gas quenching furnace
WO2005123970A1 (en) * 2004-06-15 2005-12-29 Narasimhan Gopinath A process and device for hardening metal parts
PL2313533T3 (en) * 2008-07-24 2012-11-30 Ipsen Int Gmbh Retort furnace with decoupled charge support, for heat treating metal workpieces
JP5912670B2 (en) * 2012-03-02 2016-04-27 Ｄｏｗａサーモテック株式会社 Work gas cooling system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827324B2 (en) * 1979-11-28 1983-06-08 株式会社神戸製鋼所 heat treatment equipment

Also Published As

Publication number Publication date
JPS59159926A (en) 1984-09-10

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