JPS6033188B2 - Metal heat treatment equipment - Google Patents

Metal heat treatment equipment

Info

Publication number
JPS6033188B2
JPS6033188B2 JP55136147A JP13614780A JPS6033188B2 JP S6033188 B2 JPS6033188 B2 JP S6033188B2 JP 55136147 A JP55136147 A JP 55136147A JP 13614780 A JP13614780 A JP 13614780A JP S6033188 B2 JPS6033188 B2 JP S6033188B2
Authority
JP
Japan
Prior art keywords
gas
heat treatment
heating chamber
chamber
carburizing
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
Application number
JP55136147A
Other languages
Japanese (ja)
Other versions
JPS5760018A (en
Inventor
勝郎 中村
敏男 角田
治雄 国分
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.)
IHI Corp
Original Assignee
IHI 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 IHI Corp filed Critical IHI Corp
Priority to JP55136147A priority Critical patent/JPS6033188B2/en
Publication of JPS5760018A publication Critical patent/JPS5760018A/en
Publication of JPS6033188B2 publication Critical patent/JPS6033188B2/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Description

【発明の詳細な説明】 本発明は、歯車、シャフト、ピン、軸受、ボルト、ナッ
ト等各種の機械部品類や金型の浸炭、窒化、浸炭窒化、
復炭及び焼入、暁ならし、焼戻し等の熱処理に用いると
共に、その他亜鉛鍍金の表面処理、ステンレス鋼板や特
殊合金鋼の光輝焼鈍又は焼準処理、金属焼結処理、各種
金属のロウ付等、更にその他各種金属の熱処理に用い、
少量、多種品用のバッチ操業炉として通した金属熱処理
設備に関する。
Detailed Description of the Invention The present invention is applicable to carburizing, nitriding, carbonitriding, etc. of various mechanical parts such as gears, shafts, pins, bearings, bolts, nuts, etc. and molds.
Used for heat treatments such as recarburization, quenching, normalizing, and tempering, as well as other surface treatments for galvanizing, bright annealing or normalizing for stainless steel plates and special alloy steel, metal sintering, brazing for various metals, etc. , and also used for heat treatment of various other metals.
This article relates to metal heat treatment equipment that is used as a batch operation furnace for small quantities and a wide variety of products.

第1図は最も代表的な従釆の熱処理設備を示すもので、
処理品aは搬送装置b,により洗浄機c,内に搬送され
、該洗浄機c,内にて液体によりその表面に付着してい
る油脂分等の汚れを洗浄された後、搬送装置Q,b3を
介し挿入室d,に搬送される。
Figure 1 shows the most typical subordinate heat treatment equipment.
The processed product a is transported by the transport device b into the washer c, and after being cleaned of dirt such as oil and fat adhering to the surface with liquid in the washer c, the product a is transferred to the transport device Q, It is transported to the insertion chamber d via b3.

この挿入室d,にはガス変成炉h.より供給弁h2また
は供給弁h3と加熱室e,を介しキャリア用の雰囲気ガ
スが供給され、該ガスには酸化防止用に通常可燃性のガ
スが用いられているので、大気側と接する挿入ドアらを
開いて処理品aを挿入する場合にはカーテン用バーナk
‘こより大気侵入を防止するようにしている。そして処
理品aはガス変成炉h,より供給弁h3を介し供給され
た可燃性ガスにより運転初期においては操業可能条件ま
でにアイドル運転された加熱室e.内に挿入装置fによ
り挿入される。更に加熱室e,内には浸炭剤又は窒化剤
等の硬化剤供給容品i,より供給弁i2を介し供給され
た硬化用ガスが入っており、処理品aはこの状態で加熱
され、しかる後冷却又は焼入室g.内にて処理され搬送
装置qにて所定の場所に搬送される。尚図中c2,c3
,e2,e3,g2は夫々各室のドアである。斯かる従
来設備は、機械加工時等により処理品aの表面に付着し
ている油脂分等の汚れを落す熱処理前の洗浄工程が必要
であり、現在は洗浄液による洗浄方法が最も多く使用さ
れている。
In this insertion chamber d, there is a gas conversion furnace h. Atmospheric gas for the carrier is supplied through the supply valve h2 or h3 and the heating chamber e, and since this gas is usually a flammable gas for oxidation prevention, the insertion door in contact with the atmosphere side is When opening the curtain and inserting the processed product a, use the curtain burner k.
'We are trying to prevent atmospheric intrusion. The processed product a is heated to a heating chamber e which is idled to the operable condition in the initial stage of operation by the combustible gas supplied from the gas conversion furnace h through the supply valve h3. is inserted into the interior by an insertion device f. Further, the heating chamber e contains a hardening gas supplied from a hardening agent supply container i such as a carburizing agent or a nitriding agent through a supply valve i2, and the treated product a is heated in this state. Post-cooling or quenching chamber g. The processed material is processed inside and transported to a predetermined location by a transport device q. In addition, c2 and c3 in the figure
, e2, e3, and g2 are the doors of each room, respectively. Such conventional equipment requires a cleaning process before heat treatment to remove dirt such as oil and fat that has adhered to the surface of the processed product a during machining, etc. Currently, the cleaning method using a cleaning liquid is most often used. There is.

しかしながら該方式にあっては、 (1) 洗浄機c,に主として人体に有害なトリクレン
又はアルカリの溶液を使用しているため、使用取扱いと
廃液の処理から公害防止対策が必要であり、また金属腐
蝕性を有するため関連設備の腐蝕防止対策が必要となる
However, in this method, (1) Since the washing machine c mainly uses trichlorene or alkaline solutions that are harmful to the human body, it is necessary to take measures to prevent pollution from handling and waste liquid treatment. Because it is corrosive, it is necessary to take measures to prevent corrosion of related equipment.

(n) 液体を用いた洗浄方法は複雑な形状及び微細な
隙間内まで完全に清浄することができないので、このよ
うな形状で精度を要する処理品の場合、特に浸炭又は窒
化を要する場合は、清浄の不均一性による浸炭又は窒化
のむらが生じてその機能を充分発揮できない問題があり
、従って精密品には不適である。
(n) Cleaning methods using liquids cannot completely clean complex shapes and minute gaps, so in the case of products with such shapes that require precision, especially when carburizing or nitriding is required, There is a problem that uneven carburization or nitriding occurs due to non-uniform cleaning, and the function cannot be fully demonstrated, and therefore it is unsuitable for precision products.

(m) 洗浄液を加熱しなければならないため余分な熱
を要する。
(m) Extra heat is required because the cleaning liquid must be heated.

(W) 洗浄及び乾燥工程と搬送工程が追加されるので
、設備の据付スペースを余分に必要とする。
(W) Since washing and drying steps and transportation steps are added, extra installation space for equipment is required.

等の問題点を有していた。It had the following problems.

一方、前記液体洗浄方法の欠点を解決するため、最近、
加熱洗浄方法が開発されている。
On the other hand, in order to solve the drawbacks of the liquid cleaning method, recently,
A heating cleaning method has been developed.

この方法はバーナからの燃焼熱ガスを処理品に吹き付け
、表面に付着している汚れの主成分である油脂分を気化
燃焼させて取除くものであるが、(1) 処理品に付着
している汚れの燃えた後の煤等が表面に付着または残留
し、特に微細な隙間や孔を有する個所に残るため、重要
である精解な部分において浸炭むらや窒化むら等の熱処
理の加工むらが生ずる。
In this method, hot combustion gas from a burner is blown onto the treated product to vaporize and burn off fats and oils, which are the main components of dirt adhering to the surface of the product. Soot, etc. after burning of dirt adheres or remains on the surface, especially in areas with minute gaps and pores, resulting in uneven heat treatment such as carburizing unevenness and nitriding unevenness in important delicate parts. arise.

(n) 汚れが気化又は燃焼する温度まで処理品を燃焼
ガスで加熱するため、処理品の表面に酸化が生じ、又加
熱洗浄後、炉までの搬送中にも処理品が大気に触れるた
め酸化してしまい、且つ安全な作業性上望ましくない。
(n) Since the treated items are heated with combustion gas to a temperature at which dirt vaporizes or burns, oxidation occurs on the surface of the treated items, and even after heating and cleaning, the treated items are exposed to the atmosphere while being transported to the furnace, resulting in oxidation. This is not desirable in terms of safe workability.

(m) 汚れを気化さけ、そして燃焼させて排出するた
め、これに要するバーナ熱量は処理品の加熱量よりはる
かに多い。又加熱された処理品を大気中に搬送する過程
の熱損失も多い。等の問題点を有していた。
(m) The amount of burner heat required for this is much greater than the amount of heat needed to heat the treated product, since the dirt is vaporized and then burned and discharged. Also, there is a lot of heat loss during the process of transporting the heated processed product into the atmosphere. It had the following problems.

又、前記従来設備においては、ガス変成炉前,を使用し
ており、このガス変成炉h,では、メタン、プロパン等
の炭化水素系のガスと空気とを混合して加熱変成したガ
スを発成させ、これを加熱炉e,のキャリアガスとして
使用しているので、(1) 空気混合して変成させる必
要があるため発生したガスに霧点(水分:QO)が高く
生じ易く、この霧点が高いと、特に浸炭熱処理の場合に
その機能を発揮できず、又品質上有害となる。
In addition, in the conventional equipment, a gas shift furnace is used, and in this gas shift furnace h, a hydrocarbon gas such as methane or propane is mixed with air to generate heated and transformed gas. (1) Since it is necessary to mix air and morph, the generated gas tends to have a high fog point (moisture: QO), and this fog If the point is high, it will not be able to perform its function, especially in the case of carburizing heat treatment, and it will be detrimental to quality.

更にこの霧点を変成ガスの使用変動、即ち流量変動に追
従して安定させるには、現状では非常に困難であり、依
って通常は一定流量のガスを発生させ、使用量減少時に
発生する余分のガスを貯蔵する設備費に問題があり、現
状で無益に消費している。(D) 操業前に露点を安定
させるためには変成炉及び熱処理炉をも含めると数時間
以上のアイドル運転が必要となり、稼働率が悪い。
Furthermore, it is currently extremely difficult to stabilize this fog point by following fluctuations in the use of metamorphic gas, that is, fluctuations in flow rate. There is a problem with the cost of equipment to store gas, and currently it is being consumed pointlessly. (D) In order to stabilize the dew point before operation, if the shift furnace and heat treatment furnace are included, idle operation for several hours or more is required, resulting in poor availability.

(皿) アイドル運転のための時間及び熱損失、加熱し
たガスを再冷却させるため熱損失、及び使用量減少時に
余分ガスの発生による損失となり、省エネルギー及び省
資源に即応しなくなっている。
(Dish) Time and heat loss due to idling operation, heat loss due to re-cooling the heated gas, and loss due to generation of excess gas when usage decreases, making it impossible to immediately respond to energy and resource conservation.

等の問題点を有していた。It had the following problems.

更に、前記設備においては、炉気置換装置がないため、
(1) 雰囲気ガス熱処理の場合、複合熱処理が困難で
ある。
Furthermore, since the above equipment does not have a furnace air displacement device,
(1) In the case of atmospheric gas heat treatment, complex heat treatment is difficult.

例えば、浸炭熱処理を行った後引き続き同一炉内で窒化
熱処理を行うためには、炉内の雰囲気ガスを浸炭用ガス
から窒化用ガスに置換する必要があるが、ガスの置換装
置がないので、浸炭用ガスに窒化用ガスを希釈し乍らパ
ージして窒化雰囲気ガスの条件に達するまでかなりの時
間が掛かり、且つ実使用の熱処理に効を奏しないガスの
消費量が頗る大きく、実用に即しない。(0) 炉の操
業運転開始前のアイドル運転も長時間必要とする。
For example, in order to perform nitriding heat treatment in the same furnace after carburizing heat treatment, it is necessary to replace the atmospheric gas in the furnace from carburizing gas to nitriding gas, but since there is no gas replacement device, It takes a considerable amount of time to dilute the nitriding gas with the carburizing gas and then purge to reach the conditions of the nitriding atmosphere gas, and the amount of gas consumed is large and is not effective for heat treatment in actual use. do not. (0) A long period of idle operation is required before the furnace starts operating.

即ち炉内の定期点検や補修を行った後に炉内の空気や湿
気又は汚れを脱気するに要する時間は前記の雰囲気ガス
の置換と同様に長時間要し、且つそのためのガスの消費
が大きい。等の問題点を有していた。
In other words, it takes a long time to deaerate the air, moisture, or dirt in the furnace after periodic inspections and repairs are performed, just like replacing the atmospheric gas described above, and the gas consumption for this purpose is large. . It had the following problems.

本発明はこれら実情に鑑みなしたもので、加熱装置を有
する密閉可能な前処理室兼熱処理室の下流側に密閉可能
な後処理室を連談し、該両室に真空排気装置と不活性ガ
ス供給装置とを又前処理室兼熱処理室に熱処理剤供給装
置を接続したことを特徴とする金属熱処理設備に係るも
のである。
The present invention was developed in view of these circumstances, and includes a sealable post-processing chamber on the downstream side of a sealable pre-treatment chamber/heat treatment chamber equipped with a heating device, and both chambers are equipped with a vacuum exhaust device and an inert The present invention relates to a metal heat treatment facility characterized in that a gas supply device is connected to a heat treatment agent supply device and a pretreatment chamber/heat treatment chamber is connected to a heat treatment agent supply device.

以下図面を参照しつつ本発明の実施例を説明する。第2
図に示す如く、内部に加熱ヒータ1を備えた前処理室兼
熱処理室(以降加熱室と呼ぶ)2の出口部3の下流側に
、昇降装置4の操作によって加熱室2からの処理品14
を下部に備えた焼入油槽5に入れられるようにした後処
理冷却室6を蓮設し、加熱室2の入口部7に挿入真空ド
ア9を、加熱室2の出口部3と冷却室6の入口部8との
間に熱遮蔽部及び真空気密部より成る中間ドア10を夫
々設け、又冷却室6の出口部11に真空ドア12を設け
、そして各室と各ドアとの間に密閉用シール13を介在
せしめ、更に加熱室2の前方に加熱室2内に処理品14
を挿入するための挿入テーブル15を配設すると共に該
挿入テーブル15の前方に搬送装置16を配置し、且つ
前記冷却室6の後方にも搬送装置17を配置せしめる。
Embodiments of the present invention will be described below with reference to the drawings. Second
As shown in the figure, a processed product 14 is moved from the heating chamber 2 by operating the lifting device 4 to the downstream side of the outlet section 3 of the pretreatment chamber and heat treatment chamber (hereinafter referred to as the heating chamber) 2, which is equipped with a heater 1 therein.
A post-processing cooling chamber 6 is installed, which can be inserted into a quenching oil tank 5 with a lower part, and a vacuum door 9 is inserted into the inlet part 7 of the heating chamber 2, and the outlet part 3 of the heating chamber 2 and the cooling chamber 6 are inserted into the inlet part 7 of the heating chamber 2. An intermediate door 10 consisting of a heat shielding part and a vacuum sealing part is provided between the inlet part 8 of the cooling chamber 6, and a vacuum door 12 is provided at the outlet part 11 of the cooling chamber 6, and a sealing part is provided between each chamber and each door. A seal 13 is interposed therebetween, and a processed product 14 is placed in the heating chamber 2 in front of the heating chamber 2.
An insertion table 15 for inserting the cooling chamber 6 is provided, and a transfer device 16 is provided in front of the insertion table 15, and a transfer device 17 is also provided behind the cooling chamber 6.

又、加熱室2には内部と蓮適するガス配管19を設ける
と共に該ガス配管19には、熱処理剤供給装置21を連
結する。熱処理剤供給装置21は、浸炭剤容器21a、
窒化剤容器21b、酸素ガス容器21c等と該各容器の
供給弁20a、20b、20c等とから成っている。又
前記ガス配管19には、給気弁22を介し窒素ガス容器
18を、又真空弁23aを介し真空ポンプ23を夫々連
結し、更に前記冷却室6に、内部と蓮適するガス配管2
4を接続すると共に、該ガス配管24には、給気弁25
を介し前記窒素ガス容器18を、又真空弁23bを介し
前記真空ポンプ23を夫々接続する。前記構成の熱処理
設備を用いての処理品14の熱処理工程を説明するに、
先ず、トレイ又はバケット等の治具に入った処理品14
が搬送装置16を介し挿入テーブル15上に搬送されて
きたら、大気圧より高い圧力、望ましくは10〜10仇
肋Agの圧力まで給気弁22を開いて加熱室2内に窒素
ガスを供給しておく。
Further, the heating chamber 2 is provided with a gas pipe 19 that is connected to the inside thereof, and a heat treatment agent supply device 21 is connected to the gas pipe 19. The heat treatment agent supply device 21 includes a carburizing agent container 21a,
It consists of a nitriding agent container 21b, an oxygen gas container 21c, etc., and supply valves 20a, 20b, 20c, etc. for each container. Further, a nitrogen gas container 18 is connected to the gas pipe 19 through an air supply valve 22, and a vacuum pump 23 is connected through a vacuum valve 23a, and a gas pipe 2 is connected to the cooling chamber 6, which is connected to the interior thereof.
4 is connected to the gas pipe 24, and an air supply valve 25 is connected to the gas pipe 24.
The nitrogen gas container 18 and the vacuum pump 23 are connected through a vacuum valve 23b and a vacuum valve 23b, respectively. To explain the heat treatment process of the processed product 14 using the heat treatment equipment with the above configuration,
First, the processed product 14 is placed in a jig such as a tray or bucket.
When the nitrogen gas is transported onto the insertion table 15 via the transport device 16, the air supply valve 22 is opened to supply nitrogen gas into the heating chamber 2 to a pressure higher than atmospheric pressure, preferably to a pressure of 10 to 10 Ag. I'll keep it.

このことはドア9が開いた際に大気からの空気の流入を
可及的に防止するためである。そうして加熱室2の入口
部7の真空ドア9を開き、挿入テーブル15により処理
品14を加熱室2内に移送し、真空弁ドア9を閉じる。
次に真空弁23aを開いて加熱室2内のガスをガス管1
9を介し真空ポンプ23によって排気し、加熱室2内を
100皿a以下、望ましくは10肥a以下の可及的高真
空圧にする。そして処理品14の汚れを洗浄するために
同時に処理品14をヒーターによって250午0以上5
00つ0以下、望ましくは約300〜450oo位の可
及的に炭化又は焼成しない範囲の均一温度にて加熱する
。この加熱は次工程の熱処理のための予熱の機能をも兼
ねる。尚処理品14の加熱と真空引きとは同時でも或い
は加熱後真空引きを行うようにしてもよい。又特にガス
循環による熱伝導を高めて短時間に且つ均一に加熱を必
要とする場合には、加熱中又は加熱前に給気弁22を開
いて窒素ガス容器18より窒素ガスをゲージ圧にて加熱
室2内の圧力を0.1〜lk9/係G、望ましくは0.
5〜0.8kg/のGまで加圧して、かつ或いは加熱室
2内ガスをファン、バツフル等のガス循環装置(図示せ
ず:例えば実公昭52−31687号に記載されたもの
)を用いて処理品14内部に接しているガスを循環させ
乍ら加熱した後、真空引きを行うようにすることもでき
る。更に特殊例として真空引き‘こよる減圧と給気によ
る加圧とを操返し乍ら加熱して洗浄効果を可及的に高め
ることもできる。加熱室2内での真空引きによる洗浄が
完了したら、加熱室2内の圧力及び大気圧より高い圧力
、望ましくは10〜10物吻Agの圧力まで給気弁22
を開いて加熱室2内に窒素ガスを給気する。
This is to prevent air from entering from the atmosphere as much as possible when the door 9 is opened. Then, the vacuum door 9 of the entrance portion 7 of the heating chamber 2 is opened, the processed product 14 is transferred into the heating chamber 2 by the insertion table 15, and the vacuum valve door 9 is closed.
Next, open the vacuum valve 23a to drain the gas in the heating chamber 2 to the gas pipe 1.
The heating chamber 2 is evacuated by the vacuum pump 23 through the heating chamber 9, and the inside of the heating chamber 2 is brought to the highest possible vacuum pressure of 100 plates or less, preferably 10 plates or less. Then, in order to clean the dirt on the treated article 14, the treated article 14 is heated at the same time by a heater for more than 250 minutes.
Heating is carried out at a uniform temperature of 0.00 to 0.000°C, preferably about 300 to 450°C, in a range that does not cause carbonization or sintering. This heating also serves as a preheating function for the next step of heat treatment. The heating and evacuation of the processed product 14 may be performed at the same time, or the evacuation may be performed after heating. In particular, when heating is required in a short time and uniformly by increasing heat conduction through gas circulation, the air supply valve 22 is opened during or before heating to supply nitrogen gas from the nitrogen gas container 18 at gauge pressure. The pressure in the heating chamber 2 is set to 0.1 to lk9/G, preferably 0.
Pressure is increased to 5 to 0.8 kg/G, or the gas inside the heating chamber 2 is heated using a gas circulation device such as a fan or a blower (not shown; for example, the one described in Japanese Utility Model Publication No. 52-31687). It is also possible to heat the gas in contact with the inside of the product 14 by circulating it and then evacuate it. Furthermore, as a special example, the cleaning effect can be increased as much as possible by heating while repeating the reduction in pressure caused by evacuation and the increase in pressure by air supply. After cleaning by evacuation in the heating chamber 2 is completed, the air supply valve 22 is closed to a pressure higher than the pressure inside the heating chamber 2 and atmospheric pressure, preferably to a pressure of 10 to 10 mAg.
is opened to supply nitrogen gas into the heating chamber 2.

又処理品14を更に加熱ヒータ1によって熱処理の種類
の目的とする所定の温度まで均一に加熱する。この場合
加熱室2内の基ガスは窒素ガスであり、且つ通常の操業
中においては、各々の熱処理条件の目的とする温度条件
と室内のガス条件は常時温度調整装置(図示せず)と熱
処理剤供給装置21によって調整される。加熱室2内の
処理品14に対し、例えば浸炭熱処理を行う場合には、
鋼種及び浸炭の条件にも依るが、処理品14を前処理工
程で予熱された温度域以降より850〜1050qo、
望ましくは900〜95000まで均一に加熱し、且つ
供給弁20aを開いてて浸炭剤容器21aより浸炭剤を
ガス配管19を通して加熱室2内へ供給する。
Further, the processed product 14 is further uniformly heated by the heater 1 to a predetermined temperature that is the objective of the type of heat treatment. In this case, the base gas in the heating chamber 2 is nitrogen gas, and during normal operation, the target temperature conditions for each heat treatment condition and the gas conditions in the room are constantly controlled by a temperature adjustment device (not shown) and a heat treatment device. It is adjusted by the agent supply device 21. For example, when performing carburizing heat treatment on the processed product 14 in the heating chamber 2,
Although it depends on the steel type and carburizing conditions, the treated product 14 is heated to 850 to 1050 qo from the temperature range preheated in the pretreatment process.
Desirably, it is heated uniformly to 900 to 95,000, and the supply valve 20a is opened to supply the carburizing agent from the carburizing agent container 21a into the heating chamber 2 through the gas pipe 19.

この浸炭剤としては、メタン、プロパン等の炭化水素系
のガス、或いはアルコール類、アニリン類、ヱステル類
等の有機液体を用いる。又、浸炭の後に加熱室2内のガ
スの成分変更を行い、即浸炭を停止させて拡散処理を行
えば、次工程の焼入のための準備熱処理を可能とする。
As this carburizing agent, a hydrocarbon gas such as methane or propane, or an organic liquid such as alcohols, anilines, or esters is used. Further, if the composition of the gas in the heating chamber 2 is changed after carburizing, and the carburizing is immediately stopped and a diffusion treatment is performed, a preparatory heat treatment for the next step of quenching can be performed.

又、加熱室2内の処理品14に対し、ガス軟窒化熱処理
を行う場合には、鋼種及び浸炭の条件にも依るが、処理
品14を前処理工程で予熱された温度城以降より400
〜600午○、望ましくは500〜550℃まで均一に
加熱し、且つ熱処理剤供給装置21内の各供給弁20a
,20b,20cを開いて浸炭剤容器21aから浸炭剤
を、窒化剤容器21bから窒化剤を、酸素ガス容器21
cから酸素ガスをガス配管19を介し加熱室2内へ各々
供給する。この場合、窒化熱処理の促進剤として酸素ガ
スを加熱室2内にて0.3〜2%、望ましくは0.5〜
1%の量を添加することが一つの特徴であり、このこと
が可能なように、熱処理剤供給装置21に酸素ガス容器
21cを設けてある。尚酸素ガスとしては一般用として
圧縮空気を用いる。更に、加熱室2内の処理品14に対
し、浸炭と窒化とを同時に行う場合、即ち浸炭窒化を行
う場合には、供給弁20aと20bを開いて浸炭剤容器
21aから浸炭剤と窒化剤容器21bからの窒化剤とを
加熱室2内に同時に供給し、750〜870℃、望まし
くは750〜800ooまで加熱することにより達成で
きる。
In addition, when performing gas nitrocarburizing heat treatment on the treated product 14 in the heating chamber 2, the treated product 14 is heated to a temperature of 400°C from the temperature range preheated in the pretreatment step, depending on the steel type and carburizing conditions.
~600 pm, preferably uniformly heated to 500 to 550°C, and each supply valve 20a in the heat treatment agent supply device 21
, 20b, 20c are opened, and the carburizing agent is poured from the carburizing agent container 21a, the nitriding agent is poured from the nitriding agent container 21b, and the oxygen gas container 21 is filled.
Oxygen gas is supplied into the heating chamber 2 from the heating chamber 2 through the gas pipe 19. In this case, 0.3 to 2% oxygen gas is added as a promoter of the nitriding heat treatment in the heating chamber 2, preferably 0.5 to 2%.
One of the features is that an amount of 1% is added, and to make this possible, the heat treatment agent supply device 21 is provided with an oxygen gas container 21c. As the oxygen gas, compressed air is used for general purposes. Furthermore, when carburizing and nitriding the product 14 in the heating chamber 2 at the same time, that is, when performing carbonitriding, the supply valves 20a and 20b are opened to drain the carburizing agent and nitriding agent from the carburizing agent container 21a. This can be achieved by simultaneously supplying the nitriding agent from 21b into the heating chamber 2 and heating it to 750 to 870°C, preferably 750 to 800°C.

又、加熱室2内の処理品14に対し、浸炭熱処理に引き
続き窒化熱処理を行う場合、即ち複合熱処理を行う場合
には、真空ポンプ23を作動させ真空弁23aを開き、
加熱室2内の浸炭用ガスをガス配管19を介して排出す
る。
Further, when performing nitriding heat treatment on the processed product 14 in the heating chamber 2 after carburizing heat treatment, that is, when performing composite heat treatment, the vacuum pump 23 is operated and the vacuum valve 23a is opened.
The carburizing gas in the heating chamber 2 is discharged via the gas pipe 19.

そして基ガスとして給気弁22を開いて窒素ガス容器1
8から窒素ガスを、又供給弁20bを開いて窒化剤容器
21bから窒化剤を各々ガス配管19を介して加熱室2
内へ供給する。この間に加熱室2内は、浸炭熱処理温度
から窒化熱処理温度として鋼種及び窒化条件にもよるが
、400〜600qo、望ましくは500L〜550o
oまで温度変更が行われ、浸炭熱処理から窒化熱処理条
件へ設定変更が即可能となる。ところが、加熱室2は、
通常操業時には10〜50肌Agの圧力が掛かるが、加
熱室2内のガスの置換の真空引き時には100岬a以下
、望ましくは100Pa以下の可及的低圧まで真空圧と
するので、真空引きによる減圧からlk9/仇Gの加圧
にまで耐える構造とする。加熱室2内にて所要の熱処理
を施した処理品14は次に冷却室6に搬送されることに
なるが、該冷却室6は、操業開始前の初期時において内
部に残留している後処理に有害なガスを同時に真空引き
によりバ−ジしておく。
Then, open the air supply valve 22 to use the nitrogen gas container 1 as the base gas.
8 and the nitriding agent from the nitriding agent container 21b by opening the supply valve 20b, respectively, to the heating chamber 2 through the gas piping 19.
Supply inside. During this time, the inside of the heating chamber 2 changes from the carburizing heat treatment temperature to the nitriding heat treatment temperature, depending on the steel type and nitriding conditions, from 400 to 600 qo, preferably from 500 to 550 qo.
The temperature is changed to 0, and the settings can be immediately changed from carburizing heat treatment to nitriding heat treatment conditions. However, heating chamber 2
During normal operation, a pressure of 10 to 50 skin Ag is applied, but when vacuuming to replace the gas in the heating chamber 2, the pressure is reduced to the lowest possible pressure of 100 mA or less, preferably 100 Pa or less. It has a structure that can withstand pressures ranging from reduced pressure to lk9/g. The treated product 14 that has been subjected to the required heat treatment in the heating chamber 2 will then be transported to the cooling chamber 6, but the cooling chamber 6 is designed to accommodate the At the same time, gases harmful to the process are purged by vacuuming.

その場合、ガス配管24を介し、真空弁23bを開いて
真空ポンプ23によって排出する。そして真空弁23b
を閉じ、給気弁22を開いて加熱室2の初期基ガスの給
気に合わせて冷却室6も窒素ガスに置換して10〜50
側Agの圧力としておく。冷却室6へのガスの給気は操
業開始初期のみであって操業開始以降は、特殊の場合を
除いて加熱室2の排ガスが必要に応じて使用される。中
間ドア10を操作して加熱室2から冷却室6内に処理品
14を搬送した後、熱処理の種類にもよるが、もし加熱
室2内の残留ガスが可燃性ガスの場合には直ちに真空排
気して窒素ガスに置換する。
In that case, the vacuum valve 23b is opened and the vacuum pump 23 discharges the gas through the gas pipe 24. and vacuum valve 23b
is closed, the air supply valve 22 is opened, and the cooling chamber 6 is also replaced with nitrogen gas in accordance with the supply of initial base gas in the heating chamber 2.
Let the pressure be on the side Ag. Gas is supplied to the cooling chamber 6 only at the beginning of operation, and after the start of operation, exhaust gas from the heating chamber 2 is used as necessary, except in special cases. After operating the intermediate door 10 and transporting the processed product 14 from the heating chamber 2 to the cooling chamber 6, depending on the type of heat treatment, if the residual gas in the heating chamber 2 is a flammable gas, the vacuum is immediately removed. Evacuate and replace with nitrogen gas.

一方加熱室2内の残留ガスが爆発限界以下の成分の場合
には真空排気を行う必要はない。冷却室6内に搬送した
処理品14に対し、例えば油焼入を行う場合には、処理
品14を昇降装置4によって直ちに下降し、下部に設け
てある暁入油槽5の中へ浸潰して急冷することにより行
う。しかる後昇降装置4を再上昇し、競入油の付着して
いる処理品14を暫くの間放置して油切りを行い、その
後ドア12を開いて処理品14を搬送装置17上へ移送
し、ドア12を閉じる。尚前記競入油槽5には、図示し
てないが、均一な油溢とするように加熱ヒータ、熱交換
器、油循環装置等が設けてあり、熱油による冷却、即ち
マルクェンチによる焼入或いは猿房も可能となっている
。一方、油による競入を行わないで、処理品14に対し
ガス冷却又は放冷による除袷を行いたい場合には、昇降
装置4を使用せずに、周囲のガスの熱伝導を介して冷却
する。更に、鋼種によってガス冷却による競入又はガス
による可及的急冷却を行いたい場合には、冷却室6内の
ガス循環ファン及びガスの熱交換器(いずれも図示せず
)を作動させて行う。又ガスによる冷却能力を高めるた
めに、給気弁25を開いて窒素ガスを窒素ガス容器18
からガス配管24を介し冷却室6内へ給気し、ガス圧を
lk9/,泳G以下、通常は0.5〜0.7k9/塊G
の圧力まで上げ、ガスの密度、即ち熱伝達率を高めて冷
却することも可能である。尚、前述の加熱室2、冷却室
6の圧力は別途に設けられた圧力検出器(図示せず)に
よって検出され、各々の給気弁が制御されるようになっ
ており、尚又、加熱室2内の熱処理ガスが各々の目的に
合った成分となるように別途設けられた室内ガスサンプ
リング装置及びガス分析装置(いずれも図示せず:例え
ば特公昭54一28378号に記載されたもの)の出力
信号によって熱処理剤供給装置21の各供給弁20a,
20b,20cが各々の熱処理条件が最適となるように
制御されている。
On the other hand, if the residual gas in the heating chamber 2 has components below the explosive limit, there is no need to perform evacuation. When the processed product 14 transported into the cooling chamber 6 is subjected to oil quenching, for example, the processed product 14 is immediately lowered by the lifting device 4 and immersed in the dawn oil tank 5 provided at the bottom. This is done by rapid cooling. After that, the lifting device 4 is raised again, the product 14 to be treated with the competing oil is left for a while to drain the oil, and then the door 12 is opened and the product 14 to be processed is transferred onto the transport device 17. , close the door 12. Although not shown, the competing oil tank 5 is equipped with a heater, a heat exchanger, an oil circulation device, etc. to ensure uniform oil overflow, and is cooled by hot oil, quenching with a marquench, or A monkey cell is also available. On the other hand, when it is desired to remove the liner by cooling the processed product 14 by gas cooling or cooling without using oil, cooling is performed through heat conduction of the surrounding gas without using the lifting device 4. do. Furthermore, if it is desired to perform competitive cooling with gas or rapid cooling with gas depending on the type of steel, a gas circulation fan and a gas heat exchanger (both not shown) in the cooling chamber 6 are operated. . In addition, in order to increase the cooling capacity of the gas, the air supply valve 25 is opened to supply nitrogen gas to the nitrogen gas container 18.
Air is supplied into the cooling chamber 6 through the gas pipe 24, and the gas pressure is set to less than lk9/G, usually 0.5 to 0.7K9/G.
It is also possible to cool the gas by increasing the pressure to , increasing the density of the gas, that is, the heat transfer coefficient. The pressures in the heating chamber 2 and cooling chamber 6 are detected by separately provided pressure detectors (not shown), and the respective air supply valves are controlled. An indoor gas sampling device and a gas analysis device (none of which are shown; for example, those described in Japanese Patent Publication No. 54-28378) are provided separately so that the heat treatment gas in the chamber 2 has components suitable for each purpose. Each supply valve 20a of the heat treatment agent supply device 21 is activated by the output signal of
The heat treatment conditions of 20b and 20c are controlled to be optimal.

前述の熱処理工程をまとめてみるに、先ず、従来の如き
洗浄専用の独立した洗浄機且つガスパ−ジ専用の前室を
削除して処理品14を加熱室2内において加熱と真空引
きとによる洗浄を行うことが重要な点である。即ち、処
理品14の汚れの主成分は機械加工時に付着する切削油
等の油脂分であるから、炭化しない程度に加熱すること
により油脂分の蒸気圧を高め、真空にすることにより処
理品14の表面からの発散を促進させると同時に取除き
、気化したガス体を分子流とすることによって粘性流に
見られるような微細な隙間や孔内の流れの抵抗を無くし
て完全に洗浄する。従って形状の複雑さに関係なく均一
に洗浄することによって精密な部品でもむらなく熱処理
を可能とし、且つ設備費の低減を図った。そして、冷却
室6において処理品14の加圧冷却を可能とした点も重
要である。
To summarize the heat treatment process described above, first, the conventional independent cleaning machine and the front chamber dedicated to gas purge are removed, and the processed product 14 is cleaned by heating and vacuuming in the heating chamber 2. It is important to do this. That is, since the main component of contamination on the processed product 14 is oil such as cutting oil that adheres during machining, the vapor pressure of the oil and fat is increased by heating to an extent that does not carbonize, and the processed product 14 is evacuated. By promoting the diffusion of gas from the surface and removing it at the same time, by converting the vaporized gas into a molecular flow, the flow resistance in minute gaps and pores that is seen in viscous flow is eliminated, and the gas is completely cleaned. Therefore, by uniformly cleaning regardless of the complexity of the shape, even precision parts can be heat-treated evenly, and equipment costs are reduced. It is also important that the processed product 14 can be cooled under pressure in the cooling chamber 6.

即ち冷却能力を高めるために、窒素ガスを冷却室6内に
給気してガスの圧力を上げることにより、ガスの熱伝達
率を高めて冷却することを可能とした。又、霧点の低い
窒素ガスを加熱室2に使用することも重要な点である。
That is, in order to increase the cooling capacity, nitrogen gas is supplied into the cooling chamber 6 to increase the pressure of the gas, thereby making it possible to increase the heat transfer coefficient of the gas and perform cooling. It is also important to use nitrogen gas with a low fog point in the heating chamber 2.

即ち、霧点の低い窒素ガスを使用するため、真空引きに
有害な水分の流入がなくなり、依って早く真空引きが促
進されるので洗浄効果が充分発揮される。依って運転時
の露点の変動もなく、操業開始前のアイドル時間の短縮
と省エネルギーが達し得られ、同時に品質の向上、安定
を改善できる。更に、加熱室2内のガスの置換を真空引
きによって即可能としたことも重要な点である。
That is, since nitrogen gas with a low fog point is used, there is no inflow of moisture that is harmful to vacuuming, and therefore vacuuming is promoted quickly, so that the cleaning effect is fully exhibited. Therefore, there is no fluctuation in the dew point during operation, and the idle time before the start of operation can be shortened and energy can be saved, and at the same time, quality and stability can be improved. Furthermore, it is also important that the gas in the heating chamber 2 can be immediately replaced by evacuation.

即ち、従来の希釈パージによる置換方法に比べて時間及
びガスの消費量が約1/3〜1/6になると共に、基ガ
スの消費量は、変成炉ガスにように常時加熱室2に一定
量又は準定量的に流す必要がなくなって、操業開始初期
と複合熱処理を行う場合の切換え時のみとなり、熱処理
条件にもよるが加熱室2用では変成炉ガス法の約1/3
〜1/6の消費量となる。しかもここで使用する窒素ガ
スは最も経済的且つ工業的に製造できる99%以上の純
度のもので十分であるため、極めて安価になる。又、他
の重要な点は基ガスを有効に消費された必要最小限の量
だけ補給する点である。即ち、従来の熱処理加熱室内の
ガスの成分調整は常時流入される変成炉ガスの基ガスの
中で相対成分比及び各熱処理ガスの流量の調整を行うた
め各熱処理剤の添加する量も、冶金上の実質消費量に比
べて非常に多量に必要としていた。しかし本発明におい
ては、基ガスは通常は常時殆んど供給せず、熱処理剤が
冶金上の化学反応により実質的に消費されたためによっ
て変る加熱室2内のガスの成分の変化を補う分量だけ補
給すればよいことになる。ちなみに変成炉ガス法の約1
/5〜1/10の消費量である。更に、別の重要点は、
加熱室2のガス制御方法である。
That is, the time and gas consumption are reduced to about 1/3 to 1/6 compared to the conventional replacement method using diluted purge, and the base gas consumption is always constant in the heating chamber 2 like the shift furnace gas. It is no longer necessary to flow quantitatively or semi-quantitatively, and only at the beginning of operation and when switching to complex heat treatment.Depending on the heat treatment conditions, for heating chamber 2, it is about 1/3 of the converter gas method.
The consumption amount is ~1/6. Furthermore, the nitrogen gas used here is extremely economical because it is sufficient to have a purity of 99% or more, which is the most economically and industrially produced nitrogen gas. Another important point is to replenish the base gas in the minimum necessary amount that has been effectively consumed. In other words, in conventional heat treatment heating chamber gas composition adjustment, the relative component ratio and the flow rate of each heat treatment gas are adjusted in the base gas of the shift furnace gas that is constantly inflowed, so the amount of each heat treatment agent added also depends on the metallurgy. A very large amount was required compared to the actual consumption amount above. However, in the present invention, the base gas is normally not supplied at all times, but only in an amount that compensates for changes in the composition of the gas in the heating chamber 2 due to the fact that the heat treatment agent is substantially consumed by metallurgical chemical reactions. All you have to do is replenish it. By the way, the converter gas method has about 1
The consumption amount is 1/5 to 1/10. Furthermore, another important point is that
This is a gas control method for the heating chamber 2.

即ち、椿公昭54−28378号に記載された方法、例
えば雰囲気のメタンガス(CH4)濃度制御系とガス添
加系と雰囲気制御系とを用いて加熱室2はのガス化学反
応によって生ずるガスの圧力と成分の変化とを両面から
制御し、最適の熱処理ガスの条件を高精度に維持するこ
とである。特にメタン濃度制御法は、メタン以外の例え
ばプロパンや有機液体を使用しても熱及び化学反応によ
って生ずる途中の生成物となるメタンガスを制御するこ
とにより効果的且つ容易に加熱室2内のガス制御を行う
ことができる。尚、本発明は前記実施例にのみ限定され
るものではなく、例えば、■ 加熱室内の処理品の数は
第2図では3個であるが、設備の処理能力に応じて変更
してもよいこと、■ 挿入真空ドアを削除し、且つ該部
分を冷却室と一体壁として処理品を冷却室から挿入及び
搬出するようにしてもよいこと、■ 加熱室への処理品
の挿入及び移送方向は、前方からの挿入以外に側面又は
底部或いはそれ以外の方向からでもよく、又移送方式は
、ブツシヤ、ローラコンベア、ウオーキングハース等の
いずれの方式でもよいこと、■ 真空ポンプの設置は2
台以上としてもよく、又補助ポンプを更に追加するよう
にしてもよいこと、■ 客室内の給排管を分離独立型と
しもよいこと、■ 熱処理剤供給装置内の各熱処理剤供
給客器及び供給弁の設備型には限定はなく、例えば同種
熱処理の浸炭剤としてはプロパン、ブタン、又はアルコ
ール類と多種の浸炭剤を設備してもよく、更に気体状で
の熱処理剤でも液体状での熱処理剤でもよいこと、■
基ガスとしては窒素ガスの他にアルゴン等の不活性ガス
を使用してもよく、又各ガスを独立して共に設備しても
よいこと、■ 各供給弁は、特に供給精度を正確に行い
たい場合において初期又は置換時の大流量用と通常操業
時の小流量用との複数型とし各々の熱処理剤に別途に設
けて流量範囲に応じて使い分けてもよいこと、■ 熱処
理剤としては、例えば浸炭剤と窒化剤とを予め混合して
あるものを供給してもよいこと、又特に操業初期用には
基ガスと浸炭剤、及び又は窒化剤を予め混合したものを
供給してもよいこと、等、その他本発明の要旨を逸脱し
ない範囲内で種々変更を加え得ることは勿論である。
That is, by using the method described in Tsubaki Publication No. 54-28378, for example, a methane gas (CH4) concentration control system, a gas addition system, and an atmosphere control system, the heating chamber 2 is controlled to control the pressure of the gas generated by the gas chemical reaction. The goal is to control changes in components from both sides and maintain optimal heat treatment gas conditions with high precision. In particular, the methane concentration control method effectively and easily controls the gas in the heating chamber 2 by controlling methane gas, which is an intermediate product generated by heat and chemical reactions, even when using propane or an organic liquid other than methane. It can be performed. Note that the present invention is not limited to the above-mentioned embodiments; for example, (1) The number of processed products in the heating chamber is three in FIG. 2, but it may be changed depending on the processing capacity of the equipment. ■ The insertion vacuum door may be deleted and this part may be used as an integral wall with the cooling chamber to insert and remove the processed product from the cooling chamber; ■ The direction of insertion and transfer of the processed product into the heating chamber is , In addition to insertion from the front, it may also be inserted from the side, bottom, or any other direction, and the transfer method may be any method such as a bushier, roller conveyor, walking hearth, etc., ■ Vacuum pump installation: 2
■ The supply and exhaust pipes in the passenger cabin may be separated and independent; ■ Each heat treatment agent supplying device in the heat treatment agent supply device and There is no limitation on the equipment type of the supply valve, and for example, various carburizing agents such as propane, butane, or alcohols may be installed as carburizing agents for the same type of heat treatment. A heat treatment agent may also be used, ■
In addition to nitrogen gas, an inert gas such as argon may be used as the base gas, and each gas may be installed independently and together. If the heat treatment agent requires a large flow rate during initial or replacement, and a low flow rate during normal operation, it may be provided separately for each heat treatment agent and used depending on the flow rate range. For example, a premixed carburizing agent and a nitriding agent may be supplied, or a premixed base gas, a carburizing agent, and/or a nitriding agent may be supplied, especially for the initial stage of operation. Of course, various other changes may be made without departing from the gist of the present invention.

如上のように本発明によれば、 ‘i)加熱及び真空下による気化洗浄方式の採用により
洗浄効果が高まり、熱処理効果、特にガスの化学反応に
よる熱処理の均一化により品質向上を図ることができる
As described above, according to the present invention, 'i) The cleaning effect is enhanced by adopting the vaporization cleaning method using heating and vacuum, and the quality can be improved by uniformizing the heat treatment effect, especially the heat treatment by chemical reaction of gas. .

従って微細な隙間或いは孔を有する精密部品や煉結品の
高品質の熱処理が可能である。{ii) 窒素ガス等の
不活性ガスを基ガスとして使用するため、加熱室内の霧
点やガス成分の安定を迅速に可能とし、且つ各ガスの成
分制御が容易となり、依って均一な品質の安定を図るこ
とができる。
Therefore, high-quality heat treatment of precision parts and brickworks having minute gaps or holes is possible. {ii) Since an inert gas such as nitrogen gas is used as the base gas, it is possible to quickly stabilize the fog point and gas components in the heating chamber, and it is easy to control the components of each gas, thereby ensuring uniform quality. Stability can be achieved.

‘剛 加熱室を真空引きによって熱処理ガスの置換を迅
速に行えるようにしたので、複合熱処理を工業的生産設
備として実用化し得る。
Since the heat treatment gas can be quickly replaced by evacuation of the heating chamber, complex heat treatment can be put to practical use as an industrial production facility.

肋 別途専用の洗浄装置とその工程を削除したので、操
業の集約と簡素化を図ることができる。
By eliminating a separate dedicated cleaning device and its process, operations can be consolidated and simplified.

M 公害性のある洗浄剤の削除、大気と接する出入口部
のガスに不活性ガスの使用による爆発性の防止、そして
高熱取扱いの削除等によって安全対策が万全となる。剛
加熱室内のガスの置換とガス成分の安定とを迅速に行
えるので、アイドル運転時間が短縮し且つ操業嫁働率が
向上し、従って生産性を向上させることができる。
M Complete safety measures are achieved by eliminating the use of polluting cleaning agents, using inert gas for the gas at the entrance and exit that comes in contact with the atmosphere to prevent explosiveness, and eliminating the need for handling at high temperatures. Since the gas in the heating chamber can be quickly replaced and the gas components stabilized, the idle operation time can be shortened, the operational efficiency can be improved, and productivity can therefore be improved.

側 基ガス及び各種熱処理剤の消費量が必要最小限で済
むので、操業費の低減と省資源に即応し、且つ実質的に
処理品の加熱に供しない無効加熱の削除により、省エネ
ルギーにも即応することができる。
Since the consumption of side gas and various heat treatment agents is kept to the minimum necessary, it can quickly reduce operating costs and save resources, and it can also quickly respond to energy savings by eliminating ineffective heating that does not actually heat the processed products. can do.

胸 各加熱と冷却の過程において真空から加圧の広範囲
としたので、今後要求される傾向の特殊且つ広範囲の熱
処理条件の要求に対し十分その機能を満足し得る。
Breast Since each heating and cooling process is performed in a wide range from vacuum to pressurization, it is possible to fully satisfy the requirements for special and wide range of heat treatment conditions that will be required in the future.

等の優れた効果を発揮する。Demonstrates excellent effects such as

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

第1図は従来の熱処理設備の一例を示す平面図、第2図
は本発明の熱処理設備を示す平面図である。 2・・・…前処理室兼熱処理加熱室、6…・“冷却室、
10・・…・中間ドア、14…・・・処理品、23・・
・・・・真空ポンプ、18・・・・・・窒素ガス容器、
21・・・・・・熱処理剤供給装置。 第1図 第2図
FIG. 1 is a plan view showing an example of conventional heat treatment equipment, and FIG. 2 is a plan view showing the heat treatment equipment of the present invention. 2...Pre-treatment chamber/heat treatment heating chamber, 6..."Cooling chamber,
10... Intermediate door, 14... Processed product, 23...
...Vacuum pump, 18...Nitrogen gas container,
21...Heat treatment agent supply device. Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 1 加熱装置を有する密閉可能な前処理室兼熱処理室の
下流側に密閉可能な後処理室を連設し、該両室に真空排
気装置と不活性ガス供給装置とを又前処理室兼熱処理室
に熱処理剤供給装置を接続したことを特徴とする金属熱
処理設備。
1. A sealable post-processing chamber is installed downstream of a sealable pre-treatment chamber/heat treatment chamber having a heating device, and a vacuum evacuation device and an inert gas supply device are installed in both chambers. Metal heat treatment equipment characterized by having a heat treatment agent supply device connected to the chamber.
JP55136147A 1980-09-30 1980-09-30 Metal heat treatment equipment Expired JPS6033188B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55136147A JPS6033188B2 (en) 1980-09-30 1980-09-30 Metal heat treatment equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55136147A JPS6033188B2 (en) 1980-09-30 1980-09-30 Metal heat treatment equipment

Publications (2)

Publication Number Publication Date
JPS5760018A JPS5760018A (en) 1982-04-10
JPS6033188B2 true JPS6033188B2 (en) 1985-08-01

Family

ID=15168401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55136147A Expired JPS6033188B2 (en) 1980-09-30 1980-09-30 Metal heat treatment equipment

Country Status (1)

Country Link
JP (1) JPS6033188B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57137417A (en) * 1981-02-17 1982-08-25 Michio Sugiyama Semicontinuous vacuum heat treatment furnace and operating method
US4462577A (en) * 1982-12-16 1984-07-31 C.I. Hayes Inc. Apparatus for gas cooling work parts under high pressure in a continuous heat treating vacuum furnace
JPS6194550U (en) * 1984-11-26 1986-06-18
JPS62270718A (en) * 1986-05-16 1987-11-25 Daido Steel Co Ltd Heat treatment of steel products
KR100657560B1 (en) 2005-09-09 2006-12-14 한국생산기술연구원 Method for heating treatment blade by controlling surfaces pressure of oil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431976A (en) * 1977-08-13 1979-03-09 Norichika Tanaka Multiistage vertical incinerator
JPS54118358A (en) * 1978-03-07 1979-09-13 Toyo Radiator Kk Production of aluminum heat exchanger
JPS54148112A (en) * 1978-05-15 1979-11-20 Nakagawa Kk Bright annealing process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431976A (en) * 1977-08-13 1979-03-09 Norichika Tanaka Multiistage vertical incinerator
JPS54118358A (en) * 1978-03-07 1979-09-13 Toyo Radiator Kk Production of aluminum heat exchanger
JPS54148112A (en) * 1978-05-15 1979-11-20 Nakagawa Kk Bright annealing process

Also Published As

Publication number Publication date
JPS5760018A (en) 1982-04-10

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