JP4317299B2 - Heat treatment jig - Google Patents

Heat treatment jig Download PDF

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Publication number
JP4317299B2
JP4317299B2 JP30098499A JP30098499A JP4317299B2 JP 4317299 B2 JP4317299 B2 JP 4317299B2 JP 30098499 A JP30098499 A JP 30098499A JP 30098499 A JP30098499 A JP 30098499A JP 4317299 B2 JP4317299 B2 JP 4317299B2
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Prior art keywords
carburizing
jig
heat treatment
gas
treatment
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JP2001123219A (en
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澤 均 椛
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株式会社日本テクノ
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【0001】
【発明の属する技術分野】
本発明は、浸炭や浸炭窒化処理、焼入れ,溶体化処理などの各種熱処理において、ワ−ク(非処理物)と共に炉内に持ち込まれるトレーや、複数のワークをトレー上に保持するためのバスケットや支柱,カラー,仕切り板,ワーク受けバーなどの熱処理用治具に係わり、とくに還元性または中性雰囲気、あるいは真空中のように、酸素がほとんど存在しない環境で使用される熱処理用治具に関するものである。
【0002】
【従来の技術】
例えば、歯車やギヤシャフト,カムシャフトなどの浸炭処理において、これらワークは、トレーに載置された状態で、処理炉の加熱室への搬入、加熱室から焼入室への移動、さらには焼入室内の油槽中への急冷などが行われる。
【0003】
また、このとき、複数のワークが炉内で転倒、あるいは移動して、ワーク同士が重なったり、トレーに接触したりすることによって、温度や浸炭層の形成にむらが生じるようなことがないように、各ワークは、バスケットや仕切り板,バーなど、ワーク形状に応じた種々の構造,形状の治具によってトレー上に所定間隔にセッティングされることになる。
【0004】
このような浸炭処理用治具の素材としては、従来、耐熱性を考慮して、ステンレス鋼(主としてSUS310S、SUS304を使用することもある)や、耐熱鋳鋼(SCH13,SCH15)が用いられてきた。
【0005】
【発明が解決しようとする課題】
しかし、このような浸炭処理用治具においては、ワークと共に900〜950℃の浸炭性雰囲気内で加熱されたのち、油中に急冷されることから、上記のようにステンレス鋼や耐熱鋳鋼を用いて製造されていても、このような浸炭性雰囲気に繰り返し曝され、加熱−急冷の熱応力を繰り返し受けている間に、浸炭されて脆くなると共に、熱変形(クリープ)が進み、焼入れ時の熱衝撃によって割れが発生することがあることから、耐用寿命が短く、治具の材料費が高いことと相俟ってコストアップ要因のひとつとなっていた。また、耐久性を確保するためには、治具の肉厚を増すことが必要となり、結果として治具の重量が増し、持ち運びやワークセッティング時の作業性、さらには加熱時の熱効率が悪化するという問題点があった。
【0006】
さらに、上記のような浸炭処理用治具を用いた場合には、治具の変形が著しいために、ワークのセッティングや処理後のワークの取出しに際して、作業ロボットのような専用機を使用することができず、無人化,省人化など、思い切った合理化ができないという問題点があり、このような問題点を解消することが上記のような浸炭処理における課題となっていた。
【0007】
一方、例えば、高速度工具鋼の真空焼入れのように、焼入れ温度がさらに高温(1200〜1300℃)となる熱処理には、インコネルのような超合金材料やMoのような高融点金属材料からなる熱処理用治具が使用されていたが、このような高温処理用治具においても、材料費がさらに高額になることに加えて、熱変形に基づく上記のような問題点を解消することはできず、基本的に上記浸炭処理用治具と同様の課題を有していた。
【0008】
【発明の目的】
本発明は、浸炭処理用治具を始めとする従来の熱処理用治具における上記課題に着目してなされたものであって、浸炭や窒化の影響を受けることがなく、高温強度に優れ、急速加熱や焼入れ時の熱衝撃にも耐える優れた耐久性を有し、熱変形せず、ワークのセッティングや処理後の取出しにロボットなどを適用して自動化を図ると共に、軽量化に基づく熱容量の低減が可能となり、省人化および省エネルギーによるコスト削減を達成することができる熱処理用治具を提供することを目的としている。
【0009】
【課題を解決するための手段】
本発明に係わる熱処理用治具は、炭化水素系ガスによる浸炭処理、又は炭化水素系ガスとアンモニア系ガスによる浸炭窒化処理に用いられるものであって、C/Cコンポジットから形成され、ワークを載置した状態で処理炉の加熱室内に移送され、非酸化性雰囲気又は真空中においてワークと共に加熱、油冷される構成としたことを特徴としており、熱処理用治具におけるこのような構成を前述した従来の課題を解決するための手段としている。
【0012】
【発明の作用】
C/Cコンポジットは、強化材としての炭素繊維と炭素マトリックスの複合材であって、
(1) 金属材料と較べて高温下でも強度低下がなく、軽量化が可能
(2) 耐熱衝撃性に優れ、急加熱や急冷却に耐えることができる
(3) 破壊靭性値が高く、手荒に扱っても破損しにくい
(4) 酸化以外は化学的に極めて安定
(5) 熱膨張係数が小さく、温度変化に対する寸法精度の信頼性が高い
など、優れた特性を有している。
【0013】
したがって、C/Cコンポジット材を用いて形成した本発明に係わる熱処理用治具においては、上記のように浸炭処理に適用したとしても、浸炭によって治具が脆くなったり、熱変形したり、焼入れ時の熱衝撃によって割れたりすることがなく、しかも浸炭ガスには酸化性ガス(O,H0,COなど)がほとんど含まれないので、500℃以上の高温で酸化されるというC/Cコンポジット唯一の欠点が顕現することもなく、耐用期間が長くなると共に、ロボットや専用機の使用による省人化や軽量化による省エネルギーに結び付くものとなる。
【0014】
【発明の実施の形態】
本発明に係わる熱処理用治具は、上記のようにC/Cコンポジットから形成され、炭化水素系ガスによる浸炭処理や、炭化水素系ガスとアンモニア系ガスによる浸炭窒化処理、さらにその後の焼入れ処理に用いるものであって、ワークを載置した状態で処内に移送された後、非酸化性雰囲気又は真空中においてワークと共に加熱され、ワークの処理が終了後、ワークと共に油冷されることになる。
【0015】
また、浸炭あるいは浸炭窒化処理のうち、従来のガス浸炭やガス浸炭窒化においては、天然ガスやプロパンガスなどの変成ガス、あるいは有機溶剤の熱分解ガス(有機溶剤滴下式)が浸炭性ガスとして用いられる。しかしながら、これらのガスには微量のCOやHOが混在するため、このようなガス浸炭あるいはガス浸炭窒化に本発明に係わるC/Cコンポジット製熱処理用治具を用いた場合には、治具に多少の酸化消耗が避けられない。
【0016】
これに対し、窒素雰囲気(非酸化性雰囲気)又は真空中でワークを加熱したのち、炉内に炭化水素系ガス、あるいは炭化水素系ガスとアンモニア系ガスを送給する浸炭、あるいは浸炭窒化処理方法においては、上記のような酸化性ガスを一切使用せず、しかも処理中に生成されることもないことから、本発明に係わるC/Cコンポジット製熱処理用治具をこのような浸炭処理あるいは浸炭窒化処理に適用した場合には、治具の酸化消耗が完全に防止されることになる。なお、このような浸炭処理あるいは浸炭窒化処理において、炉内に浸炭用炭素源として供給される炭化水素系ガスとしては、例えばメタンやプロパン,ブタンのような飽和炭化水素ガス、あるいはアセチレンやエチレンなどの不飽和炭化水素ガスを用いることができる。
【0017】
なお、本発明に係わる熱処理用治具に用いるC/Cコンポジットは、材料コストが高いことから、従来では航空・宇宙・防衛産業などを中心に使用されてきたが、近年になって製造方法が急速に発展し、コストが下がることによって需要が伸び、需要増に基づく量産効果によってさらにコストが下がるという好循環が働き、現状ではステンレス鋼や耐熱鋳鋼製治具の1.5〜2倍程度のコストでC/Cコンポジット製治具の製作が可能である。
【0018】
【実施例】
以下、本発明を実施例に基づいてさらに具体的に説明する。
【0019】
まず、図1に示すような形状を備えたC/Cコンポジット製の熱処理用治具1(外形寸法:640mmW×640mmL×230mmH,重量:約5.7kg,熱容量:約4.3kJ/℃)を用意し、当該治具1に、クロムモリブデン鋼SCM415からなるギヤシャフト(頭部ギヤ径:約70mm,シャフト部径:約25mm,長さ:約200mm)を、そのシャフト部を前記治具1に設けた升目(48×48mm、11×11個)内に挿通した状態にセットした。このとき、被処理物であるギヤシャフトが互いに接触しないように、ひとつ置きとして隣接する升目を空けた状態に合計60本のギヤシャフトをセットした。このようにそれぞれ60本のギヤシャフトをセットした治具1を3段に重ねて、図2に示す構造の浸炭炉10に装入した。
【0020】
一方、同様のサイズ,構造を備え、ステンレス鋼SUS310Sからなる治具(重量:約26.9kg,熱容量:13.5kJ/℃)に、同種のギヤシャフトを同様にセットし、上記C/Cコンポジット製治具と共に、浸炭炉10に装入し、図3に示す条件のもとに上記ギヤシャフトに浸炭処理を施した。そして、このような浸炭処理に、同一の治具を繰り返し使用した場合の耐用回数について、上記C/Cコンポジット製治具とステンレス鋼製治具とを比較した。
【0021】
すなわち、まず、浸炭炉10の前室11の入口側に備えた入口側真空扉11aを解放し、ギヤシャフトをセットした上記C/Cコンポジット製治具およびステンレス鋼製治具をそれぞれ前室11内に入れ、真空扉11aを閉じた状態で、真空排気装置を作動させて前室11および加熱室12内の空気をパージしたのち、図外のガス制御装置を介して窒素ガスを導入し、大気圧に復圧することにより前室11および加熱室12内を窒素ガスに置換した。
【0022】
次に、前室11の内側真空扉11bおよび加熱室12の耐熱扉12aを開放すると共に、炉内搬送装置13を作動させて両治具を加熱室12内に移動させたのち、真空扉11bおよび耐熱扉12aを閉じ、攪拌用のファン14を回転させながら、昇温を行うべく加熱室12のラジアントチュ−ブヒータ15に通電を開始した。
【0023】
加熱室12の温度が所定の浸炭温度930℃に到達した時点で、ガス制御装置から浸炭ガスとして6L(標準状態)のアセチレンガスを供給し、これを5分ごとに12回繰り返した。なお、このとき、アセチレンガスと共にアンモニアガスを供給することにより、浸炭窒化することができる。こののち、当該温度に50分保持したのち、焼入温度である850℃に降温し、被処理物であるギヤシャフトの温度を均一化するために、この温度に20分間保持した。
【0024】
そして、内側真空扉11bおよび耐熱扉12aを開放すると共に、炉内搬送装置13を作動させて、加熱室12から引き出し、昇降装置16の下降作動によって両治具をギヤシャフトとともに油槽17内に浸漬し、ギヤシャフトに焼入れを施した。なお、図2において、符号18は加熱室12内の温度を測定するための熱電対、符号19および20は、油槽17中の焼入油の温度調節を行うためのそれぞれチューブヒータおよび攪拌ファンである。
【0025】
こののち、各治具を解体して浸炭焼入されたギヤシャフトを取り出したのち、これらの治具に同種のギヤシャフトを再度同様にセットし、同様の浸炭処理を繰り返すことにより、C/Cコンポジット製治具およびステンレス鋼製治具の耐用寿命を比較調査した。
【0026】
この結果、ステンレス鋼製治具の場合には、徐々に治具の変形が進行し、ほぼ300回程度の浸炭処理で治具に割れが生じて使用できなくなった。
【0027】
これに対して、C/Cコンポジット製治具においては、処理を繰り返しても変形や割れなどがほとんど発生せず、少なくとも600回以上の連続繰り返し処理を行っても、なお支障なく使用が可能であることが確認された。
【0028】
【発明の効果】
本発明に係わる熱処理用治具は、C/Cコンポジットから形成されたものであるから、高温強度に優れ、酸化性雰囲気において500℃以上に加熱されない限り、化学的に極めて安定であり、炭化水素系ガスを用いた浸炭処理や、炭化水素系ガスとアンモニア系ガスを用いた浸炭窒化処理に適用し、ワークと共に加熱、さらに油冷した場合にも、熱変形や、浸炭や窒化による脆化や、熱衝撃による割れなどが生じることがないので、耐用寿命が大幅に向上すると共に、ロボットや専用機を使用することによってワークのセッティングや処理後のワーク取出し作業を自動化することができ、省人化と軽量化による省エネルギーとが相俟って熱処理コストの大幅な削減が可能になるという極めて優れた効果をもたらすものである。
【図面の簡単な説明】
【図1】本発明の一実施例に係わる熱処理用治具の形状を示す斜視図である。
【図2】(a)および(b)は本発明の実施例に用いた浸炭炉の構造を示すそれぞれ正面図および側面図である。
【図3】本発明の実施例に用いた浸炭処理条件を示す図である。
【符号の説明】
1 熱処理用治具
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tray that is brought into a furnace together with a work (untreated material) in various heat treatments such as carburizing, carbonitriding, quenching, and solution treatment, and a basket for holding a plurality of workpieces on the tray. In particular, it relates to heat treatment jigs such as struts, collars, partition plates, work receiving bars, etc., especially heat treatment jigs that are used in environments where there is almost no oxygen, such as in reducing or neutral atmospheres or in vacuum. Is.
[0002]
[Prior art]
For example, in carburizing treatment of gears, gear shafts, camshafts, etc., these workpieces are placed on the tray, and are carried into the heating chamber of the processing furnace, moved from the heating chamber to the quenching chamber, and further quenched. Rapid cooling into an indoor oil tank is performed.
[0003]
Also, at this time, there is no possibility that unevenness of temperature or carburized layer formation occurs when a plurality of workpieces fall or move in the furnace and the workpieces overlap each other or come into contact with the tray. In addition, each work is set at a predetermined interval on the tray by jigs having various structures and shapes corresponding to the work shape, such as a basket, a partition plate, and a bar.
[0004]
As a material for such a carburizing jig, stainless steel (mainly SUS310S or SUS304 may be used in some cases) or heat-resistant cast steel (SCH13, SCH15) has been used in consideration of heat resistance. .
[0005]
[Problems to be solved by the invention]
However, in such a carburizing jig, since it is heated in a carburizing atmosphere at 900 to 950 ° C. together with the workpiece and then rapidly cooled in oil, stainless steel or heat-resistant cast steel is used as described above. Even if it is manufactured, it is repeatedly exposed to such a carburizing atmosphere and repeatedly subjected to heating-quenching thermal stress, and it becomes carburized and becomes brittle, and thermal deformation (creep) progresses, Since cracking may occur due to thermal shock, it has been one of the causes of cost increase in combination with short service life and high jig material costs. In addition, in order to ensure durability, it is necessary to increase the thickness of the jig. As a result, the weight of the jig increases, and the workability during carrying and setting of workpieces, and the thermal efficiency during heating deteriorate. There was a problem.
[0006]
Furthermore, when using a carburizing jig as described above, the deformation of the jig is significant, so a dedicated machine such as a work robot should be used when setting the workpiece and taking out the workpiece after processing. However, there is a problem that drastic rationalization is not possible, such as unmanned operation and labor saving, and solving such a problem has been a problem in the carburizing treatment as described above.
[0007]
On the other hand, for example, the heat treatment where the quenching temperature becomes higher (1200 to 1300 ° C.), such as vacuum quenching of high-speed tool steel, is made of a superalloy material such as Inconel or a refractory metal material such as Mo. Heat treatment jigs were used, but even with such high temperature treatment jigs, in addition to the higher material costs, the above-mentioned problems due to thermal deformation cannot be solved. However, it basically had the same problems as the carburizing jig.
[0008]
OBJECT OF THE INVENTION
The present invention has been made paying attention to the above-mentioned problems in conventional jigs for heat treatment including a carburizing jig, and is not affected by carburizing or nitriding, has excellent high-temperature strength, and is quick. It has excellent durability to withstand thermal shock during heating and quenching, does not thermally deform, and is automated by applying robots etc. for workpiece setting and removal after processing, and also reduces heat capacity based on weight reduction Therefore, an object of the present invention is to provide a heat treatment jig that can achieve cost savings through labor saving and energy saving.
[0009]
[Means for Solving the Problems]
The jig for heat treatment according to the present invention is used for carburizing treatment with a hydrocarbon gas or carbonitriding treatment with a hydrocarbon gas and an ammonia gas, and is formed from a C / C composite and mounted with a workpiece. is transferred to the heating chamber of the processing furnace at location state, heated together with the workpiece in a non-oxidizing atmosphere or in a vacuum, it has an oil-cooled Ru configuration is characterized by, the aforementioned such a structure in the heat treatment jig It is a means for solving the conventional problems.
[0012]
[Effects of the Invention]
C / C composite is a composite of carbon fiber and carbon matrix as a reinforcing material,
(1) Compared to metal materials, there is no reduction in strength even at high temperatures, allowing for weight reduction
(2) Excellent thermal shock resistance and can withstand rapid heating and cooling
(3) Fracture toughness value is high, and it is hard to break even if handled roughly
(4) Chemically extremely stable except for oxidation
(5) Excellent characteristics such as low thermal expansion coefficient and high reliability of dimensional accuracy against temperature changes.
[0013]
Therefore, in the heat treatment jig according to the present invention formed using the C / C composite material, even when applied to the carburizing treatment as described above, the jig becomes brittle, thermally deformed, or quenched by carburizing. C that is not cracked due to thermal shock at the time, and that the carburizing gas contains almost no oxidizing gas (O 2 , H 2 0, CO 2, etc.) and is therefore oxidized at a high temperature of 500 ° C. or higher. The only drawbacks of the / C composite are not manifested, and the service life is extended, and the use of robots and special-purpose machines leads to energy savings by reducing labor and weight.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The jig for heat treatment according to the present invention is formed from a C / C composite as described above, and is used for carburizing treatment with hydrocarbon gas, carbonitriding treatment with hydrocarbon gas and ammonia gas , and subsequent quenching treatment. After being transferred into the process with the work placed, it is heated together with the work in a non-oxidizing atmosphere or in a vacuum, and after the processing of the work is finished, it is oil-cooled with the work. .
[0015]
Also, among conventional carburizing and carbonitriding processes, carburizing and carbonitriding processes use natural gas, propane gas or other modified gas, or organic solvent pyrolysis gas (organic solvent dripping type) as carburizing gas. It is done. However, since a small amount of CO 2 and H 2 O are mixed in these gases, when the jig for heat treatment made of C / C composite according to the present invention is used for such gas carburizing or gas carbonitriding, Some oxidative wear on the jig is inevitable.
[0016]
On the other hand, carburizing or carbonitriding treatment method in which a workpiece is heated in a nitrogen atmosphere (non-oxidizing atmosphere) or in a vacuum and then a hydrocarbon-based gas, or a hydrocarbon-based gas and an ammonia-based gas are fed into the furnace. Since no oxidizing gas as described above is used, and it is not generated during processing, the C / C composite heat treatment jig according to the present invention is used for such carburizing or carburizing. When applied to the nitriding treatment, the oxidation consumption of the jig is completely prevented. In such a carburizing process or carbonitriding process, the hydrocarbon gas supplied as a carbon source for carburizing in the furnace is, for example, a saturated hydrocarbon gas such as methane, propane or butane, or acetylene or ethylene. The unsaturated hydrocarbon gas can be used.
[0017]
The C / C composite used in the heat treatment jig according to the present invention has been used mainly in the aviation, space, defense industry and the like because of its high material cost. A rapid cycle of rapid development, increasing demand due to lower costs, and further reducing costs due to mass production effects based on increased demand, is currently about 1.5 to 2 times that of jigs made of stainless steel or heat-resistant cast steel C / C composite jigs can be manufactured at low cost.
[0018]
【Example】
Hereinafter, the present invention will be described more specifically based on examples.
[0019]
First, a heat treatment jig 1 made of C / C composite having a shape as shown in FIG. 1 (external dimensions: 640 mmW × 640 mmL × 230 mmH, weight: about 5.7 kg, heat capacity: about 4.3 kJ / ° C.) A gear shaft (head gear diameter: about 70 mm, shaft portion diameter: about 25 mm, length: about 200 mm) made of chromium molybdenum steel SCM415 is prepared in the jig 1, and the shaft portion is attached to the jig 1. It set in the state penetrated in the provided mesh (48x48 mm, 11x11 pieces). At this time, a total of 60 gear shafts were set in a state in which adjacent meshes were opened so that the gear shafts to be processed did not contact each other. Thus, the jigs 1 each set with 60 gear shafts were stacked in three stages and charged into the carburizing furnace 10 having the structure shown in FIG.
[0020]
On the other hand, the same type of gear shaft is similarly set in a jig (weight: about 26.9 kg, heat capacity: 13.5 kJ / ° C) having the same size and structure and made of stainless steel SUS310S. Together with the jig, the carburizing furnace 10 was charged and the gear shaft was carburized under the conditions shown in FIG. And the said C / C composite jig | tool and the stainless steel jig | tool were compared about the durable frequency when the same jig | tool was repeatedly used for such a carburizing process.
[0021]
That is, first, the inlet-side vacuum door 11a provided on the inlet side of the front chamber 11 of the carburizing furnace 10 is released, and the C / C composite jig and the stainless steel jig set with the gear shaft are set in the front chamber 11 respectively. In the state where the vacuum door 11a is closed and the vacuum exhaust device is operated to purge the air in the front chamber 11 and the heating chamber 12, nitrogen gas is introduced through a gas control device (not shown), By returning to atmospheric pressure, the front chamber 11 and the heating chamber 12 were replaced with nitrogen gas.
[0022]
Next, the inner vacuum door 11b of the front chamber 11 and the heat-resistant door 12a of the heating chamber 12 are opened, and both the jigs are moved into the heating chamber 12 by operating the in-furnace transfer device 13, and then the vacuum door 11b. The radiant tube heater 15 of the heating chamber 12 was energized to increase the temperature while closing the heat-resistant door 12a and rotating the stirring fan 14.
[0023]
When the temperature of the heating chamber 12 reached a predetermined carburizing temperature of 930 ° C., 6 L (standard state) of acetylene gas was supplied as a carburizing gas from the gas control device, and this was repeated 12 times every 5 minutes. At this time, carbonitriding can be performed by supplying ammonia gas together with acetylene gas. After that, the temperature was maintained for 50 minutes, and then the quenching temperature was lowered to 850 ° C., and this temperature was maintained for 20 minutes in order to equalize the temperature of the gear shaft as the object to be processed.
[0024]
Then, the inner vacuum door 11b and the heat-resistant door 12a are opened, the furnace transfer device 13 is operated, pulled out from the heating chamber 12, and both jigs are immersed in the oil tank 17 together with the gear shaft by the lowering operation of the lifting device 16. The gear shaft was quenched. In FIG. 2, reference numeral 18 denotes a thermocouple for measuring the temperature in the heating chamber 12, and reference numerals 19 and 20 denote a tube heater and a stirring fan for adjusting the temperature of the quenching oil in the oil tank 17, respectively. is there.
[0025]
After that, after disassembling each jig and taking out the carburized and quenched gear shaft, the same type of gear shaft is again set in these jigs in the same manner, and the same carburizing process is repeated. A comparative study was conducted on the service life of composite jigs and stainless steel jigs.
[0026]
As a result, in the case of a stainless steel jig, the deformation of the jig gradually progressed, and the jig was cracked after approximately 300 times of carburizing treatment, so that it could not be used.
[0027]
In contrast, C / C composite jigs are hardly deformed or cracked even when the process is repeated, and can be used without any problems even if the process is repeated at least 600 times. It was confirmed that there was.
[0028]
【The invention's effect】
Heat treatment jig according to the present invention, since those formed from C / C composite, excellent high-temperature strength, unless heated to 500 ° C. or higher in an oxidizing atmosphere, is chemically very stable, hydrocarbon It is applied to carburizing treatment using a gas and carbonitriding treatment using a hydrocarbon gas and an ammonia gas, and when it is heated with a workpiece and then cooled with oil , thermal deformation, embrittlement due to carburizing and nitriding, Because there is no cracking due to thermal shock, the service life is greatly improved. By using a robot or special machine, workpiece setting and workpiece removal after processing can be automated, saving labor. Combined with energy saving and energy saving, the heat treatment cost can be drastically reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the shape of a heat treatment jig according to an embodiment of the present invention.
FIGS. 2A and 2B are a front view and a side view, respectively, showing the structure of a carburizing furnace used in an example of the present invention.
FIG. 3 is a diagram showing carburizing conditions used in an example of the present invention.
[Explanation of symbols]
1 Heat treatment jig

Claims (1)

炭化水素系ガスによる浸炭処理、又は炭化水素系ガスとアンモニア系ガスによる浸炭窒化処理に用いられる熱処理用治具であって、C/Cコンポジットから形成され、ワークを載置した状態で処理炉の加熱室内に移送され、非酸化性雰囲気又は真空中においてワークと共に加熱、油冷されることを特徴とする熱処理用治具。 A heat treatment jig used for carburizing treatment with a hydrocarbon-based gas or carbonitriding treatment with a hydrocarbon-based gas and an ammonia-based gas, which is formed from a C / C composite and in a state where a workpiece is placed is transferred into the heating chamber, heating with the workpiece in a non-oxidizing atmosphere or in vacuum, the oil-cooled heat treatment jig according to claim Rukoto.
JP30098499A 1999-10-22 1999-10-22 Heat treatment jig Expired - Lifetime JP4317299B2 (en)

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KR20050058320A (en) * 2005-05-26 2005-06-16 주식회사 삼락열처리 Heat treatment jig for bearing
DE102009000201B4 (en) * 2009-01-14 2018-06-21 Robert Bosch Gmbh Charging rack and quenching device with charging rack
DE102009041041B4 (en) * 2009-09-10 2011-07-14 ALD Vacuum Technologies GmbH, 63450 Method and apparatus for hardening workpieces, as well as work hardened workpieces
JP5965226B2 (en) * 2012-07-04 2016-08-03 東洋炭素株式会社 Heat treatment furnace tray
JP6013940B2 (en) * 2013-02-26 2016-10-25 東洋炭素株式会社 Oil quenching heat treatment furnace tray manufacturing method and carburizing method
JP6588691B2 (en) * 2014-07-18 2019-10-09 東洋炭素株式会社 C / C composite molded body, manufacturing method thereof, and heat treatment jig using C / C composite molded body
JP6491072B2 (en) * 2015-10-15 2019-03-27 豊田鉄工株式会社 Heating device

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