JPH1121631A - Method for hardening thin sheet parts - Google Patents
Method for hardening thin sheet partsInfo
- Publication number
- JPH1121631A JPH1121631A JP18140297A JP18140297A JPH1121631A JP H1121631 A JPH1121631 A JP H1121631A JP 18140297 A JP18140297 A JP 18140297A JP 18140297 A JP18140297 A JP 18140297A JP H1121631 A JPH1121631 A JP H1121631A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- thin plate
- quenching
- work
- plate component
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、薄板部品の焼入れ
方法に関し、より特定的には、薄板部品が少なくとも浸
炭室と冷却室とを連続的に移動可能な連続炉において薄
板部品を焼入れする方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for quenching sheet parts, and more particularly, to a method for quenching sheet parts in a continuous furnace in which the sheet parts can move at least continuously between a carburizing chamber and a cooling chamber. It is about.
【０００２】[0002]
【従来の技術】ニードル軸受（針状ころ軸受）の外輪や
スラスト軸受軌道輪には、１ｍｍ程度もしくはそれ以下
の厚みの薄板が用いられる場合がある。このような薄板
部品には、たとえば軸受などの各用途に応じた機能を果
たすため、ある程度の硬さが必要とされる。この機能に
応じた硬さを得るためには、薄板部品に浸炭直後に焼入
れを行なう必要があり、このような処理は、薄板部品が
炉内で連続または断続的に移動できる搬送機構を装置し
た加熱炉、いわゆる連続炉等で行なう必要があった。2. Description of the Related Art A thin plate having a thickness of about 1 mm or less is sometimes used for an outer ring of a needle bearing (needle roller bearing) and a thrust bearing race. Such a thin plate component needs to have a certain degree of hardness in order to fulfill a function corresponding to each application such as a bearing. In order to obtain the hardness corresponding to this function, it is necessary to quench the thin sheet component immediately after carburizing, and such a treatment is provided with a transport mechanism that allows the thin sheet component to move continuously or intermittently in the furnace. This had to be performed in a heating furnace, a so-called continuous furnace.
【０００３】そして従来では、このような連続炉等で、
薄板部品に浸炭処理を施した直後に油などの液体を用い
て焼入れを行なうことで、各用途に応じた硬さを得てい
た。Conventionally, in such a continuous furnace,
Immediately after carburizing the thin plate component, quenching is performed using a liquid such as oil to obtain hardness corresponding to each application.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、油など
の液体を用いて焼入れを行なった場合、薄板部品の冷却
速度が過大となってしまう。冷却速度が過大となると、
薄板部品が非常に薄い厚みを有していることもあって、
薄板部品に熱処理歪み（反り歪み）が生じてしまう。特
にニードル軸受（針状ころ軸受）の外輪やスラスト軸受
軌道輪などに熱処理歪みが生じた場合には、転動体が正
常に動作し難くなり、軸受の性能劣化につながる。した
がって、この歪みを取るために歪み取りを行なう必要が
あるという問題点があった。However, when quenching is performed using a liquid such as oil, the cooling rate of the thin plate component becomes excessive. If the cooling rate becomes excessive,
Because the thin plate parts have a very thin thickness,
Heat treatment distortion (warpage distortion) occurs in the thin plate component. In particular, when heat treatment distortion occurs in the outer ring of the needle bearing (needle roller bearing), the thrust bearing raceway, or the like, the rolling element becomes difficult to operate normally, leading to deterioration in the performance of the bearing. Therefore, there is a problem that it is necessary to remove the distortion in order to remove the distortion.
【０００５】また、従来では、薄板部品をたとえば油な
どの液体中に浸漬することにより冷却するため、薄板部
品の表面に油などの液体が付着してしまう。このため、
薄板部品から液体を除去するための洗浄工程が必要にな
るという問題点もあった。Conventionally, since a thin plate component is cooled by immersing it in a liquid such as oil, liquid such as oil adheres to the surface of the thin plate component. For this reason,
There is also a problem that a cleaning step for removing liquid from the thin plate component is required.
【０００６】本発明は、上記のような問題点を解決する
ためになされたもので、たとえば軸受などの機能に応じ
た硬さを容易に得るとともに、歪み取りや洗浄などの工
程が不要な薄板部品の焼入れ方法を提供することであ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. For example, a thin plate which easily obtains hardness corresponding to the function of a bearing or the like and does not require steps such as distortion removal and cleaning is provided. It is to provide a method of hardening a part.
【０００７】[0007]
【課題を解決するための手段】本発明の薄板部品の焼入
れ方法は、薄板部品が少なくとも浸炭室と冷却室とを連
続的に移動可能な連続炉において、浸炭室にて浸炭され
た後、速やかに冷却室にて焼入れされる薄板部品の焼入
れ方法であって、焼入れは、気体により薄板部品を冷却
することにより行なわれる。SUMMARY OF THE INVENTION According to the present invention, there is provided a method for quenching a thin plate component, wherein the thin plate component is rapidly carburized in a carburizing chamber in a continuous furnace capable of continuously moving at least a carburizing chamber and a cooling chamber. Is a method of quenching a thin plate part which is quenched in a cooling chamber, wherein the quenching is performed by cooling the thin plate part with a gas.
【０００８】本発明の薄板部品の焼入れ方法では、気体
により薄板部品が焼入れされる。気体は、液体よりも薄
板部品の冷却速度が遅く、また気体の圧力や種類の調整
により容易に薄板部品の冷却速度を制御できる。このた
め、薄板部品に、機能、用途に応じた硬さを与えるとと
もに熱処理歪みの発生を抑制することができる。したが
って、歪み取りが不要となり、薄板部品の処理工程の削
減が可能となる。In the method for quenching a thin plate component according to the present invention, the thin plate component is quenched by gas. Gas is slower in cooling the thin plate part than liquid, and the cooling speed of the thin plate part can be easily controlled by adjusting the pressure and type of the gas. For this reason, it is possible to provide the thin plate component with hardness according to the function and application, and to suppress the occurrence of heat treatment distortion. Therefore, it is not necessary to remove the distortion, and the number of processing steps for the thin plate component can be reduced.
【０００９】また、気体による焼入れでは、液体による
焼入れのように薄板部品に付着した液体を洗浄する工程
が不要となる。したがって、薄板部品の洗浄工程も不要
となる。In the case of quenching with gas, there is no need for a step of cleaning the liquid adhering to the thin plate component as in quenching with liquid. Therefore, a cleaning process of the thin plate component is not required.
【００１０】上記局面において好ましくは、冷却室内の
気体の圧力を調整し、加圧下で薄板部品が冷却される。
これにより、薄板部品に機能、用途に応じた硬さを与え
るとともに熱処理歪みを効果的に防止することができ
る。In the above aspect, preferably, the pressure of the gas in the cooling chamber is adjusted, and the thin plate component is cooled under pressure.
As a result, it is possible to provide the thin plate component with hardness according to its function and application, and to effectively prevent heat treatment distortion.
【００１１】上記局面において好ましくは、焼入れの際
に、冷却室内の気体を攪拌し、その攪拌の速度および時
間が調整される。これにより、薄板部品に機能、用途に
応じた硬さを与えるとともに熱処理歪みを効果的に防止
することができる。In the above aspect, preferably, during quenching, the gas in the cooling chamber is stirred, and the speed and time of the stirring are adjusted. As a result, it is possible to provide the thin plate component with hardness according to its function and application, and to effectively prevent heat treatment distortion.
【００１２】上記局面において好ましくは、薄板部品の
主面に対して気体は略平行に整流で衝てられる。[0012] In the above aspect, preferably, the gas is rectified and impinged substantially parallel to the main surface of the thin plate part.
【００１３】上記局面において好ましくは、薄板部品は
リング形状である。これにより、容易な方法で歪みが少
なく、かつ液体の付着のない精度の高いリング形状の薄
板部品を得ることができる。[0013] In the above aspect, the thin plate component is preferably ring-shaped. This makes it possible to obtain a highly accurate ring-shaped thin plate part with little distortion and no liquid adhesion by an easy method.
【００１４】上記局面において好ましくは、薄板部品は
スラスト軸受軌道輪である。これにより、容易な方法で
歪みが少なく、かつ液体の付着のない精度の高いスラス
ト軸受軌道輪を得ることができる。[0014] In the above aspect, the thin plate component is preferably a thrust bearing race. This makes it possible to obtain a high-precision thrust bearing ring having little distortion and no liquid adhesion by an easy method.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施の形態につい
て図に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１６】図１は、本発明の一実施の形態における薄
板部品の焼入れ方法を説明するためのブロック図であ
る。図１を参照して、まず連続炉を構成する各室が、一
旦真空ポンプと不活性ガスとにより置換される。この
後、浸炭室３に浸炭性のガスを入れ、連続炉の入口より
トレイに載せたワーク（薄板部品）が投入される。この
ワークは、ベスチブル１を通って加熱室２へ移動し、こ
の加熱室２で所望温度に加熱される。この後、浸炭室３
へ移動され、ここでワークに浸炭処理が施される。この
浸炭が完了した後、速やかに加圧冷却室４にトレイが移
動され、同時に加圧冷却室４にたとえば窒素ガスなどの
不活性ガスが入れられて加圧される。この加圧冷却室４
では、プロペラにより不活性ガスを攪拌しながら、トレ
イごとにワークが冷却（焼入れ）される。FIG. 1 is a block diagram for explaining a method of quenching a thin plate part according to an embodiment of the present invention. Referring to FIG. 1, first, each chamber constituting the continuous furnace is temporarily replaced with a vacuum pump and an inert gas. Thereafter, a carburizing gas is introduced into the carburizing chamber 3, and a work (thin plate component) placed on a tray is introduced from the entrance of the continuous furnace. The workpiece moves to the heating chamber 2 through the vestible 1 and is heated to a desired temperature in the heating chamber 2. After this, carburizing room 3
The workpiece is then carburized. After the carburization is completed, the tray is immediately moved to the pressurized cooling chamber 4, and at the same time, an inert gas such as nitrogen gas is put into the pressurized cooling chamber 4 and pressurized. This pressurized cooling chamber 4
Then, the work is cooled (quenched) for each tray while stirring the inert gas with a propeller.
【００１７】次に、ワークがスラスト軸受軌道輪の場合
の加圧冷却による焼入れについて詳細に説明する。Next, quenching by pressurized cooling when the work is a thrust bearing race will be described in detail.
【００１８】図２（ａ）は、スラスト軸受軌道輪の平面
図であり、図２（ｂ）は図２（ａ）のＡ−Ａ線に沿う断
面図を示している。図２（ａ）、（ｂ）を参照して、ワ
ークがたとえばスラスト軸受軌道輪の場合には、ワーク
１０は、軸を挿通するための孔を有するリング状に形成
されている。FIG. 2A is a plan view of the thrust bearing race, and FIG. 2B is a sectional view taken along the line AA in FIG. 2A. 2 (a) and 2 (b), when the work is, for example, a thrust bearing race, the work 10 is formed in a ring shape having a hole for inserting a shaft.
【００１９】そして、このワーク１０は、図３に示すよ
うに一定間隔をおいて治具１５に複数枚吊り下げられた
状態で、図４に示すようにバスケット１６およびトレー
１７にセットされる。この状態で浸炭が終了した後、ロ
ーラハース、クランクなどで移動してきたバスケット１
６およびトレー１７は、図５に示す密閉された冷却室２
０へ投入される。投入と同時に弁２２が開けられて、予
め圧力が調整された不活性ガスが冷却室２０へ封入され
た後、弁２２が閉じられる。この不活性ガスの封入後、
加圧冷却室２０内に設けた攪拌扇（プロペラ）２３が回
転されることにより、図６に示すようにガス流がワーク
１０の主面１０ａに対して略平行に衝て続けられてワー
ク１０が急冷される。The work 10 is set on a basket 16 and a tray 17 as shown in FIG. 4 in a state where a plurality of the works 10 are hung on a jig 15 at regular intervals as shown in FIG. After carburizing is completed in this state, the basket 1 that has been moved by a roller hearth, crank, etc.
6 and the tray 17 are provided in the closed cooling chamber 2 shown in FIG.
It is thrown into 0. The valve 22 is opened at the same time as the charging, and after the inert gas whose pressure has been adjusted in advance is sealed in the cooling chamber 20, the valve 22 is closed. After filling this inert gas,
As the stirring fan (propeller) 23 provided in the pressurized cooling chamber 20 is rotated, the gas flow is continued substantially in parallel with the main surface 10a of the work 10 as shown in FIG. Is quenched.
【００２０】なお、図６に示すようにワーク１０の主面
１０ａに対して平行となるように冷却用気体ガスを衝て
ることで、乱流を生じることなく整流のままで気体ガス
流をワーク１０に衝てることができる。仮に気体ガス流
に乱流が生じた場合、ワーク１０に冷却むらが生じ、反
り歪みが起こりやすくなる。しかし、図６に示すように
整流で気体ガス流をワーク１０に衝てる場合には、冷却
むらが生じにくく、均一にワーク１０を冷却でき、反り
歪みが生じにくくなる。As shown in FIG. 6, by impinging the cooling gas gas so as to be parallel to the main surface 10a of the work 10, the flow of the gas gas is maintained without any turbulence while the flow is rectified. You can hit 10. If turbulence occurs in the gaseous gas flow, uneven cooling of the work 10 occurs, and warpage tends to occur. However, as shown in FIG. 6, when the gas gas flow collides with the work 10 by rectification, uneven cooling is less likely to occur, the work 10 can be cooled uniformly, and warpage is less likely to occur.
【００２１】また、攪拌扇２３の回転数および回転時間
は、外部のインバータおよびタイマーにより制御され、
これによりワーク１０の冷却速度がコントロールされ
る。これにより、たとえばワーク１０のＭｓ点直上温度
までは比較的早く、そしてＭｓ点直上温度以降は比較的
ゆっくりと冷却させることによりワーク１０が歪まない
ようにコントロールすることもできる。The rotation speed and rotation time of the stirring fan 23 are controlled by an external inverter and a timer.
Thereby, the cooling rate of the work 10 is controlled. Thus, for example, the work 10 can be controlled so as not to be distorted by being cooled relatively quickly to the temperature immediately above the Ms point of the work 10 and relatively slowly after the temperature immediately above the Ms point.
【００２２】このようにしてワーク１０が外気温まで冷
却された後、排気弁２１が開けられ加圧冷却室２０内の
不活性ガスが外部へ放出されて焼入れが完了する。After the work 10 is cooled to the outside temperature in this way, the exhaust valve 21 is opened, and the inert gas in the pressurized cooling chamber 20 is released to the outside, thereby completing the quenching.
【００２３】なお上記の実施の形態および実施例では、
不活性ガスとしてたとえば窒素ガスを用いた場合につい
て説明したが、これに限られず他のガスであってもよ
い。In the above embodiments and examples,
Although the case where nitrogen gas is used as the inert gas has been described, the gas is not limited to this, and another gas may be used.
【００２４】また、浸炭直後に焼入れされるワークとし
て、スラスト軸受軌道輪について説明したが、これに限
られず、たとえば厚みが１ｍｍ程度もしくはそれ以下の
薄板部品であれば本発明の焼入れ方法を適用することが
可能である。Also, the thrust bearing race has been described as a work quenched immediately after carburizing, but the present invention is not limited to this, and the quenching method of the present invention is applied to thin plate parts having a thickness of about 1 mm or less. It is possible.
【００２５】本実施の形態の薄板部品の焼入れ方法で
は、不活性ガスなどの気体によってワークが加圧冷却さ
れることにより、液体により焼入れする場合よりも冷却
速度が遅く、またガス圧力やガス種の調整により容易に
薄板部品の冷却速度を制御できる。このため、ワーク
に、機能、用途に応じた硬さを与えるとともに熱処理歪
みの発生を抑制することができる。したがって、歪み取
りの工程が不要となり、ワークの処理工程の削減が可能
となる。In the method of quenching a thin plate part according to the present embodiment, the work is pressurized and cooled by a gas such as an inert gas, so that the cooling rate is slower than in the case of quenching with a liquid. By adjusting the temperature, the cooling rate of the thin plate part can be easily controlled. For this reason, it is possible to provide the work with hardness in accordance with the function and application, and to suppress the occurrence of heat treatment distortion. Therefore, the step of removing the distortion becomes unnecessary, and the number of processing steps of the work can be reduced.
【００２６】また、ガスによる焼入れでは、液体による
焼入れのように薄板部品に付着した液体を洗浄する工程
が不要となり、洗浄工程を削減することもできる。In the case of quenching with a gas, a step of cleaning the liquid adhering to the thin plate component as in the case of quenching with a liquid is not required, and the number of cleaning steps can be reduced.
【００２７】[0027]
【実施例】以下、本発明の実施例について説明する。Embodiments of the present invention will be described below.
【００２８】本願発明者は、連続炉において浸炭直後に
気体を用いて焼入れした場合と液体を用いて焼入れした
場合との双方でワークに生ずる熱処理歪みの程度を調べ
た。その実験の方法および結果について以下に説明す
る。The inventor of the present application examined the degree of heat treatment distortion generated in the workpiece both in the case of quenching using gas and in the case of quenching using liquid immediately after carburizing in a continuous furnace. The method and results of the experiment will be described below.
【００２９】まず、板厚０．７８ｍｍのＳＣＭ４１５材
を準備し、その試料に浸炭直後に塩浴焼入れしたものを
従来例とし、加圧ガスによる焼入れを行なったものを本
発明例とした。本発明例での加圧ガスによる焼入れは、
ガス圧力を５．５ｋｇｆ／ｃｍ2 （絶対圧力）とした窒
素ガスを用いて行なった。そして従来例と本発明例との
各試料（ワーク）の反り量（熱処理歪み量）を測定し
た。First, a SCM415 material having a thickness of 0.78 mm was prepared, and a sample obtained by quenching a salt bath immediately after carburizing was used as a conventional example, and a sample quenched by pressurized gas was used as an example of the present invention. Quenching by pressurized gas in the present invention example,
The test was performed using nitrogen gas at a gas pressure of 5.5 kgf / cm 2 (absolute pressure). Then, the warpage amount (heat treatment distortion amount) of each sample (work) of the conventional example and the present invention example was measured.
【００３０】ここで試料の反り量は、平行平板の間に試
料を挟み、その平板の間に３００ｋｇｆの荷重をかけた
ときの平行平板の間隔Ｈを１／１００ダイヤルゲージで
測定し、その間隔Ｈから試料の板厚を引いた値とした。
このようにして複数の試料について反り量を測定した結
果を表１に示す。The amount of warpage of the sample is determined by measuring the distance H between parallel plates when a sample is sandwiched between parallel plates and a load of 300 kgf is applied between the plates using a 1/100 dial gauge. The value was obtained by subtracting the thickness of the sample from H.
Table 1 shows the results of measuring the amount of warpage for a plurality of samples in this manner.
【００３１】[0031]
【表１】 [Table 1]
【００３２】表１において試料の反り量の右側に示され
た数値は、その反り量となった試料の個数を比で表わし
たものである。The numerical value shown on the right side of the amount of warpage of the sample in Table 1 represents the number of samples having the amount of warpage as a ratio.
【００３３】以上の結果より、浸炭直後に加圧ガスによ
り焼入れを行なった本発明例は、塩浴焼入れを行なった
比較例よりも、ワークに生ずる熱処理歪みを大幅に少な
くできることがわかった。From the above results, it was found that the example of the present invention in which quenching was performed by pressurized gas immediately after carburizing can significantly reduce the heat treatment distortion generated in the work, as compared with the comparative example in which salt bath quenching was performed.
【００３４】また、焼入れに用いるガスの圧力および種
類などを変えることにより、液体の場合よりも容易にワ
ークの硬さおよび熱処理歪みを制御できることも判明し
た。It has also been found that by changing the pressure and type of the gas used for quenching, the hardness of the work and the heat treatment distortion can be controlled more easily than in the case of liquid.
【００３５】また本願発明者は、浸炭直後のガスによる
焼入れにおける加圧冷却室内の圧力と熱処理歪みとの関
係についても調べた。その実験の結果および方法につい
て説明する。The inventor of the present application also examined the relationship between the pressure in the pressurized cooling chamber and the heat treatment distortion during quenching with gas immediately after carburizing. The results and method of the experiment will be described.
【００３６】板厚０．７８ｍｍのＳＣＭ４１５材を準備
し、この試料に冷却用ガスとして窒素ガスを用いて焼入
れを行なった。この際、窒素ガスの圧力を各試料ごとに
変化させ、その各試料ごとの反り量を測定した。この反
り量の測定は、上述した平行平板を用いた反り量の測定
と同様に行なった。その結果を図７に示す。An SCM415 material having a thickness of 0.78 mm was prepared, and this sample was quenched using nitrogen gas as a cooling gas. At this time, the pressure of the nitrogen gas was changed for each sample, and the amount of warpage was measured for each sample. The measurement of the amount of warpage was performed in the same manner as the measurement of the amount of warpage using the parallel plate described above. FIG. 7 shows the result.
【００３７】図７を参照して、上記の実験の結果、窒素
ガスの圧力を高くするほど、反り量が大きくなることが
判明した。また、窒素のガス圧力が２ｋｇｆ／ｃｍ2 未
満の場合には、反り量は小さくなるが、十分な焼入れの
効果が得られないことが判明した。また、窒素のガス圧
力が５ｋｇｆ／ｃｍ2 を超えると、反り量が大きくなり
過ぎ、軸受特性の劣化を招くことが判明した。Referring to FIG. 7, as a result of the above experiment, it was found that the higher the pressure of the nitrogen gas, the larger the amount of warpage. When the nitrogen gas pressure was less than 2 kgf / cm 2 , it was found that the amount of warpage was small, but a sufficient quenching effect could not be obtained. In addition, it was found that when the nitrogen gas pressure exceeded 5 kgf / cm 2 , the amount of warpage became excessively large, which caused deterioration in bearing characteristics.
【００３８】上記の結果より、浸炭直後にガスを用いて
たとえばニードル軸受部品を焼入れする場合には、加圧
冷却室のガス圧は２〜５ｋｇｆ／ｃｍ2 が好ましいこと
が判明した。From the above results, it has been found that when, for example, a needle bearing part is quenched using gas immediately after carburizing, the gas pressure in the pressurized cooling chamber is preferably 2 to 5 kgf / cm 2 .
【００３９】今回開示された実施の形態および実施例は
すべての点で例示であって制限的なものではないと考え
られるべきである。本発明の範囲は上記した説明ではな
くて特許請求の範囲によって示され、特許請求の範囲と
均等の意味および範囲内でのすべての変更が含まれるこ
とが意図される。The embodiments and examples disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
【００４０】[0040]
【発明の効果】本発明の薄板部品の焼入れ方法では、気
体により薄板部品が焼入れされる。気体は液体よりも薄
板部品の冷却速度が遅く、また気体の圧力や種類の調整
により液体よりも容易に薄板部品の冷却速度を制御でき
るため、薄板部品に機能、用途に応じた硬さを与えると
ともに熱処理歪みの発生を抑制することができる。この
ため、歪み取りが不要となり、薄板部品の処理工程の削
減が可能となる。According to the method for quenching thin parts of the present invention, the thin parts are quenched by gas. Gas has a slower cooling rate for thin parts than liquid, and can control the cooling rate for thin parts more easily than liquid by adjusting the pressure and type of gas, so that thin parts can be given hardness according to function and application. At the same time, the occurrence of heat treatment distortion can be suppressed. For this reason, it is not necessary to remove the distortion, and it is possible to reduce the number of processing steps for the thin plate component.
【００４１】また、気体による焼入れは、液体による焼
入れのように薄板部品に付着した液体を洗浄する工程は
不要であり、薄板部品の洗浄工程を削減することもでき
る。Further, the quenching by gas does not require the step of cleaning the liquid adhering to the thin plate component as the quenching by the liquid, and can reduce the cleaning process of the thin plate component.
【図１】本発明の一実施の形態における連続炉における
薄板部品の処理工程を示すブロック図である。FIG. 1 is a block diagram showing a process of processing a thin plate component in a continuous furnace according to an embodiment of the present invention.
【図２】薄板部品の一例としてスラスト軸受軌道輪の構
成を示す平面図（ａ）、断面図（ｂ）である。FIG. 2 is a plan view (a) and a cross-sectional view (b) showing the configuration of a thrust bearing race as an example of a thin plate part.
【図３】連続炉において各処理が施されるワークの状態
を示す概略斜視図である。FIG. 3 is a schematic perspective view showing a state of a work to be subjected to each processing in a continuous furnace.
【図４】連続炉において各処理が施されるワークの状態
をバスケットおよびトレイと合わせて示す概略斜視図で
ある。FIG. 4 is a schematic perspective view showing a state of a work to be subjected to each processing in a continuous furnace together with a basket and a tray.
【図５】冷却室内でワークが冷却される様子を説明する
ための概略断面図である。FIG. 5 is a schematic cross-sectional view for explaining how a work is cooled in a cooling chamber.
【図６】ワークに気体ガス流を当てる様子を説明するた
めの図である。FIG. 6 is a diagram for explaining how a gaseous gas flow is applied to a work.
【図７】窒素ガスを用いて焼入れを行なった場合の窒素
ガス圧力とワークの反り量との関係を示すグラフであ
る。FIG. 7 is a graph showing the relationship between the nitrogen gas pressure and the amount of warpage of a workpiece when quenching is performed using nitrogen gas.
１０ ワーク １５ 治具 10 Work 15 Jig
フロントページの続き (72)発明者 橋本 幸夫 愛知県豊田市柿本町６丁目９番地11 新和 実業株式会社内Continuation of front page (72) Inventor Yukio Hashimoto 6-9-11 Kakimotocho, Toyota City, Aichi Prefecture Inside Shinwa Business Co., Ltd.
Claims (6)
とを連続的に移動可能な連続炉において、前記浸炭室に
て浸炭された後、速やかに前記冷却室にて焼入れされる
薄板部品の焼入れ方法であって、 前記焼入れは、気体により前記薄板部品を冷却すること
により行なわれる、薄板部品の焼入れ方法。In a continuous furnace capable of continuously moving at least a carburizing chamber and a cooling chamber, the sheet component is carburized in the carburizing chamber and then quickly quenched in the cooling chamber. A quenching method, wherein the quenching is performed by cooling the thin plate component with a gas.
し、加圧下で前記薄板部品を冷却する、請求項１に記載
の薄板部品の焼入れ方法。2. The method of quenching a thin plate component according to claim 1, wherein the pressure of the gas in the cooling chamber is adjusted, and the thin plate component is cooled under pressure.
気体を攪拌し、その攪拌の速度および時間を調節する、
請求項１に記載の薄板部品の焼入れ方法。3. During the quenching, the gas in the cooling chamber is stirred, and the speed and time of the stirring are adjusted.
The method for quenching a thin plate component according to claim 1.
略平行に整流で衝てられる、請求項１に記載の薄板部品
の焼入れ方法。4. The method of quenching a thin plate component according to claim 1, wherein the gas is impinged on the main surface of the thin plate component by rectification substantially in parallel.
項１に記載の薄板部品の焼入れ方法。5. The method for quenching a thin plate component according to claim 1, wherein the thin plate component has a ring shape.
る、請求項１に記載の薄板部品の焼入れ方法。6. The method for quenching a thin plate component according to claim 1, wherein the thin plate component is a thrust bearing race.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18140297A JP3926431B2 (en) | 1997-07-07 | 1997-07-07 | Hardening method for thin plate parts |
| DE19829825A DE19829825C2 (en) | 1997-07-07 | 1998-07-03 | Carburizing and quenching device and method for quenching thin plate parts |
| US09/110,328 US6149860A (en) | 1997-07-07 | 1998-07-06 | Carburization and quenching apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18140297A JP3926431B2 (en) | 1997-07-07 | 1997-07-07 | Hardening method for thin plate parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1121631A true JPH1121631A (en) | 1999-01-26 |
| JP3926431B2 JP3926431B2 (en) | 2007-06-06 |
Family
ID=16100135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18140297A Expired - Lifetime JP3926431B2 (en) | 1997-07-07 | 1997-07-07 | Hardening method for thin plate parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3926431B2 (en) |
Cited By (9)
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|---|---|---|---|---|
| JP2005330511A (en) * | 2004-05-18 | 2005-12-02 | Nisshin Steel Co Ltd | Method for manufacturing high-carbon steel parts with small strain of heat treatment |
| JP2006200028A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Method for manufacturing bearing washer of thrust bearing, and manufacturing method for thrust bearing |
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|---|---|---|---|---|
| JP2005330511A (en) * | 2004-05-18 | 2005-12-02 | Nisshin Steel Co Ltd | Method for manufacturing high-carbon steel parts with small strain of heat treatment |
| JP4546843B2 (en) * | 2005-01-21 | 2010-09-22 | Ｎｔｎ株式会社 | Thrust bearing washer manufacturing method and thrust bearing manufacturing method |
| JP2006200019A (en) * | 2005-01-21 | 2006-08-03 | Ntn Corp | Method for manufacturing bearing washer of thrust bearing and method for manufacturing thrust bearing |
| JP2006200028A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Method for manufacturing bearing washer of thrust bearing, and manufacturing method for thrust bearing |
| JP4546844B2 (en) * | 2005-01-24 | 2010-09-22 | Ｎｔｎ株式会社 | Thrust bearing washer manufacturing method and thrust bearing manufacturing method |
| JP2007297664A (en) * | 2006-04-28 | 2007-11-15 | Aisin Aw Co Ltd | Reduced pressure slow-cooling apparatus and heat treatment apparatus for steel member |
| JP4724596B2 (en) * | 2006-04-28 | 2011-07-13 | アイシン・エィ・ダブリュ株式会社 | Vacuum slow cooling device and steel member heat treatment device |
| JP2009287085A (en) * | 2008-05-29 | 2009-12-10 | Ihi Corp | Apparatus and method for heat-treatment |
| CN103074478A (en) * | 2013-01-16 | 2013-05-01 | 江西樟树市福铃内燃机配件有限公司 | 'Two-time temperature control and one-time time control quenching' heat treatment process for cast alloy valve seat rings |
| JP2017535671A (en) * | 2014-11-14 | 2017-11-30 | プジョー シトロエン オートモビル エス アー | Method and equipment for carbonitriding one or more steel parts at low pressure and high temperature |
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| JP2019014945A (en) * | 2017-07-07 | 2019-01-31 | 日産自動車株式会社 | Quenching method of steel part and quenching apparatus |
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| JP2019039053A (en) * | 2017-08-28 | 2019-03-14 | Ntn株式会社 | Heat treatment system and heat treatment method |
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