JPH09177504A - Manufacture of seal ring of turbo charger and heat treatment for seal ring manufacture - Google Patents

Manufacture of seal ring of turbo charger and heat treatment for seal ring manufacture

Info

Publication number
JPH09177504A
JPH09177504A JP7335038A JP33503895A JPH09177504A JP H09177504 A JPH09177504 A JP H09177504A JP 7335038 A JP7335038 A JP 7335038A JP 33503895 A JP33503895 A JP 33503895A JP H09177504 A JPH09177504 A JP H09177504A
Authority
JP
Japan
Prior art keywords
curling
seal ring
ring
shape
heat treatment
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
Application number
JP7335038A
Other languages
Japanese (ja)
Other versions
JP3891364B2 (en
Inventor
Yoshiki Masukata
芳樹 舛形
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.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP33503895A priority Critical patent/JP3891364B2/en
Publication of JPH09177504A publication Critical patent/JPH09177504A/en
Application granted granted Critical
Publication of JP3891364B2 publication Critical patent/JP3891364B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Landscapes

  • Turbine Rotor Nozzle Sealing (AREA)
  • Sealing Devices (AREA)
  • Supercharger (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent the fluctuation of a curling shape and the difficulty of its correction and to eliminate the necessity of an intermediate grinding step by causing a plastic deformation level to show a particular index in step of performing specified curling and during curling molding. SOLUTION: A helical curling step is performed for an oblong linear material which is calcined beforehand and subjected to uncalcining heat treatment and after the curling step, the material is cut so as to have a crony. Then, the material is formed in a C ring shape so as to have 2 do/(do-di) set to less than 20. In the expression, do and di represent the outer and inner diameters of the ring respectively. 2 do/(do-di) is an index for indicating a plastic deformation level during the curling molding step and as this value is smaller, plastic deformation is greater. Little fluctuation occurs in the surging shape or in dimension and thus the control of the shape and dimension of the molded ring is facilitated. Thus, a seal ring as a sealing member between a turbo charger shaft and a housing is manufactured with high dimension accuracy and surface cleaning.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、自動車エンジン用
等のターボチャージャの回転軸とハウジングとの間に介
在されて気密作用をなすシールリングの製造方法および
これに用いる線材の技術分野に属するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a seal ring which is interposed between a rotary shaft of a turbocharger for an automobile engine or the like and a housing and has an airtight effect, and a wire rod used for the method. Is.

【0002】[0002]

【従来の技術】自動車エンジン用等のターボチャージャ
の回転軸とハウジング間の気密保持は、回転軸に取り付
けたシールプレートと、該回転軸を貫通させたハウジン
グに設けられて、上記シールプレートに圧接または対峙
させたシールリングとによって得る等、シールリングを
介在させることで得られている。ターボチャージャは、
排気熱の影響による高温下で、しかも数万〜数十万rp
mという超高速回転で動作するため、摺動部材となるシ
ールリングには従来より耐熱性、耐摩耗性等に優れる高
速度工具鋼が主に使用されてきた。
BACKGROUND ART Airtightness between a rotary shaft and a housing of a turbocharger for an automobile engine or the like is provided in a seal plate attached to the rotary shaft and a housing penetrating the rotary shaft and press-contacted to the seal plate. Alternatively, it is obtained by interposing a seal ring, such as obtained by facing a seal ring. The turbocharger is
At high temperature due to exhaust heat, tens of thousands to hundreds of thousands of rp
Since it operates at an ultra-high speed of m, high-speed tool steel, which is superior in heat resistance and wear resistance, has been mainly used for the seal ring as a sliding member.

【0003】従来のシールリングの製造方法は、金属
粉末を高温下でリング状に焼き固める焼結法およびシ
ールリングの断面形状に近い形状の冷間仕上げ、もしく
は焼なまし異形線材を、オーステナイト化温度以上に加
熱しながら、螺旋状にカーリング加工するとともに、冷
却することで、成形加工と同時に焼入れも行なう、いわ
ゆるカーリング焼入れ法の二方法が主であった。熱処理
としては焼結法の場合は焼入れ、焼戻し処理、カーリン
グ焼入れ法の場合は、成形時に焼入れが終了しているの
で焼戻し処理のみが行なわれる。カーリング焼入れ法に
よるものは、通常この焼戻し処理後切断され、合口を有
するC字形リングとされる。続いて、両方法とも通常、
機械的もしくは化学的な方法で、前記熱処理に伴うスケ
ール層等を除去し、要すれば中間研磨により表面粗さ、
寸法、形状等を整えた後、必要に応じて窒化、溶射、メ
ッキ等の表面処理を施し、最後に仕上研磨で寸法、表面
精度を整えて完成品とされている。
A conventional method for producing a seal ring is a sintering method in which metal powder is fired and solidified in a ring shape at high temperature, and a cold finish in a shape close to the cross-sectional shape of the seal ring, or an annealed deformed wire rod is austenitized. The two main methods were the so-called curling and quenching method, in which, while heating above the temperature, curling was performed in a spiral shape, and cooling was performed to quench simultaneously with the forming. As the heat treatment, in the case of the sintering method, quenching and tempering treatments are performed. In the case of the curling quenching method, since the quenching is completed at the time of molding, only the tempering treatment is performed. The curling quenching method is usually cut after this tempering treatment to obtain a C-shaped ring having an abutment. Then both methods are usually
A mechanical or chemical method is used to remove the scale layer, etc. accompanying the heat treatment, and if necessary, surface roughness by intermediate polishing,
After adjusting the size, shape, etc., if necessary, surface treatment such as nitriding, thermal spraying, plating, etc. is performed, and finally the size and surface accuracy are adjusted by finish polishing to obtain a finished product.

【0004】[0004]

【発明が解決しようとする課題】前記製法のうち、焼結
法は金属粉末を製造する工程、焼結する工程が前提とな
り、しかも小さい形状のシールリングを一個一個作らな
ければならないので高コスト化するという問題点を有す
る。一方、カーリング焼入れ法は、高温のカーリング加
工に際して、ジグ、工具の損傷が激しいため、また温度
の変動によっても、カーリング形状、寸法の変動が大き
くなり易く、かつ、これらの変動は、常温に冷却後に測
定されるため、制御、修正が遅れやすいこと、製品への
酸化スケールの生成が多く、前述の中間研磨が必要とな
ること、またはこのスケール生成を防止するためには、
カーリングを閉密室内の保護雰囲気中で行なう必要があ
り、この場合、カーリング形状、寸法の測定およびその
修正が困難化すること、等の欠点がある。なお、上記の
酸化スケールの生成による中間研磨は、製品の内径、外
径、両端面の4面とも一般に必要であり、カーリング焼
入れ法では内径面の研磨には特に多大の工数を要するも
のである。さらに、カーリング焼入れ法で使用される熱
間カーリング装置は、その前後に大容量の加熱装置と冷
却設備が必要となり、大がかりな装置となっている。
Among the above-mentioned manufacturing methods, the sintering method is premised on the steps of manufacturing and sintering metal powder, and the cost is high because each small-sized seal ring has to be made individually. There is a problem of doing. On the other hand, in the curling quenching method, jigs and tools are severely damaged during high-temperature curling, and the curling shape and dimensions are likely to change greatly due to temperature changes, and these changes are cooled to room temperature. Since it is measured later, control, correction is likely to be delayed, the production of oxide scale on the product is large, the intermediate polishing described above is necessary, or in order to prevent this scale production,
It is necessary to carry out curling in a protective atmosphere in a closed chamber, and in this case, there are drawbacks such that it becomes difficult to measure the curling shape and dimensions and correct the curling. In addition, the intermediate polishing by the generation of the above-mentioned oxide scale is generally necessary for the inner diameter, the outer diameter, and the four end surfaces of the product, and particularly a great number of man-hours are required to polish the inner diameter surface in the curling quenching method. . Further, the hot curling device used in the curling quenching method requires a large-capacity heating device and cooling equipment before and after the hot curling device, which is a large-scale device.

【0005】本発明は、カーリング焼入れ法におけるカ
ーリング形状の変動やその修正の困難性を回避するとと
もに、中間研磨工程を不要にするシールリングの製造方
法、およびそれに用いる線材を提供することを課題とす
る。
It is an object of the present invention to provide a method for manufacturing a seal ring that avoids the fluctuation of the curling shape and the difficulty of correcting the curling shape in the curling quenching method, and eliminates the need for an intermediate polishing step, and a wire used therefor. To do.

【0006】[0006]

【課題を解決するための手段】本発明者はカーリング焼
入れ法の得失を踏まえつつ、シールリングの製造方法に
ついて、焼鈍線材をカーリング成形した後焼入れ焼戻し
熱処理する方法等、種々の方法について試作テスト、コ
スト試算を含む基礎的検討を行なった。その結果、本発
明者は後述の実施例のように、予め適正な条件で焼入れ
焼戻し熱処理された線材は、高硬度に熱処理されている
にもかかわらず、エッジワイズ(線材の幅方向がリング
の半径方向となる方向)であり、かつ2do/(do-di)の値が
例えば10程度等、過酷なカーリング条件に対しても十分
耐えることをテストの結果見出した。
Means for Solving the Problems The present inventor, taking into consideration the advantages and disadvantages of the curling quenching method, about the manufacturing method of the seal ring, the method of performing the quenching and tempering heat treatment after the curling of the annealed wire rod, etc. A basic study including cost estimation was conducted. As a result, the present inventor, as in the examples described later, the wire rod that has been subjected to quenching and tempering heat treatment in advance under appropriate conditions, despite being heat-treated to a high hardness, edgewise (width direction of the wire rod As a result of the test, it was found that it can withstand severe curling conditions such as a radial direction) and a value of 2do / (do-di) of about 10, for example.

【0007】すなわち、本発明に用いる熱処理線材は、
例えば500HV以上の熱処理硬さを有するにもかかわ
らず、カーリングにおいてその外径部に、例えば約1
1.1%(例:幅1mmの線材をエッジワイズに外径1
0mmとなるように曲げ成形とするときの伸び)と大き
い伸び変形を伴うような苛酷な変形条件に対しても十分
耐えてカーリングが可能であることがわかった。因み
に、このテストに用いた線材の引張試験における伸び値
(標点距離:100mm)は2.6〜3.6%の低い値
であった。本発明は上記のように、高硬度に熱処理され
た線材が過酷なカーリング条件にも十分耐え得ることを
知見したことに基づくものである。
That is, the heat-treated wire used in the present invention is
Despite having a heat treatment hardness of, for example, 500 HV or more, the outer diameter portion of the curling has, for example, about 1
1.1% (Example: 1 mm wide wire is edgewise and outer diameter is 1
It has been found that curling is possible while sufficiently enduring severe deformation conditions such as elongation when bending and forming to 0 mm) and large elongation deformation. Incidentally, the elongation value (gage length: 100 mm) in the tensile test of the wire used in this test was a low value of 2.6 to 3.6%. The present invention is based on the finding that, as described above, the wire material that has been subjected to heat treatment with high hardness can sufficiently withstand severe curling conditions.

【0008】そこで、本願の第1発明は、ターボチャー
ジャの回転軸とハウジングとの間の気密用部材であるシ
ールリングの製造方法において、予め焼入れ、焼戻し熱
処理を施された長尺の線材を螺旋状にカーリング加工す
る工程、および該カーリング加工した後切断して合口を
有し、2do/(do-di)(ここでdo,diはリングの外径,内径)
が20未満のC字形リング状とすることを特徴とする工程
を包含するターボチャージャのシールリングの製造方法
である。また、第2発明はターボチャージャのシールリ
ング製造用の調子役の線材であって、高速度工具鋼組成
を有し、かつ、焼入れ、焼戻し熱処理を施され、硬さを
500HV以上とされたことを特徴とするターボチャー
ジャのシールリング製造用熱処理線材である。
Therefore, the first invention of the present application is a method for manufacturing a seal ring, which is an airtight member between a rotary shaft of a turbocharger and a housing, in which a long wire which is preliminarily quenched and tempered is spirally wound. Curling process into a circular shape, and after the curling process is cut to have a joint, 2do / (do-di) (where do and di are the outer and inner diameters of the ring)
Is a C-shaped ring having a value of less than 20. A method for manufacturing a seal ring for a turbocharger, which includes the step of: The second invention is a wire rod for producing a seal ring of a turbocharger, which has a high speed tool steel composition, is hardened and tempered, and has a hardness of 500 HV or more. Is a heat-treated wire rod for producing a seal ring of a turbocharger.

【0009】2do/(do-di)は、カーリング成形時の塑性
変形度合を示す指標となるもので、この値が小さい程、
塑性変形が多く、本発明のごとく高硬度に、したがって
引張り試験における伸び率が小さくなるごとく熱処理さ
れた材料では、折損が生じてカーリングが不可能とな
る。第1発明はその発明の特色を示す領域としてこの値
が20未満の領域とした。20以上の領域は相対的に折損の
可能性が低い。
2do / (do-di) is an index showing the degree of plastic deformation during curling, and the smaller this value, the more
A material that has been subjected to a large amount of plastic deformation and has a high hardness as in the present invention, and thus has a low elongation in a tensile test, will be broken and curling will be impossible. In the first invention, the area having this value is less than 20 as the area showing the feature of the invention. Areas over 20 are relatively unlikely to break.

【0010】本願の第1発明において、カーリングは通
常常温下で行なうが、特に高合金鋼、高硬度の線材、特
に寸法的に(高い伸びを伴う等)過酷である等の厳しい
カーリング条件においては線材の折損抑制の点から焼戻
し処理温度以下の温間カーリングとしてもよい。250
℃程度以下のカーリングでは、特にテンパーカラーが着
く程度で酸化やそれによる肌荒れも小さく、またカーリ
ング用のジグ、工具等の損傷、作業中の温度変動も少な
く、このため、これらによるカーリング形状や寸法の変
動は少なく、成形リングの形状、寸法の管理も容易であ
り、また加熱、冷却装置も小規模でよい等の利点があ
る。なお、このテンパーカラーは、軽度の酸洗等で容易
に除去可能である。
In the first invention of the present application, the curling is usually carried out at room temperature, but especially under high curling conditions such as high alloy steel, high hardness wire rod, and particularly dimensionally severe conditions (such as high elongation). From the viewpoint of suppressing breakage of the wire rod, warm curling at a tempering temperature or lower may be used. 250
Curling at temperatures below about ℃ will reduce oxidation and rough skin due to the color of the tempering, and less damage to curling jigs, tools, etc., and temperature fluctuations during work. Is small, the shape and size of the molding ring can be easily controlled, and the heating and cooling devices can be small in scale. The temper color can be easily removed by light pickling or the like.

【0011】また、本発明の製造方法におけるカーリン
グ後の切断方法として、切断砥石等による通常の切断方
法の他、レーザ、電子ビーム、プラズマ等の高熱エネル
ギ密度の加熱法による切断法を採用すると、その切断代
を0.1mmまたはそれ以下の0.01mm等とするこ
とが可能である。またカーリング成形体を、その内径に
拡径可能なマンドレルを挿入する方法等で弾性変形によ
り拡径した状態で切断し、切断後、その弾性により縮径
させることも可能である。これらの方法は、合口間隔が
小さいシールリングの製造方法として適当であり、特に
これらの両者を組み合わせることにより、合口が互いに
圧力をもって接触したシールリングとすることも可能で
ある。
Further, as the cutting method after curling in the manufacturing method of the present invention, if a cutting method by a heating method having a high thermal energy density of laser, electron beam, plasma or the like is adopted in addition to a normal cutting method by a cutting grindstone or the like, The cutting margin can be set to 0.1 mm or less, such as 0.01 mm. It is also possible to cut the curling molded body in a state in which the curling molded body is expanded by elastic deformation by a method of inserting a mandrel capable of expanding the inner diameter thereof, and after cutting, reduce the diameter by the elasticity thereof. These methods are suitable as a method for producing a seal ring having a small gap between the abutments, and particularly by combining both of them, it is possible to obtain a seal ring in which the abutments are in contact with each other with pressure.

【0012】なお、本発明のシールリングの製造方法に
おいて、カーリング加工後または切断後、1〜数時間程
度等十分な保持時間の焼戻し熱処理を施してもよく、こ
の場合、連続熱処理法による短時間の焼戻しを補って耐
摩耗性の向上等の効果がある。なお、本願の方法発明に
適する材料として、耐熱性、耐摩耗性の点から高速度工
具鋼が適するが、作動温度で適当な耐熱性と耐摩耗性を
有するものであれば、SKD11等の冷間ダイス鋼等高
速度工具鋼に限定されない。これら耐熱性や耐摩耗性等
の特性は、一般に高合金化することにより向上される
が、この高合金化により逆にカーリング性は低下するの
で、この場合は、溶製法によるものに比し粉末法による
材料はカーリング性が高く適している。
In the method for producing a seal ring of the present invention, tempering heat treatment for a sufficient holding time such as about 1 to several hours after curling or cutting may be applied. It has the effect of compensating for the tempering and improving the wear resistance. As a material suitable for the method invention of the present application, high-speed tool steel is suitable from the viewpoint of heat resistance and wear resistance, but as long as it has suitable heat resistance and wear resistance at the operating temperature, it can be cooled with SKD11 or the like. It is not limited to high speed tool steel such as cold die steel. Properties such as heat resistance and wear resistance are generally improved by making a high alloy, but the curling property is decreased due to this high alloying. Therefore, in this case, the powder is more powdery than that produced by the melting method. The material obtained by the method has high curling property and is suitable.

【0013】次に、本願の第2発明の材料は、高速度工
具鋼組成を有し、かつ焼入れ焼戻し熱処理硬さが500
HV以上の長尺の線材である。高速度工具鋼組成とする
理由は、前記のように高速度工具鋼が耐熱性、耐摩耗性
に優れ望ましいからである。また、現行のカーリング焼
入れ法によるものは、硬さが500HV程度である。し
たがって、本発明の材料は少なくとも現行品程度以上の
耐摩耗性等の性能を得るものとして硬さを500HV以
上とした。望ましい硬さ範囲は、SKH51級を冷間カ
ーリング法とする場合、HV700程度まで可能であ
る。
Next, the material of the second invention of the present application has a high speed tool steel composition and a quenching and tempering heat treatment hardness of 500.
It is a long wire of HV or more. The reason why the high speed tool steel composition is adopted is that the high speed tool steel is desirable because of its excellent heat resistance and wear resistance as described above. Further, the hardness of the current curling quenching method is about 500 HV. Therefore, the material of the present invention has a hardness of 500 HV or more in order to obtain at least performances such as abrasion resistance of current products. A desirable hardness range is up to about HV700 when SKH51 grade is a cold curling method.

【0014】この発明にかかるシールリングの製造方法
において、使用する素材は線材を引抜加工や圧延加工で
平角線状に仕上げ、長い線材のまま連続焼入れ焼戻し熱
処理法したものがよい。すなわち、該線材はその長手方
向の硬さ等の特性のバラツキは極めて少なく、かつ、そ
の表面は高度に清浄なものとなし得るから、カーリング
加工を冷間または低温度の温間で行なうことによる軽度
の酸化やジグ等の損傷低下とあいまって、カーリング加
工精度は容易に素材コイルの全長さに亘って高精度に安
定し、また寸法的に厳しいカーリング条件に耐えること
ができるとともに、従来のカーリング焼入れ法で必要で
あった表面の酸化スケール除去や寸法ムラを吸収するた
めの中間研磨作業が省略でき、かつ自動加工化容易とな
るからである。
In the method for manufacturing the seal ring according to the present invention, the material used is preferably one in which the wire is finished into a rectangular wire by drawing or rolling, and the long wire is continuously quenched and tempered. That is, since the wire has very little variation in properties such as hardness in the longitudinal direction and the surface can be made highly clean, curling may be performed cold or at low temperature. In combination with slight oxidation and reduced damage such as jigs, curling accuracy can be easily stabilized with high precision over the entire length of the material coil, and it can withstand dimensionally severe curling conditions. This is because it is possible to omit the intermediate polishing work for removing the oxide scale on the surface and absorbing the dimensional unevenness, which are required in the quenching method, and to facilitate automatic processing.

【0015】[0015]

【発明の実施の形態】表1に示すJIS 高速度工具鋼
SKH51の線材を引抜き、焼鈍を繰り返しながらサイ
ズダウンした後、圧延加工によって0.60mm厚×
1.0mm幅の平角の長尺の線材に仕上げ、表2に示す
各種熱処理条件にて焼入れ焼戻し処理を行なって供試材
とした。熱処理は、焼入れ、焼戻しとも連続熱処理炉を
用いて行ない、炉内は酸化スケールの発生を防ぐため
に、それぞれ水素ガス、窒素ガス雰囲気とした。これら
の熱処理線材をカーリング装置によって、外径 10m
mのリングに冷間成形し、そのカーリング加工性とカー
リング加工後の表面状態、および線材の表面硬さを測定
評価した。このカーリング条件ではリングの外径となっ
た部分は約11.1%の伸び変形したこととなる。
BEST MODE FOR CARRYING OUT THE INVENTION JIS high speed tool steel shown in Table 1
The SKH51 wire rod is drawn out, the size is reduced by repeating annealing, and then it is rolled by 0.60 mm thickness ×
A flat long wire having a width of 1.0 mm was finished, and was quenched and tempered under various heat treatment conditions shown in Table 2 to obtain a test material. The heat treatment was performed using a continuous heat treatment furnace for both quenching and tempering, and the inside of the furnace was filled with hydrogen gas and nitrogen gas atmospheres in order to prevent the generation of oxide scale. These heat treated wire rods were curled up to an outside diameter of 10 m.
It was cold-formed into a ring of m, and its curling workability, the surface state after curling, and the surface hardness of the wire rod were measured and evaluated. Under this curling condition, the portion having the outer diameter of the ring is stretch-deformed by about 11.1%.

【0016】表2にこれらの状況を示す。表2において
焼入れ温度 1050℃、焼戻し温度 600〜670℃
で熱処理を施したNo.1〜4の線材は、523〜652
HVの硬さにもかかわらず折損がなく、かつ現行のカー
リング焼入れ法によるものに比し、高い形状、寸法精度
を安定して得ることができ、表面肌も酸化スケールの生
成は勿論なく、中間研磨の必要性はなくシールリングと
して適当であると判断された。
Table 2 shows these situations. In Table 2, quenching temperature 1050 ° C, tempering temperature 600 to 670 ° C
The wire rods No. 1 to 4 heat-treated at 523 to 652
Despite the hardness of HV, there is no breakage, and higher shape and dimensional accuracy can be stably obtained compared with the current curling and quenching method. Of course, the surface skin does not generate oxide scale, It was judged to be suitable as a seal ring without the need for polishing.

【0017】[0017]

【表1】 [Table 1]

【0018】[0018]

【表2】 [Table 2]

【0019】一方、焼入れ温度を950℃に低下するこ
とで、焼入れままの硬さを上記No.3ないし4とほぼ
同程度とした比較材では、カーリング加工時に折損が発
生し、成形不可能であった(No.5,6)。これは焼
入れままの組織は、焼入れ時の残留歪を多く含んでいる
ために、同一硬度の焼入れ、焼戻し線材に比べて靭性が
低いためである。また、950℃で焼入れした線材を上
記No.1〜4とほぼ同じ温度範囲で焼戻し処理を施し
た線材は、製品硬さが現行のカーリング焼入れ法のHV
500程度を下回ることが判明した(No.7,8)。
さらに、焼入れ温度を1150℃とし、上記No.1〜
4とほぼ同程度の温度で焼戻し温度のものは硬さがHV
670以上となり、冷間でのカーリング加工で折損を生
じた。しかし、焼戻し温度を上昇して、650HV程度
以下とすることで冷間カーリング可能であった。これら
に対し、カーリング焼入れ法によるものは寸法精度保持
が困難で外径のバラツキが多く、かつ表面に厚いスケー
ルを生じ、中間研磨工程が必要であった。
On the other hand, by lowering the quenching temperature to 950 ° C., the hardness of the as-quenched steel can be reduced to that of In the comparative material having the same degree as that of Nos. 3 to 4, breakage occurred during the curling process, and molding was impossible (Nos. 5 and 6). This is because the as-quenched structure contains a large amount of residual strain at the time of quenching, and therefore has a lower toughness than a quenched and tempered wire rod having the same hardness. Further, the wire rod quenched at 950 ° C. was processed into the above No. Wires that have been tempered in the same temperature range as 1 to 4 have a product hardness of HV of the current curling quenching method.
It was found to be below 500 (No. 7, 8).
Further, the quenching temperature was set to 1150 ° C., and the No. 1 to
Hardness is about HV in the tempering temperature of about 4
It became 670 or more, and breakage occurred in the cold curling process. However, cold curling was possible by increasing the tempering temperature to about 650 HV or less. On the other hand, with the curling quenching method, it was difficult to maintain the dimensional accuracy, there were many variations in the outer diameter, and a thick scale was produced on the surface, and an intermediate polishing step was required.

【0020】[0020]

【発明の効果】本発明の製造方法によると、従来の大気
中でのカーリング焼入れ法で不可避であった表面スケー
ルの生成に伴う中間研磨工程が不要となり、しかもカー
リング形状や巻径が高精度に安定するため、品質、製品
の歩留、生産性が向上するという効果が得られる。ま
た、カーリングに使用する装置も加熱、冷却装置等を簡
素化または省略可能となった。
According to the manufacturing method of the present invention, the intermediate polishing step associated with the generation of the surface scale, which was inevitable in the conventional curling and quenching method in the atmosphere, becomes unnecessary, and moreover, the curling shape and the winding diameter can be accurately adjusted. Since it is stable, the effect of improving quality, product yield, and productivity can be obtained. Moreover, the heating and cooling devices used for curling can be simplified or omitted.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ターボチャージャの回転軸とハウジング
との間の気密用部材であるシールリングの製造方法にお
いて、予め焼入れ、焼戻し熱処理を施された長尺の線材
を螺旋状にカーリング加工する工程、および該カーリン
グ加工した後切断して合口を有し、2do/(do-di)(ここで
do,diはリングの外径,内径)が20未満のC字形リング状
とすることを特徴とする工程を包含するターボチャージ
ャのシールリングの製造方法。
1. A method for manufacturing a seal ring, which is an airtight member between a rotary shaft of a turbocharger and a housing, in which a long wire which has been previously quenched and tempered is curled into a spiral shape, And after the curling process, it is cut and has an abutment, and 2do / (do-di) (here
do and di are C-shaped ring-shaped with the outer diameter and inner diameter of the ring being less than 20. A method of manufacturing a seal ring for a turbocharger, which includes a process.
【請求項2】 ターボチャージャのシールリング製造用
の長尺の線材であって、高速度工具鋼組成を有し、か
つ、焼入れ、焼戻し熱処理を施され、硬さを500HV
以上とされたことを特徴とするターボチャージャのシー
ルリング製造用熱処理線材。
2. A long wire rod for producing a seal ring for a turbocharger, which has a high speed tool steel composition, and is subjected to quenching and tempering heat treatment and has a hardness of 500 HV.
A heat treated wire rod for producing a seal ring for a turbocharger, which is characterized as described above.
JP33503895A 1995-12-22 1995-12-22 Method of manufacturing a turbocharger seal ring Expired - Fee Related JP3891364B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33503895A JP3891364B2 (en) 1995-12-22 1995-12-22 Method of manufacturing a turbocharger seal ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33503895A JP3891364B2 (en) 1995-12-22 1995-12-22 Method of manufacturing a turbocharger seal ring

Publications (2)

Publication Number Publication Date
JPH09177504A true JPH09177504A (en) 1997-07-08
JP3891364B2 JP3891364B2 (en) 2007-03-14

Family

ID=18284053

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33503895A Expired - Fee Related JP3891364B2 (en) 1995-12-22 1995-12-22 Method of manufacturing a turbocharger seal ring

Country Status (1)

Country Link
JP (1) JP3891364B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012042005A (en) * 2010-08-20 2012-03-01 Denso Corp Seal ring and method of manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012042005A (en) * 2010-08-20 2012-03-01 Denso Corp Seal ring and method of manufacturing the same

Also Published As

Publication number Publication date
JP3891364B2 (en) 2007-03-14

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