JPH02213422A - Production of high strength spring - Google Patents

Production of high strength spring

Info

Publication number
JPH02213422A
JPH02213422A JP3442689A JP3442689A JPH02213422A JP H02213422 A JPH02213422 A JP H02213422A JP 3442689 A JP3442689 A JP 3442689A JP 3442689 A JP3442689 A JP 3442689A JP H02213422 A JPH02213422 A JP H02213422A
Authority
JP
Japan
Prior art keywords
austenite
temp
stock
spring
plastic working
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
JP3442689A
Other languages
Japanese (ja)
Other versions
JP2774808B2 (en
Inventor
Tomohiko Ayada
倫彦 綾田
Masatoshi Shimizu
正利 清水
Toyoyuki Tono
東野 豊之
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.)
NHK Spring Co Ltd
Original Assignee
NHK Spring Co 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 NHK Spring Co Ltd filed Critical NHK Spring Co Ltd
Priority to JP1034426A priority Critical patent/JP2774808B2/en
Publication of JPH02213422A publication Critical patent/JPH02213422A/en
Application granted granted Critical
Publication of JP2774808B2 publication Critical patent/JP2774808B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Wire Processing (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE:To produce a spring having high hardness and high strength and excellent in ductility and formability by subjecting a steel stock to plastic working in an austenitic temp. region, forming the stock while holding it at a super cooled austenite temp., and then applying shot peening to the above. CONSTITUTION:A stock made of steel is heated up to an austenitizing temp., which is subjected to plastic working, such as rolling, in a stable austenite temp. region or in a super cooled austenite region at <= about 50% draft. The stock after plastic working is quenched down to a super cooled austenite temp. and isothermally held at the above temp., by which bainite transformation or a partial martensitic transformation is allowed to occur in the structure of the stock and also retained austenite is allowed to remain at a fixed content. Further, in the above isothermal holding stage, the above stock is formed into the prescribed spring shape, such as eye part and camber, in the course of the above martensitic transformation or after the conclusion of the above transformation. The resulting formed part for spring is quenched after the conclusion of the above forming to undergo structure freezing and is then subjected to shot peening. By this method, settling resistance can be improved by forming the retained austenite in the surface layer part of the spring into martensite, and further, even fatigue resistance can be improved by applying compressive stress.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、例えば自動車の懸架用板ばねや巻ばね、トー
ションバー等の各種ばね、あるいはばねに類似した部材
に利用される高強度ばねの製造方法に関する。
[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to high-strength springs used in various springs such as automobile suspension leaf springs, coil springs, and torsion bars, or members similar to springs. Regarding the manufacturing method.

[従来の技術] ばねの高強度化を図るための手段として、従来、焼戻し
硬さを上げて材料そのものの強度を上げる゛方法や、曲
げ応力を付与した状態でテンション側にショットピーニ
ングを行なうストレスピーニングによって圧縮残留応力
を増加させて疲労強度を向上させる方法、あるいはセッ
チング時の応力を増加させて耐ぺ・たり性を向上させる
方法などが行なわれている。ところが、例えば5UP9
の場合、ビッカース硬さがHv51S以上になると、延
性に乏しいためにストレスピーニング時の初期応力やセ
ッチング時の応力を高くした場合に折損することがある
[Prior art] Conventionally, methods for increasing the strength of springs include increasing the strength of the material itself by increasing the tempering hardness, and applying shot peening to the tension side while applying bending stress. Methods of improving fatigue strength by increasing compressive residual stress through peening, and methods of increasing slip resistance by increasing stress during setting, etc., have been used. However, for example, 5UP9
In the case of , if the Vickers hardness is Hv51S or higher, the ductility is poor and the steel may break if the initial stress during stress peening or the stress during setting is increased.

一方、延性の低下をある程度防ぐ手段としてモディファ
イド・オースフォーミング(修正オースフォーミング)
なる加工熱処理が知られている。
On the other hand, modified ausforming is a method to prevent the decrease in ductility to some extent.
A processing heat treatment is known.

修正オースフォーミングは、第7図に示されたヒートパ
ターンのように、素材をオーステナイト化温度まで加熱
するとともに、安定オーステナイト域で圧延等の加工を
行ない、その後に直ちに焼入れを行なうことにより、残
留オーステナイトとマルテンサイトが混在した組織を得
るようにしている。
In modified ausforming, as shown in the heat pattern shown in Figure 7, the material is heated to the austenitizing temperature, processed by rolling etc. in the stable austenite region, and then immediately quenched to remove residual austenite. The aim is to obtain a structure in which martensite and martensite are mixed.

[発明が解決しようとする課題] 前述した修正オースフォーミングによって得られる組織
は、結晶粒が微細化するため延性をあまり低下させるこ
となく強度を向上させることができるが、ベースとなる
組織が焼戻しマルテンサイトであるため延性に限界があ
る。このため、5UP9の場合、修正オースフォーミン
グによってストレスピーニングやセッチング時の折損限
界硬さをHv550程度まで向上できるが、これ以上の
高硬さになるとやはり折損するようになる。このため、
Nb、V等の再結晶抑制元素やMO等の強化元素を添加
することにより折損限界硬さを向上させる対策がとられ
ている。こうして、現在のところHv580程度まで限
界が向上したが、これ以上の硬さでは折損してしまう。
[Problems to be Solved by the Invention] The structure obtained by the above-mentioned modified ausforming can improve strength without significantly reducing ductility because the crystal grains become finer. Because it is a site, there is a limit to its ductility. Therefore, in the case of 5UP9, the breaking limit hardness during stress peening and setting can be improved to about Hv550 by modified ausforming, but if the hardness is higher than this, it will still break. For this reason,
Measures have been taken to improve the breaking hardness by adding recrystallization suppressing elements such as Nb and V and reinforcing elements such as MO. In this way, the limit has been improved to about Hv580 at present, but if the hardness is higher than this, it will break.

また、修正オースフォーミングは素材が高温の安定オー
ステナイト域にあるうちに全ての加工を終了しなければ
ならないため加工時間の制約が大きく、場合によっては
加工終了時点で素材温度がかなり低下してしまい、焼入
れが不足することがある。そうかといって、素材の一部
を再加熱すれば、せっかくのオースフォーミング効果が
大きく減ぜられてしまう。
In addition, in modified ausforming, all machining must be completed while the material is in the stable austenite region at high temperature, so machining time is severely restricted, and in some cases, the material temperature may drop considerably at the end of machining. Quenching may be insufficient. However, if part of the material is reheated, the ausforming effect will be greatly reduced.

また従来のオースフォーミングと修正オースフォーミン
グは、−いずれも焼戻しを行なわなければ所望硬さに調
質することが困難であった。
Furthermore, in both conventional ausforming and modified ausforming, it is difficult to achieve desired hardness without tempering.

従って本発明の目的は、ストレスピーニングやセッチン
グ時に折損することがないような延性に富んだ高硬さの
ばねが得られるとともに大きな圧縮残留応力を付与でき
、しかも所望のばね形状への成形加工が容易であり、し
かも焼戻し工程を経ることな(所望の硬さに調質できる
ような高強度ばねの製造方法を提供することにある。
Therefore, an object of the present invention is to obtain a spring with high ductility and high hardness that will not break during stress peening or setting, and which can apply a large compressive residual stress, and which can be formed into a desired spring shape. The object of the present invention is to provide a method for manufacturing a high-strength spring that is easy and can be tempered to a desired hardness without going through a tempering process.

[課題を解決するための手段] 上記目的を果たすために本発明者が開発した高強度ばね
の製造方法は、鋼製素材をオーステナイト化温度まで加
熱する工程と、この素材を安定オーステナイト温度域あ
るいは過冷オーステナイト域で圧延やドローイング等の
塑性加工を行なう工程と、塑性加工後の素材を過冷オー
ステナイト温度に保持することによってベイナイト変態
あるいは一部マルテンサイト変態を生じさせかつ残留オ
ーステナイトを残すとともに所定のばね形状への成形(
板ばねの場合は目玉成形やキャンバ加工等)を行なう工
程と、この成形工程の後にショットピニングを行なうこ
とによって表層部の残留オーステナイトをマルテンサイ
ト化させる工程とを具備したことを特徴とする。
[Means for Solving the Problems] In order to achieve the above object, the method for manufacturing a high-strength spring developed by the present inventor includes a step of heating a steel material to an austenitizing temperature, and a process of heating this material to a stable austenite temperature range or A process of performing plastic working such as rolling or drawing in the supercooled austenite region and holding the material after plastic working at the supercooled austenite temperature causes bainite transformation or partial martensitic transformation, leaving residual austenite and forming a predetermined shape. Forming into a spring shape (
In the case of a leaf spring, the method is characterized by comprising a step of performing eye forming, camber processing, etc.) and a step of converting residual austenite in the surface layer into martensite by performing shot pinning after this forming step.

[作用] 安定オーステナイト域あるいは過冷オーステナイト域で
圧延等の塑性加工が行なわれることによって加工硬化し
た素材は、過冷オーステナイト温度域で一定時間保持さ
れることによってベイナイトに変態するとともに残留オ
ーステナイトが残る。
[Function] Materials that have been work-hardened by plastic working such as rolling in the stable austenite region or supercooled austenite region are transformed into bainite by being held in the supercooled austenite temperature range for a certain period of time, and residual austenite remains. .

ベイナイトと残留オーステナイトが混在した組織は、ベ
イナイトのみの組織に比べて延性が大きいため、目玉部
の成形やキャンバの付与等の加工を比較的容易に行なう
ことができ、しかも等温保持中に上記の加工を行なえば
よいから、加工時間の制約が少ない。その後に急冷され
ることによって焼入れが行なわれた組織に、ショットピ
ーニングが実施されることによって、表層部の残留オー
ステナイトがマルテンサイトに変化し、硬さが向上する
とともに充分な圧縮残留応力が付与される。
A structure containing a mixture of bainite and retained austenite has greater ductility than a structure containing only bainite, so it is relatively easy to process such as shaping the eye area and adding camber. Since all you have to do is process, there are fewer restrictions on processing time. Shot peening is then applied to the quenched structure, which changes the retained austenite in the surface layer to martensite, improving hardness and imparting sufficient compressive residual stress. Ru.

[実施例] 以下に本発明の一実施例について、第1図の工程説明図
あるいは第2図の温度履歴図等を参照して説明する。本
実施例は、いわゆるロングテーパ板ばねを製造する場合
である。この種の板ばねは、センタ一部の板厚が最も厚
く、板端の目玉部に向かって板厚が漸減する。
[Example] An example of the present invention will be described below with reference to the process diagram of FIG. 1 or the temperature history diagram of FIG. 2. In this embodiment, a so-called long taper leaf spring is manufactured. In this type of leaf spring, the thickness of the center portion is the thickest, and the thickness gradually decreases toward the center portion at the end of the leaf.

まず、ばね鋼(S U P 9 + 0.20V + 
o、25M、 )からなる素材を850℃ないし100
0℃のオーステナイト化温度まで加熱する。そして圧延
ロールを用いることにより、第3図に模式的に示されて
いるようなテーパ形状に成形する。この塑性加工は、加
工率が50%を越えないようにして行なう。センタ一部
の加工率は約20%である。ここでいう加工率とは、圧
延前の素材の厚さをto、圧延による減少厚をtlとし
た場合に、t1/l□ xtooで表わされる値である
First, spring steel (S U P 9 + 0.20V +
o, 25M, ) at 850℃ to 100℃
Heat to austenitizing temperature of 0°C. Then, by using a rolling roll, it is formed into a tapered shape as schematically shown in FIG. This plastic working is performed so that the working rate does not exceed 50%. The machining rate of a part of the center is about 20%. The working rate here is a value expressed as t1/l□xtoo, where to is the thickness of the material before rolling, and tl is the reduced thickness due to rolling.

上記工程で圧延された組織は加工硬化を生じ、後に行な
われる冷却によって残留オーステナイトを生じさせるこ
とができるようになる。第4図に示されるように、加工
率が大きいほど残留オーステナイトの発生量が多くなる
ことが知られているが、第5図に示されるように加工率
40〜50%付近に耐久回数の最大値があり、加工率が
50%を越えるあたりから耐久回数の減少が認められる
とともに残留オーステナイトが急増する傾向となるため
、加工率は最大でも50%までとする。第3図に示され
ているテーパ板ばね用素材11の場合、目玉部12の付
根近傍における加工率が最大になるから、この箇所の加
工率が50%を越えないように圧延ロールの圧下量を制
御する。そして圧延後にセンタ孔等の孔あけ、加工を行
なう。以上の一連の加工は素材が700℃以下に下がら
ないうちに完了させる。
The structure rolled in the above process undergoes work hardening, and retained austenite can be produced by subsequent cooling. As shown in Figure 4, it is known that the higher the working rate, the greater the amount of retained austenite generated. When the processing rate exceeds 50%, the number of durability cycles decreases and retained austenite tends to increase rapidly, so the processing rate is set to 50% at most. In the case of the tapered leaf spring material 11 shown in FIG. 3, the processing rate near the base of the eyeball part 12 is maximum, so the reduction amount of the rolling rolls should be adjusted so that the processing rate at this location does not exceed 50%. control. After rolling, holes such as a center hole are drilled and processed. The above series of processing is completed before the temperature of the material drops below 700°C.

上記圧延工程が終了したのちに、素材を350 ”Cな
いし500℃の過冷オーステナイト温度まで急冷させる
とともに、過冷オーステナイト域に等温保持する。等温
保持の手段としては、上記温度に保持された炉を使用す
る以外に、例えばソルトバスに浸漬する。方法も採用で
きる。この等温保持工程において、素材の組織がベイナ
イト変態を生じるとともに、一定の含有率で残留オース
テナイトが残る。なお、上記冷却過程で素材温度が一時
的に350℃以下に下がってしまうと、組織中に微量な
がらマルテンサイトを生じるが、その量は僅かであるた
め特に問題にはならない。この等温保持工程においてベ
イナイト変態時の温度と保持時間等を調整することによ
り、マルテンサイトと残留オーステナイトの量を加減す
ることができるとともに、焼戻しを行なわずしてHv4
10ないしHv850の範囲で任意硬さの調質が行なえ
る。
After the above rolling process is completed, the material is rapidly cooled to a supercooled austenite temperature of 350"C to 500°C, and isothermally maintained in the supercooled austenite region. As a means of isothermal maintenance, a furnace maintained at the above temperature is used. In addition to using, for example, immersion in a salt bath, a method can also be adopted.In this isothermal holding process, the structure of the material undergoes bainite transformation, and residual austenite remains at a certain content.In addition, in the cooling process described above, If the material temperature temporarily drops below 350°C, a small amount of martensite will occur in the structure, but the amount is so small that it does not pose a particular problem.In this isothermal holding process, the temperature at which bainite transformation occurs is By adjusting the holding time etc., the amount of martensite and retained austenite can be controlled, and Hv4 can be achieved without tempering.
Tempering can be done to any hardness within the range of 10 to 850 Hv.

上記の等温保持工程において、ベイナイトへの変態中あ
るいはベイナイト変態が終了した後に、目玉部の巻回成
形やキャンバ付与等の成形加工が行なわれ、所定の製品
形状に仕上げられる。第6図に5UP6の場合を示した
ように、ベイナイトと残留オーステナイトとからなる組
織は、ベイナイトのみの組織に比較して、強度が同一で
あれば均−伸びが大きくなり、延性が大幅に向上する。
In the above-mentioned isothermal holding step, during or after the transformation to bainite is completed, forming processes such as winding of the eye portion and imparting camber are performed to finish the product into a predetermined shape. As shown in Figure 6 for 5UP6, a structure consisting of bainite and retained austenite has a higher uniform elongation and significantly improved ductility than a structure containing only bainite for the same strength. do.

従って目玉の巻回成形のような強加工にも充分耐える。Therefore, it can withstand strong processing such as winding of eyeballs.

以上の成形加工が終了したのち、急冷することによって
組織を凍結させる。そして急冷後のばねにショットピー
ニングを行なうことによって耐へたり性を向上させる。
After the above molding process is completed, the tissue is frozen by rapid cooling. After the spring has been rapidly cooled, shot peening is applied to the spring to improve its resistance to fatigue.

ショットピーニングによって表層部の残留オーステナイ
トがマルテンサイトに加工変態して膨張することにより
、ばね表層部の硬さがベイナイトよりも上昇するととも
に圧縮残留応力が生じるため、耐疲労性にとって好まし
い硬さ分布が得られる。なお、ショットピーニング前に
残留オーステナイトが40%以上残っていると、ショッ
トピーニングを行なっても残留オーステナイトの一部が
マルテンサイトに変態せずにオーステナイトのまま残る
。最終製品にオーステナイトが残っていると耐へたり性
の低下をもたらすため、ショットピーニング前の残留オ
ーステナイト量が40%を越えないように調整を行なう
Due to shot peening, residual austenite in the surface layer transforms into martensite and expands, making the surface layer of the spring harder than bainite and generating compressive residual stress, resulting in a hardness distribution that is favorable for fatigue resistance. can get. Note that if 40% or more of retained austenite remains before shot peening, a part of the retained austenite will not transform into martensite and will remain as austenite even after shot peening. If austenite remains in the final product, it will reduce the resistance to settling, so the amount of residual austenite before shot peening is adjusted so that it does not exceed 40%.

なお、ショットピーニング後に必要に応じてセッチング
工程および塗装工程等を経て製品となる。
Note that after shot peening, the product is made into a product through a setting process, a painting process, etc. as necessary.

従来のHv51B〜650の高硬さ板ばねは、ストレス
ピーニング時やセッチング時に破損することがあったが
、本実施例方法によって高強度化されたばねは、破損を
全く生じることなくストレスピーニングとセッチングを
行なうことができた。
Conventional high-hardness leaf springs with Hv51B to Hv650 were sometimes damaged during stress peening and setting, but the springs made high in strength by the method of this example can be stress peened and set without any damage. I was able to do it.

前述した実施例では素材の圧延を安定オーステナイト域
で行なっているが、本発明は圧延等の塑性加工を過冷オ
ーステナイト域で行なってもほぼ同等の効果が得られる
。また本発明は板ばねに限らず、例えばコイルばね等の
線ばねにも適用できる。線ばねの場合にはダイス等の治
具を用いて、安定オーステナイト域あるいは過冷オース
テナイト域でドローイング等の塑性減面加工を行なう。
In the embodiments described above, the material is rolled in the stable austenite region, but in the present invention, almost the same effect can be obtained even if plastic working such as rolling is performed in the supercooled austenite region. Further, the present invention is not limited to leaf springs, but can also be applied to wire springs such as coil springs. In the case of wire springs, a jig such as a die is used to perform plastic area reduction processing such as drawing in the stable austenite region or supercooled austenite region.

トーションバーのように外径の太いばねの場合には、ス
ェージングマシン等によって減面加工してもよい。
In the case of a spring with a large outer diameter such as a torsion bar, the surface area may be reduced using a swaging machine or the like.

[発明の効果] 本発明方法によって製造された高強度ばねは、ベイナイ
トがベースになっており、延性が大きいため、ストレス
ピーニングやセッチング等を大きな応力のもとで行なっ
ても折損することがない。
[Effects of the Invention] The high-strength spring manufactured by the method of the present invention is based on bainite and has high ductility, so it will not break even when subjected to stress peening, setting, etc. under large stress. .

また、ベイナイトに変態する時の温度と保持時間を調整
することにより、焼入れ状態のままで調質が行なえ、焼
戻しをせずにそのまま製品として使用できるから、熱処
理工程の簡略化が図れる。また、延性の大きなベイナイ
ト+微量マルテンサイト+残留オーステナイトの組織下
で、目玉部の巻回成形やキャンバ付与等の加工を、加工
時間に余裕のある等温保持中に行なえるから成形が容易
であり、再加熱の必要もない。そしてショットピーニン
グによる残留オーステナイトのマルテンサイト化によっ
て、耐疲労性と耐へたり性にとって好ましい圧縮残留応
力分布と硬さ分布が得られる。
Furthermore, by adjusting the temperature and holding time when transforming into bainite, thermal refining can be performed in the quenched state, and the product can be used as it is without tempering, which simplifies the heat treatment process. In addition, under the structure of highly ductile bainite + a small amount of martensite + retained austenite, processing such as winding of the eye area and imparting camber can be carried out while holding the temperature at a sufficient temperature with plenty of processing time, making it easy to form. , no need for reheating. By converting the retained austenite into martensite by shot peening, a compressive residual stress distribution and hardness distribution favorable for fatigue resistance and setting resistance can be obtained.

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

第1図は本発明の一実施例を示す工程説明図、第2図は
第1図に示された実施例の温度履歴図、第3図は圧延後
の形状を示す側面図、第4図は加工率と残留オーステナ
イト量との関係を示す図、第5図は加工率と耐久性との
関係を示す図、第6図は残留オーステナイトを含有する
ベイナイトの強度−延性バランスを示す図、第7図は従
来の修正オースフォーミングの温度履歴を示す図である
。 出願人代理人 弁理士 鈴江武彦 第2図 第3図 第1図 カロエΦ (’/、) 第 図 第 図 51帳潰こ (MPa) 第 図 第 図
Fig. 1 is a process explanatory diagram showing one embodiment of the present invention, Fig. 2 is a temperature history diagram of the embodiment shown in Fig. 1, Fig. 3 is a side view showing the shape after rolling, Fig. 4 is a diagram showing the relationship between the working rate and the amount of retained austenite, Figure 5 is a diagram showing the relationship between working rate and durability, Figure 6 is a diagram showing the strength-ductility balance of bainite containing retained austenite, FIG. 7 is a diagram showing the temperature history of conventional modified ausforming. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3 Figure 1 Caloe Φ ('/,) Figure Figure 51 Calorie (MPa) Figure Figure

Claims (2)

【特許請求の範囲】[Claims] (1)鋼製素材をオーステナイト化温度まで加熱する工
程と、オーステナイト温度域で上記素材の塑性加工を行
なう工程と、塑性加工後の素材を過冷オーステナイト温
度に保持することによってベイナイト変態あるいは一部
マルテンサイト変態を生じさせかつ残留オーステナイト
を残すとともに所定のばね形状に成形する工程と、この
成形工程の後にショットピーニングを行なうことによっ
て表層部の残留オーステナイトをマルテンサイト化させ
る工程とを具備したことを特徴とする高強度ばねの製造
方法。
(1) A step of heating the steel material to the austenitizing temperature, a step of plastic working the material in the austenite temperature range, and a step of holding the material after the plastic working at the supercooled austenite temperature to undergo bainitic transformation or partial A process of causing martensitic transformation and leaving residual austenite while forming it into a predetermined spring shape, and a process of converting the residual austenite in the surface layer into martensite by performing shot peening after this forming process. A manufacturing method for high-strength springs.
(2)鋼製素材をオーステナイト化温度まで加熱する工
程と、過冷オーステナイト域で上記素材の塑性加工を行
なう工程と、塑性加工後の素材を過冷オーステナイト温
度に保持することによってベイナイト変態あるいは一部
マルテンサイト変態を生じさせかつ残留オーステナイト
を残すとともに所定のばね形状に成形する工程と、この
成形工程の後にショットピーニングを行なうことによっ
て表層部の残留オーステナイトをマルテンサイト化させ
る工程とを具備したことを特徴とする高強度ばねの製造
方法。
(2) A step of heating the steel material to the austenitizing temperature, a step of plastic working the material in the supercooled austenite region, and a step of holding the material after the plastic working at the supercooled austenite temperature to cause bainite transformation or A process of causing partial martensitic transformation and leaving residual austenite while forming it into a predetermined spring shape, and a process of converting the residual austenite in the surface layer into martensite by performing shot peening after this forming process. A method for manufacturing a high-strength spring characterized by:
JP1034426A 1989-02-14 1989-02-14 Manufacturing method of high strength spring Expired - Lifetime JP2774808B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1034426A JP2774808B2 (en) 1989-02-14 1989-02-14 Manufacturing method of high strength spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1034426A JP2774808B2 (en) 1989-02-14 1989-02-14 Manufacturing method of high strength spring

Publications (2)

Publication Number Publication Date
JPH02213422A true JPH02213422A (en) 1990-08-24
JP2774808B2 JP2774808B2 (en) 1998-07-09

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ID=12413887

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2774808B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101907145A (en) * 2010-08-23 2010-12-08 西安航空动力股份有限公司 Forming method for high-temperature alloy sine bellows spring
JP2012509989A (en) * 2008-11-24 2012-04-26 ヴェヴェレル ネーデルラント ベスローテン フェンノートシャップ Method for curing flexible support arm
CN102489943A (en) * 2011-11-28 2012-06-13 贵州红林机械有限公司 Method for manufacturing waved springs
CN110157863A (en) * 2019-05-14 2019-08-23 北京航空航天大学 A method of preparing double tissue 60Si2CrVA springs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102248097A (en) * 2011-06-08 2011-11-23 沈阳飞机工业(集团)有限公司 Compression spring processing process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115926A (en) * 1979-02-28 1980-09-06 Nippon Steel Corp Production of high strength coil spring

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115926A (en) * 1979-02-28 1980-09-06 Nippon Steel Corp Production of high strength coil spring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012509989A (en) * 2008-11-24 2012-04-26 ヴェヴェレル ネーデルラント ベスローテン フェンノートシャップ Method for curing flexible support arm
CN101907145A (en) * 2010-08-23 2010-12-08 西安航空动力股份有限公司 Forming method for high-temperature alloy sine bellows spring
CN102489943A (en) * 2011-11-28 2012-06-13 贵州红林机械有限公司 Method for manufacturing waved springs
CN110157863A (en) * 2019-05-14 2019-08-23 北京航空航天大学 A method of preparing double tissue 60Si2CrVA springs

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