JPS63128152A - Spring steel having superior settling fatigue resistance - Google Patents
Spring steel having superior settling fatigue resistanceInfo
- Publication number
- JPS63128152A JPS63128152A JP27502186A JP27502186A JPS63128152A JP S63128152 A JPS63128152 A JP S63128152A JP 27502186 A JP27502186 A JP 27502186A JP 27502186 A JP27502186 A JP 27502186A JP S63128152 A JPS63128152 A JP S63128152A
- Authority
- JP
- Japan
- Prior art keywords
- fatigue
- fatigue resistance
- setting
- resistance
- content
- 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.)
- Pending
Links
- 229910000639 Spring steel Inorganic materials 0.000 title claims abstract 3
- 229910052721 tungsten Inorganic materials 0.000 claims abstract 5
- 239000012535 impurity Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 12
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 239000002244 precipitate Substances 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 238000005496 tempering Methods 0.000 abstract description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract 4
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 14
- 239000010949 copper Substances 0.000 description 14
- 238000012545 processing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 2
- 230000000376 effect on fatigue Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 241001124569 Lycaenidae Species 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 235000014987 copper Nutrition 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は耐へたり性と耐疲労性の優れたばね用銅に関し
、さらに詳しくは、高速、高回転化に耐えられる高性能
を存する耐へたり性と耐疲労性にすぐれたばね用銅に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to copper for springs that has excellent fatigue resistance and fatigue resistance, and more specifically relates to copper that has high performance and can withstand high speeds and high rotations. Concerning copper for springs that has excellent durability and fatigue resistance.
［従来技術］
従来より、ばね用銅の化学成分はＪ Ｉ Ｓ Ｇ３５６
５〜Ｇ ３５６７、Ｇ４８０１に規定されており、これ
らのばね用銅から製造されたロッドを、伸線を繰り返し
て４φ前後のばねに加工したり、また、ロッド→１回伸
線後ＯＴ処理ばね加工（冷間巻きばね）、さらに、１回
伸線後、加熱→ばね加工→焼戻しく熱間巻きばね）によ
って製作されている。そして、このような工程によって
製作されたばねの重要特性として耐へたり性および耐疲
労性が挙げられる。[Prior art] Conventionally, the chemical composition of copper for springs is JIS G356.
5 to G 3567, G4801, rods made from these spring coppers are processed into springs of around 4φ by repeated wire drawing, or OT treated springs after the rod is drawn once. It is manufactured by processing (cold coiled spring), and then, after drawing once, heating → spring processing → hot coiled spring). Important characteristics of springs manufactured through such processes include fatigue resistance and fatigue resistance.
しかし、上記の化学成分系ではどうしても対応できない
ような、高速、高回転化に耐える高性能を有するばねが
要求されるようになり、現在のばね用銅では充分に満足
できなくなってきている。However, there is now a demand for springs with high performance that can withstand high speeds and high rotations, which cannot be met by the above chemical composition system, and the current copper for springs is no longer able to fully satisfy this demand.
［発明が解決しようとする問題点］
本発明は上記に説明したように従来におけるばね鋼の問
題点に鑑み、本発明者が鋭意研究を行い、検討を重ねた
結果、耐へたり性および耐疲労性に優れ、さらに、高速
、高回転化の耐える高性能のばね用銅を開発したのであ
る。[Problems to be Solved by the Invention] As explained above, in view of the problems of conventional spring steels, the present inventor has conducted intensive research and has made numerous studies, and as a result, the present invention has been developed to improve the fatigue resistance and durability. They developed a high-performance copper for springs that has excellent fatigue resistance and can withstand high speeds and high rotations.
［問題点を解決するための手段］
本発明に係る耐へたり性および耐疲労性の優れたばね用
銅の特徴とするところは、
Ｇ ０．３（１〜０．８０ｗｔ％、Ｓ ｉ ０．５０〜
２．００ｗｔ％、Ｍｎ ０．４０〜１．５０ｗｔ％、Ｃ
ｒ ０．２０〜１．００ｗｔ％、Ａ１０．０４〜０．１
０ｗｔ％、ｗ ｏ、ｏａ〜１．Ｏｈｔ％、Ｎ ０．００
２〜０．０１５ｗｔ％
を含有し、さらに、
Ｍｏ ０．０５〜２．００ｗｔ％、Ｖ ０．０５〜０．
５ｖｔ％の１種または２種
を含有し、残部Ｆｅおよび不可避不純物からなることに
ある。[Means for Solving the Problems] The copper for springs according to the present invention, which has excellent fatigue resistance and fatigue resistance, has the following characteristics: G 0.3 (1 to 0.80 wt%, Si 0. 50~
2.00wt%, Mn 0.40-1.50wt%, C
r 0.20-1.00wt%, A10.04-0.1
0wt%, w o, oa~1. Oht%, N 0.00
2 to 0.015 wt%, and further contains Mo 0.05 to 2.00 wt%, V 0.05 to 0.
It contains 5vt% of one or two types, and the remainder consists of Fe and unavoidable impurities.
本発明に係る耐へたり性と耐疲労性の優れたばね用銅に
ついて以下詳細に説明する。The copper for springs having excellent fatigue resistance and fatigue resistance according to the present invention will be described in detail below.
先ず、本発明に係る耐へたり性と耐疲労性の優れたばね
用銅の含有成分および含有割合について説明する。First, the components and content ratio of the copper for springs having excellent fatigue resistance and fatigue resistance according to the present invention will be explained.
Ｃは含有量が０Ｊｈｔ％未満では所定の強度が得られず
、また、０．８０ｖｔ％を越えて含有されると絞りが低
下する。さらには、ばね製造時の表面脱炭および表面疵
を除去するための切削および研削による素材加工を容易
にすることを狙いとしている。よって、Ｃ含有量は ０
．３０〜０．８０ｖｔ％とする。If the C content is less than 0 Jht%, the desired strength cannot be obtained, and if the C content exceeds 0.80 Vt%, the reduction of area is reduced. Furthermore, the aim is to facilitate material processing by cutting and grinding to remove surface decarburization and surface flaws during spring manufacturing. Therefore, the C content is 0
．． 30 to 0.80vt%.
Ｓｉは含有量が０．５０ｗｔ％未満ではＳｉによるマト
リックスの強化が充分得られなくなり、耐へたり性を向
上させることが充分できなく、また、Ｓｉ含有量の上限
を２．００ｗｔ％としたのはＳｉによるマトリックス強
化が飽和する点であるため耐へたり性に対する効果が望
むことができず、さらに、Ｓｉ含有量の増加に伴い内部
酸化が進行し、ばね用銅として有害である脱炭を生じさ
せるようになるからである。よって、Ｓｉ含有量は０．
５０〜２．００ｗｔ％とする。If the Si content is less than 0.50 wt%, the matrix will not be sufficiently strengthened by Si, and the fatigue resistance will not be sufficiently improved. Since this is the point at which the matrix reinforcement by Si is saturated, no effect on fatigue resistance can be expected.Furthermore, as the Si content increases, internal oxidation progresses, causing decarburization, which is harmful to copper for springs. This is because it causes it to occur. Therefore, the Si content is 0.
The content is 50 to 2.00 wt%.
Ｍｎは含有量が０．４０ｗｔ％未満ではばね用銅として
強度が不足し、さらには、焼入れ性の点で不充分であり
、また、ｌ 、 ５０ｗｔ％を越えて含有されるとへた
り性に対して有害である残留オーステナイト量を抑制す
ることができない。よって、Ｍｎ含有量は０．４０〜１
．５ｈｔ％とする。If the content of Mn is less than 0.40 wt%, the strength as copper for springs will be insufficient, and furthermore, the hardenability will be insufficient, and if the content exceeds 50 wt%, it will have a tendency to set. It is not possible to suppress the amount of retained austenite, which is harmful to steel. Therefore, the Mn content is 0.40 to 1
．． 5ht%.
Ｃｒは焼入れ性を良好とし、耐熱性を向上させる元素で
あり、含有量が０．２０ｗｔ％未満では充分な焼入れ性
効果が得られず、また、１．００ｗｔ％を越えて多く含
有させても耐へたり性に効果がない。Cr is an element that improves hardenability and heat resistance, and if the content is less than 0.20 wt%, sufficient hardenability effects cannot be obtained, and even if it is contained in a large amount exceeding 1.00 wt%. No effect on fatigue resistance.
よって、Ｏｒ含有量は０．２０〜１．０ｈｔ％とする。Therefore, the Or content is set to 0.20 to 1.0 ht%.
ＡＩは結晶粒度を微細化し、耐へたり性を改善する元素
であり、含有量が０．０４ｗｔ％未満では耐へたり性の
効果が不充分であり、また、０．ｌｈｔ％を越えて含有
されると窒化物量が鋼中に増加し、非金属介在物が肥大
し、耐疲労性が悪くなる。よって、ＡＩ含有量は０．０
４〜０． ｌｏｖｔ％とする。AI is an element that refines the crystal grain size and improves the resistance to settling, and if the content is less than 0.04 wt%, the effect of the resistance to setting is insufficient; When the content exceeds lht%, the amount of nitrides increases in the steel, nonmetallic inclusions become enlarged, and fatigue resistance deteriorates. Therefore, AI content is 0.0
4-0. Let it be lovt%.
Ｗは鋼中で炭化物を形成し、焼戻し時に析出することに
より、微細析出強化を付与する元素であり、含有量が０
．０３ｗｔ％未満では析出量が不足し、また、１．００
ｗｔ％を越えて含有されると効果が飽和する。よって、
Ｗ含有量は０．０３〜１．０ｈｔ％とする。W is an element that forms carbides in steel and precipitates during tempering, giving fine precipitation strengthening.
．． If it is less than 0.03 wt%, the precipitation amount will be insufficient, and if it is less than 1.00 wt%, the amount of precipitation will be insufficient.
If the content exceeds wt%, the effect will be saturated. Therefore,
The W content is 0.03 to 1.0 ht%.
ＮはＡＩと結合して結晶粒度を微細化し、耐へたり性を
向上させるためには、含有ｍは少なくとも０．００２ｗ
ｔ％は必要であり、また、０．０１！ｍ％を越えて含有
されると粗大なＡＩＮがオーステナイト粒界に析出し、
鋼の分塊加工時に割れが発生したり、オイルテンパー線
においても材料の延性が低下する。よって、Ｎ含有量は
０．００２〜０．０１５ｗｔ％とする。In order to combine N with AI to refine the grain size and improve the resistance to settling, the content m should be at least 0.002w.
t% is necessary and 0.01! If the content exceeds m%, coarse AIN will precipitate at the austenite grain boundaries,
Cracks occur during blooming of steel, and the ductility of the material decreases even in oil tempered wire. Therefore, the N content is set to 0.002 to 0.015 wt%.
Ｍｏは含有量が０．０５ｗｔ％未満ではへたりおよび疲
労に対して充分な効果が得られず、また、２．００ｗｔ
％を越えて含有させても耐へたり性に効果はない。よっ
て、Ｍｏ含有量は０．０５〜２．００ｗｔ％とする。If the Mo content is less than 0.05 wt%, sufficient effects against fatigue and fatigue cannot be obtained;
Even if the content exceeds %, there is no effect on the sag resistance. Therefore, the Mo content is set to 0.05 to 2.00 wt%.
■は結晶粒度を微細化し、耐力比を上げることにより耐
へたり性に効果がある元素であり、含有量が０．０５ｗ
ｔ％未満ではへたりおよび疲労に対して効果か得られず
、また、０．５ｗｔ％を越えて含有されると、オーステ
ナイト中に溶解されない合金炭化物が増加し、大きな塊
となって残り非金属介在物となって耐疲労性を損なう。■ is an element that is effective in improving fatigue resistance by refining the grain size and increasing the yield strength ratio, and the content is 0.05w.
If the content is less than 0.5 wt%, no effect will be obtained on fatigue and fatigue, and if the content exceeds 0.5 wt%, the amount of alloy carbides that will not be dissolved in the austenite will increase, forming large lumps and forming non-metallic substances. They become inclusions and impair fatigue resistance.
よって、■含有量は０．０５〜０．５ｗｔ％とする。Therefore, (1) content is set to 0.05 to 0.5 wt%.
し実 施 例］
次ぎに、本発明に係る耐へたり性と耐疲労性の優れたば
ね用銅の実施例を説明する。Examples] Next, examples of the copper for springs having excellent fatigue resistance and fatigue resistance according to the present invention will be described.
実施例
第１表に示す含有成分および含有割合の鋼を次ぎに示す
（１）によりばね加工を行った。（１）溶製−分塊また
は連続鋳造−圧延一熱処理一皮削り伸線→ばね加工
製作されたばねの機械的性質および残留Ｉｆ断歪、疲労
限について試験を行い、その結果を第２表に示す。EXAMPLE Steel having the components and proportions shown in Table 1 was subjected to spring processing according to (1) below. (1) Melting - Blowing or continuous casting - Rolling - Heat treatment - Skin shaving Wire drawing -> Spring processing The manufactured springs were tested for mechanical properties, residual If strain, and fatigue limit, and the results are shown in Table 2. show.
［試験］
（１）残留剪断歪＝へたり
くばね諸元〉
材料の線径 （ｍｍ）ｄ ４．０コイル平
均径 （ｎｕｎ）Ｄ ２８．０総巻数
（巻） ｎ ６．５有効巻数 （巻）
ｎｅ ４．５自由高さ （ｍｍ） Ｈ，６
０，０くセッチング応力〉
引張強さの１／２の応力
〈試験条件〉
締付応力 ： ７０ Ｋｇｆ／ｍｌ１１”（ワールの
修正係数含む）
試験温度 ： ２３０℃×９６時間
く残留剪断歪の算出方法〉
τ ＝８Ｄ／πｄ３・△Ｐ−会・・・ （１）ｙ
τ ＝Ｇγ ・・・・・・・・ （２）（１）式（
２）式より
７ａｐ ＝ ｒ ＡＰ ／ Ｇ Ｘ １００ （％）た
だし、
τ４．＝荷重損失量に相当するねじり応力（Ｋｇｆ’／
ｎｕ＋＋す
ｄ ＝線径（ａｕ＊）
Ｄ＝コイル平均径（ａｒｍ）
ッ＝荷重損失量
Ｇ＝横連弾性係数Ｋｇｆ／１つ
（８０００Ｋｇｆ／ｎ″を採用）
（２）疲労限＝疲労
く試験条件〉
試験温度 ： 室温
時間寿命 ： １０７回をクリアー
表面状態 ： °ショットピーニング済〈疲労限の判定
〉
１０７回をｎ＝２ クリアーした時の試験応力この第
２表より本発明に係る耐へたり性と耐疲労性の優れたば
ね用銅は、比較鋼に比べて優れていることがわかる。[Test] (1) Residual shear strain = Flat spring specifications> Wire diameter of material (mm) d 4.0 Average coil diameter (nun) D 28.0 Total number of turns
(Volumes) n 6.5 Effective number of volumes (Volumes)
ne 4.5 Free height (mm) H, 6
0,0 setting stress> Stress of 1/2 of tensile strength <Test conditions> Tightening stress: 70 Kgf/ml11" (including Wahl's correction coefficient) Test temperature: 230°C x 96 hours Calculation of residual shear strain Method〉 τ = 8D/πd3・△P−kai... (1) y τ = Gγ ・・・・・・・・・ (2) Equation (1) (
2) From the formula, 7ap = r AP / G X 100 (%) However, τ4. = Torsional stress (Kgf'/
nu++sd = Wire diameter (au*) D = Coil average diameter (arm) = Load loss amount G = Lateral elastic modulus Kgf/1 (8000 Kgf/n'' is adopted) (2) Fatigue limit = Fatigue test Conditions> Test temperature: Room temperature Time life: Cleared 107 times Surface condition: ° Shot peened <Judgment of fatigue limit> Test stress when cleared 107 times n=2 Based on this Table 2, the fatigue resistance according to the present invention It can be seen that copper for springs, which has excellent strength and fatigue resistance, is superior to comparative steel.
［発明の効果］
以上説明したように、本発明に係る耐へたり性と耐疲労
性の優れたばね用銅は上記の構成であるから、高速、高
回転化に耐える高性能であり、さらに、耐へたり性およ
び耐疲労性に優れた効果を有するしのである。[Effects of the Invention] As explained above, since the copper for springs according to the present invention has excellent fatigue resistance and fatigue resistance has the above-described structure, it has high performance that can withstand high speeds and high rotations, and furthermore, Shino has excellent effects on fatigue resistance and fatigue resistance.
Claims (1)
ｗｔ％、Ｍｎ０．４０〜１．５０ｗｔ％、Ｃｒ０．２０
〜１．００ｗｔ％、Ａｌ０．０４〜０．１０ｗｔ％、Ｗ
０．０３〜１．００ｗｔ％、Ｎ０．００２〜０．０１５
ｗｔ％ を含有し、さらに、 Ｍｏ０．０５〜２．００ｗｔ％、Ｖ０．０５〜０．５ｗ
ｔ％の１種または２種 を含有し、残部Ｆｅおよび不可避不純物からなることを
特徴とする耐へたり性と耐疲労性の優れたばね用鋼。[Claims] C0.30-0.80wt%, Si0.50-2.00
wt%, Mn0.40-1.50wt%, Cr0.20
~1.00wt%, Al0.04~0.10wt%, W
0.03-1.00wt%, N0.002-0.015
wt%, and further contains Mo0.05-2.00wt%, V0.05-0.5w
A spring steel with excellent fatigue resistance and fatigue resistance, characterized by containing one or two types of t%, with the balance consisting of Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27502186A JPS63128152A (en) | 1986-11-18 | 1986-11-18 | Spring steel having superior settling fatigue resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27502186A JPS63128152A (en) | 1986-11-18 | 1986-11-18 | Spring steel having superior settling fatigue resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63128152A true JPS63128152A (en) | 1988-05-31 |
Family
ID=17549770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27502186A Pending JPS63128152A (en) | 1986-11-18 | 1986-11-18 | Spring steel having superior settling fatigue resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63128152A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002050327A1 (en) * | 2000-12-20 | 2002-06-27 | Nippon Steel Corporation | High-strength spring steel and spring steel wire |
| WO2002063055A1 (en) * | 2001-02-07 | 2002-08-15 | Nippon Steel Corporation | Heat-treated steel wire for high strength spring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827958A (en) * | 1981-08-11 | 1983-02-18 | Aichi Steel Works Ltd | Spring steel with superior yielding resistance |
| JPS5827959A (en) * | 1981-08-11 | 1983-02-18 | Aichi Steel Works Ltd | Spring steel with superior yielding resistance |
-
1986
- 1986-11-18 JP JP27502186A patent/JPS63128152A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827958A (en) * | 1981-08-11 | 1983-02-18 | Aichi Steel Works Ltd | Spring steel with superior yielding resistance |
| JPS5827959A (en) * | 1981-08-11 | 1983-02-18 | Aichi Steel Works Ltd | Spring steel with superior yielding resistance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002050327A1 (en) * | 2000-12-20 | 2002-06-27 | Nippon Steel Corporation | High-strength spring steel and spring steel wire |
| US7789974B2 (en) | 2000-12-20 | 2010-09-07 | Nippon Steel Corporation | High-strength spring steel wire |
| WO2002063055A1 (en) * | 2001-02-07 | 2002-08-15 | Nippon Steel Corporation | Heat-treated steel wire for high strength spring |
| US7575646B2 (en) | 2001-02-07 | 2009-08-18 | Nippon Steel Corporation | Heat-treated steel wire for high strength spring |
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