JPH0474822A - High strength stainless steel material excellent in spring characteristic and settling resistance - Google Patents
High strength stainless steel material excellent in spring characteristic and settling resistanceInfo
- Publication number
- JPH0474822A JPH0474822A JP18773890A JP18773890A JPH0474822A JP H0474822 A JPH0474822 A JP H0474822A JP 18773890 A JP18773890 A JP 18773890A JP 18773890 A JP18773890 A JP 18773890A JP H0474822 A JPH0474822 A JP H0474822A
- Authority
- JP
- Japan
- Prior art keywords
- less
- stainless steel
- cold working
- steel material
- strength stainless
- 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
- 239000000463 material Substances 0.000 title claims abstract description 17
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 17
- 239000010935 stainless steel Substances 0.000 title claims abstract description 17
- 238000005482 strain hardening Methods 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 229910052748 manganese Inorganic materials 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 229910001566 austenite Inorganic materials 0.000 description 7
- 229910000734 martensite Inorganic materials 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 238000005097 cold rolling Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000003483 aging Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＴＶ． ＯＡ機器、ＶＴＲなどの部品である押
えばね、皿ばねなどに使用される耐食性に優れ、かっば
ね特性と耐へたり性に優れた高強度ステンレス鋼材に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to TV. The present invention relates to high-strength stainless steel materials with excellent corrosion resistance, excellent cover spring properties, and fatigue resistance, which are used in press springs, disc springs, etc., which are parts of office automation equipment, VTRs, etc.
ＴＶ、ＯＡ機器． ＶＴＲなどの部品である押えばね皿
ばねなどには耐食性および優れたばね特性が要求され、
ＳＵＳ３０１系の加工硬化型ステンレス鋼などが使用さ
れている。すなわち、本系鋼では冷間加工により高強度
の加工誘起マルテンサイト相を多量に生成させるととも
にオーステナイト相の加工硬化を利用し高強度化させ、
さらに場合によっては冷間加工後、４００℃付近での時
効処理を施しばね特性を向上させる。TV, OA equipment. Corrosion resistance and excellent spring characteristics are required for pressure springs and disc springs, which are parts of VTRs, etc.
SUS301 series work hardening stainless steel is used. In other words, in this steel, a large amount of high-strength strain-induced martensite phase is generated through cold working, and the strength is increased by utilizing work hardening of the austenite phase.
Furthermore, in some cases, after cold working, aging treatment is performed at around 400° C. to improve spring characteristics.
しかしながら、最近、上述した用途において黒色化処理
として６００℃付近の高温で熱処理される場合が多くな
り、このような温度での熱処理は加工硬化したオーステ
ナイト相を軟化させるとともに加工誘起マルテンサイト
相の消失が生じるため、ＳＵＳ３０１系鋼でばばね特性
や耐へたり性が著しく低下し、使用に耐えなくなるとい
う問題が生し、高温での熱処理を施してもばね特性や耐
へたり性が低下しない新規なステンレス鋼が要望されて
いる。However, recently, in the above-mentioned applications, heat treatment at high temperatures around 600°C has become common as a blackening treatment, and heat treatment at such temperatures softens the work-hardened austenite phase and causes the disappearance of the work-induced martensite phase. As a result, the spring properties and fatigue resistance of SUS301 series steels are significantly reduced, causing the problem that they are no longer usable. There is a demand for stainless steel.
本発明者等はＣｒ−Ｎｉステンレス鋼において６００℃
付近の高温熱処理でもばね特性や酎へたり性が低下しな
い合金組成ならびに冷間加工と熱処理の影響を鋭意研究
したところ、冷間加工を施しても加工誘起マルテンサイ
ト相が生成せず、実質的に７相である鋼に冷間加工後、
５００〜７００℃で熱処理を施すことでひずみ時効硬化
が生し，その結果ばね特性が著しく向上し、かつ５００
〜７００℃の高温域で使用される場合においても耐へた
り性が優れていることを見出だし，本発明に至った。In Cr-Ni stainless steel, the inventors have
After extensive research into the alloy composition, which does not reduce its spring properties and stiffness even after near-high temperature heat treatment, and the effects of cold working and heat treatment, we found that even with cold working, no deformation-induced martensitic phase is generated, and there is no substantial After cold working, the steel has seven phases.
Heat treatment at 500 to 700°C causes strain age hardening, resulting in significantly improved spring properties and
It has been discovered that the sagging resistance is excellent even when used in a high temperature range of ~700°C, leading to the present invention.
本発明は、重量％で
ｃ ： ｏ．ｏａ％以下
Ｓｉ ： ２．０％以下
Ｍｎ ： ２．０〜８．０％
Ｃｒ ： １４．０〜２２．０％以下
Ｎｉ ： １０．０〜２０．０％
Ｎ ： ０．０５〜０．３５％
を含有し、残部Ｆｅおよび不純物からなり、冷間加工を
施しても実質的にγ単相である鋼に５００〜７００゜Ｃ
の温度域で熱処理を施したことを特徴とするばね特性と
耐へたり性に優れた高強度ステンレス鋼材を堤供する。The present invention has a c:o.% by weight. oa% or less Si: 2.0% or less Mn: 2.0-8.0% Cr: 14.0-22.0% or less Ni: 10.0-20.0% N: 0.05-0.35 %, the remainder consists of Fe and impurities, and is essentially a single phase of γ even after cold working at 500-700°C.
We offer high-strength stainless steel materials that have been heat-treated in the temperature range of
本発明はまた、重量％で
ｃ ： ｏ．ｏｇ％以下
Ｓｊ ： ２．０％以下
Ｍｎ ： ２．０−８．０％
Ｃｒ ： １４．０〜２２．０％以下
Ｎｉ ： １０．０〜２０．０％
Ｎ ： ０．０５〜０．３５％
Ｍｏ ： ３．０％以下
■、Ｎｂ． Ｔｉの１種または２種以上をそれぞれ１、
０％以下
を含有し，残部Ｆｅおよび不純物からなり、冷間加工を
施しても実質的にγ単相である鋼に５００〜７００℃の
温度域で熱処理を施したことを特徴とする特許
材を提供する。The present invention also provides c:o.% by weight. og% or less Sj: 2.0% or less Mn: 2.0-8.0% Cr: 14.0-22.0% or less Ni: 10.0-20.0% N: 0.05-0.35 % Mo: 3.0% or less ■, Nb. 1 or more of Ti,
0% or less, the balance consists of Fe and impurities, and is essentially a single-phase γ steel even after cold working, which is heat treated in a temperature range of 500 to 700°C. I will provide a.
本発明はまた，重量％で
Ｃ ： ０．０８％以下
Ｓｉ ： ２．０％以下
Ｍｎ ： ２．０ 〜８．０％
Ｃｒ ： １４．０〜２２．０％以下
Ｎｉ ： １０．０〜２０．０％
Ｎ ： ０．０５〜０．３５％
Ｃａ． ＲＥＭの１種または２種を０．０５％以下を含
有し、残部Ｆｅおよび不純物からなり、冷間加工を施し
ても実質的にγ単相である鋼に５００〜７００℃の温度
域で熱処理を施したことを特徴とするばね特性と耐へた
り性に優れた高強度ステンレス鋼材を提供する。The present invention also provides C: 0.08% or less, Si: 2.0% or less, Mn: 2.0 to 8.0%, Cr: 14.0 to 22.0%, Ni: 10.0 to 20% by weight. .0% N: 0.05-0.35% Ca. Steel containing 0.05% or less of one or two types of REM, with the remainder consisting of Fe and impurities, and which is essentially a single phase of γ even after cold working, is heat treated in a temperature range of 500 to 700°C. To provide high-strength stainless steel material with excellent spring characteristics and fatigue resistance.
本発明はまた、重量％で
Ｃ ： ０．０８％以下
Ｓｉ ： ２．０％以下
Ｍｎ ： ２．Ｏ′−８．０％
Ｃｒ ： １４．０−２２．Ｑ％以下
＼ｉ ： １０．０〜２０．０％
Ｎ ： ０．０５〜０．３５％
呵ｏ ： ３．０％以下
■、〜ｂ． Ｔｉの１種または２種以上をそれぞれ１、
０％以下、さらにＣａ− ＲＥＭの１種または２種を０
．０５％以下
を含有し、残部Ｆｅおよび不純物からなり，冷間加工を
施しても実質的にγ単相である鋼に５００〜７００゜Ｃ
の温度域で熱処理を施したことを特徴とするばね特性と
耐へたり性に優れた高強度ステンレス鋼材を提供する。The present invention also provides C: 0.08% or less, Si: 2.0% or less, Mn: 2.0% by weight. O'-8.0% Cr: 14.0-22. Q% or less＼i: 10.0-20.0% N: 0.05-0.35% 呵o: 3.0% or less■, ~b. 1 or more of Ti,
0% or less, and 0% or less of one or two types of Ca-REM.
．． 500 to 700°C to steel that contains 0.5% or less, the balance consists of Fe and impurities, and is essentially a single phase of γ even after cold working.
The present invention provides a high-strength stainless steel material that has been heat-treated in a temperature range of
ここに実質的にγ単相の用語は加工誘起マルテンサイト
およびδフェライトを合計で１０％まで含有し得ること
を意味する。以下に本発明の構成要件の限定理由につい
て述べる。The term substantially single-phase γ herein means that it may contain up to 10% in total of strain-induced martensite and δ ferrite. The reasons for limiting the constituent elements of the present invention will be described below.
ＣはＮと同様に強力なオーステナイト相安定化元素であ
り、冷間加工後の組織を実質的にγ相とするに有効な元
素である。またＣは冷間加工後５００〜７００℃の温度
域で熱処理を施すことによりばね特性を向上させる有効
な元素でもある。しかし、多量に含有されると耐食性が
低下するため、その上限を０．０８％とする。Like N, C is a strong austenite phase stabilizing element, and is an effective element for making the structure after cold working substantially into the γ phase. Further, C is an effective element for improving spring characteristics by performing heat treatment in a temperature range of 500 to 700° C. after cold working. However, if it is contained in a large amount, corrosion resistance decreases, so the upper limit is set at 0.08%.
Ｓｉは優れたばね特性を得るに有用な元素であるが，そ
の含有量が２．０％以上になると冷間加工後に加工誘起
マルテンサイト相が多量に生成し、その結果５００〜７
００℃の温度域での時効処理によりばね特性ならびに耐
へたり性が低下する。さらに。Si is a useful element for obtaining excellent spring properties, but if its content exceeds 2.0%, a large amount of deformation-induced martensitic phase will be generated after cold working, resulting in
Aging treatment in the temperature range of 00°C reduces spring characteristics and resistance to fatigue. moreover.
Ｓｉは６００℃以上の高温域でのばね特性を著しく低下
させる。これらを考慮し、その上限を２．０％とする。Si significantly reduces the spring properties in a high temperature range of 600° C. or higher. Taking these into consideration, the upper limit is set at 2.0%.
ｌｌＩｎはＮｉと同様オーステナイト相安定化元素であ
り、冷間加工後の組織を実質的にγ相とするのに有用な
元素である。さらに、Ｍｎはばね特性の向上に有効な元
素であるＮの固溶度を高める元素でもある．これらの性
能を発揮するには２．０％以上の含有が必要である。し
かし、多量に含有さわると製鋼時にＭｎヒユームが多量
に生成するなど製造が困難となるため，その上限を８．
０％とする。Like Ni, llIn is an austenite phase stabilizing element, and is an element useful for making the structure after cold working substantially in the γ phase. Furthermore, Mn is also an element that increases the solid solubility of N, which is an effective element for improving spring properties. In order to exhibit these performances, the content must be 2.0% or more. However, if it is contained in a large amount, a large amount of Mn fume will be generated during steel making, making manufacturing difficult, so the upper limit has been set to 8.
Set to 0%.
Ｎｉはオーステナイト系ステンレス鋼の基本成分であり
，オーステナイト相の安定化に寄与する有用な元素であ
る。冷間加工後の組織を実質的にγ相とするためには１
０，０％以上必要である。またＮ１は５００〜７００℃
の温度域での時効処理後の優れたばね特性を得るに有効
でもあるが，多量に含有されてもその効果が飽和するた
め上限を２０．０％とする。Ni is a basic component of austenitic stainless steel and is a useful element that contributes to stabilizing the austenite phase. In order to make the structure after cold working substantially γ phase, 1
0.0% or more is required. Also, N1 is 500 to 700℃
Although it is effective in obtaining excellent spring properties after aging treatment in the temperature range of 20.0%, the upper limit is set at 20.0% because the effect is saturated even if it is contained in a large amount.
Ｃｒはステンレス鋼の基本成分であり，良好な耐食性を
得るには１４．０％以上の含有が必要である。Cr is a basic component of stainless steel, and must be contained in an amount of 14.0% or more to obtain good corrosion resistance.
しかしながら、多量に含有されると多量のδフェライト
が生成し，実質的にγ相の組織を得ることができなくな
るため、その上限を２２，０％とする。However, if it is contained in a large amount, a large amount of δ ferrite will be produced, making it virtually impossible to obtain a γ phase structure, so the upper limit is set at 22.0%.
■はオーステナイト安定化元素であり，冷間加工後の組
織を実質的にγ相とするに有用な元素である。またＮは
本発明の特徴である優れたばね特性と耐へたり性を得る
に必須の元素である。これらの性能を発揮させるために
は０．０５％以上の含有が必要であるが、０．３５％を
超えると，健全な鋼塊が得られなくなるため、これを上
限とする。(2) is an austenite stabilizing element and is an element useful in making the structure after cold working substantially γ phase. Further, N is an essential element to obtain the excellent spring characteristics and fatigue resistance that are the characteristics of the present invention. In order to exhibit these performances, a content of 0.05% or more is required, but if it exceeds 0.35%, a sound steel ingot cannot be obtained, so this is set as the upper limit.
阿０は耐食性の向上に有効に作用するとともに優れたば
ね特性と耐へたり性を得るに有効な元素である。しかし
ながら、多量に含有されるとδフエライト生成量が増加
し、組織を実質的にγ相とすることができなくなるため
、その上限を３．０％とする。A0 is an element that is effective in improving corrosion resistance and in obtaining excellent spring characteristics and fatigue resistance. However, if it is contained in a large amount, the amount of δ ferrite produced will increase and the structure will not be substantially in the γ phase, so the upper limit is set at 3.0%.
Ｖ、Ｎｂ、 Ｔｉはともに冷間加工後５００−７００°
Ｃの温度域で熱処理を施すことによりばね特性と耐へた
り性を向上させるに有効な元素であるが、多量に含有さ
れるとδフエライト生成量が増加し、組織を実質的にγ
相とすることができなくなるため、それぞれ１．０％以
下とする。V, Nb, and Ti are all 500-700° after cold working.
It is an effective element for improving spring properties and fatigue resistance by heat treatment in the temperature range of
Since it becomes impossible to form a phase, each content is set at 1.0% or less.
Ｃａ、 ＲＥＩよ強力な脱酸、脱硫剤として作用し、熱
間加工性を向上させる有用な元素である。しかし、０．
０５％を超えて添加されると、逆に熱間加工性を低下さ
せるとともに、耐食性を低下させるため、これを上限と
する。Ca is a useful element that acts as a stronger deoxidizing and desulfurizing agent than REI and improves hot workability. However, 0.
If added in an amount exceeding 0.5%, the hot workability and corrosion resistance will be reduced, so this is set as the upper limit.
熱処理を５００〜７００℃の温度域で実施するのは本発
明者等の知見に基いているが、その限定の理由は以下の
発明の具体的開示の欄の記載より明らかになるであろう
。It is based on the knowledge of the present inventors that the heat treatment is performed in a temperature range of 500 to 700°C, and the reason for this limitation will become clear from the description in the section of the specific disclosure of the invention below.
以下、図面を参照して、本発明を実施例によって具体的
に説明する。Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.
第１表に示す組成の鋼試料を溶製した。ＡＩは従来鋼５
ＵＳ３０１．８１〜Ｂ９は本発明鋼である。それぞれの
鋼を鋳造、鍛造、熱間圧延により３圃厚とした。Steel samples having the compositions shown in Table 1 were melted. AI is conventional steel 5
US301.81-B9 are the steels of the present invention. Each steel was cast, forged, and hot rolled into three field thicknesses.
ついで溶体化処理後、冷間圧延と焼鈍を繰り返し、仕上
げ板厚： ０．６ｍｍの冷間圧延材とした。最終冷延段
階の圧下率は第２表に示した。これらの冷間圧延材に４
００〜８００℃の温度で３０分間の熱処理を施した後、
ＪＩＳ ）＋３１３０の繰返したわみ試験法に準じてば
ね限界値を測定した。冷間圧延材を幅１０１ｆｆｌ＋。Then, after solution treatment, cold rolling and annealing were repeated to obtain a cold rolled material with a finished plate thickness of 0.6 mm. The rolling reduction in the final cold rolling stage is shown in Table 2. 4 for these cold rolled materials
After heat treatment for 30 minutes at a temperature of 00 to 800°C,
The spring limit value was measured according to the repeated deflection test method of JIS) +3130. Cold rolled material with a width of 101ffl+.
長さ１００ｍｍの試片に加工した後、第１図に示す標線
間隔Ｑ ＝８０ａｎのエツジに載置し、第２図に示す様
に、中央に置いたエツジに荷重を加えてａ＝３膿の変位
を与えた状態で４００〜８００°Ｃの温度で３０分間の
熱処理を施し、空冷後除荷し、へたり量すを測定した。After processing it into a specimen with a length of 100 mm, it was placed on an edge with a gauge line spacing of Q = 80 an as shown in Figure 1, and a load was applied to the edge placed in the center as shown in Figure 2. Heat treatment was performed at a temperature of 400 to 800° C. for 30 minutes while the pus was displaced, and after air cooling, the load was unloaded, and the weight of the pus was measured.
へたり率＝（ｂ／ａ）Ｘ１００（％） と定義する。Settling rate = (b/a) x 100 (%) It is defined as
第２表 ＣＲは冷間圧延を意味する。Table 2 CR means cold rolled.
ＢＩＯの鋼の最終冷延圧下率５０％の試料について４０
０〜８００℃の温度で熱処理した後のへたり率とばね限
界値を第４図に示す。この図から明らかなように、５０
０〜７００℃の範囲で熱処理したものはへたり率もばね
限界値も優れていることがわかる。40 for a sample of BIO steel with a final cold rolling reduction of 50%
Fig. 4 shows the set-off rate and spring limit value after heat treatment at a temperature of 0 to 800°C. As is clear from this figure, 50
It can be seen that those heat-treated in the range of 0 to 700°C are excellent in both the setting rate and the spring limit value.
他の試料の試験結果も第２表に示しである。この表から
れかるように従来鋼ＡＩでは、６０％の冷間圧延後に４
００℃の熱処理を施すと、ばね限界値は８１ｋｇ／ｗ１
２と高いが、６００°Ｃの熱処理を施すと、ばね限界値
は４２ ｋｇ ／ ｍｍ ”まで低下する。一方、へた
り率も４００℃の熱処理を施した場合に比へ６００°Ｃ
の熱処理を施した場合の方が大きいことがわかる。Test results for other samples are also shown in Table 2. As can be seen from this table, in conventional steel AI, after 60% cold rolling,
When heat treated at 00℃, the spring limit value is 81kg/w1
2, but when heat treated at 600°C, the spring limit value decreases to 42 kg/mm''.On the other hand, when heat treated at 400°C, the rate of fatigue also decreases to 600°C.
It can be seen that it is larger when heat treatment is applied.
これに対し、本発明鋼である８１〜Ｂ５では、オーステ
ナイト安定化元素のＮｉ、 ＭｎおよびＮを多く含有し
、高温の熱処理後でも優れたばね特性と耐へたり性を示
す。８６〜１１はＭＯｌＶ、ＮｂおよびＴｉを適量含有
しているもので、冷間加工と熱処理を付与した後のばね
特性と耐へたり性は、これらの元素を含有しない鋼に比
入でさらに上昇している。On the other hand, steels 81 to B5 according to the present invention contain large amounts of austenite stabilizing elements such as Ni, Mn, and N, and exhibit excellent spring characteristics and resistance to settling even after high-temperature heat treatment. 86 to 11 contain appropriate amounts of MOLV, Nb, and Ti, and after cold working and heat treatment, the spring properties and fatigue resistance are further improved compared to steels that do not contain these elements. are doing.
なお、第２表中の本邸は、供試材が本発明鋼であるが熱
処理温度が本発明範囲を外れるものであり、４００℃の
熱処理を施すとばね限界値が十分とはいえず、また８０
０℃の熱処理でばばね限界値が低く、かつ耐へたり性も
大きくなることがわかる。In addition, for Hontei in Table 2, the test material is the steel of the present invention, but the heat treatment temperature is outside the range of the present invention, and the spring limit value is not sufficient when heat treated at 400 ° C. 80
It can be seen that heat treatment at 0°C lowers the spring limit value and increases the resistance to fatigue.
〔発明の効果〕
本発明は冷間加工を施しても実質的にγ重相である鋼に
、５００〜７００°Ｃの温度域で熱処理を施すことを特
徴とする特許
強度ステンレス鋼材を提供するものであり、その工業的
価値は大きい。[Effects of the Invention] The present invention provides a patented strength stainless steel material, which is characterized by subjecting steel, which is substantially in the γ heavy phase even after cold working, to heat treatment in a temperature range of 500 to 700°C. It has great industrial value.
第１〜３図はへたり率測定の方法を図解する概念図であ
り，第４図は本発明鋼材の１試料と既知鋼試料の熱処理
温度とへたり率およびばね限界率の関係を示すグラフで
ある。Figures 1 to 3 are conceptual diagrams illustrating the method of measuring the sag rate, and Figure 4 is a graph showing the relationship between the heat treatment temperature, the sag rate, and the spring limit rate for one sample of the steel material of the present invention and a known steel sample. It is.
Claims (1)
施しても実質的にγ単相である鋼に５００〜７００℃の
温度域で熱処理を施したことを特徴とするばね特性と耐
へたり性に優れた高強度ステンレス鋼材。 ２）重量％で Ｃ：０．０８％以下 Ｓｉ：２．０％以下 Ｍｎ：２．０〜８．０％ Ｃｒ：１４．０〜２２．０％以下 Ｎｉ：１０．０〜２０．０％ Ｎ：０．０５〜０．３５％ Ｍｏ：３．０％以下 Ｖ、Ｎｂ、Ｔｉの１種または２種以上をそれぞれ１．０
％以下 を含有し、残部Ｆｅおよび不純物からなり、冷間加工を
施しても実質的にγ単相である鋼に５００〜７００℃の
温度域で熱処理を施したことを特徴とするばね特性と耐
へたり性に優れた高強度ステンレス鋼材。 ３）重量％で Ｃ：０．０８％以下 Ｓｉ：２．０％以下 Ｍｎ：２．０〜８．０％ Ｃｒ：１４．０〜２２．０％以下 Ｎｉ：１０．０〜２０．０％ Ｎ：０．０５〜０．３５％ Ｃａ、ＲＥＭの１種または２種を０．０５％以下を含有
し、残部Ｆｅおよび不純物からなり、冷間加工を施して
も実質的にγ単相である鋼に５００〜７００℃の温度域
で熱処理を施したことを特徴とするばね特性と耐へたり
性に優れた高強度ステンレス鋼材。 ４）重量％で Ｃ：０．０８％以下 Ｓｉ：２．０％以下 Ｍｎ：２．０〜８．０％ Ｃｒ：１４．０〜２２．０％以下 Ｎｉ：１０．０〜２０．０％ Ｎ：０．０５〜０．３５％ Ｍｏ：３．０％以下 Ｖ、Ｎｂ、Ｔｉの１種または２種以上を、それぞれ１．
０％以下、Ｃａ、ＲＥＭの１種または２種を０．０５％
以下 を含有し、残部Ｆｅおよび不純物からなり、冷間加工を
施しても実質的にγ単相である鋼に５００〜７００℃の
温度域で熱処理を施したことを特徴とするばね特性と耐
へたり性に優れた高強度ステンレス鋼材。[Claims] 1) C: 0.08% or less Si: 2.0% or less Mn: 2.0 to 8.0% Cr: 14.0 to 22.0% Ni: 10. Steel containing 0 to 20.0% N: 0.05 to 0.35%, the balance consisting of Fe and impurities, and which is essentially a single phase of γ even after cold working is heated at a temperature of 500 to 700 °C. A high-strength stainless steel material with excellent spring characteristics and fatigue resistance, which has been heat-treated in a high temperature range. 2) C: 0.08% or less Si: 2.0% or less Mn: 2.0 to 8.0% Cr: 14.0 to 22.0% Ni: 10.0 to 20.0% by weight N: 0.05-0.35% Mo: 3.0% or less V, Nb, Ti or more at 1.0% each
% or less, the remainder consists of Fe and impurities, and is essentially a single phase of γ even after cold working, and is heat treated in a temperature range of 500 to 700°C. High strength stainless steel material with excellent wear resistance. 3) In weight%, C: 0.08% or less Si: 2.0% or less Mn: 2.0 to 8.0% Cr: 14.0 to 22.0% or less Ni: 10.0 to 20.0% N: 0.05 to 0.35% Contains 0.05% or less of one or two of Ca and REM, with the balance consisting of Fe and impurities, and remains essentially a single phase of γ even after cold working. A high-strength stainless steel material with excellent spring characteristics and fatigue resistance, which is made by subjecting a certain steel to heat treatment in a temperature range of 500 to 700°C. 4) C: 0.08% or less Si: 2.0% or less Mn: 2.0 to 8.0% Cr: 14.0 to 22.0% Ni: 10.0 to 20.0% by weight N: 0.05 to 0.35% Mo: 3.0% or less One or more of V, Nb, and Ti, each containing 1.
0% or less, 0.05% of one or both of Ca and REM
The spring characteristics and durability are characterized by heat treatment in the temperature range of 500 to 700°C on steel that contains the following, the balance is Fe and impurities, and is essentially a single phase of γ even after cold working. High-strength stainless steel material with excellent settability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18773890A JPH0474822A (en) | 1990-07-16 | 1990-07-16 | High strength stainless steel material excellent in spring characteristic and settling resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18773890A JPH0474822A (en) | 1990-07-16 | 1990-07-16 | High strength stainless steel material excellent in spring characteristic and settling resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0474822A true JPH0474822A (en) | 1992-03-10 |
Family
ID=16211331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18773890A Pending JPH0474822A (en) | 1990-07-16 | 1990-07-16 | High strength stainless steel material excellent in spring characteristic and settling resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0474822A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009084597A (en) * | 2007-09-27 | 2009-04-23 | Nippon Seisen Co Ltd | Stainless steel wire for hydrogen resistant spring and hydrogen resistant spring product using the same |
| JP2012211348A (en) * | 2011-03-18 | 2012-11-01 | Sumitomo Metal Ind Ltd | Cold-rolled stainless steel sheet excellent in high temperature settling resistance, and manufacturing method therefor |
-
1990
- 1990-07-16 JP JP18773890A patent/JPH0474822A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009084597A (en) * | 2007-09-27 | 2009-04-23 | Nippon Seisen Co Ltd | Stainless steel wire for hydrogen resistant spring and hydrogen resistant spring product using the same |
| JP2012211348A (en) * | 2011-03-18 | 2012-11-01 | Sumitomo Metal Ind Ltd | Cold-rolled stainless steel sheet excellent in high temperature settling resistance, and manufacturing method therefor |
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