JP2944865B2 - Stainless steel for high strength cold working - Google Patents
Stainless steel for high strength cold workingInfo
- Publication number
- JP2944865B2 JP2944865B2 JP23877993A JP23877993A JP2944865B2 JP 2944865 B2 JP2944865 B2 JP 2944865B2 JP 23877993 A JP23877993 A JP 23877993A JP 23877993 A JP23877993 A JP 23877993A JP 2944865 B2 JP2944865 B2 JP 2944865B2
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- Prior art keywords
- cold
- present
- cold working
- stainless steel
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Description
【0001】[0001]
【産業上の利用分野】本発明は、各種機械部品や建設用
などの締結部品、磁性材とのカップリング材として用い
られ、特に非磁性、高強度を求められる分野において使
用される部材を製造するために使用される棒材、線材お
よび鋼管材用の冷間加工性に優れた高強度非磁性含窒素
オーステナイト系ステンレス鋼に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for manufacturing various mechanical parts, fastening parts for construction, etc., and coupling materials with magnetic materials, and particularly for manufacturing members used in fields requiring non-magnetic and high strength. The present invention relates to a high-strength non-magnetic nitrogen-containing austenitic stainless steel excellent in cold workability for a rod, a wire, and a steel pipe used for forming the same.
【0002】[0002]
【従来の技術】一般にオーステナイト系ステンレス鋼
は、耐食性、耐熱性に優れているため、各方面で多様に
用いられている。例えば、家庭電化製品、事務用機器、
産業機械の部品やネジ、ボルト、ナット、ピンなどの締
結品および住宅、ビル、鉄道などの構造物の建設用部品
や締結品などに使用されている。これらの部品や締結品
は素材を冷間鍛造や冷間引抜法で成形加工して製造され
るのものが殆どである。これらの冷間鍛造や冷間引抜法
で成形加工して製造する方法は、加工能率が高く、ま
た、歩留りも高い利点を有する。2. Description of the Related Art Generally, austenitic stainless steels are used in various fields because of their excellent corrosion resistance and heat resistance. For example, home appliances, office equipment,
It is used for parts of industrial machines, fasteners such as screws, bolts, nuts and pins, and construction parts and fasteners for structures such as houses, buildings and railways. Most of these parts and fasteners are manufactured by forming a material by cold forging or cold drawing. These methods of forming and manufacturing by cold forging or cold drawing have advantages of high working efficiency and high yield.
【0003】しかし、一般のオーステナイト系ステンレ
ス鋼は、普通鋼やフェライト系ステンレス鋼と比べて変
形抵抗が大きく、また、冷間加工硬化性も高いので、冷
間鍛造や冷間引抜法で上記のような部品を製造するのは
困難であった。また、冷間加工中に加工によるマルテン
サイト相が発生するため非磁性(透磁率1.02以下)
とならず、このために磁性材とのカップリング(連結
部)に使用する場合に問題となることがあった。However, general austenitic stainless steels have higher deformation resistance and higher cold work hardening properties than ordinary steels and ferritic stainless steels, and thus are subjected to the above-mentioned cold forging or cold drawing. It was difficult to manufacture such parts. In addition, since a martensite phase is generated during cold working, the material is non-magnetic (permeability is 1.02 or less).
For this reason, there is a case where a problem arises when using it for coupling (connection part) with a magnetic material.
【0004】これらの問題点を解消する材料、即ち冷間
加工性、耐食性に優れ且つ非磁性の材料としてSUSX
M7、SUS305がJISに規定されているが、冷間
加工後においても上記のような部品においては強度不足
になる場合が多い。[0004] As a material which solves these problems, ie, a material which is excellent in cold workability and corrosion resistance and is non-magnetic, SUSX is used.
M7 and SUS305 are stipulated in JIS, but the strength of such parts often becomes insufficient even after cold working.
【0005】[0005]
【発明が解決しようとする課題】最近、各種の機械部品
や建設用部品において、軽量化および信頼性向上のため
高強度を有する部品が要求されている。また、これらの
部品の中にはは磁性材とのカップリングに使用されるも
のも多く、従って、冷間加工性に優れた高強度非磁性オ
ーステナイト系ステンレス鋼の要求が高まっている。Recently, various types of mechanical parts and construction parts have been required to have high strength in order to reduce weight and improve reliability. In addition, many of these parts are used for coupling with a magnetic material, and therefore, a demand for a high-strength non-magnetic austenitic stainless steel excellent in cold workability is increasing.
【0006】この目的のための、強度が高く且つ非磁性
の材料としては、現在高Mn含窒素オーステナイト系ス
テンレス鋼、例えば0.1C-15Mn-18Cr-0.4N 鋼が開発され
ているが、実際には、冷間加工前の硬さが非常に高く、
延性が乏しいため冷間加工時に割れが多発し歩留りが悪
く問題となっている。As a high-strength and non-magnetic material for this purpose, a high-Mn nitrogen-containing austenitic stainless steel, for example, 0.1C-15Mn-18Cr-0.4N steel has been developed. Has a very high hardness before cold working,
Due to poor ductility, cracks occur frequently during cold working, and the yield is poor, which is a problem.
【0007】この発明が解決しようとする課題は、これ
まで得られていなかった、冷間加工性に優れ、冷間加工
後の部品、締結品などにおいて高強度かつ非磁性である
含窒素オーステナイト系ステンレス鋼を提供することで
ある。The problem to be solved by the present invention is a nitrogen-containing austenitic system which has not been obtained so far and which is excellent in cold workability and has high strength and non-magnetic properties in cold worked parts and fasteners. Is to provide stainless steel.
【0008】[0008]
【課題を解決するための手段】前記課題を解決するため
の手段は、1.化学成分が重量%で、C:0.12%以
下、Si:0.05〜1.00%、Mn:5.0〜8.
5%、P:0.045%以下、S:0.015%以下、
Ni:4.0〜9.0%、Cr:16.0〜21.0
%、Cu:1.0%超〜4.0%、N:0.15〜0.
30%、O:0.0040%以下、B:0.0015〜
0.0040%を含有し、さらにC+N:0.20〜
0.35%の関係を有し、残部がFeおよび不可避不純
物からなり、かつ、条件式:530-410C-350N-10Mn-15Cr-
30(Ni+Cu)-10Mo≦-80 を満足するオーステナイト系ステ
ンレス鋼である。In order to solve the problems] order to solve the above problems
It is the means, 1. Chemical components in weight%, C: 0.12% or less, Si: 0.05-1.00%, Mn: 5.0-8.
5%, P: 0.045% or less, S: 0.015% or less,
Ni: 4.0 to 9.0%, Cr: 16.0 to 21.0
%, Cu: more than 1.0% to 4.0%, N: 0.15 to 0.1%.
30%, O: 0.0040% or less, B: 0.0015 to
0.0040%, and C + N: 0.20
0.35%, the balance being Fe and unavoidable impurities, and conditional expression: 530-410C-350N-10Mn-15Cr-
It is an austenitic stainless steel satisfying 30 (Ni + Cu) -10Mo ≦ -80.
【0009】2.さらに、上記化学成分に追加して、 Nb:0.05〜0.20%もしくはV:0.05〜
0.50%の1種または2種を含有し、かつ、 条件式:530-410C-350N-10Mn-15Cr-30(Ni+Cu)-10Mo≦-8
0 を満足するオーステナイト系ステンレス鋼である。[0009] 2. Further, in addition to the above chemical components, Nb: 0.05 to 0.20% or V: 0.05 to
Contains 0.50% of one or two kinds, and conditional expression: 530-410C-350N-10Mn-15Cr-30 (Ni + Cu) -10Mo ≦ -8
This is an austenitic stainless steel satisfying 0.
【0010】[0010]
【作用】次に本発明鋼の化学成分の限定理由を説明す
る。Next, the reasons for limiting the chemical components of the steel of the present invention will be described.
【0011】Cは、オーステナイト系ステンレス鋼の強
度を上昇させる。しかし、本発明においては、強度の点
はNで代替できるので必ずしも必要ではなく、過剰に存
在するとCr炭化物の粒界析出により耐食性が劣化する
ため、上限を0.12%とした。C increases the strength of austenitic stainless steel. However, in the present invention, the strength point is not necessarily required because it can be replaced by N. If it is present excessively, the corrosion resistance is degraded due to grain boundary precipitation of Cr carbide. Therefore, the upper limit is set to 0.12%.
【0012】Siは、脱酸剤として有用な元素である
が、強力なフェライト形成元素のため透磁率を上昇させ
るので、上限を1.00%とした。また、脱酸剤の効果
は、0.05%未満では得られないので、下限を0.0
5%とした。Although Si is a useful element as a deoxidizing agent, its upper limit is set to 1.00% because it is a strong ferrite-forming element and increases the magnetic permeability. Further, since the effect of the deoxidizing agent cannot be obtained at less than 0.05%, the lower limit is set to 0.0%.
5%.
【0013】Mnは、脱酸剤およびオーステナイト形成
元素として非常に有効であり、冷間加工時のマルテンサ
イト相の生成を抑制する高価なNiの代替となり得る元
素である。また、Nのオーステナイト相への溶解度を増
加させるため耐食性を阻害するCr窒化物の生成をも妨
げる。5.0%未満では、これらの効果は小さいため、
下限を5.0%とした。また、8.5%を超えると固溶
Mnによる耐食性の劣化と冷間および熱間加工性の劣化
を招くので、上限を8.5%とした。Mn is a very effective element as a deoxidizing agent and an austenite-forming element, and is an element that can substitute for expensive Ni that suppresses the formation of a martensite phase during cold working. In addition, it increases the solubility of N in the austenite phase, thereby hindering the formation of Cr nitride, which inhibits corrosion resistance. At less than 5.0%, these effects are small,
The lower limit was 5.0%. On the other hand, if the content exceeds 8.5%, deterioration of corrosion resistance and deterioration of cold workability and hot workability due to solid solution Mn are caused. Therefore, the upper limit is set to 8.5%.
【0014】Pは、0.045%を超えて存在すると、
熱間加工性および耐食性が劣化するため、上限を0.0
45%とした。When P is present in excess of 0.045%,
Since the hot workability and corrosion resistance deteriorate, the upper limit is set to 0.0
45%.
【0015】Sは、Mnと結合してMnSを形成し、
0.015%を超えて含有すると冷間加工時の割れ発生
を助長するので、上限を0.015%とした。S combines with Mn to form MnS,
When the content exceeds 0.015%, crack generation during cold working is promoted, so the upper limit is made 0.015%.
【0016】Niは、オーステナイト系ステンレス鋼に
おける基本元素であり、強力なオーステナイト形成元素
であり、耐候性向上および冷間加工後のマルテンサイト
発生を抑制する元素である。しかし、Niは高価である
ため、これらの性能が確保できる範囲でMn、Cu、N
等で代替し極力低減させることが望ましい。4%未満で
は性能確保が困難であり、9.0%を超えて添加しても
当該部品の用途で重要視される耐候性向上の効果は殆ど
ないことから、4.0〜9.0%とした。Ni is a basic element in austenitic stainless steel, is a strong austenite-forming element, and is an element that improves weather resistance and suppresses the generation of martensite after cold working. However, since Ni is expensive, Mn, Cu, N
It is desirable to substitute as much as possible and reduce as much as possible. If it is less than 4%, it is difficult to ensure the performance, and if it exceeds 9.0%, there is almost no effect of improving the weather resistance, which is regarded as important in the use of the part, so that it is 4.0 to 9.0%. And
【0017】Crは、Niと共にオーステナイト系ステ
ンレス鋼における基本元素であり、耐食性を与える。1
6.0%以上で十分な耐食性が得られるが、21.0%
を超えるとフェライト相が発生しやすくなるため16.
0〜21.0%とした。Cr, together with Ni, is a basic element in austenitic stainless steel and provides corrosion resistance. 1
Sufficient corrosion resistance is obtained at 6.0% or more, but 21.0%
If it exceeds 1, a ferrite phase is likely to be generated.
0 to 21.0%.
【0018】Cuは、オーステナイト形成元素であり、
オーステナイト相を安定化させる。また、Niと同様に
加工によるマルテンサイト相の生成を抑制する。特にC
uはマトリックスの加工硬化指数を下げるため冷間加工
時の延性を維持させることができるので、割れの発生を
抑制する効果がある。その効果を発揮させるには、1.
0%を超えて含有する必要であるので、下限を1.0%
超〜とした。しかし、4.0%を超えて含有させると熱
間加工性を著しく劣化させるため、上限を4.0%とし
た。Cu is an austenite forming element,
Stabilizes the austenitic phase. Further, similarly to Ni, the formation of a martensite phase due to processing is suppressed. Especially C
Since u can lower the work hardening index of the matrix and maintain the ductility during cold working, it has the effect of suppressing the occurrence of cracks. To achieve the effect,
Since it is necessary to contain more than 0%, the lower limit is 1.0%
It was super . However, if the content exceeds 4.0%, the hot workability is significantly deteriorated, so the upper limit is set to 4.0%.
【0019】Nは、Cと同様強力なオーステナイト形成
元素であり、その量を増加させるとNiの節約に寄与す
る。また、マトリックスの強度を上昇させる。本発明鋼
においては、0.15%以上の添加でその効果が顕著に
現れるので、下限を0.15%とした。また、0.30
%を超えて添加すると、冷間加工変形抵抗値が急激に高
くなり、冷間加工性が損なわれるため、上限を0.30
%とした。N is a strong austenite-forming element like C, and increasing its amount contributes to saving Ni. It also increases the strength of the matrix. In the steel of the present invention, since the effect is remarkably exhibited at 0.15% or more, the lower limit is set to 0.15%. Also, 0.30
%, The cold work deformation resistance value sharply increases and the cold workability is impaired.
%.
【0020】鋼中のOは、酸化物として存在し、この量
が多いと冷間加工時の割れの起点になる。本発明におい
てはO量が0.0040%を超えると、冷間加工性の低
下が顕著になる。よって、上限を0.0040%とし
た。O in steel exists as an oxide, and when this amount is large, it becomes a starting point of cracking during cold working. In the present invention, when the O content exceeds 0.0040%, the cold workability is significantly reduced. Therefore, the upper limit is set to 0.0040%.
【0021】Bは、熱間加工性を向上させる元素である
が、0.0015%未満ではその効果は小さいので、下
限を0.0015%とした。また、0.0040%を超
えるとB化合物が生成し、逆に熱間加工性を悪化させる
ので、上限を0.0040%とした。B is an element that improves hot workability, but its effect is small if it is less than 0.0015%, so the lower limit is made 0.0015%. On the other hand, if the content exceeds 0.0040%, a B compound is generated, and conversely, the hot workability deteriorates. Therefore, the upper limit is made 0.0040%.
【0022】Nbは、これを含有させて析出硬化熱処理
を施すと炭窒化物が形成され、結晶粒が微細化し、冷間
加工後の延性が上昇する。本発明において、特に冷間加
工後の延性が必要な場合にはこれを添加する。その場
合、0.05%未満ではその効果は得られないので、下
限を0.05%とした。また、0.20%を超えて含有
すると冷間加工性を損なうので、上限を0.20%とし
た。When Nb is contained and subjected to a precipitation hardening heat treatment, carbonitrides are formed, crystal grains are refined, and ductility after cold working is increased. In the present invention, particularly when ductility after cold working is required, it is added. In this case, the effect cannot be obtained if the content is less than 0.05%, so the lower limit is set to 0.05%. Further, if the content exceeds 0.20%, the cold workability is impaired, so the upper limit was made 0.20%.
【0023】Vは、Nbと同様にこれを含有した場合に
析出硬化熱処理を施すと炭窒化物が形成され、同様の効
果を与える。0.05%未満ではその効果が得られない
ので、下限を0.05%とした。また、0.50%を超
えて含有すると冷間加工性を劣化させるので、上限を
0.50%とした。V, like Nb, contains a carbonitride when subjected to a precipitation hardening heat treatment when containing Vb, and has the same effect. Since the effect cannot be obtained if the content is less than 0.05%, the lower limit is set to 0.05%. Further, if the content exceeds 0.50%, the cold workability is deteriorated, so the upper limit is set to 0.50%.
【0024】C+Nについて:CとNは共に固溶強化型
元素として高強度を得るために必要であるが、その合計
量が0.20%未満では、各種機械部品や建設用等の締
結部品あるいは磁性材とのカップリング材などの当該部
品に使用するには強度不足になる場合が多いので、下限
を0.20%とした。しかし、0.35%を超えると耐
食性や冷間加工性を損なうので、上限を0.35%とし
た。Regarding C + N: Both C and N are necessary to obtain high strength as a solid solution strengthening element, but if the total amount is less than 0.20%, various mechanical parts, fastening parts for construction or the like, or In many cases, the strength is insufficient when used for the parts such as a coupling material with a magnetic material, so the lower limit is set to 0.20%. However, if it exceeds 0.35%, corrosion resistance and cold workability are impaired, so the upper limit was made 0.35%.
【0025】条件式:530-410C-350N-10Mn-15Cr-30(Ni+
Cu)-10Moは、マルテンサイトが生成する温度に関係する
ものであり、条件式の値と50%冷間加工後の透磁率と
の関係を示す図1から、条件式は冷間加工後の透磁率を
予測でき得るものであることが判る。各種機械部品や建
設用等の締結部品あるいは磁性材とのカップリング材な
どの部品は、通常40%以上の冷間加工率が付加される
ため、非磁性を確保するためには条件式において適正な
成分バランスを設定する必要がある。条件式の値が−8
0を超えると透磁率が1.02を超え非磁性が保てない
ため、上限を−80とした。Conditional expression: 530-410C-350N-10Mn-15Cr-30 (Ni +
Cu) -10Mo is related to the temperature at which martensite is formed, and FIG. 1 shows the relationship between the value of the conditional expression and the magnetic permeability after 50% cold working. It can be seen that the magnetic permeability can be predicted. Parts such as various mechanical parts, fastening parts for construction, and coupling materials with magnetic materials are usually added with a cold working rate of 40% or more. It is necessary to set a proper component balance. Conditional expression value is -8
If it exceeds 0, the magnetic permeability exceeds 1.02 and non-magnetic properties cannot be maintained, so the upper limit was set to -80.
【0026】[0026]
【実施例】表1に示す化学成分と条件式の値を有し、残
部がFeおよび不可避不純物である鋼を溶製した。これ
らの鋼の熱間加工性および冷間加工性、並びに冷間加工
後の機械的性質および透磁率について表2に示す。N
o.1〜No.7は本発明の実施例、No.8〜No.
17は比較例である。またNo.18〜21は従来例で
ある。No.1〜No.7の本発明の全ての鋼は熱間加
工性は良好で、かつ、限界圧縮率は80%以上、50%
圧縮後の硬さ(HV)は420以上、50%圧縮後の透磁率
(μ)は非磁性の指標である1.02以下を大幅に下回
る低い値の1.009以下で非磁性、50%圧縮時の変
形抵抗値(MPa) は1200〜1310であり、これらか
ら本発明鋼の全てが熱間加工性および冷間加工性に優
れ、かつ、非磁性であることが判る。EXAMPLES Steel having the chemical components and the values of the conditional expressions shown in Table 1 and the balance being Fe and inevitable impurities was produced. Table 2 shows hot workability and cold workability of these steels, and mechanical properties and magnetic permeability after cold work. N
o. 1 to No. No. 7 is an embodiment of the present invention. 8 to No.
17 is a comparative example. No. Reference numerals 18 to 21 are conventional examples. No. 1 to No. 7, all of the steels of the present invention have good hot workability and a critical compression ratio of 80% or more and 50% or more.
The hardness (HV) after compression is 420 or more, and the magnetic permeability (μ) after 50% compression is nonmagnetic at a low value of 1.009 or less, which is significantly lower than the nonmagnetic index of 1.02 or less. The deformation resistance value (MPa) during compression is 1200 to 1310, which indicates that all of the steels of the present invention have excellent hot workability and cold workability and are non-magnetic.
【0027】ところで、表1において、比較例のNo.
8はC含有量が本発明の規定値より高く、比較例のN
o.9はN含有量が本発明の規定値より高く、したがっ
て両者はC+Nの値が本発明の規定値より高い場合のも
のであり、表2からこれらは冷間加工後の透磁率を下
げ、硬さを上昇させ、限界圧縮率を低下していることが
判る。By the way, in Table 1, no.
No. 8 has a C content higher than the specified value of the present invention, and
o. No. 9 is a case where the N content is higher than the specified value of the present invention, and therefore, both are cases where the value of C + N is higher than the specified value of the present invention. From Table 2, these lower the magnetic permeability after cold working, It can be seen that the maximum compression ratio was lowered and the limit compression ratio was lowered.
【0028】比較例のNo.13はO含有量が本発明の
規定値より高い場合で、限界圧縮率が著しく低下してい
ることが判る。No. of Comparative Example No. 13 indicates that the O content was higher than the specified value of the present invention, and it can be seen that the critical compression ratio was significantly reduced.
【0029】本発明の実施例であるNo.5は本発明の
規定値内の適量のNbを含有し、本発明の実施例である
No.6は本発明の規定値内の適量のVを含有している
ので、これらは限界圧縮率は低下することなく冷間加工
後の強度は上昇するが、比較鋼のNo.17のようにN
b含有量が本発明の規定値を超えると限界圧縮率が低下
することが判る。In the embodiment of the present invention, No. No. 5 contains an appropriate amount of Nb within the specified value of the present invention, and No. 5 is an example of the present invention. No. 6 contained an appropriate amount of V within the specified value of the present invention, so that the strength after cold working increased without lowering the critical compressibility, but the comparative steel No. 6 did not. N like 17
It can be seen that when the b content exceeds the specified value of the present invention, the critical compression ratio decreases.
【0030】[0030]
【表1】 [Table 1]
【0031】[0031]
【表2】 [Table 2]
【0032】また、表1より従来例のNo.18(SU
SXM7相当)とNo.19(SUS305相当)は
(C+N)の含有量が本発明の規定値より低い。表2か
らこれらは冷間加工後の硬さが本発明より低いことが判
る。従来例のNo.20(SUS304J3相当)は、
Mn含有量が本発明の規定値より低い場合で、表2から
冷間加工後の透磁率が本発明より高いことが判る。従来
例のNo.21(SUS304相当)は、Cu含有量が
本発明より低い場合で、表2から本発明より限界圧縮率
が低く、且つ透磁率及び変形抵抗値が高いことが判る。Also, from Table 1, No. 1 of the conventional example is shown. 18 (SU
SXM7) and No. 19 (SUS305 equivalent) has a (C + N) content lower than the specified value of the present invention. From Table 2, it can be seen that the hardness after cold working is lower than that of the present invention. No. of the conventional example. 20 (SUS304J3 equivalent)
Table 2 shows that when the Mn content is lower than the specified value of the present invention, the magnetic permeability after cold working is higher than that of the present invention. No. of the conventional example. 21 (corresponding to SUS304) has a lower Cu content than that of the present invention. From Table 2, it can be seen that the critical compression ratio is lower than that of the present invention, and the magnetic permeability and the deformation resistance value are higher.
【0033】[0033]
【発明の効果】以上説明したとおり、従来のオーステナ
イトステンレス鋼に比して、本発明のオーステナイトス
テンレス鋼は限界圧縮率が80%以上と極めて高く、高
強度で、従って冷間加工において割れの発生率が低く、
かつ冷間加工硬化性も低く、かつ圧縮時の変形抵抗値も
低く、従って、加工能率や歩留りの高い冷間鍛造や冷間
引抜法が適用でき、ネジ、ボルト、ナット、ピン等の締
結部品や各種機械部品や建設用等の部品が効率よく製造
できる。さらに、本発明の鋼は、40%以上の冷間加工
率を付加しても冷間加工後の透磁率は極めて低く非磁性
であるので、磁性材とのカップリング材として使用して
もなんらの問題も生じない極めて優れたオーステナイト
系ステンレス鋼である。As described above, the austenitic stainless steel of the present invention has an extremely high critical compression ratio of 80% or more, is high in strength, and therefore has cracks in cold working, as compared with the conventional austenitic stainless steel. Rate is low,
It also has low cold work hardening properties and low deformation resistance during compression, so it can be applied to cold forging and cold drawing methods with high working efficiency and yield, and fastening parts such as screws, bolts, nuts and pins And various machine parts and construction parts can be manufactured efficiently. Further, the steel of the present invention has a very low magnetic permeability after cold working even if a cold working rate of 40% or more is added, and is therefore non-magnetic, so that it can be used as a coupling material with a magnetic material. This is an extremely excellent austenitic stainless steel that does not cause the problem described above.
【図1】本発明の条件式の計算値と50%冷間加工後の
透磁率との関係を示すグラフである。FIG. 1 is a graph showing a relationship between a calculated value of a conditional expression of the present invention and a magnetic permeability after 50% cold working.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 源隆 兵庫県姫路市飾磨区中島字一文字3007番 地 山陽特殊製鋼株式会社内 (56)参考文献 特開 昭63−169362(JP,A) 特開 昭59−35362(JP,A) 特開 平4−272158(JP,A) 特公 平2−50980(JP,B2) 特公 昭59−29106(JP,B2) 特公 昭60−427(JP,B2) (58)調査した分野(Int.Cl.6,DB名) C22C 38/00 - 38/60 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gentaka Abe 3007, Nakajima character, Shima, Himeji City, Hyogo Prefecture Inside Sanyo Special Steel Co., Ltd. (56) References JP-A-63-169362 (JP, A) JP-A-59-35362 (JP, A) JP-A-4-272158 (JP, A) JP-B-2-50980 (JP, B2) JP-B-59-29106 (JP, B2) JP-B-60-427 (JP, B2) JP, B2) (58) Field surveyed (Int. Cl. 6 , DB name) C22C 38/00-38/60
Claims (2)
下、Si:0.05〜1.00%、Mn:5.0〜8.
5%、P:0.045%以下、S:0.015%以下、
Ni:4.0〜9.0%、Cr:16.0〜21.0
%、Cu:1.0 超〜4.0%、N:0.15〜0.
30%、O:0.0040%以下、 B:0.0015〜0.0040%を含有し、さらにC
+N:0.20〜0.35%の関係を有し、残部がFe
および不可避不純物からなり、かつ、条件式:530-410C
-350N-10Mn-15Cr-30(Ni+Cu)-10Mo≦-80 を満足するオー
ステナイト系ステンレス鋼。1. A chemical component in weight%, C: 0.12% or less, Si: 0.05 to 1.00%, Mn: 5.0 to 8.0.
5%, P: 0.045% or less, S: 0.015% or less,
Ni: 4.0 to 9.0%, Cr: 16.0 to 21.0
%, Cu: more than 1.0 to 4.0%, N: 0.15 to 0.
30%, O: 0.0040% or less, B: 0.0015 to 0.0040%, and C
+ N: 0.20 to 0.35%, with the balance being Fe
And unavoidable impurities, and conditional expression: 530-410C
Austenitic stainless steel that satisfies -350N-10Mn-15Cr-30 (Ni + Cu) -10Mo ≦ -80.
Nb:0.05〜0.20%もしくはV:0.05〜
0.50%の1種または2種を含有し、かつ条件式:53
0-410C-350N-10Mn-15Cr-30(Ni+Cu)-10Mo≦-80 を満足す
るオーステナイト系ステンレス鋼。2. The composition of claim 1, further comprising:
Nb: 0.05 to 0.20% or V: 0.05 to
0.50% of one or two kinds, and the conditional expression: 53
Austenitic stainless steel satisfying 0-410C-350N-10Mn-15Cr-30 (Ni + Cu) -10Mo ≦ -80.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23877993A JP2944865B2 (en) | 1993-08-31 | 1993-08-31 | Stainless steel for high strength cold working |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23877993A JP2944865B2 (en) | 1993-08-31 | 1993-08-31 | Stainless steel for high strength cold working |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0770701A JPH0770701A (en) | 1995-03-14 |
JP2944865B2 true JP2944865B2 (en) | 1999-09-06 |
Family
ID=17035159
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JP23877993A Expired - Lifetime JP2944865B2 (en) | 1993-08-31 | 1993-08-31 | Stainless steel for high strength cold working |
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JP (1) | JP2944865B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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ITRM20070069A1 (en) * | 2007-02-12 | 2008-08-13 | Thyssenkrupp Acciai Speciali | AUSTENITIC STAINLESS STEEL |
ES2848386T3 (en) * | 2015-03-06 | 2021-08-09 | Nippon Steel & Sumikin Sst | High strength austenitic stainless steel that has excellent characteristics of resistance to hydrogen embrittlement and method of producing it |
US11149324B2 (en) | 2015-03-26 | 2021-10-19 | Nippon Steel Stainless Steel Corporation | High strength austenitic stainless steel having excellent resistance to hydrogen embrittlement, method for manufacturing the same, and hydrogen equipment used for high-pressure hydrogen gas and liquid hydrogen environment |
WO2022101278A1 (en) * | 2020-11-13 | 2022-05-19 | Acerinox Europa, S.A.U. | Low ni content austenitic stainless steel with high strength / ductility properties |
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1993
- 1993-08-31 JP JP23877993A patent/JP2944865B2/en not_active Expired - Lifetime
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JPH0770701A (en) | 1995-03-14 |
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