JPS63235428A - Manufacture of nonmagnetic material - Google Patents
Manufacture of nonmagnetic materialInfo
- Publication number
- JPS63235428A JPS63235428A JP6779487A JP6779487A JPS63235428A JP S63235428 A JPS63235428 A JP S63235428A JP 6779487 A JP6779487 A JP 6779487A JP 6779487 A JP6779487 A JP 6779487A JP S63235428 A JPS63235428 A JP S63235428A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion resistance
- final
- grain size
- steel
- cold rolling
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 title abstract description 20
- 238000000137 annealing Methods 0.000 claims abstract description 11
- 238000005097 cold rolling Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000005098 hot rolling Methods 0.000 claims abstract description 3
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000013078 crystal Substances 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 9
- 230000035699 permeability Effects 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は非磁性で高耐食性が要求されるブラウン管電子
銃用部品又は画像音声記憶装置（ＶＴＲ）をはじめとす
る磁気装置部品や、ＶＴＲテープカセットの案内軸（ガ
イドポール、ガイドピン等）等に用いる材料の製造方法
に関する。Detailed Description of the Invention [Industrial Field of Application] The present invention is applicable to components for cathode ray tube electron guns that are non-magnetic and require high corrosion resistance, components for magnetic devices such as video and audio storage devices (VTR), and VTR tapes. This invention relates to a method of manufacturing materials used for guide shafts (guide poles, guide pins, etc.) of cassettes.
［従来の技術］
ブラウン管電子銃用部品やＶＴＲテープカセットの案内
軸等の部品は、電子線や磁気テープといった磁気によっ
て影響を受けやすいものを扱う性質上、部品そのものが
非磁性であることが必要である。従って、板や条材から
これらの部品に加工することによって磁性、特に透磁率
が上昇しないことが重要であり、通常７０％の加工度で
も透磁率が１．０１以下であることが要求されている。[Prior Art] Parts for cathode ray tube electron guns, guide shafts for VTR tape cassettes, and other parts must be non-magnetic because they handle items that are easily affected by magnetism, such as electron beams and magnetic tape. It is. Therefore, it is important that the magnetism, especially the magnetic permeability, does not increase when processing plates and strips into these parts, and it is usually required that the magnetic permeability is 1.01 or less even at a processing rate of 70%. There is.
また、これらの部品は耐食性が良好なことも必要である
。耐食性が劣る、つまり錆が発生しやすい材料であると
この錆が磁気を帯びて部品の非磁性特性を害する。特に
ＶＴＲテープカセットの案内軸の様な部品に用いられる
場合には、磁気テープと接触するために、錆が素地から
剥離して摩耗の起点となりやすい。またこの摩耗が生じ
た場合、ざらにテープに傷をつけることになり著しい欠
陥を生じる。These parts also need to have good corrosion resistance. If the material has poor corrosion resistance, that is, is prone to rust, the rust will become magnetic and impair the non-magnetic properties of the component. Particularly when used in parts such as guide shafts of VTR tape cassettes, rust tends to peel off from the base material and become a starting point for wear due to contact with the magnetic tape. Furthermore, when this wear occurs, the tape is roughly scratched, resulting in significant defects.
一般に、これらの非磁性材料はプレス成形によって所定
の軸や部品に加工することが多いので、その際の加工性
も必要とされる。この加工性を良好とする主たるものと
して非金属介在物が少ないこと、異方性がないことの２
点が必要である。非金属介在物があると、プレス加工時
、特に絞り加工時に木目状の割れを生じ、製品として致
命的な欠陥となる。又、ＶＴＲテープカセットの案内軸
に使用した場合、素地にくらべ、多くの非金属介在物は
非常に硬いため、その部分でテープに傷をつけてしまう
ことになる。異方性も絞り加工時に多く問題になる現象
であり、真円度が出なかったり、著しい耳の発生があっ
たりして加工性悪化の原因となる。Generally, these non-magnetic materials are often processed into predetermined shafts or parts by press molding, so workability at that time is also required. The two main factors that make this workability good are a small amount of nonmetallic inclusions and no anisotropy.
points are required. If non-metallic inclusions are present, wood grain-like cracks will occur during pressing, especially during drawing, resulting in a fatal defect in the product. Furthermore, when used as a guide shaft for a VTR tape cassette, many of the nonmetallic inclusions are much harder than the base material, so the tape will be damaged by those parts. Anisotropy is also a phenomenon that often causes problems during drawing processing, and causes deterioration of workability due to lack of roundness or the occurrence of significant ears.
従来、これらの用途の材料としては５ｔｌＳ３０４Ｌ、
５ｔｌＳ３０５．３０３３１Ｂ、１６Ｃｒ−１４Ｎｉ−
Ｆｅといったオーステナイトの安定なステンレス鋼が用
いられている。Conventionally, materials for these applications include 5tlS304L,
5tlS305.30331B, 16Cr-14Ni-
A stable austenitic stainless steel such as Fe is used.
［発明が解決しようとする問題点］
上記従来用いられている材料は、耐食性に優れ、絞り加
工性も良好であるが、加工後も硬さがＨＶ３５０〜３８
０程度にしかならず、また高価なＮｉを多量に含有して
いるために高コストの材料であり、最近の厳しいコスト
ダウンの要求を満足し得ないものであった。[Problems to be Solved by the Invention] The conventionally used materials described above have excellent corrosion resistance and good drawing workability, but even after processing, the hardness is HV350-38.
Moreover, it is a high-cost material because it contains a large amount of expensive Ni, and cannot meet the recent strict demands for cost reduction.
本発明者らは、低コストの材料として、まず高Ｍｎ鋼に
着目したが、この材料の場合、非磁性特性と、１１ｖ４
００以上の高硬度は）ｑられるが、耐食性が著しく劣り
、電子銃部品やＶＴＲの案内軸に使えるものではないこ
とが分った。またこの材料の場合通常の製造方法では絞
りをはじめとするプレス加工が難しく、製造方法にも問
題があることが分った。The inventors first focused on high-Mn steel as a low-cost material, but this material has non-magnetic properties and 11v4
Although it has a high hardness of 00 or higher, it has been found to have extremely poor corrosion resistance and cannot be used for electron gun parts or VTR guide shafts. In addition, it was found that this material has problems with the manufacturing method, as it is difficult to perform press processing such as drawing using normal manufacturing methods.
本発明では、高Ｍｎ鋼でありながら、高硬度で耐食性の
良い非磁性材料であり、かつ良好なプレス加工性を有す
る材料の製法を確定するものである。The present invention establishes a manufacturing method for a material that is a high Mn steel, is a non-magnetic material with high hardness and good corrosion resistance, and has good press workability.
［問題点を解決するための手段］
本発明は、重量基準でＣ： ０．０５〜１．０％、Ｓｉ
：１．Ｏ％以下Ｍｎ：１５〜３０％、Ｎｉ：０．１〜
３．０％、ＡＩ：２．０〜６．０％、Ｓ：０．００５％
以下、Ｎ：０．０５％以下、０：０．０１％以下、残部
Ｆｅ及び不可避的不純物からなる鋼を熱間圧延後、冷間
圧延と焼鈍をくり返す製造工程において、圧下率２５〜
６５％の最終冷間圧延後、結晶粒が結晶粒度番号で７．
０〜１０．５になる様に最終焼鈍を行うことを特徴とす
る非磁性材料の製造方法である。[Means for solving the problems] The present invention provides C: 0.05 to 1.0%, Si
:1. 0% or less Mn: 15-30%, Ni: 0.1-
3.0%, AI: 2.0-6.0%, S: 0.005%
Hereinafter, in a manufacturing process in which steel consisting of N: 0.05% or less, 0: 0.01% or less, the balance Fe and unavoidable impurities is hot rolled, cold rolling and annealing are repeated, the rolling reduction is 25~
After final cold rolling of 65%, the grain size is 7.
This is a method for manufacturing a non-magnetic material, characterized by performing final annealing to obtain a magnetic flux of 0 to 10.5.
本発明で用いる鋼の成分範囲の限定理由を述べる。The reason for limiting the composition range of the steel used in the present invention will be described.
Ｃ；Ｃはオーステナイト安定化元素であり、そのために
は０．０５％以上必要である。また、１．０％を超えて
含有すると炭化物の析出が著しくプレス加工性を害する
。また耐食性も悪化する。よってその成分範囲を０．０
５〜１．０％とする。C; C is an austenite stabilizing element, and for this purpose it is required to be present in an amount of 0.05% or more. Moreover, if the content exceeds 1.0%, precipitation of carbides will significantly impair press workability. Corrosion resistance also deteriorates. Therefore, the component range is 0.0
5 to 1.0%.
Ｓｉ：Ｓｉは脱酸目的で添加する。１，０％を超えて含
有するとσ相の析出のおそれがあり、その結果、加工性
を害する。よってその成分範囲を１．０％以下とする。Si: Si is added for the purpose of deoxidizing. If the content exceeds 1.0%, there is a risk of precipitation of σ phase, which will impair workability. Therefore, its component range is set to 1.0% or less.
Ｍｎ ：Ｍｎはオースティトを安定にし、非磁性特性を
付与する。そのためには１５％以上必要である。また、
３０％を超えて含有すると、熱間加工性、冷間加工性が
阻害され割れ発生の原因となる。よってその成分範囲を
１５〜３０％とする。Mn: Mn stabilizes austite and imparts non-magnetic properties. For this purpose, 15% or more is required. Also,
If the content exceeds 30%, hot workability and cold workability will be inhibited, causing cracking. Therefore, the component range is set at 15 to 30%.
Ｎｉ；Ｎｉはオーステナイト安定に必要であり、耐食性
向上にも寄与する。そのためには０．１％以上必要であ
る。また、３．０％を超えて含有しても効果は飽和し、
しかもコストの上昇をまねく。よってその成分範囲を０
．１〜３．０％とする。Ni: Ni is necessary for stabilizing austenite and also contributes to improving corrosion resistance. For this purpose, 0.1% or more is required. In addition, even if the content exceeds 3.0%, the effect will be saturated,
Moreover, this leads to an increase in costs. Therefore, the component range is 0
．． 1 to 3.0%.
Ａｔ ：Ａｌは耐食性向上のために添加する。十分な耐
食性を１ｑるには２．０％以上必要である。At: Al is added to improve corrosion resistance. 2.0% or more is required to achieve sufficient corrosion resistance.
また、６．０％を超えて含有するとフェライト相を形成
し磁性が悪化する。よってその成分範囲を２．０〜６．
０％とする。Further, if the content exceeds 6.0%, a ferrite phase is formed and the magnetism deteriorates. Therefore, the component range is 2.0 to 6.
Set to 0%.
Ｓ；Ｓは主に介在物の形で材料中に存在する。S: S exists mainly in the form of inclusions in the material.
Ｓが０．００５％より多いと硫化物系介在物が多くなり
、プレス加工において欠陥を生じる。If S is more than 0.005%, sulfide-based inclusions will increase, causing defects in press working.
よってその成分範囲を０．００５％以下とする。Therefore, the range of its components is set to 0.005% or less.
ＮＵＮは主にＡ１との介在物の形で材料中に存在するこ
とか多い。Ｎが０．０５％より多いと窒化物系介在物が
多くなり、プレス加工において欠陥を生じる。また、Ｎ
は含有量が増大すると加工によって形成されたマルテン
サイト相の変形能を低下させる。よってその成分範囲を
０．０５％以下とする。NUN often exists in materials mainly in the form of inclusions with A1. If N is more than 0.05%, nitride-based inclusions will increase, causing defects in press working. Also, N
As the content increases, the deformability of the martensitic phase formed by processing decreases. Therefore, the range of its components is set to 0.05% or less.
Ｏ；Ｏは材料中で主に酸化物系介在物として存在する。O: O exists mainly as oxide inclusions in the material.
０．０１％を超えて含有すると大型の介在物が著しく増
加し、絞り加工時の割れ原因になる。よってその成分範
囲をｏ、 ｏｉ％以下とする。If the content exceeds 0.01%, the number of large inclusions will increase significantly, causing cracks during drawing. Therefore, the range of its components is set to below o, oi%.
次に製造工程の説明を行う。Next, the manufacturing process will be explained.
熱間圧延後冷間圧延と焼鈍が適数口くり返されるが、最
終圧延加工での圧下率が２５％より小ざい場合、次なる
焼鈍に際し結晶粒の成長が不均一となり、その結果、プ
レス成形時、異方性等の不良の原因となる。一方、圧下
率６５％を超えた場合、また強い異方性の原因となる。After hot rolling, cold rolling and annealing are repeated an appropriate number of times, but if the rolling reduction in the final rolling process is smaller than 25%, the growth of crystal grains will be uneven during the next annealing, and as a result, the pressing It causes defects such as anisotropy during molding. On the other hand, if the rolling reduction exceeds 65%, it also causes strong anisotropy.
よって最終冷間圧延の圧下率は２５〜６５％とする。Therefore, the reduction ratio in the final cold rolling is set to 25 to 65%.
最終焼鈍において結晶粒が結晶粒度番号で７．０より小
さくした場合、プレス加工時に肌荒れが著しくなり、部
品の外観をそこなう。又、結晶粒番号で１０．５より大
きい場合、伸びの回復が十分でなく結果としてプレス加
工時に割れが発生する。よって最終焼鈍による結晶粒度
は粒度番号で７．０〜１０．５になる様にする。If the crystal grain size number is smaller than 7.0 in the final annealing, the surface roughness during press working will be significant and the appearance of the part will be impaired. Further, if the grain number is larger than 10.5, recovery of elongation is not sufficient and as a result, cracks occur during press working. Therefore, the grain size after final annealing is set to be 7.0 to 10.5 in grain size number.
［実施例］
実施例１
第１表に示した組成の鋼を溶製、鋳造後、熱間圧延、酸
洗後、冷間圧延、焼鈍を行い、その後圧下率５０％の最
終冷間圧延、最終焼鈍により結晶粒度８．０１板厚ｏ、
５ｍｍの板を得た。[Example] Example 1 Steel having the composition shown in Table 1 was melted, cast, hot rolled, pickled, cold rolled, and annealed, and then final cold rolled at a rolling reduction of 50%. Grain size 8.01 plate thickness o due to final annealing,
A 5 mm plate was obtained.
この板をビン状に絞り加工し、加工性、硬度、透磁率を
調査した。また、６０℃、９５％の恒温恒湿槽内で１０
０時間保持し、錆の発生の有無を調査した。その結果を
第１表に併記した。This plate was drawn into a bottle shape and its workability, hardness, and magnetic permeability were investigated. In addition, 10% in a constant temperature and humidity chamber at 60℃ and 95%.
After holding for 0 hours, the presence or absence of rust was investigated. The results are also listed in Table 1.
第１表より明らかな様に本発明例１〜３は加工性も良好
であり、加工後の硬度も高く、また透磁率も十分低く、
耐食性も良好であり電子銃部品用またはＶＴＲ用案内軸
用材料として適している。As is clear from Table 1, Examples 1 to 3 of the present invention have good workability, high hardness after processing, and sufficiently low magnetic permeability.
It also has good corrosion resistance and is suitable as a material for electron gun parts or VTR guide shafts.
一方、比較例４はＣが低いため、硬さが不十分であり、
透磁率も悪い。またＳが高く、加工時に割れが発生した
。比較例５はＭｎが低く、加工性が十分ではなく透磁率
が悪い。On the other hand, Comparative Example 4 has insufficient hardness due to low C.
Magnetic permeability is also poor. In addition, the S content was high and cracks occurred during processing. Comparative Example 5 has low Mn, insufficient workability, and poor magnetic permeability.
比較例６はＮｉが低いため、オーステナイトが十分安定
ではなく、加工性、透磁率を害し、また耐食性も悪い。In Comparative Example 6, since the Ni content is low, the austenite is not sufficiently stable, which impairs workability and magnetic permeability, and the corrosion resistance is also poor.
比較例７はＡ１が低いため耐食性が悪い。比較例８〜９
はそれぞれ０１Ｎが高いため加工時に絞り割れが発生し
た。Comparative Example 7 has low A1 and therefore has poor corrosion resistance. Comparative examples 8-9
Because the 01N was high, drawing cracks occurred during processing.
比較例１０は３０３３１６であるが、硬度が不十分であ
り、透磁率も悪い。Comparative Example 10 is 303316, but has insufficient hardness and poor magnetic permeability.
実施例２
第１表における本発明例１の材料を用い、第２表に示し
た条件で最終冷間圧延、最終力鈍を行い、板厚０．５ｍ
ｍの板をＬその後のフレスによる絞り性を調査した。そ
の結果を身２表に併記する。Example 2 Using the material of Invention Example 1 in Table 1, final cold rolling and final stress dulling were performed under the conditions shown in Table 2 to obtain a sheet with a thickness of 0.5 m.
The drawability of the sheet L was examined using a press. The results are also listed in Table 2.
第２表より明らかなとおり、本発明例１へ４は絞り加工
性に優れている。一方、比較仔５は最終冷間圧延時の圧
下率が高いため異ｊ性が生じ、比較例６は圧下率が低い
ため混右となり、異方性および肌荒れが生じた。比郭例
７は結晶粒度が大きいく粒度番号が小さく”ために肌荒
れを生じ、比較例８は十分に再村晶していないため割れ
が生じた。As is clear from Table 2, Examples 1 to 4 of the present invention are excellent in drawing workability. On the other hand, Comparative Example 5 had a high rolling reduction during final cold rolling, resulting in anisotropy, and Comparative Example 6 had a low rolling reduction, resulting in mixed right, resulting in anisotropy and rough skin. Comparison Example 7 had a large crystal grain size and a small grain size number, resulting in rough skin, and Comparative Example 8 had cracks because it was not re-crystallized sufficiently.
第２表
と
「
七
紘）
［効 果］
以上の様に本発明は、非磁性、高硬度で耐食性の良い材
料の製造方法を提供するものであり、電子銃部品やＶＴ
Ｒテープカセット等のガイドピンを製造するに際して極
めて有効である。Table 2 and "Nanahiro" [Effects] As described above, the present invention provides a method for manufacturing a material that is non-magnetic, has high hardness, and has good corrosion resistance.
It is extremely effective in manufacturing guide pins for R-tape cassettes, etc.
Claims (1)
下Ｍｎ：１５〜３０％、Ｎｉ：０．１〜３．０％、Ａｌ
：２．０〜６．０％、Ｓ：０．００５％以下、Ｎ：０．
０５％以下、Ｏ：０．０１％以下、残部Ｆｅ及び不可避
的不純物からなる鋼を熱間圧延後、冷間圧延と焼鈍をく
り返す製造工程において、圧下率２５〜６５％の最終冷
間圧延後、結晶粒が結晶粒度番号で７．０〜１０．５に
なる様に最終焼鈍を行うことを特徴とする非磁性材料の
製造方法。Based on weight, C: 0.05-1.0%, Si: 1.0% or less Mn: 15-30%, Ni: 0.1-3.0%, Al
: 2.0 to 6.0%, S: 0.005% or less, N: 0.
After hot rolling steel consisting of O: 0.05% or less, O: 0.01% or less, balance Fe and unavoidable impurities, the final cold rolling at a reduction rate of 25 to 65% is performed in a manufacturing process that repeats cold rolling and annealing. A method for producing a non-magnetic material, which is then subjected to final annealing so that the crystal grains have a grain size number of 7.0 to 10.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6779487A JPS63235428A (en) | 1987-03-24 | 1987-03-24 | Manufacture of nonmagnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6779487A JPS63235428A (en) | 1987-03-24 | 1987-03-24 | Manufacture of nonmagnetic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63235428A true JPS63235428A (en) | 1988-09-30 |
Family
ID=13355213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6779487A Pending JPS63235428A (en) | 1987-03-24 | 1987-03-24 | Manufacture of nonmagnetic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63235428A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04202643A (en) * | 1990-11-30 | 1992-07-23 | Nkk Corp | Stainless steel having high strength and high toughness and its production |
| US5431753A (en) * | 1991-12-30 | 1995-07-11 | Pohang Iron & Steel Co. Ltd. | Manufacturing process for austenitic high manganese steel having superior formability, strengths and weldability |
| US6761780B2 (en) | 1999-01-27 | 2004-07-13 | Jfe Steel Corporation | Method of manufacturing a high Mn non-magnetic steel sheet for cryogenic temperature use |
| EP2431492A2 (en) * | 2009-04-28 | 2012-03-21 | Hyundai Steel Company | High manganese nitrogen-containing steel sheet having high strength and high ductility, and method for manufacturing same |
| US11414721B2 (en) | 2016-05-24 | 2022-08-16 | Arcelormittal | Method for the manufacture of TWIP steel sheet having an austenitic matrix |
-
1987
- 1987-03-24 JP JP6779487A patent/JPS63235428A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04202643A (en) * | 1990-11-30 | 1992-07-23 | Nkk Corp | Stainless steel having high strength and high toughness and its production |
| US5431753A (en) * | 1991-12-30 | 1995-07-11 | Pohang Iron & Steel Co. Ltd. | Manufacturing process for austenitic high manganese steel having superior formability, strengths and weldability |
| US6761780B2 (en) | 1999-01-27 | 2004-07-13 | Jfe Steel Corporation | Method of manufacturing a high Mn non-magnetic steel sheet for cryogenic temperature use |
| EP2431492A2 (en) * | 2009-04-28 | 2012-03-21 | Hyundai Steel Company | High manganese nitrogen-containing steel sheet having high strength and high ductility, and method for manufacturing same |
| EP2431492A4 (en) * | 2009-04-28 | 2014-01-22 | Hyundai Steel Co | High manganese nitrogen-containing steel sheet having high strength and high ductility, and method for manufacturing same |
| US11414721B2 (en) | 2016-05-24 | 2022-08-16 | Arcelormittal | Method for the manufacture of TWIP steel sheet having an austenitic matrix |
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