JPH01298115A - Production of high strength stainless steel wire - Google Patents
Production of high strength stainless steel wireInfo
- Publication number
- JPH01298115A JPH01298115A JP13120388A JP13120388A JPH01298115A JP H01298115 A JPH01298115 A JP H01298115A JP 13120388 A JP13120388 A JP 13120388A JP 13120388 A JP13120388 A JP 13120388A JP H01298115 A JPH01298115 A JP H01298115A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- stainless steel
- wire drawing
- steel wire
- strength
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000005491 wire drawing Methods 0.000 claims abstract description 16
- 230000003749 cleanliness Effects 0.000 claims abstract description 8
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 6
- 239000010432 diamond Substances 0.000 claims abstract description 6
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000002994 raw material Substances 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、耐食性および高強度が要求される金属線を
必要とする広範な分野で利用価値の高い高強度ステンレ
ス鋼線の製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method for manufacturing high-strength stainless steel wire, which has high utility value in a wide range of fields that require metal wires that require corrosion resistance and high strength. It is.
−ａに、高強度ステンレス鋼線を得る場合、５ＵＳ３０
４を代表とする準安定オーステナイト系ステンレス鋼を
冷間伸線し、加工誘起マルテンサイトを生じさせること
により高い加工硬化度を得、強化する方法を用いている
。この伸線加工時の断面減少率（加工度）を高くとるほ
ど強度は高まるが、過度に加工すると材料内部の非金属
介在物による切欠が相対的に拡大し、脆化するため、加
工度には限界がある。なお、この限界まで加工しても、
ステンレス鋼線の強度は炭素鋼ピアノ線に比べて低い。-a, when obtaining high strength stainless steel wire, 5US30
A method of cold drawing a metastable austenitic stainless steel, typically No. 4, to generate work-induced martensite, thereby obtaining a high degree of work hardening and strengthening it. The higher the cross-sectional reduction rate (working degree) during wire drawing, the higher the strength, but if the wire drawing process is excessively processed, the notch due to non-metallic inclusions inside the material will become relatively enlarged and become brittle, so the working degree will increase. has its limits. Furthermore, even if processed to this limit,
The strength of stainless steel wire is lower than that of carbon steel piano wire.
そこで、この発明はピアノ線と同等の高強度を存するス
テンレス鋼線を安定に、しかも効率的に得ることのでき
る製造方法を提供とようとするものである。Therefore, the present invention aims to provide a manufacturing method that can stably and efficiently produce stainless steel wire having a high strength equivalent to that of piano wire.
この発明の方法は重量比でＣを０．０５〜０．１５％、
Ｓｉを０．２〜１．０％、Ｍｎを０．５〜２．０％、Ｎ
ｉを７〜１０．５％、Ｃｒを１６．５〜２０．０％含有
し、残部がＦｅおよび不純物からなる準安定オーステナ
イト系ステンレス鋼の非金属介在物浄化度を０．０３％
以下に調整した鋼線を９５０〜１０５０℃で溶体化処理
後、加工度（−６，４ｄ ＋９５．５）％〜（−３，４
ｄ ＋９６．５）％の伸線加工（ｄは伸線加工後の線径
で０．０５ｍ〜６．０ｆｌ）を施すことを特徴とする。The method of this invention contains 0.05 to 0.15% C by weight;
Si 0.2-1.0%, Mn 0.5-2.0%, N
The degree of purification of nonmetallic inclusions of metastable austenitic stainless steel containing 7 to 10.5% of i, 16.5 to 20.0% of Cr, and the balance consisting of Fe and impurities is 0.03%.
After solution treatment of the steel wire adjusted below at 950 to 1050℃, the working degree is (-6,4d +95.5)% to (-3,4
d +96.5)% (d is the wire diameter after wire drawing, 0.05 m to 6.0 fl).
なお、さらに好ましくは、かかる方法において（−６，
４ａ ＋９５．５）％を越える領域での伸線加工にダイ
ヤモンドダイスを使用し、且、ダイス１個あたりの断面
率を１５％以下にすると従来になく耐久性に優れ、しか
も強度のばらつきが少ない高強度ステンレス鋼線を効率
良く得ることができる。Furthermore, more preferably, in such a method (-6,
Using diamond dies for wire drawing in areas exceeding 4a +95.5)% and reducing the cross-sectional area of each die to 15% or less provides unprecedented durability and less variation in strength. High strength stainless steel wire can be obtained efficiently.
市販のＳＵＳ ３０４ステンレス鋼線の伸線加工度の限
界は、予備調査によると、加工度−６，４ｄ ＋９５゜
５％以下であり、これ以上加工した場合には伸線加工中
に断線したり、加工できても靭性が著しく低下し、引張
強度の低いものしか得られないことを確認している。さ
らに断線破面および引張試験の破面の観察結果から、破
面の起点は介在物による切欠であることが明らかとなっ
た。そこで、この発明では以上の結果に基づき、次の手
順で方策を講じた。According to preliminary research, the limit of the drawing degree of commercially available SUS 304 stainless steel wire is -6.4d +95°5% or less, and if it is processed beyond this, the wire may break during the wire drawing process. It has been confirmed that even if it can be processed, the toughness is significantly reduced and only a product with low tensile strength can be obtained. Furthermore, from the observation results of the wire breakage surface and the fracture surface of the tensile test, it became clear that the starting point of the fracture surface was a notch caused by an inclusion. Therefore, in the present invention, based on the above results, the following measures were taken.
（１１素材の非金属介在物清浄度を０．０３％以下に調
整する。(Adjust the non-metallic inclusion cleanliness of 11 materials to 0.03% or less.
市販のＳＯ３３０４鋼の清浄度は０．０４％前後である
が、真空二重溶解法などの特殊な溶解法を採用し、介在
物清浄度を０．０３％以下に改善した結果、伸線加工度
の限界が高まった。この効果により、従来以上の高強度
が得られるが、靭性が十分でないため引張強度がばらつ
く、従って、この＋１１の対策のみでは不充分である。The cleanliness of commercially available SO3304 steel is around 0.04%, but by using a special melting method such as vacuum double melting, we have improved the inclusion cleanliness to 0.03% or less, which makes wire drawing process possible. The limits of degree have increased. Due to this effect, higher strength than before can be obtained, but since the toughness is not sufficient, the tensile strength varies, so this +11 measure alone is insufficient.
（２）溶体化処理を９５０〜１０５０℃の範囲で実施す
る。(2) Solution treatment is carried out at a temperature of 950 to 1050°C.
通常、溶体化処理は生産性を高めるため、１１００℃前
後の高温で短時間処理される。ところが、この場合、結
晶粒が粒径３０−程度まで粗大化し、この粗大化が靭性
の低下の一因となる。このため、溶体化温度を９５０〜
１０５０℃として結晶粒径を２５ｔｔｍ以下に抑制した
ところ、靭性の低下を確実に防ぐことができた。Usually, solution treatment is carried out at a high temperature of around 1100° C. for a short period of time in order to increase productivity. However, in this case, the crystal grains become coarse to a grain size of about 30 mm, and this coarsening becomes a cause of a decrease in toughness. For this reason, the solution temperature should be set at 950~
When the temperature was set at 1050° C. and the crystal grain size was suppressed to 25 ttm or less, a decrease in toughness could be reliably prevented.
以上の結果、加工度（−３，４ｄ ＋９６．５）％まで
靭性を損なうことなく加工可能となり、この方式により
得られる鋼線は安定してピアノ線と同等の高強度を示す
ようになった。As a result of the above, it has become possible to process up to a working degree of (-3,4d +96.5)% without compromising toughness, and the steel wire obtained by this method has stably shown high strength equivalent to piano wire. .
また、加工度（−６，４ｄ＋９５．５）％を越える領域
での加工に、摩擦抵抗の少ないダイヤモンドダイスを使
用し、且、ダイス１個あたりの減面率を、従来の２０％
前後から１５％以下とした場合には、線材の引抜き力が
大幅に小さくなって例えば仕上り径が０．０５ｔｍの非
常に細い線、６．０ｆｉの非常に太い線であっても、生
産性を損なう断線等のトラブルを招かずに上記高加工領
域までの伸線が可能であり、請求項のｉｌｌに記載の方
法で得られる高強度ステンレス鋼線を効率良く生産する
ことができた。In addition, diamond dies with low frictional resistance are used for machining in areas where the machining rate exceeds (-6, 4d + 95.5)%, and the area reduction rate per die is 20% of the conventional one.
If it is 15% or less from the front and back, the drawing force of the wire rod will be significantly reduced, and the productivity will be improved, even for a very thin wire with a finished diameter of 0.05 tm or a very thick wire of 6.0 fi. It was possible to draw the wire up to the above-mentioned high processing range without causing troubles such as damaging wire breakage, and it was possible to efficiently produce the high-strength stainless steel wire obtained by the method described in the illumination of the claim.
なお、上記の加工度領域にダイヤモンドダイスを用いた
としても線径が０．０５ｍ以下では、鋼線の破断荷重に
対し、引抜力が過大となって加工中に断線し易く、一方
、６，０鶴以上では、塑性変形に伴なう多大な加工熱に
よる温度上昇で潤滑不良を生じ易くなり、いずれの場合
も量産が困難となる。In addition, even if a diamond die is used in the above-mentioned processing range, if the wire diameter is 0.05 m or less, the drawing force will be excessive compared to the breaking load of the steel wire, and the wire will easily break during processing. If the temperature is 0 or more, poor lubrication is likely to occur due to temperature rise due to large processing heat accompanying plastic deformation, and mass production becomes difficult in either case.
従って、線の仕上り径は０．０５〜６．０鶴の範囲とす
る。Therefore, the finished diameter of the wire should be in the range of 0.05 to 6.0 mm.
また、本発明に素材として用いるステンレス鋼は、各成
分の含有量が下記の範囲にあるものが好ましい、 （ｔ
！はいずれもＭ量％である。In addition, the stainless steel used as a material in the present invention preferably has a content of each component within the following range.
! Both are M amount %.
ｃ ： ｏ、ｏｓ〜０．１５％。このＣは、強化に必要
な元素で０．０４％未満では強度不足を招き、逆に０．
１５％を越えると耐食性が低下する。c: o, os~0.15%. This C is an element necessary for strengthening, and if it is less than 0.04%, it will lead to insufficient strength;
If it exceeds 15%, corrosion resistance will decrease.
Ｓｉ ： ０．２〜１．０％。これは脱酸剤として添加
する。その量が０．２％以下では脱酸不足となり、また
１、０％を越える添加は熱間加工性を低下させる。Si: 0.2-1.0%. This is added as a deoxidizing agent. If the amount is less than 0.2%, deoxidation will be insufficient, and if it is added in excess of 1.0%, hot workability will be reduced.
Ｍｎ ： ０．５〜２．０％。このＭｎは熱間加工性改
善のために添加されるが、その量が０．５％未満では効
果が薄＜、２．０％を越えると靭性が低下する。Mn: 0.5-2.0%. This Mn is added to improve hot workability, but if the amount is less than 0.5%, the effect is weak, and if it exceeds 2.0%, the toughness decreases.
Ｎｉ ： ７〜１０．５％、 Ｃｒ ： １６．５〜２
０．０％。これ等はステンレス鋼の耐食性を確保し、且
、冷間加工により高強度が得られる準安定オーステナイ
ト相とするために用いるので、少なくともＣｒは１６．
５％、Ｎｉは７％必要である。また、上限は添加量相応
の増強効果が生じる訳ではないので経済性を考慮してＣ
ｒ２Ｏ，０％、Ｎｉ１０．５％とした。Ni: 7-10.5%, Cr: 16.5-2
0.0%. These are used to ensure the corrosion resistance of stainless steel and to create a metastable austenite phase that can obtain high strength through cold working, so at least Cr is 16.
5%, and 7% of Ni is required. In addition, since the upper limit does not necessarily produce an enhancement effect commensurate with the amount added, C
r2O, 0%, Ni 10.5%.
（実施例〕 本発明法、および従来法の供試材を次の通り準備した。(Example〕 Test materials for the method of the present invention and the conventional method were prepared as follows.
鋼種はいづれもＳＯ３３０４である。The steel type is SO3304 in all cases.
本発明法・・・・・・真空誘導溶解炉を用いて溶解し、
さらに真空アーク溶解炉で再溶解し
た鋼塊を熱間圧延して得られた材料。The method of the present invention...melting using a vacuum induction melting furnace,
A material obtained by hot rolling steel ingots that have been further melted in a vacuum arc melting furnace.
従来法・・・・・・ＡＯＤ炉で精練された量産の熱間圧
延材。Conventional method: Mass-produced hot-rolled material refined in an AOD furnace.
それぞれの供試材の化学組成と、ＪＩＳ Ｇ ０５５５
による非金属介在物清浄度の測定結果を第１表に示す。Chemical composition of each sample material and JIS G 0555
Table 1 shows the measurement results of the cleanliness of non-metallic inclusions.
第１表
上記の各素材を用い、線径調整のため、冷間伸線を実施
した後、溶体化処理を下記の条件で行なった。Table 1 Using each of the above-mentioned materials, cold wire drawing was performed to adjust the wire diameter, and then solution treatment was performed under the following conditions.
本発明法１０００°Ｃ×（２分／ｄ以上）（ｄは線径（
ｍｍ） ）従来法 １１００℃×（１分／ｄ以上ン（ｄ
は線ｊｌ（ｍＪン次いで最終伸線を実施し、線径０．２
．１．０．２゜０．３．５ ｍｓの４種類の鋼線を作製
しそれぞれに引張試験を実施した。第２表に本発明法、
および従来法の製造条件と引張試験結果を示す。Invention method 1000°C x (2 min/d or more) (d is wire diameter (
mm) ) Conventional method 1100°C x (1 min/d or more (d
The wire jl (mJ) was then subjected to final wire drawing, and the wire diameter was 0.2
．． Four types of steel wires of 1.0.2° and 0.3.5 ms were prepared and a tensile test was conducted on each. Table 2 shows the method of the present invention,
The manufacturing conditions and tensile test results of the conventional method are also shown.
第 ２ 表
以上のように、本発明法により得られるステンレス鋼線
の引張強度は従来法によるものよりも高く、ピアノ線に
匹敵し、また絞り値は従来法によるものと同等で安定し
た靭性を示している。As shown in Table 2, the tensile strength of the stainless steel wire obtained by the method of the present invention is higher than that obtained by the conventional method and is comparable to that of piano wire, and the aperture value is the same as that obtained by the conventional method and has stable toughness. It shows.
以上説明したように、本発明の製造方法によれば、非介
在物清浄度を０．０３％以下に調整後、９５０〜１０５
０℃の温度で溶体化処理を実施し、しかる後、所定の範
囲の加工度で伸線を行なうので、耐食性に優れたステン
レスＩ線の強度をピアノ線°のレベルまで向上させるこ
とができる。As explained above, according to the manufacturing method of the present invention, after adjusting the inclusion-free cleanliness to 0.03% or less,
Since the solution treatment is carried out at a temperature of 0°C and then the wire is drawn at a working degree within a predetermined range, the strength of the stainless steel I wire, which has excellent corrosion resistance, can be improved to the level of piano wire.
また、（−６，４ｄ ＋９５．５）％を越える領域での
伸線加工にダイヤモンドダイスを用いてダイス１個当り
の減面率を１５％以下に設定する方法によると、ダイス
とのＦ！！擦抵抗抵抗工熱による潤滑不良に起因した断
線、焼付き等のトラブルを起こさずに上述の高強度ステ
ンレス鋼線を効率よく生産することが可能になると云う
効果が得られる。In addition, according to a method in which a diamond die is used for wire drawing in an area exceeding (-6,4d +95.5)% and the area reduction rate per die is set to 15% or less, F! ! The effect is that the above-mentioned high-strength stainless steel wire can be efficiently produced without causing troubles such as wire breakage and seizure due to poor lubrication due to friction resistance heat.
特許出願人 住友電気工業株式会社Patent applicant: Sumitomo Electric Industries, Ltd.
Claims (2)
２〜１．０％、Ｍｎを０．５〜２．０％、Ｎｉを７〜１
０．５％、Ｃｒを１６． ５〜２０．０％含有し、残部がＦｅおよび不純物からな
り、非金属介在物清浄度を０．０３％以下（ＪＩＳＧ０
５５５）に向上させた準安定オーステナイト系ステンレ
ス鋼素材を９５０〜１０５０℃で溶体化処理後、（−６
．４ｄ＋９５．５）％〜（−３．４ｄ＋９６．５）％（
ただし、ｄは伸線加工後の線径で０．０５ｍｍ〜６．０
ｍｍ）の断面減少を伴なう伸線加工を施すことを特徴と
する高強度ステンレス鋼線の製造方法。(1) 0.05 to 0.15% C and 0.0% Si by weight.
2-1.0%, Mn 0.5-2.0%, Ni 7-1
0.5%, Cr 16. 5 to 20.0%, with the remainder consisting of Fe and impurities, and the cleanliness of nonmetallic inclusions is 0.03% or less (JIS G0
After solution treatment at 950 to 1050°C, a metastable austenitic stainless steel material improved to (-6
．． 4d+95.5)%~(-3.4d+96.5)%(
However, d is the wire diameter after wire drawing from 0.05mm to 6.0
1. A method for producing a high-strength stainless steel wire, which comprises performing a wire drawing process with a cross-section reduction of 1.5 mm.
４ｄ＋９５．５）％を越える領域での伸線加工にダイヤ
モンドダイスを使用し、且、ダイス１個あたりの減面率
を１５％以下とすること特徴とする高強度ステンレス鋼
線の製造方法。(2) In the manufacturing method according to claim (1), (-6.
A method for producing a high-strength stainless steel wire, characterized in that diamond dies are used for wire drawing in a region exceeding 4d+95.5)%, and the area reduction rate per die is 15% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13120388A JPH01298115A (en) | 1988-05-26 | 1988-05-26 | Production of high strength stainless steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13120388A JPH01298115A (en) | 1988-05-26 | 1988-05-26 | Production of high strength stainless steel wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01298115A true JPH01298115A (en) | 1989-12-01 |
Family
ID=15052454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13120388A Pending JPH01298115A (en) | 1988-05-26 | 1988-05-26 | Production of high strength stainless steel wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01298115A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0361322A (en) * | 1989-07-28 | 1991-03-18 | Nippon Steel Corp | Production of austenitic stainless steel excellent in drawability and cold rollability |
| CN109439882A (en) * | 2018-12-27 | 2019-03-08 | 东莞科力线材技术有限公司 | Superplasticity abnormal shape stainless steel support wire rod and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215738A (en) * | 1984-04-09 | 1985-10-29 | Daido Steel Co Ltd | Stainless steel wire rod for hyperfine wire |
| JPS6357744A (en) * | 1986-08-26 | 1988-03-12 | Kobe Steel Ltd | Austenitic stainless steel wire rod combining high strength with high toughness |
-
1988
- 1988-05-26 JP JP13120388A patent/JPH01298115A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215738A (en) * | 1984-04-09 | 1985-10-29 | Daido Steel Co Ltd | Stainless steel wire rod for hyperfine wire |
| JPS6357744A (en) * | 1986-08-26 | 1988-03-12 | Kobe Steel Ltd | Austenitic stainless steel wire rod combining high strength with high toughness |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0361322A (en) * | 1989-07-28 | 1991-03-18 | Nippon Steel Corp | Production of austenitic stainless steel excellent in drawability and cold rollability |
| CN109439882A (en) * | 2018-12-27 | 2019-03-08 | 东莞科力线材技术有限公司 | Superplasticity abnormal shape stainless steel support wire rod and preparation method thereof |
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