EP0773306A1 - Rostfreier ferritischer Stahl, verwendbar zur Herstellung von Stahlwolle - Google Patents

Rostfreier ferritischer Stahl, verwendbar zur Herstellung von Stahlwolle Download PDF

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Publication number
EP0773306A1
EP0773306A1 EP96402088A EP96402088A EP0773306A1 EP 0773306 A1 EP0773306 A1 EP 0773306A1 EP 96402088 A EP96402088 A EP 96402088A EP 96402088 A EP96402088 A EP 96402088A EP 0773306 A1 EP0773306 A1 EP 0773306A1
Authority
EP
European Patent Office
Prior art keywords
steel
calcium
oxygen
wool
inclusions
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.)
Granted
Application number
EP96402088A
Other languages
English (en)
French (fr)
Other versions
EP0773306B1 (de
Inventor
Pascal Terrien
Claude Bioteau
Pierre Pedarre
Bernadette Sicoli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ugitech SA
Original Assignee
Ugine Savoie SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ugine Savoie SA filed Critical Ugine Savoie SA
Publication of EP0773306A1 publication Critical patent/EP0773306A1/de
Application granted granted Critical
Publication of EP0773306B1 publication Critical patent/EP0773306B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12431—Foil or filament smaller than 6 mils

Definitions

  • the present invention relates to a ferritic stainless steel usable for the production of steel wool.
  • Steel wool is obtained by a technique called shaving.
  • Steel wool is produced on a shaving installation from a steel wire wound in one or more layers of contiguous son on cylinders driven in rotation.
  • a layer of contiguous threads passes over cutting tools which will produce chips constituting the wool.
  • the depth of cut which corresponds to the thickness of the chip is determined by the force of support of the tool on the ply of wires.
  • the wire running speed on the tools which corresponds to a cutting speed, is of the order of 30 meters per minute for shaving stainless steel wires and 50 meters per minute for shaving mild steel wires .
  • the shavings which form the wool are driven towards the front of the installation where they are wound on a sleeve.
  • the invention aims to provide a steel which, in the form of wire, can be used for shaving operations for the manufacture of steel wool.
  • the invention also relates to a wire for the production of steel wool, wire obtained by wire drawing and which contains inclusions of the anorthite and / or pseudo-wollastonite and / or gehlenite and / or tridymite type.
  • Figure 1 is a diagram showing an installation for the production of steel wool.
  • FIG. 2 is a diagram, in perspective, of a winding forming a lower ply and an upper ply of an installation.
  • Figure 1 shows a diagram of a shaving installation 1.
  • the size of installation 1 is of the order of 10 meters in length, 3 meters in width and 2 meters in height.
  • the steel wire 2 intended for shaving is wound in sheets 3, between two cylinders 4 driven in rotation.
  • a sheet 3 is made up of approximately 15 contiguous wires 2.
  • Each of the layers 3 moves on cutting tools 5 called combs, which produce chips 6 constituting the fibers of steel wool.
  • the chips 6 forming the steel wool fibers are driven towards the front of the installation and wound on a sleeve 7 for recovering the wool.
  • FIG. 2 is a diagram, in perspective, of a winding forming a lower ply 3 and an upper ply 3.
  • the lower ply 3 passes over tools 5 in the form of a knife, placed substantially perpendicular to the movement of the wires 2.
  • the tools 5 are made of high-speed steel and have, in draft, ridges whose spacing defines a grade of steel wool or the width of the chips 6.
  • the speed of travel of the wire 2 between the cylinders 4, which corresponds to the cutting speed of the tools 5, is between 30 and 50 meters per minute, a speed which must remain relatively low to avoid the heating of fine wool shavings 6 of steel.
  • the depth of the shaving pass is provided by the force of support of the tools 5 on the plies 3 of wires 2. It is this force which defines the thickness of the chip.
  • the thickness of the chips 6 is generally less than 50 micrometers, knowing that it is commonly used, about 20 micrometers.
  • the width of the chips 6, depending on the cutting tool 5 or comb is commonly about 50 to 70 micrometers. These dimensions ultimately remain of the same order of magnitude as those of the inclusions as presented in Table 3. It is not uncommon for steel in the form of wire to have inclusions having a width of approximately 15 micrometers, the majority having a width of between 5 and 15 micrometers.
  • the wire being subjected to the shaving operation in the direction of its length, it is indeed the width of the inclusions that must be considered, the length having little influence on the ability to shave.
  • it is therefore preferable to have a wire comprising elongated inclusions, which is confirmed by the following exemplary embodiments.
  • the quality of the wool according to the criteria listed above is defined, on monitoring sheets, by qualifiers of the type: recommended, not recommended, rejected.
  • the steel according to the invention may also contain titanium, tantalum, zirconium, niobium which improve the resistance to oxidation.
  • the introduction of molybdenum into the composition of the steel improves the corrosion resistance and the heat resistance.
  • the steel according to the invention produced in the form of a wire has deformed inclusions after rolling and drawing, inclusions whose width is less than 5 micrometers, the inclusions being lime aluminosilicates of the anorthite and / or pseudo-wollastonite type and / or gehlenite and / or tridymite.
  • the mechanical properties of steel ensure good quality of the steel wool fiber.
  • the steel is suitable for machining of the shaving type at low cutting speed.
  • carbon is an element which tends to stabilize the austenitic phase compared to the ferritic phase.
  • this element is very slightly soluble in ferrite at room temperature. Given the high value of carbon diffusion coefficient in the matrix of the centered cubic type of ferrite, it follows that unless the concentration of this element is lowered below very low contents, it is very difficult to limit precipitation of chromium carbides at room temperature.
  • these chromium carbides divert the use of chromium and are surrounded by zones depleted in chromium. The material therefore sees its corrosion resistance degraded. It may be better to lower the carbon content to less than 0.08%.
  • carbon increases the mechanical characteristics of steel, and, for certain applications, the carbon content can reach 0.2%.
  • the fact of having low calcium and oxygen contents, while respecting the Ca / O ratio makes it possible to obtain an excellent behavior of the steel in shaving. It was noted that the presence of more than 30.10 -4 % of calcium and more than 70.10 -4 % of oxygen was also favorable. It is thus possible to avoid extensive deoxidation during the production of the steel, provided however of having a Ca / O ratio of between 0.2 and 0.7.
  • Table 1 shows 6 steels, three of which are reference steels, steels A, B, C, being steels according to the invention. TABLE 1 steel ref 1 steel ref 2 steel ref 3 steel A steel B steel C carbon% 0.040 0.038 0.037 0.042 0.036 0.039.
  • the comparison between the reference steels 1, 2 and 3, presented above and the steels A, B, C, according to the invention shows that the inclusions naturally obtained, after production of the reference steel and its forming in the form of wire for shaving, are very wide. In addition, they are by nature hard and abrasive.
  • the inclusions contained in the shaving wire according to the invention are elongated, their width is significantly smaller than the inclusions contained in the reference steels. This elongation of the inclusions reflects a low flow stress of said inclusions and therefore a reduced hardness compared to that of the reference steels.
  • Table 4 highlights the productivity gains in steel wool made by the use of the steels according to the invention.
  • the weight per meter of wool is significantly higher with the steels according to the invention and the thickness of the residual yarn is lower, which reduces the losses of raw material.
  • the tools used for shaving reference steels have rapid wear compared to the wear of the tools used for shaving steels according to the invention.
  • the wool is of better quality when it is obtained by shaving the steels according to the invention.
  • inclusions of the Al2O3-SiO2 - CaO type satisfy, from the point of view of element contents, the Ca / O ratio which is between 0.2 and 0.7. It can also be noted, in the analysis of the characteristics in Table 2, that high mechanical characteristics tend to improve the shaving ability of steels.
  • the invention does not consist in introducing into the steel a quantity of inclusions of a certain type but consists in the production of a steel containing inclusions inherent in its production, the inclusions reduced in number being, according to the invention, inclusions of lime aluminosilicates.
  • the invention consists mainly in a modification of the nature of the residual oxide inclusions, without seeking an increase in their density, so as to obtain, after rolling and drawing, residual inclusions of small width.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Fibers (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP96402088A 1995-11-03 1996-10-01 Rostfreier ferritischer Stahl, verwendbar zur Herstellung von Stahlwolle Expired - Lifetime EP0773306B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512976 1995-11-03
FR9512976A FR2740783B1 (fr) 1995-11-03 1995-11-03 Acier inoxydable ferritique utilisable pour la production de laine d'acier

Publications (2)

Publication Number Publication Date
EP0773306A1 true EP0773306A1 (de) 1997-05-14
EP0773306B1 EP0773306B1 (de) 2000-12-20

Family

ID=9484188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402088A Expired - Lifetime EP0773306B1 (de) 1995-11-03 1996-10-01 Rostfreier ferritischer Stahl, verwendbar zur Herstellung von Stahlwolle

Country Status (8)

Country Link
US (1) US5795411A (de)
EP (1) EP0773306B1 (de)
CN (1) CN1066206C (de)
AT (1) ATE198221T1 (de)
CA (1) CA2188505C (de)
DE (1) DE69611277T2 (de)
ES (1) ES2153943T3 (de)
FR (1) FR2740783B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314792A1 (de) * 2001-11-26 2003-05-28 Usinor Ferritischer rostfreier schwefelhaltiger Stahl verwendbar für ferromagnetische Werkstücke

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811683B1 (fr) * 2000-07-12 2002-08-30 Ugine Savoie Imphy Acier inoxydable ferritique utilisable pour des pieces ferromagnetiques
US7842434B2 (en) * 2005-06-15 2010-11-30 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US8158057B2 (en) * 2005-06-15 2012-04-17 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US7981561B2 (en) * 2005-06-15 2011-07-19 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US20080096042A1 (en) * 2004-10-15 2008-04-24 Universita' Degli Studi Di Milano Process For The Preparation Of Metallic Wools With A Controlled Degree Of Surface Oxidation And Fibres Deriving From Them: Products Obtained, And Their Use As Supports To Obtain Metaalic Core Composite Materials For A Variety Of Applications
UA111115C2 (uk) 2012-04-02 2016-03-25 Ейкей Стіл Пропертіс, Інк. Рентабельна феритна нержавіюча сталь
JP6308869B2 (ja) * 2014-05-27 2018-04-11 新日鐵住金ステンレス株式会社 成形性及び耐孔食性に優れたフェライト系ステンレス鋼線及びその製造方法
CN104290048B (zh) * 2014-09-26 2017-12-26 湖北瑞特威钢棉有限公司 含皂钢丝棉块成型机
CN107058906B (zh) * 2017-02-21 2018-11-16 山西太钢不锈钢股份有限公司 不锈钢、圆珠笔头用不锈钢线材及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2143256A1 (de) * 1971-06-24 1973-02-02 Bekaert Sa Nv
FR2445388A1 (fr) * 1978-12-25 1980-07-25 Daido Steel Co Ltd Acier de decolletage contenant des particules incluses de sulfure ayant un allongement, une taille et une distribution determines
FR2456785A1 (fr) * 1979-05-17 1980-12-12 Daido Steel Co Ltd Acier de decolletage contenant des inclusions determinees et un procede de sa preparation
EP0403332A1 (de) * 1989-06-16 1990-12-19 Ugine Savoie Heraufgeschwefelter rostfreier austenitischer Stahl mit erhöhter Bearbeitbarkeit
JPH06145908A (ja) * 1992-11-04 1994-05-27 Daido Steel Co Ltd カルシウム快削ステンレス鋼

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2706489B1 (fr) * 1993-06-14 1995-09-01 Ugine Savoie Sa Acier inoxydable martensitique à usinabilité améliorée.
FR2720410B1 (fr) * 1994-05-31 1996-06-28 Ugine Savoie Sa Acier inoxydable ferritique à usinabilité améliorée.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2143256A1 (de) * 1971-06-24 1973-02-02 Bekaert Sa Nv
FR2445388A1 (fr) * 1978-12-25 1980-07-25 Daido Steel Co Ltd Acier de decolletage contenant des particules incluses de sulfure ayant un allongement, une taille et une distribution determines
FR2456785A1 (fr) * 1979-05-17 1980-12-12 Daido Steel Co Ltd Acier de decolletage contenant des inclusions determinees et un procede de sa preparation
EP0403332A1 (de) * 1989-06-16 1990-12-19 Ugine Savoie Heraufgeschwefelter rostfreier austenitischer Stahl mit erhöhter Bearbeitbarkeit
JPH06145908A (ja) * 1992-11-04 1994-05-27 Daido Steel Co Ltd カルシウム快削ステンレス鋼

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 18, no. 468 (C - 1244) 31 August 1994 (1994-08-31) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314792A1 (de) * 2001-11-26 2003-05-28 Usinor Ferritischer rostfreier schwefelhaltiger Stahl verwendbar für ferromagnetische Werkstücke
FR2832734A1 (fr) * 2001-11-26 2003-05-30 Usinor Acier inoxydable ferritique au soufre, utilisable pour des pieces ferromagnetiques
US6921511B2 (en) 2001-11-26 2005-07-26 Ugitech Sulphur-containing ferritic stainless steel that can be used for ferromagnetic parts

Also Published As

Publication number Publication date
ATE198221T1 (de) 2001-01-15
CN1161381A (zh) 1997-10-08
DE69611277D1 (de) 2001-01-25
FR2740783A1 (fr) 1997-05-09
ES2153943T3 (es) 2001-03-16
US5795411A (en) 1998-08-18
FR2740783B1 (fr) 1998-03-06
DE69611277T2 (de) 2001-07-12
CA2188505A1 (fr) 1997-05-04
CA2188505C (fr) 2003-12-09
EP0773306B1 (de) 2000-12-20
CN1066206C (zh) 2001-05-23

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