EP1288323A1 - Acier au chrome résistant à la corrosion et déformable à froid - Google Patents

Acier au chrome résistant à la corrosion et déformable à froid Download PDF

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Publication number
EP1288323A1
EP1288323A1 EP02019608A EP02019608A EP1288323A1 EP 1288323 A1 EP1288323 A1 EP 1288323A1 EP 02019608 A EP02019608 A EP 02019608A EP 02019608 A EP02019608 A EP 02019608A EP 1288323 A1 EP1288323 A1 EP 1288323A1
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EP
European Patent Office
Prior art keywords
titanium
steel
chrome
steel according
manganese
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
EP02019608A
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German (de)
English (en)
Other versions
EP1288323B1 (fr
Inventor
Günter Schnabel
Thomas Wegler
Dieter Geile
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.)
Stahlwerk Ergste Westig GmbH
Original Assignee
Stahlwerk Ergste Westig GmbH
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Publication of EP1288323A1 publication Critical patent/EP1288323A1/fr
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Publication of EP1288323B1 publication Critical patent/EP1288323B1/fr
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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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

Definitions

  • the invention relates to a cold-deformable, corrosion-resistant Chromium steel in particular with a ferritic structure and takes priority German patent application 101 43 390.5 to which reference is made to the content.
  • Such steels are known. They have good magnetizability, such as the soft magnetic described in U.S. Patent 4,714,502 Steel with up to 0.03% carbon, 0.40 to 1.10% silicon, up to 0.50% manganese, 9.0 to 19% chromium, up to 2.5% molybdenum, up to 0.5% nickel, up to 0.5% copper, 0.02 to 0.25% titanium, 0.010 to 0.030% sulfur, to 0.03% nitrogen, 0.31 to 0.60% aluminum, 0.10 to 0.30% lead and 0.02 to 0.10% zirconium.
  • the steel is rustproof and cold formable; it is suitable as a material for Manufacture of cores for solenoid valves, electromagnetic clutches or housing of electronic injection systems for internal combustion engines.
  • Another soft magnetic stainless chrome steel with up to 0.05% carbon, up to 6% silicon, 11 to 20% chromium, up to 5% aluminum, 0.03 to 0.40% Lead, 0.001 to 0.009% calcium and 0.01 to 0.30% tellurium is from the U.S. patent 3 925 063 known and owns due to its contents Lead, calcium and tellurium have good machinability. A disadvantage of this However, steel is the use of toxic, machinability improving elements lead and tellurium.
  • the cause of the mentioned run is inhomogeneity in the structure, in particular hard excretions in the form of nests and islands Titanium carbides, carbonitrides, nitrides, manganese sulfide and heterogeneous silicon aluminum oxides. These excrements are replaced by thin micro-drills for example with diameters under 0.5 mm and slim Micro tools towards softer material zones. Such one Evasion naturally does not take place when the excretions finely dispersed or fine-grained homogeneous and distributed in the structure.
  • the invention aims a cold-formable corrosion-resistant chrome steel with improved Machinability, especially with a low tendency to build-up edges and / or to create bonds, in particular a Directional drilling, embossing and punching also possible when Tools with a small cross-section and low rigidity, for example Micro drills are used.
  • the invention proposes a steel with at least 8% chromium and at most 0.1% carbon and certain contents of manganese and / or bismuth, titanium and / or vanadium and / or niobium, as well as sulfur and copper, which in the melt lead to primary precipitates in the form of sulfocarbides of the metals titanium, vanadium and niobium of the type Me 4 C 2 S 2 , for example Ti 4 C 2 S 2 .
  • the sulfocarbides are in a fine distribution in the melt and serve as nuclei for manganese sulfide precipitates, which are then distributed evenly and finely in the melt.
  • the presence of bismuth promotes the finely dispersed and homogeneous distribution of the manganese sulfide in the steel.
  • Bismuth promotes the elimination of the titanium sulfocarbides and causes this way a finely dispersed excretion of the manganese sulfide low supersaturation of the melt.
  • the levels of machining should promote Elements titanium, vanadium, niobium on the one hand and the one for the creation carbon and sulfur responsible for sulfocarbides be coordinated in a certain way. Higher levels of manganese and sulfur to improve micro-machinability are then no longer necessary because the manganese sulfide is in larger connected agglomerates is present. At the same time, the emergence of intermetallic titanium / aluminum precipitations that impair machinability suppresses and prevents titanium and Aluminum goes into solution and so the tendency to form bonds and reinforce construction edges.
  • the nitrogen content of the steel should be as low as possible to avoid formation of primary germs from titanium carbosulfides by setting the To affect Titan as TiN.
  • the chrome steel according to the invention contains in detail 0.005 to 0.1% carbon 0.2 to 1.2% silicon 0.4 to 2.0% manganese 8 to 20% chrome 0.05 to 1.2% molybdenum 0.01 to 0.5% nickel as well as in detail side by side 0.5 to 2.0% copper 0.001 to 0.6% bismuth 0.002 to 0.10% vanadium 0.002 to 0.10% titanium 0.002 to 0.10% niobium 0.15 to 0.80% sulfur up to 0.05% aluminum up to 0.08% Nitrogen, Rest of iron.
  • the present invention contains chromium steel each within the above content limits 0.002 to 0.06% carbon 0.3 to 0.8% silicon 0.5 to 1.6% manganese 11 to 18% chrome 0.05 to 0.8% molybdenum 0.01 to 0.1% nickel 0.55 to 1.60% copper 0.002 to 0.22% bismuth 0.005 to 0.08% vanadium 0.005 to 0.08% titanium 0.005 to 0.08% niobium 0.15 to 0.65% Sulfur, Rest of iron.
  • the chrome steel according to the invention is suitable due to its good machinability as a material for the manufacture of precision devices and highly precise Micro components with low tool wear with micro bores and recesses, for example in the tenth or hundredth range of a millimeter, high surface quality and directional accuracy. For example, you can drill holes with a diameter Produce less than 1 mm in one step without running. Furthermore The steel has excellent polishability, especially when Electropolishing.
  • the chrome steel according to the invention is suitable, for example, as a material for writing tips on ballpoint pens.
  • Such nibs and the associated printheads require high corrosion resistance, Fine workability and uniformity of ink supply.
  • the writing head of a ballpoint pen in the front part from a holder for the writing ball, for example made of corundum and from several channels and holes for supplying the writing ink or paste.
  • Rear Part of the print head usually consists of a connection to a storage container, for example a metal or plastic cylinder for the writing paste or ink, which can also be under pressure.
  • the ink or paste is supplied to the ball using a pen centric fine bore channel with a diameter of less than 0.5 mm and several laterally symmetrically arranged recesses.
  • the centric Fine bore channel must be positioned so that the writing ball and the recesses arranged symmetrically to it exactly in the middle of the ball will be hit because the writing ball will only rotate is evenly wetted on all sides with ink or writing paste.
  • the nozzle blanks were then drilled centrally in an automatic drill using a hard metal drill with a diameter of 0.4 mm. When drilling, only a very small burr was created, which could be easily removed by electropolishing for twenty seconds while simultaneously rounding the edge of the hole, leaving a shiny surface.
  • the excellent quality of the nozzle surface due to the good machinability results in low wall friction and allows spinning with relatively low pressure, even with melt plastics high viscosity.
  • the blank was provided with six blind holes each with a diameter of 0.8 mm and a depth of 4.9 mm in order to produce a nozzle opening with a diameter of 85 ⁇ m in an automatic drilling machine. After cleaning in an ultrasonic bath and drying with hot air, melt holes with the specified diameter of 85 ⁇ m were made in the bottom of the blind holes using an Nd YAG laser. Such laser drilling leads to problems if the blind hole is not straight. No such problems were encountered when trying. In addition, there was no toxic metal fumes due to the absence of lead, selenium and tellurium in the test steel. The accuracy of the bore produced in this way allows further processing to straight, curved or star-shaped slots.
  • the straightness of the bores was determined for each bore diameter using a test wire whose diameter was approximately 10 ⁇ m smaller than the bore diameter and whose immersion depth E was determined as shown in FIG. 1.
  • Fig. 2 clearly shows the sudden improvement the susceptibility to burrs when testing with the steel according to the invention a ridge width of only 0.060 mm compared to a ridge width of 0.187 mm for the comparative steel according to FIG. 3.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Drilling Tools (AREA)
EP02019608A 2001-09-04 2002-09-03 Acier au chrome résistant à la corrosion et déformable à froid Expired - Lifetime EP1288323B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10143390 2001-09-04
DE10143390.5A DE10143390B4 (de) 2001-09-04 2001-09-04 Kaltverformbarer korrosionsbeständiger Chromstahl

Publications (2)

Publication Number Publication Date
EP1288323A1 true EP1288323A1 (fr) 2003-03-05
EP1288323B1 EP1288323B1 (fr) 2005-06-01

Family

ID=7697721

Family Applications (1)

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EP02019608A Expired - Lifetime EP1288323B1 (fr) 2001-09-04 2002-09-03 Acier au chrome résistant à la corrosion et déformable à froid

Country Status (4)

Country Link
US (1) US20030086810A1 (fr)
EP (1) EP1288323B1 (fr)
DE (1) DE10143390B4 (fr)
ES (1) ES2243634T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1586671A1 (fr) 2004-04-01 2005-10-19 Stahlwerk Ergste Westig GmbH Acier au chrome déformable à froid

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE528680C2 (sv) * 2004-06-30 2007-01-23 Sandvik Intellectual Property Ferritisk blyfri rostfri stållegering
DE102009038386A1 (de) * 2009-08-24 2011-03-03 Stahlwerk Ergste Gmbh Weichmagnetischer ferritischer Chromstahl
UA111115C2 (uk) 2012-04-02 2016-03-25 Ейкей Стіл Пропертіс, Інк. Рентабельна феритна нержавіюча сталь
CN103103458B (zh) * 2013-02-17 2015-07-01 武汉钢铁(集团)公司 高强度耐候钢及其制备方法
CN103194689B (zh) * 2013-03-28 2017-08-04 宝钢不锈钢有限公司 具备优良成形性和耐腐蚀性能的高强度铁素体不锈钢及其制造方法
JP6814724B2 (ja) * 2017-12-22 2021-01-20 大同特殊鋼株式会社 電磁弁
WO2022107757A1 (fr) * 2020-11-19 2022-05-27 日鉄ステンレス株式会社 Matériau de barre en acier inoxydable et composant électromagnétique
JP7761835B2 (ja) * 2022-08-19 2025-10-29 日本製鉄株式会社 フェライト系ステンレス鋼板

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362337A (en) * 1993-09-28 1994-11-08 Crs Holdings, Inc. Free-machining martensitic stainless steel
US5496515A (en) * 1994-05-31 1996-03-05 Ugine Savoie (Societe Anonyme) Ferritic stainless steel with improved machinability
JPH08193249A (ja) * 1994-03-19 1996-07-30 Sanyo Special Steel Co Ltd 被削性に優れたフェライト系およびマルテンサイト系ステンレス鋼
JPH1046292A (ja) * 1996-07-26 1998-02-17 Sanyo Special Steel Co Ltd 熱間加工性および耐食性に優れたフェライト系快削ステンレス鋼

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925063A (en) * 1972-09-18 1975-12-09 Daido Steel Co Ltd Electromagnetic stainless steel having excellent machinability
JPH0627303B2 (ja) * 1985-07-24 1994-04-13 愛知製鋼株式会社 冷間鍛造用軟磁性ステンレス鋼
JPH08929B2 (ja) * 1986-11-28 1996-01-10 新日本製鐵株式会社 耐応力腐食割れ性と耐炭酸ガス腐食性の優れたフエライト系ステンレス鋼の製造方法
JPH03180449A (ja) * 1989-12-11 1991-08-06 Daido Steel Co Ltd 冷間加工性，靭性，耐食性，被削性の優れたフェライト系快削ステンレス鋼およびその製造方法
JP3068216B2 (ja) * 1990-12-28 2000-07-24 東北特殊鋼株式会社 高冷鍛性電磁ステンレス鋼
JP3601749B2 (ja) * 1996-10-24 2004-12-15 大同特殊鋼株式会社 高強度、快削フェライト系ステンレス鋼

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362337A (en) * 1993-09-28 1994-11-08 Crs Holdings, Inc. Free-machining martensitic stainless steel
JPH08193249A (ja) * 1994-03-19 1996-07-30 Sanyo Special Steel Co Ltd 被削性に優れたフェライト系およびマルテンサイト系ステンレス鋼
US5496515A (en) * 1994-05-31 1996-03-05 Ugine Savoie (Societe Anonyme) Ferritic stainless steel with improved machinability
JPH1046292A (ja) * 1996-07-26 1998-02-17 Sanyo Special Steel Co Ltd 熱間加工性および耐食性に優れたフェライト系快削ステンレス鋼

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1586671A1 (fr) 2004-04-01 2005-10-19 Stahlwerk Ergste Westig GmbH Acier au chrome déformable à froid

Also Published As

Publication number Publication date
DE10143390A1 (de) 2003-03-27
ES2243634T3 (es) 2005-12-01
US20030086810A1 (en) 2003-05-08
EP1288323B1 (fr) 2005-06-01
DE10143390B4 (de) 2014-12-24

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