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EP2196553B1 - Alliage d'acier pour composants de machines - Google Patents

Alliage d'acier pour composants de machines Download PDF

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Publication number
EP2196553B1
EP2196553B1 EP09450220.0A EP09450220A EP2196553B1 EP 2196553 B1 EP2196553 B1 EP 2196553B1 EP 09450220 A EP09450220 A EP 09450220A EP 2196553 B1 EP2196553 B1 EP 2196553B1
Authority
EP
European Patent Office
Prior art keywords
max
machine components
steel alloy
mpa
components according
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.)
Active
Application number
EP09450220.0A
Other languages
German (de)
English (en)
Other versions
EP2196553A1 (fr
Inventor
Ingo Siller
Herbert Schweiger
Ziya Devrim Caliskanoglu
Silvia Zinner
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.)
Voestalpine Boehler Edelstahl GmbH and Co KG
Original Assignee
Boehler Edelstahl GmbH and Co KG
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 Boehler Edelstahl GmbH and Co KG filed Critical Boehler Edelstahl GmbH and Co KG
Priority to SI200931096T priority Critical patent/SI2196553T1/sl
Priority to PL09450220T priority patent/PL2196553T3/pl
Publication of EP2196553A1 publication Critical patent/EP2196553A1/fr
Application granted granted Critical
Publication of EP2196553B1 publication Critical patent/EP2196553B1/fr
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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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium

Definitions

  • the invention relates to machine components or components with a tensile strength greater than 2000 [MPa] for varying mechanical loads up to a temperature of 160 ° C, formed from a thermally tempered steel alloy.
  • the invention relates to engine and / or drive components of vehicles.
  • Machine components with varying mechanical stress are increasingly loaded in modern technology to the limits of the respective material resistance. In particular, this is true for components in vehicles because the weight reductions achieved thereby are also useful for fuel savings and the like.
  • Accompanying and impurity elements may be the cause of reduced long-term properties, because these elements are enriched at the grain boundaries of the structure or can form compounds. It has been found that the material properties are only slightly impaired in the case of long-term alternating load if the highest contents of one or more of the above-mentioned accompanying or impurity elements have the limits specified above.
  • a homogeneous distribution and a hardness of greater than 54 HRC, in particular greater than 55 HRC, formed free of peak values can be set, which increases the fatigue resistance.
  • the machine components or the component have (has) a modulus of elasticity of the material greater than 200,000 MPa, these have or have this in the elastic region of the mechanical stresses under alternating load lower strain and compression values, whereby a longer life is achieved or better fatigue values are given.
  • the quenched steel alloy or the material has as a machine component in vehicle construction and especially as a motor and / or drive and / or spring part.
  • Such chemically combined materials are, as is familiar to those skilled in the art, hot working steels for use temperatures up to 500 ° C. Surprisingly, it has been found that these alloys in the thermally tempered state are advantageously applicable to machine components or components with alternating, mechanical stress at low temperatures, if a chemical composition is present within narrow limits of the alloying elements according to the invention.
  • High purity steel alloys according to the invention designated W366, had been made into deformed and thermally tempered samples which were tested in investigations to determine the material characteristics were.
  • Fig. 2 shows in one, as in Fig. 1 4, the bar graph shows the 0.2% proof strength of the materials, with the values of the samples of components having a composition W366 being of the highest level.
  • Fig. 3 indicates that both the elongation at break and the W366 fracture throat values are significantly higher as compared to 300 M and 300 M "Improved", which reveals significant advantages in its use for machine components with varying mechanical stress.
  • the modulus of elasticity of material W366 is, as out Fig. 4 can be seen to be higher in comparison with the prior art materials, so that in heavy use there are less elastic deformations under mechanical stress of the material, whereby fatigue failure of a part made of W366 is substantially reduced.
  • Fig. 5 shows the fatigue behavior of the thermally tempered samples from the investigated alloys in comparison.
  • Fig. 6 the four-point bending arrangement is shown schematically.
  • the loading of the samples was carried out on rolls with a diameter of 5mm.
  • the distance between the rollers was 15mm at the top and 30mm at the bottom.
  • the marginal fiber stress ⁇ b was determined assuming a linear elastic stress distribution according to the equation.
  • M b x 'x F / 2
  • W b wxh 2/6
  • Fig. 5 are clearly the advantages in terms of improved Fatigue behavior of machine components or components according to the invention can be seen, wherein the value range "pass level" indicates the voltage amplitude up to which at infinity load cycle no breakage of the sample occurs.
  • the steel alloy according to the invention was doped with these elements with different concentrations and quenched samples were investigated therefrom.
  • the results of the tests and the resulting limit values are given below.
  • Nitrogen in particular with alloying elements as well as titanium and oxygen, can form sharp-edged nitrides, which by means of increased strength cause voltage peaks in the micro range and thus crack initiation.
  • the upper limit values found are 0.003 wt% N and 0.005 wt% Ti.
  • Nickel, copper and cobalt in low concentrations are storage elements in the crystal formation of the alloy, but should be due to a detrimental effect of lattice defects on the long-term properties of the material contents not exceed 0.1 wt .-%.
  • Tin is due to the extremely low solubility in iron-based materials as a grain boundary occupying element to see and acts from a concentration of 0.005 wt .-% extremely negative on the fatigue and especially toughness properties of a component with alternating mechanical stress.

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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 Articles (AREA)
  • Heat Treatment Of Steel (AREA)

Claims (5)

  1. Composants de machine ou éléments de construction avec une résistance à la traction supérieure à 2000 [MPa] pour des charges mécaniques alternées jusqu'à une température de 160 °C au maximum, formés à partir dun alliage d'acier soumis à raffinage thermique, comprenant, en % en poids : Carbone (C) 0,48 à 0,55 Silicium (Si) 0,18 à 0,25 Manganèse (Mn) 0,35 à 0,45 Chrome (Cr) 4,4 à 46 Molybdène (Mo) 2,9 à 3,1 Vanadium (V) 0,72 à 0,77
    ainsi qu'un ou plusieurs des éléments d'accompagnement ou contaminants suivants: Phosphore (P) max. 0,005 Soufre (S) max. 0,001 Nickel (Ni) max. 0,1 Cuivre (Cu) max. 0,1 Titane (Ti) max. 0,1 Aluminium (Al) max. 0,01 Azote (N) max. 0,003 Oxygène (O) max. 0,002 Calcium (Ca) max. 0,001 Magnésium (Mg) max. 0,001 Etain (Sn) max. 0,005
    le reste étant formé de Fer (Fe) ou d'impuretés.
  2. Composants de machine selon la revendication 1, avec une dureté obtenue par raffinement thermique, supérieure à 54 [HRC], notamment supérieure à 55 [HRC].
  3. Composants de machine selon les revendications 1 ou 2, avec un degré de pureté de l'alliage d'acier inférieur/égal à D/0,5/FIN 1 (inclusions de type A, B, C absentes), selon ASTM E 45 (surface de mesure 160 mm2).
  4. Composants de machine selon une des revendications 1 à 3, avec un module d'élasticité E = supérieur à 200.000 MPa, notamment supérieur à 205.000 MPa.
  5. Composants de machine selon une des revendications 1 à 4, utilisés dans la construction de véhicules, notamment comme élément d'un moteur et/ou d'entraînement et/ou d'un ressort.
EP09450220.0A 2008-12-05 2009-11-23 Alliage d'acier pour composants de machines Active EP2196553B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200931096T SI2196553T1 (sl) 2008-12-05 2009-11-23 Legirano jeklo za strojne komponente
PL09450220T PL2196553T3 (pl) 2008-12-05 2009-11-23 Stop stali dla części składowych maszyn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0190408A AT507597B1 (de) 2008-12-05 2008-12-05 Stahllegierung für maschinenkomponenten

Publications (2)

Publication Number Publication Date
EP2196553A1 EP2196553A1 (fr) 2010-06-16
EP2196553B1 true EP2196553B1 (fr) 2014-10-08

Family

ID=41818431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09450220.0A Active EP2196553B1 (fr) 2008-12-05 2009-11-23 Alliage d'acier pour composants de machines

Country Status (10)

Country Link
US (1) US9328405B2 (fr)
EP (1) EP2196553B1 (fr)
AT (1) AT507597B1 (fr)
AU (1) AU2009240807B2 (fr)
BR (1) BRPI0905064A2 (fr)
CA (1) CA2686594C (fr)
ES (1) ES2526865T3 (fr)
PL (1) PL2196553T3 (fr)
SI (1) SI2196553T1 (fr)
ZA (1) ZA200908581B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017116367A1 (fr) 2015-12-31 2017-07-06 Ataturk Universitesi Bilimsel Arastirma Projeleri Birimi Superalliage empêchant les fuites de rayonnements
EP3050986B1 (fr) 2013-09-27 2019-07-31 Hitachi Metals, Ltd. Acier pour outil à vitesse élevée et procédé de production de ce dernier

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507215B1 (de) * 2009-01-14 2010-03-15 Boehler Edelstahl Gmbh & Co Kg Verschleissbeständiger werkstoff
US8513020B2 (en) * 2009-12-08 2013-08-20 National Oilwell Varco, L.P. Corrosion testing apparatus and methods
CN102445486A (zh) * 2011-09-14 2012-05-09 中国航空工业集团公司北京航空材料研究院 一种测定软磁、弹性及高弹性合金中钴元素的分析方法
US20130284319A1 (en) * 2012-04-27 2013-10-31 Paul M. Novotny High Strength, High Toughness Steel Alloy

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893902A (en) * 1959-02-04 1959-07-07 Vanadium Alloys Steel Co Heat treatment of steel
GB981288A (en) * 1961-02-13 1965-01-20 Vanadium Alloys Steel Co Alloy steels
JP3257649B2 (ja) * 1993-05-13 2002-02-18 日立金属株式会社 高靭性高速度鋼部材およびその製造方法
JPH10121201A (ja) 1996-10-14 1998-05-12 Kobe Steel Ltd 耐遅れ破壊性に優れた高強度ばね
JP3748203B2 (ja) 2000-10-18 2006-02-22 山陽特殊製鋼株式会社 転動部品用鋼および転動部品
AT410447B (de) 2001-10-03 2003-04-25 Boehler Edelstahl Warmarbeitsstahlgegenstand
JP2004169177A (ja) 2002-11-06 2004-06-17 Daido Steel Co Ltd 合金工具鋼及びその製造方法、並びにそれを用いた金型

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3050986B1 (fr) 2013-09-27 2019-07-31 Hitachi Metals, Ltd. Acier pour outil à vitesse élevée et procédé de production de ce dernier
WO2017116367A1 (fr) 2015-12-31 2017-07-06 Ataturk Universitesi Bilimsel Arastirma Projeleri Birimi Superalliage empêchant les fuites de rayonnements

Also Published As

Publication number Publication date
CA2686594A1 (fr) 2010-06-05
ES2526865T3 (es) 2015-01-16
SI2196553T1 (sl) 2015-01-30
AT507597A1 (de) 2010-06-15
AT507597B1 (de) 2010-09-15
EP2196553A1 (fr) 2010-06-16
US9328405B2 (en) 2016-05-03
US20100147423A1 (en) 2010-06-17
AU2009240807B2 (en) 2011-05-19
PL2196553T3 (pl) 2015-03-31
AU2009240807A1 (en) 2010-06-24
CA2686594C (fr) 2016-09-20
BRPI0905064A2 (pt) 2011-02-08
ZA200908581B (en) 2010-08-25

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