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EP2194155B1 - Alliage d'acier pour travail à chaud - Google Patents

Alliage d'acier pour travail à chaud Download PDF

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Publication number
EP2194155B1
EP2194155B1 EP09450215A EP09450215A EP2194155B1 EP 2194155 B1 EP2194155 B1 EP 2194155B1 EP 09450215 A EP09450215 A EP 09450215A EP 09450215 A EP09450215 A EP 09450215A EP 2194155 B1 EP2194155 B1 EP 2194155B1
Authority
EP
European Patent Office
Prior art keywords
hot
elements
steel alloy
nitrogen
silicon
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
EP09450215A
Other languages
German (de)
English (en)
Other versions
EP2194155A1 (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 SI200930014T priority Critical patent/SI2194155T1/sl
Priority to PL09450215T priority patent/PL2194155T3/pl
Publication of EP2194155A1 publication Critical patent/EP2194155A1/fr
Application granted granted Critical
Publication of EP2194155B1 publication Critical patent/EP2194155B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • 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

Definitions

  • the invention relates to a hot work steel alloy with high toughness and at the same time a high hardening depth or improved martensitic through hardenability in a thermal quenching of products such as die casting dies or extruded dies and the like.
  • a thermal tempering of a part for setting a high material hardness at service temperatures of the part up to 550 ° C and higher, essentially involves heating the material to a temperature at which it has a cubic face centered atomic structure or an austenitic structure, followed by forced cooling to obtain a Martensitge Stahl and a subsequent, optionally repeated tempering treatment at temperatures of mostly above 500 ° C.
  • the stresses formed in the material during cooling and microstructure are at least partially degraded in the material and, on the other hand, the material hardness is increased by carbide precipitations or a so-called secondary increase in hardness is achieved.
  • the properties of a material depend on its chemical composition and its microstructure set by a heat treatment, resulting in a certain property profile of a part.
  • the chemical composition of a material and the intensity of the cooling or the removal of heat from the surface during curing of the part determine the microstructure in the area of the surface and due to the reheating of the part inside the microstructure as a function of Distance to the sub-surface.
  • the respective local microstructure is decisive for the locally given material properties of the thermally tempered material.
  • Hot working materials for die-casting molds and the like are subject to increasing demands due to shortened press follow-up times and increased casting pressures due to increasingly economical production of the products. Furthermore, increasingly complex geometries of the mold cavities are provided so that summarily significantly increased total loads of the material are present. These overall stresses can cause tool failures due to stress cracking, fire cracking, coarse fracture, corrosion and erosion, requiring materials with high hardness and strength as well as high toughness and ductility. However, these required properties are dependent on the chemical composition of the alloy and the resulting tempering properties of the same.
  • the material no. 1.2343 is used for "highly stressed tools, dies and presses".
  • the above materials have a high hardening depth or a deep-reaching, thermal heat resistance to required hardness values between 50 and 55 HRC. However, their toughness properties are low, which can be detrimental to the performance characteristics of die casting molds.
  • the invention is now based on the object to provide a hot-work tool of the type mentioned, which forms a largely complete, martensitic microstructure at a forced cooling from the austenite even at low cooling, after which by a targeted tempering a high hardness and improved toughness of Material is achieved.
  • the advantage of the alloy composition according to the invention is essentially to be seen in the fact that the elements as a whole, in particular the elements silicon, molybdenum, vanadium and nitrogen are closely matched in terms of conversion kinetics, so that a desired strength and hardness with high toughness of the material in a thermal Compensation can be achieved with reduced cooling rate during curing.
  • a further substantial increase in the toughness properties of the tempered material can be achieved if the hot-work steel alloy has maximum concentrations of one or all elements in% by weight of Phosphorus (P) 0005 Sulfur (S) 0003 Nickel (Ni) 12:10 Tungsten (W) 12:10 Copper (Cu) 12:10 Cobalt (Co) 12:10 Titanium (Ti) 0008 Niobium (Nb) 12:03 Oxygen (O) 0003 Boron (B) 0001 Arsenic (As) 12:01 Tin (Sn) 0.0025 Antimony (Sb) 12:01 Zinc (Zn) 0001 Calcium (Ca) 0.0002 Magnesium (Mg) 0.0002 having.
  • the above elements can either form precipitates or compounds which are enriched in particular at the grain boundaries and thus reduce the toughness properties of the material abruptly from a concentration limit or they bring about grain boundaries, which act similarly unfavorable.
  • the hot-working steel alloy contains one or more of the alloying elements in% by weight.
  • Fig. 1 shows: notched impact values of the material after a thermal treatment as a function of the cooling parameters during the hardening treatment.
  • Cooling parameter [ ⁇ ] corresponds to the time [in sec.] For a cooling down from 800 ° C to 500 ° C broken by 100.
  • the materials no. 1.2343 with standard Si contents and no. 1.2367 have a lower toughness with a hardening hardness of 44 HRC, but have a considerable through hardenability, which is documented by only slightly decreasing toughness values depending on the cooling parameter.
  • an experimental alloy W 350 according to the invention shows slightly lower toughness values at room temperature in the state tempered to 44 HRC at high cooling rates or in the range of the cooling parameter ⁇ to 13 in comparison with the SO material No. 1.2343 (Si ⁇ 0.2% by weight); However, the viscosity of the material remains essentially unchanged at superior high values even with decreasing cooling rates or higher cooling parameters.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Contacts (AREA)

Claims (3)

  1. Alliage d'acier pour travail à chaud contenant les éléments de carbone (C), de silicium (Si), de manganèse (Mn), de chrome (Cr), de molybdène (Mo), de vanadium (V), d'azote (N) et des éléments d'impureté ainsi que de fer comme le reste, à condition que les éléments d'alliage comprennent les teneurs suivants en pourcentage en poids de carbone (C) 0,35 à 0,42 silicium (Si) 0,15 à 0,29 manganèse (Mn) 0,40 à 0,70 chrome (Cr) 4,70 à 5,45 molybdène (Mo) 1,55 à 1,95 vanadium (V) 0,40 à 0,75 azote (N) 0,011 à 0,016.
  2. Alliage d'acier pour travail à chaud selon la revendication 1, contenant les concentrations maximaux d'un ou de tous les éléments en pourcentage en poids de phosphore (P) 0,005 soufre (S) 0,003 nickel (Ni) 0,10 tungstène (W) 0,10 cuivre (Cu) 0,10 cobalt (Co) 0,10 titane (Ti) 0,008 niobium (Nb) 0,03 oxygène (O) 0,003 bore (B) 0,001 arsenic (As) 0,01 étain (Sn) 0,0025 antimoine (Sb) 0,01 zinc (Zn) 0,001 calcium (Ca) 0,0002 magnésium (Mg) 0,0002.
  3. Alliage d'acier pour travail à chaud selon la revendication 1 ou 2, contenant un ou plusieurs éléments d'alliage en pourcentage en poids de carbone (C) 0,37 à 0,40 silicium (Si) 0,16 à 0,28 de préférence 0,18 à 0,25 manganèse (Mn) 0,45 à 0,60 de préférence 0,50 à 0,58 chrome (Cr) 4,80 à 5,20 de préférence 4,90 à 5,10 molybdène (Mo) 1,50 à 1,90 de préférence 1,65 à 1,80 vanadium (V) 0,45 à 0,70 de préférence 0,52 à 0,60 azote (N) 0,012 à 0,015
    du fer (Fe) et des éléments d'impureté comme le reste.
EP09450215A 2008-11-20 2009-11-16 Alliage d'acier pour travail à chaud Active EP2194155B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200930014T SI2194155T1 (sl) 2008-11-20 2009-11-16 Jeklena legura za delo v vročem
PL09450215T PL2194155T3 (pl) 2008-11-20 2009-11-16 Stop ze stali na narzędzia do pracy na gorąco

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0181508A AT506790B1 (de) 2008-11-20 2008-11-20 Warmarbeitsstahl-legierung

Publications (2)

Publication Number Publication Date
EP2194155A1 EP2194155A1 (fr) 2010-06-09
EP2194155B1 true EP2194155B1 (fr) 2010-11-10

Family

ID=41402020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09450215A Active EP2194155B1 (fr) 2008-11-20 2009-11-16 Alliage d'acier pour travail à chaud

Country Status (11)

Country Link
US (2) US20100150772A1 (fr)
EP (1) EP2194155B1 (fr)
AT (2) AT506790B1 (fr)
AU (1) AU2009238307C1 (fr)
BR (1) BRPI0904501A2 (fr)
CA (1) CA2686071C (fr)
DE (1) DE502009000171D1 (fr)
ES (1) ES2353192T3 (fr)
PL (1) PL2194155T3 (fr)
SI (1) SI2194155T1 (fr)
ZA (1) ZA200908201B (fr)

Families Citing this family (6)

* 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
US10975460B2 (en) 2015-01-28 2021-04-13 Daido Steel Co., Ltd. Steel powder and mold using the same
SE539646C2 (en) 2015-12-22 2017-10-24 Uddeholms Ab Hot work tool steel
CN107400833A (zh) * 2017-08-30 2017-11-28 王延敏 一种钢结构升降系统制造工艺
US20210262071A1 (en) 2018-10-05 2021-08-26 Hitachi Metals, Ltd. Hot work tool steel and hot work tool
CN109821951B (zh) * 2018-12-06 2020-07-21 苏州普热斯勒先进成型技术有限公司 一种耐腐蚀热冲压零件的制备方法及装置

Family Cites Families (8)

* 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
US3791819A (en) * 1968-11-12 1974-02-12 Jones & Laughlin Steel Corp Production of stainless steels
AT403058B (de) * 1995-03-23 1997-11-25 Boehler Edelstahl Eisenbasislegierung zur verwendung bei erhöhter temperatur und werkzeug aus dieser legierung
JPH08269625A (ja) * 1995-03-31 1996-10-15 Sumitomo Metal Ind Ltd 高温強度と靭性に優れた熱間工具鋼
EP0939140B1 (fr) * 1998-02-27 2002-05-08 Böhler Edelstahl GmbH & Co KG. Acier pour utiliser à hautes températures
SE511758C2 (sv) * 1998-03-27 1999-11-22 Uddeholm Tooling Ab Stålmaterial för varmarbetsverktyg
AT410447B (de) * 2001-10-03 2003-04-25 Boehler Edelstahl Warmarbeitsstahlgegenstand
KR20120006091A (ko) * 2006-09-15 2012-01-17 히타치 긴조쿠 가부시키가이샤 인성 및 고온 강도가 우수한 열간 공구강 및 그의 제조 방법

Also Published As

Publication number Publication date
BRPI0904501A2 (pt) 2011-02-08
ATE487805T1 (de) 2010-11-15
ES2353192T3 (es) 2011-02-28
CA2686071C (fr) 2014-01-28
US20100150772A1 (en) 2010-06-17
ZA200908201B (en) 2011-02-23
DE502009000171D1 (de) 2010-12-23
AU2009238307C1 (en) 2014-03-13
SI2194155T1 (sl) 2011-01-31
PL2194155T3 (pl) 2011-04-29
US20150292067A1 (en) 2015-10-15
AU2009238307B2 (en) 2013-12-19
EP2194155A1 (fr) 2010-06-09
CA2686071A1 (fr) 2010-05-20
AU2009238307A1 (en) 2010-06-03
AT506790B1 (de) 2009-12-15
AT506790A4 (de) 2009-12-15

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