EP0401726A1 - Procédé pour augmenter la résistance d'un acier durcissable par traitement thermique et utilisation de l'acier obtenu - Google Patents

Procédé pour augmenter la résistance d'un acier durcissable par traitement thermique et utilisation de l'acier obtenu Download PDF

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Publication number
EP0401726A1
EP0401726A1 EP90110560A EP90110560A EP0401726A1 EP 0401726 A1 EP0401726 A1 EP 0401726A1 EP 90110560 A EP90110560 A EP 90110560A EP 90110560 A EP90110560 A EP 90110560A EP 0401726 A1 EP0401726 A1 EP 0401726A1
Authority
EP
European Patent Office
Prior art keywords
strength
tempering
steel
relaxation
blank
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
EP90110560A
Other languages
German (de)
English (en)
Other versions
EP0401726B1 (fr
Inventor
Peter Scharf
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0401726A1 publication Critical patent/EP0401726A1/fr
Application granted granted Critical
Publication of EP0401726B1 publication Critical patent/EP0401726B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/16—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for explosive shells
    • 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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening

Definitions

  • the invention relates to a method according to the preamble of claim 1 and the use of a steel treated in this way according to claim 3.
  • the invention is based on the object of specifying a heat treatment process for increasing its strength for a commercially available, standardized and inexpensive tempering steel in such a way that the durability of the high-strength special steels mentioned is achieved; so that an inexpensive raw material is available for the forged metal blank, which can be subjected to mechanical processing into an extremely accurate and mechanically highly stressable submunition shell.
  • the peculiarity of the heat treatment process according to the invention which brings about the surprising increase in strength of a tempering steel which is not offered at all for such stresses, is, according to the solution according to the invention, in that after staged preheating (with the holding time on the temperature levels is not critical if it is only ensured that the blank has reached the specified temperature through and through at every temperature level and after austenitizing and quenching, contrary to the usual tempering treatment of tempered steels at about 500 ° C (to break down martensite and To have iron carbide excreted), now only r To relax, as is the case with tool steels, at correspondingly lower temperatures in order to reduce the tetragonal distortions of the martensite that occurred during the previous hardening.
  • the treatment according to the invention increases the previously offered tensile strength of an inexpensive, commercially available tempering steel from the offered upper limit at 1450 N / mm2 to the order of magnitude of 1800 N / mm2 and more, i.e. in the order of strength of the expensive high-strength special steels such as X 41 CrMoV 51.
  • the alloy components should lie within certain standardized lower and upper limits, as indicated in the table below.
  • the strength is preferably tempered at a tempering temperature of around 220 ° C.
  • a metal blank made of 30 CrNiMo 8 according to DIN 17 200 is preferably used.
  • the individual alloy components are - as can be seen from the table below - within certain lower and upper limits:
  • a metal article produced according to the methods described above can advantageously be used for submunition casings of search fuse ammunition.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
EP90110560A 1989-06-08 1990-06-05 Procédé pour augmenter la résistance d'un acier durcissable par traitement thermique et utilisation de l'acier obtenu Expired - Lifetime EP0401726B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3918700 1989-06-08
DE3918700A DE3918700A1 (de) 1989-06-08 1989-06-08 Verfahren zur festigkeitssteigerung von verguetungsstahl und verwendung eines so behandelten verguetungsstahles

Publications (2)

Publication Number Publication Date
EP0401726A1 true EP0401726A1 (fr) 1990-12-12
EP0401726B1 EP0401726B1 (fr) 1993-09-08

Family

ID=6382342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110560A Expired - Lifetime EP0401726B1 (fr) 1989-06-08 1990-06-05 Procédé pour augmenter la résistance d'un acier durcissable par traitement thermique et utilisation de l'acier obtenu

Country Status (2)

Country Link
EP (1) EP0401726B1 (fr)
DE (2) DE3918700A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2916371A1 (fr) * 2007-05-24 2008-11-28 Fwu Kuang Entpr Co Ltd Procede de preparation de pieces forgees ayant une resistance a la traction et un allongement excellents a partir de fils mamchine en acier
WO2010105858A1 (fr) 2009-03-17 2010-09-23 Paul Scherrer Institut Procédé d'évaluation de données de modèle de rayonnement dans des applications de rayonnement par faisceau de particules
CN112899595A (zh) * 2021-01-08 2021-06-04 安徽品志合金新材料有限公司 一种黄铜合金铜棒加工用的预热设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007038662A1 (de) 2007-08-15 2009-02-19 Rheinmetall Waffe Munition Gmbh Fertigungsverfahren und Stahl für schwere Munitionshüllen
CN104846157B (zh) * 2015-03-31 2017-02-01 常州天山重工机械有限公司 一种高精高速重载齿轮盐浴淬火的回火工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875109A (en) * 1954-08-25 1959-02-24 Eimco Corp Method for the isothermal treatment of alloys after casting
FR2305272A1 (fr) * 1975-03-25 1976-10-22 Ntn Toyo Bearing Co Ltd Procede de travail de pieces a usiner en acier comprenant un usinage au cours du refroidissement de trempe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875109A (en) * 1954-08-25 1959-02-24 Eimco Corp Method for the isothermal treatment of alloys after casting
FR2305272A1 (fr) * 1975-03-25 1976-10-22 Ntn Toyo Bearing Co Ltd Procede de travail de pieces a usiner en acier comprenant un usinage au cours du refroidissement de trempe

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DRAHT, Band 34, Nr. 7, Juli 1983, Seiten 367-369, Bamberg, DE; H. KLOSE: "Wärmebehandlung von Werkzeugstählen" *
TECHNISCHE RUNDSCHAU, Band 66, Nr. 45, 29. Oktober 1974, Seiten 13-15; F. BIRZER: "Wärmebehandlung für Feinschnitte" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2916371A1 (fr) * 2007-05-24 2008-11-28 Fwu Kuang Entpr Co Ltd Procede de preparation de pieces forgees ayant une resistance a la traction et un allongement excellents a partir de fils mamchine en acier
WO2010105858A1 (fr) 2009-03-17 2010-09-23 Paul Scherrer Institut Procédé d'évaluation de données de modèle de rayonnement dans des applications de rayonnement par faisceau de particules
CN112899595A (zh) * 2021-01-08 2021-06-04 安徽品志合金新材料有限公司 一种黄铜合金铜棒加工用的预热设备

Also Published As

Publication number Publication date
EP0401726B1 (fr) 1993-09-08
DE59002614D1 (de) 1993-10-14
DE3918700C2 (fr) 1991-03-21
DE3918700A1 (de) 1990-12-13

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