EP0890653B1 - Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce - Google Patents

Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce Download PDF

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Publication number
EP0890653B1
EP0890653B1 EP98400447A EP98400447A EP0890653B1 EP 0890653 B1 EP0890653 B1 EP 0890653B1 EP 98400447 A EP98400447 A EP 98400447A EP 98400447 A EP98400447 A EP 98400447A EP 0890653 B1 EP0890653 B1 EP 0890653B1
Authority
EP
European Patent Office
Prior art keywords
hrc
steel
jominy
carburized
carbonitrided
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.)
Expired - Lifetime
Application number
EP98400447A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0890653A1 (fr
Inventor
Claude Pichard
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.)
Ascometal SA
Original Assignee
Ascometal SA
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Publication date
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Application filed by Ascometal SA filed Critical Ascometal SA
Publication of EP0890653A1 publication Critical patent/EP0890653A1/fr
Application granted granted 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

Definitions

  • the present invention relates to the manufacture of steel parts including less part of the surface is hardened by carburizing or carbonitriding, followed oil or gas quenching.
  • the object of the present invention is to remedy this drawback by proposing a means for manufacturing steel parts of which at least part of the surface is hardened by carburizing or carbonitriding, especially at high temperature.
  • the subject of the invention is a method for manufacturing a steel mechanical part according to which a blank for a steel part is produced and a carburizing or carbonitriding treatment is carried out, in particular at at least high temperature. part of the surface of the blank of the part.
  • the chemical composition of the steel of which the part is made up comprises, by weight: 0.2% ⁇ C ⁇ 0.26% 0.05% ⁇ If ⁇ 0.5% 1% ⁇ Mn ⁇ 1.6%.
  • the chemical composition of the steel is adjusted so that the JOMINY curve of the steel is such that: 45 HRC ⁇ J 3 ⁇ 50 HRC 39 HRC ⁇ J 11 ⁇ 47 HRC 31 HRC ⁇ J 25 ⁇ 40 HRC and so that the average values J 3m , J 11m , J 15m and J 25m of five JOMINY tests are such that:
  • the JOMINY curve is such that at least one of the following conditions is satisfied: 10 x (J 7m - J 11m ) / (4 x (J 15m - J 25m )) ⁇ 2.15 and: 10 x (J 7m - J 15m ) / (8 x (J 15m - J 25m )) ⁇ 2
  • the chemical composition of the steel is such that: 0.21% ⁇ C ⁇ 0.25% 0.1% ⁇ If ⁇ 0.45% 1.1% ⁇ Mn ⁇ 1.5% 0.9% ⁇ Cr ⁇ 1.4% 0.09% ⁇ Mo ⁇ 0.26% 0% ⁇ Ni ⁇ 0.6% 0.005% ⁇ Al ⁇ 0.05% 0% ⁇ Cu ⁇ 0.3% 0% ⁇ Ti ⁇ 0.05% P ⁇ 0.03%
  • the nitrogen content of the steel is between 0.004% and 0.02%.
  • the invention also relates to a case hardening steel whose chemical composition is that which has just been indicated; this case hardening steel having a JOMINY curve such that: 45 HRC ⁇ J 3 ⁇ 50 HRC 39 HRC ⁇ J 11 ⁇ 47 HRC 31 HRC ⁇ J 25 ⁇ 40 HRC the mean values J 3m , J 11m , J 15m and J 25m of five JOMINY tests being such that:
  • the mean values J 7m , J 11m , J 15m and J 25m of five JOMINY tests are such that at least one of the following conditions is satisfied: 10 x (J 7m - J 11m ) / (4 x (J 15m - J 25m )) ⁇ 2.15 and: 10 x (J 7m - J 15
  • the steel may also contain up to 0.02% tellurium, up to 0.04% of selenium, up to 0.07% lead, up to 0.005% calcium, to improve machinability.
  • the rest of the composition is iron and impurities resulting from the development
  • the chemical composition is adjusted so that the JOMINY curve of the steel is such that: 45 HRC ⁇ J 3 ⁇ 50 HRC 39 HRC ⁇ J 11 ⁇ 47 HRC 31 HRC ⁇ J 25 ⁇ 40 HRC and so that the average values J 3m , J 7m , J 11m , J 15m and J 25m of five JOMINY tests are such that:
  • the JOMINY curve is a curve which characterizes the hardenability of the steel. It is obtained by measuring the hardness along a generator of a cylindrical specimen quenched by a jet of water spraying one of its ends. The hardness measured at a distance of x mm from the sprinkled end is called J x . This test is well known to those skilled in the art. However, it has the characteristic of being naturally fairly dispersed.
  • the shape of the JOMINY curve is characterized, here, on the one hand by ranges of value for the points J 3 , J 11 and J 25 , and by the relation:
  • ⁇ 2.5 HRC which involves the means of five different tests, carried out with the same steel. More precisely, 5 identical tests are carried out successively; for each test, we measure at least the values of J 3 , J 7 , J 11 , J 15 and J 25 , we thus obtain five values for J 3 , J 7 , J 11 , J 15 and J 25 , and we calculate for each point J x , the average J xm of the five values.
  • the vertical bars are the symbol known in itself of the absolute value.
  • the relation itself combined with the relation J 3m -J 15m ⁇ 9 HRC or ⁇ 8 HRC, expresses that the JOMINY curve does not show any marked inflection.
  • the desired shape for the JOMINY curve can be refined by requiring that it satisfy at least one of the following relationships: 10 x (J 7m - J 11m ) / (4 x (J 15m - J 25m )) ⁇ 2.15 and: 10 x (J 7m - J 15m ) / (8 x (J 15m - J 25m )) ⁇ 2
  • the copper content remains below 0.3%, the sulfur content is preferably between 0.02% and 0.1%, and it is better that it remains less than 0.09%, the aluminum content is between 0.003% and 0.06%, and it is preferable that it is between 0.005% and 0.05%.
  • the steel may also contain one or more elements taken from tellurium, selenium, lead and calcium.
  • a part according to the invention it is manufactured with a steel according to the invention a blank for a part which is cemented or carbonitrided to high temperature and soak in oil or gas, the oil can be cold, warm or hot.
  • the workpiece blank can be produced, for example, by forging and by machining.
  • parts were produced with six steels according to the invention, the chemical compositions of which were: VS mn Yes S P Or Cr MB Cu al AT 0.23 1.25 0.27 0,028 0,018 0.2 1.15 0.1 0.14 0,028 B 0.24 1.4 0.4 0.05 0.02 0.25 1.0 0.24 0.25 0.04 VS 0.21 1.35 0.15 0.07 0,025 0.35 1.25 0.18 0.2 0.01 D 0.21 1.27 0.25 0.03 0.02 0.21 1.12 0.2 0.14 0.005 E 0.23 1.27 0.27 0.031 0.014 0.197 1.1 0.214 0,137 0.016 F 0.23 1.10 0.25 0.03 0,015 0.15 1.3 0.15 0.12 0.016
  • case hardening After case hardening at 995 ° C for 10 hours and quenching in warm oil at 98 ° C, the parts did not show deformations requiring machining additional. In addition, case hardening was characterized by a content of 0.94% carbon 0.1 mm below the surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)
EP98400447A 1997-07-10 1998-02-25 Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce Expired - Lifetime EP0890653B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9708770 1997-07-10
FR9708770A FR2765890B1 (fr) 1997-07-10 1997-07-10 Procede de fabrication d'une piece mecanique en acier cementee ou carbonitruree et acier pour la fabrication de cette piece

Publications (2)

Publication Number Publication Date
EP0890653A1 EP0890653A1 (fr) 1999-01-13
EP0890653B1 true EP0890653B1 (fr) 2003-08-13

Family

ID=9509091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98400447A Expired - Lifetime EP0890653B1 (fr) 1997-07-10 1998-02-25 Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce

Country Status (24)

Country Link
US (1) US6090225A (ja)
EP (1) EP0890653B1 (ja)
JP (1) JP3656706B2 (ja)
CN (1) CN1079446C (ja)
AR (1) AR013198A1 (ja)
AT (1) ATE247179T1 (ja)
AU (1) AU744729B2 (ja)
BR (1) BR9802358A (ja)
CA (1) CA2243101C (ja)
CZ (1) CZ297683B6 (ja)
DE (2) DE890653T1 (ja)
DK (1) DK0890653T3 (ja)
ES (1) ES2126546T3 (ja)
FR (1) FR2765890B1 (ja)
HU (1) HUP9801540A1 (ja)
PL (1) PL190892B1 (ja)
PT (1) PT890653E (ja)
RO (1) RO118457B1 (ja)
RU (1) RU2201993C2 (ja)
SI (1) SI9800193A (ja)
TR (1) TR199801347A3 (ja)
TW (1) TW460593B (ja)
UA (1) UA58499C2 (ja)
ZA (1) ZA986061B (ja)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167561A3 (en) * 2000-06-28 2009-03-04 Mitsubishi Steel Muroran Inc. Carburizing and carbonitriding steel
JP2003148294A (ja) * 2001-11-12 2003-05-21 Hitachi Ltd 燃料ポンプ及び筒内噴射エンジン
DE10315416A1 (de) * 2002-06-27 2004-01-22 Ina-Schaeffler Kg Lagefixierung eines Bolzens
JP2005273000A (ja) * 2004-02-26 2005-10-06 Sanyo Special Steel Co Ltd 被削性に優れた機械構造用鋼
FR2868083B1 (fr) * 2004-03-24 2006-07-21 Ascometal Sa Acier pour pieces mecaniques, procede de fabrication de pieces mecaniques l'utilisant et pieces mecaniques ainsi realisees
JP5121123B2 (ja) * 2005-03-14 2013-01-16 山陽特殊製鋼株式会社 耐粗粒化特性に優れた高温浸炭用鋼及びその製法並びに高温浸炭用素形品およびその浸炭焼入れ方法
WO2006114453A1 (es) 2005-04-26 2006-11-02 Sidenor Investigacion Y Desarrollo, S.A. Acero de cementación o carbonitruración y procedimiento de fabricación de piezas a partir de ese acero
DE102005023952B9 (de) * 2005-05-20 2007-07-26 Carl Aug. Picard Gmbh & Co. Kg Sicherheitspanzerung zum Schutz gegen Beschuss sowie Verfahren zu ihrer Herstellung
US8580050B2 (en) * 2005-08-24 2013-11-12 Daido Steel Co., Ltd. Carburized machine parts
DE102007041519A1 (de) 2007-08-31 2009-03-05 Mahle International Gmbh Zylinderlaufbuchse und Verfahren zu ihrer Herstellung
FR2935988B1 (fr) * 2008-09-12 2010-10-08 Ascometal Sa Acier, notamment pour roulements et pieces mecaniques aptes a la cementation ou a la carbonitruration, et pieces realisees avec cet acier.
JP5241455B2 (ja) * 2008-12-02 2013-07-17 新日鐵住金株式会社 浸炭窒化部材および浸炭窒化部材の製造方法
US20120018063A1 (en) * 2009-04-06 2012-01-26 Masayuki Hashimura Case-hardened steel superiorin cold workability, machinability, and fatigue characteristics after carburized quenching and method of production of same
CN101892450B (zh) * 2010-05-11 2012-07-04 青岛征和工业有限公司 发动机齿形链的销轴氮碳共渗处理方法
FR2978969B1 (fr) 2011-08-09 2013-09-13 Ascometal Sa Acier pour la fabrication de pieces cementees, piece cementee realisee avec cet acier et son procede de fabrication
DE102011054840A1 (de) * 2011-10-26 2013-05-02 Rud Ketten Rieger & Dietz Gmbh U. Co. Kg Härtbarer Stahl für Hebe-, Anschlag-, Spann- und/oder Zurrmittel der Güteklasse 8 und darüber, Bauelement der Hebe-, Anschlag-, Spann- und/oder Zurrtechnik sowie Verfahren zur Herstellung eines solchen Bauelements
JP6237277B2 (ja) 2014-01-30 2017-11-29 大同特殊鋼株式会社 肌焼鋼及びこれを用いた浸炭部品
JP6265048B2 (ja) * 2014-05-26 2018-01-24 新日鐵住金株式会社 肌焼鋼
CN107604253A (zh) * 2017-08-30 2018-01-19 东风商用车有限公司 一种高淬透性Mn‑Cr系列渗碳钢
RU2704049C1 (ru) * 2018-10-03 2019-10-23 Общество с ограниченной ответственностью Научно-производственное предприятие "БУРИНТЕХ" (ООО НПП "БУРИНТЕХ") Долотная сталь

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6191348A (ja) * 1984-10-08 1986-05-09 Kobe Steel Ltd 高強度非調質圧延棒鋼用鋳片
JPS62214157A (ja) * 1986-03-14 1987-09-19 Kobe Steel Ltd 焼入れ性を保証した鋼材の製造方法
JPS62214158A (ja) * 1986-03-14 1987-09-19 Kobe Steel Ltd ジヨミニ−焼入れ端硬さを保証したＣｒ鋼材の製造方法
JPS63270444A (ja) * 1986-12-16 1988-11-08 Kawasaki Steel Corp 耐サワ−性に優れたラインパイプ用鋼
JPH0830243B2 (ja) * 1994-05-06 1996-03-27 株式会社神戸製鋼所 低歪浸炭用鋼
JP3094856B2 (ja) * 1995-08-11 2000-10-03 株式会社神戸製鋼所 高強度高靭性肌焼き用鋼

Also Published As

Publication number Publication date
AU744729B2 (en) 2002-02-28
CA2243101A1 (fr) 1999-01-10
AU7394398A (en) 1999-01-21
FR2765890A1 (fr) 1999-01-15
PT890653E (pt) 2003-12-31
ES2126546T1 (es) 1999-04-01
HU9801540D0 (en) 1998-09-28
PL190892B1 (pl) 2006-02-28
RU2201993C2 (ru) 2003-04-10
CA2243101C (fr) 2009-03-24
TR199801347A2 (xx) 1999-10-21
CZ297683B6 (cs) 2007-03-07
UA58499C2 (uk) 2003-08-15
DE890653T1 (de) 1999-06-02
ATE247179T1 (de) 2003-08-15
PL327388A1 (en) 1999-01-18
BR9802358A (pt) 2000-10-17
AR013198A1 (es) 2000-12-13
DE69817098D1 (de) 2003-09-18
RO118457B1 (ro) 2003-05-30
ES2126546T3 (es) 2004-05-01
ZA986061B (en) 1999-02-01
CN1211632A (zh) 1999-03-24
HUP9801540A1 (hu) 1999-05-28
CZ213898A3 (cs) 1999-01-13
TR199801347A3 (tr) 1999-10-21
FR2765890B1 (fr) 1999-08-20
TW460593B (en) 2001-10-21
DE69817098T2 (de) 2004-04-01
JP3656706B2 (ja) 2005-06-08
US6090225A (en) 2000-07-18
SI9800193A (sl) 1999-04-30
DK0890653T3 (da) 2003-12-01
JPH1171613A (ja) 1999-03-16
EP0890653A1 (fr) 1999-01-13
CN1079446C (zh) 2002-02-20

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