FR2343051A1 - Liquid quenching large steel parts - using pressurised gas above liquid bath to increase cooling rate - Google Patents

Liquid quenching large steel parts - using pressurised gas above liquid bath to increase cooling rate

Info

Publication number
FR2343051A1
FR2343051A1 FR7706266A FR7706266A FR2343051A1 FR 2343051 A1 FR2343051 A1 FR 2343051A1 FR 7706266 A FR7706266 A FR 7706266A FR 7706266 A FR7706266 A FR 7706266A FR 2343051 A1 FR2343051 A1 FR 2343051A1
Authority
FR
France
Prior art keywords
pref
bars
press
cooling rate
steel parts
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.)
Withdrawn
Application number
FR7706266A
Other languages
French (fr)
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.)
Ipsen International GmbH
Original Assignee
Ipsen International GmbH
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 Ipsen International GmbH filed Critical Ipsen International GmbH
Publication of FR2343051A1 publication Critical patent/FR2343051A1/en
Withdrawn legal-status Critical Current

Links

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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum

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)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

Metal parts are heated to a specified temp. and then quenched in a liq., where the surface of the liq. is subjected to a pressure above atmos. press., pref. up to 2.5 bars, esp. using a closed system and 1.2-2.0 bars. The pref. process consists of quenching parts made of ball bearing steel in oil which is stirred and subjected to a surface press. of 1.2 bars, esp. raising the press. so the oil remains below its b.pt. The pref. plant consists of a vacuum furnace with a quenching chamber fed with pressurised inert gas and fitted with a safety valve; the quenching medium is pref. provided with stirrers. Used e.g. in the hardening of 300 kg ball bearing races. The cooling speed of the steel is increased (e.g. by 30%) so that variations in hardening efficiency are completely eliminated.
FR7706266A 1976-03-04 1977-03-03 Liquid quenching large steel parts - using pressurised gas above liquid bath to increase cooling rate Withdrawn FR2343051A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762608850 DE2608850A1 (en) 1976-03-04 1976-03-04 PROCEDURE FOR QUENCHING METAL PARTS AND QUENCHING FURNACES

Publications (1)

Publication Number Publication Date
FR2343051A1 true FR2343051A1 (en) 1977-09-30

Family

ID=5971457

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7706266A Withdrawn FR2343051A1 (en) 1976-03-04 1977-03-03 Liquid quenching large steel parts - using pressurised gas above liquid bath to increase cooling rate

Country Status (2)

Country Link
DE (1) DE2608850A1 (en)
FR (1) FR2343051A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4698921B2 (en) * 2002-01-22 2011-06-08 出光興産株式会社 Quenching method
DE202008010215U1 (en) 2008-07-31 2008-10-09 Ipsen International Gmbh Industrial furnace as multi-chamber vacuum furnace, especially two-chamber vacuum furnace for heat treatment of batches of metal workpieces
CN102808071A (en) * 2012-08-30 2012-12-05 苏州工业园区杰士通真空技术有限公司 Oil cooling system for double-chamber vacuum oil quenching furnace

Also Published As

Publication number Publication date
DE2608850A1 (en) 1977-09-08

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Legal Events

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