FR2018372A1 - Improving steel fatigue resistance at borders of hard- - ened zone - Google Patents

Improving steel fatigue resistance at borders of hard- - ened zone

Info

Publication number
FR2018372A1
FR2018372A1 FR6931838A FR6931838A FR2018372A1 FR 2018372 A1 FR2018372 A1 FR 2018372A1 FR 6931838 A FR6931838 A FR 6931838A FR 6931838 A FR6931838 A FR 6931838A FR 2018372 A1 FR2018372 A1 FR 2018372A1
Authority
FR
France
Prior art keywords
fatigue resistance
borders
ened
zone
hard
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Withdrawn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
FR6931838A
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.)
JAPANESE NATIONAL RAILWA
Japan National Railways
Nippon Steel Corp
Original Assignee
JAPANESE NATIONAL RAILWA
Japan National Railways
Sumitomo Metal Industries Ltd
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 JAPANESE NATIONAL RAILWA, Japan National Railways, Sumitomo Metal Industries Ltd filed Critical JAPANESE NATIONAL RAILWA
Publication of FR2018372A1 publication Critical patent/FR2018372A1/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Withdrawn legal-status Critical Current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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • 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
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

Surfaces of hardened zone borders are given a local case-hardening under pressure. Preferably, using induction or flame hardening. Steel is cold-worked under pressure by steel sandblasting or roller smoothing. Steel material is straight or curved axle shaft for railway wagon axle, armature shaft, roller or crankshaft. Advantage: prevents reduction of fatigue resistance by residual surface strain at edges of hardened region.
FR6931838A 1968-09-18 1969-09-18 Improving steel fatigue resistance at borders of hard- - ened zone Withdrawn FR2018372A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6774368 1968-09-18

Publications (1)

Publication Number Publication Date
FR2018372A1 true FR2018372A1 (en) 1970-05-29

Family

ID=13353715

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6931838A Withdrawn FR2018372A1 (en) 1968-09-18 1969-09-18 Improving steel fatigue resistance at borders of hard- - ened zone

Country Status (2)

Country Link
DE (1) DE1947273B2 (en)
FR (1) FR2018372A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018006887A1 (en) 2016-07-07 2018-01-11 Bonatrans Group A.S. Axle for rail vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018006887A1 (en) 2016-07-07 2018-01-11 Bonatrans Group A.S. Axle for rail vehicles

Also Published As

Publication number Publication date
DE1947273A1 (en) 1970-04-16
DE1947273B2 (en) 1971-09-30

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Legal Events

Date Code Title Description
ST Notification of lapse