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FI893613A - Process for making ferritic steel workpieces - Google Patents

Process for making ferritic steel workpieces Download PDF

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Publication number
FI893613A
FI893613A FI893613A FI893613A FI893613A FI 893613 A FI893613 A FI 893613A FI 893613 A FI893613 A FI 893613A FI 893613 A FI893613 A FI 893613A FI 893613 A FI893613 A FI 893613A
Authority
FI
Finland
Prior art keywords
workpiece
ferritic steel
nickel
steel workpieces
cobalt
Prior art date
Application number
FI893613A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI90439B (en
FI893613A0 (en
FI90439C (en
Inventor
Knut Jansen
Andreas Franziskus
Hans-Joachim Pluemer
Original Assignee
Itw Ateco 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 Itw Ateco Gmbh filed Critical Itw Ateco Gmbh
Priority to FI893613A priority Critical patent/FI90439C/en
Publication of FI893613A0 publication Critical patent/FI893613A0/en
Publication of FI893613A publication Critical patent/FI893613A/en
Publication of FI90439B publication Critical patent/FI90439B/en
Application granted granted Critical
Publication of FI90439C publication Critical patent/FI90439C/en

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  • Electroplating Methods And Accessories (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention relates to a method for manufacturing workpieces of ferritic steel, in which the workpiece is formed from chrome steel with a chromium content of at least 13%, after which the workpiece is provided with a coating of nickel or of an alloy which essentially contains nickel or cobalt, the thickness of which coating is at least 5 μm, whereupon the workpiece is diffusion- annealed at at least 850 degree C in an oxygen-free environment and in this way the layer alloyed with nickel or cobalt is brought to the desired hardness, with martensite formation.
FI893613A 1989-07-28 1989-07-28 Process for making ferritic steel workpieces FI90439C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI893613A FI90439C (en) 1989-07-28 1989-07-28 Process for making ferritic steel workpieces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI893613A FI90439C (en) 1989-07-28 1989-07-28 Process for making ferritic steel workpieces
FI893613 1989-07-28

Publications (4)

Publication Number Publication Date
FI893613A0 FI893613A0 (en) 1989-07-28
FI893613A true FI893613A (en) 1991-01-29
FI90439B FI90439B (en) 1993-10-29
FI90439C FI90439C (en) 1994-02-10

Family

ID=8528802

Family Applications (1)

Application Number Title Priority Date Filing Date
FI893613A FI90439C (en) 1989-07-28 1989-07-28 Process for making ferritic steel workpieces

Country Status (1)

Country Link
FI (1) FI90439C (en)

Also Published As

Publication number Publication date
FI90439B (en) 1993-10-29
FI893613A0 (en) 1989-07-28
FI90439C (en) 1994-02-10

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Legal Events

Date Code Title Description
BB Publication of examined application
MM Patent lapsed
MM Patent lapsed

Owner name: ITW-ATECO GMBH