EP 0946784 A4 20020130 - METHOD AND COMPOSITION FOR DIFFUSION ALLOYING OF FERROUS MATERIALS
Title (en)
METHOD AND COMPOSITION FOR DIFFUSION ALLOYING OF FERROUS MATERIALS
Title (de)
VERFAHREN UND ZUSAMMENSETZUNG ZUM DIFFUSIONSLEGIEREN VON EISENHALTIGEN MATERIALIEN
Title (fr)
COMPOSITION ET PROCEDE D'ALLIAGE PAR DIFFUSION DE MATERIAUX FERREUX
Publication
Application
Priority
- US 9719278 W 19971023
- US 2916396 P 19961025
Abstract (en)
[origin: WO9818978A1] A method for diffusion coating workpieces of ferrous base metals such as carbon steel and cast iron includes the step of weighing and mixing the following components, in powdered form: Chromium 40-50 wt.%, Ferrochromium 25-37 wt.%, Tantalum Carbide 0.40-0.65 wt.%, Vanadium 0.35-0.70 wt.%, Ammonium Halide 4-5 wt.%, Aluminum Oxide remainder. The workpieces are preferably degreased and then placed in a container with the mixed components. The container is sealed and heated to a temperature of 1000-1050 DEG C. The workpieces and the composition are kept at that temperature for a predetermined period, on the order of forty-five minutes or longer, to permit a surface layer of desired thickness to form. The container is then cooled in a conventional cooling chamber and the workpieces are removed. The method produces coatings having good wear and corrosion resistance.
IPC 1-7
C23C 16/30; C22C 29/02; B21D 39/00; C23C 10/30; C23C 10/32; C22C 32/00; C23C 10/42
IPC 8 full level
C22C 32/00 (2006.01); C23C 10/30 (2006.01); C23C 10/32 (2006.01)
CPC (source: EP)
C22C 32/0026 (2013.01); C23C 10/30 (2013.01); C23C 10/32 (2013.01)
Citation (search report)
- [A] GB 906884 A 19620926 - DEUTSCHE EDELSTAHLWERKE AG
- [A] US 4099993 A 19780711 - MULLER HERMANN, et al
- [A] GB 1070158 A 19670524 - DEUTSCHE EDELSTAHLWERKE AG
- See references of WO 9818978A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9818978 A1 19980507; AU 4918897 A 19980522; CA 2269735 A1 19980507; EP 0946784 A1 19991006; EP 0946784 A4 20020130
DOCDB simple family (application)
US 9719278 W 19971023; AU 4918897 A 19971023; CA 2269735 A 19971023; EP 97911922 A 19971023