Global patent index - EP 0971047 A1

EP 0971047 A1 2000-01-12 - Boriding agent

Title (en)

Boriding agent

Title (de)

Boriermittel

Title (fr)

Agent de boruration

Publication

EP 0971047 A1 (DE)

Application

EP 99111057 A

Priority

DE 19830654 A

Abstract (en)

A metal boriding agent, including a potassium fluoroborate activator containing calcium fluoride, is new. A metal boriding agent comprises, apart from a boron source and an inert refractory diluent, 1-5 wt. % potassium fluoroborate and 5-40 wt. % calcium fluoride as activator. An Independent claim is also included for production of single phase Fe2B-containing boride layers on ferrous metal workpieces by covering the workpiece surface with the above boriding agent and heat treating at 800-1100 degrees C. Preferred Features: The boriding agent comprises (by wt.) 3-5 (especially 4)% boron carbide, 2-4 (especially 2.5)% potassium fluoroborate, 10-30 (especially 25)% calcium fluoride and 61-85 (especially 68.5)% silicon carbide.

Abstract (de)

Die Erfindung betrifft ein Boriermittel zur Erzeugung von Boridschichten auf metallischen Werkstücken, das im wesentlichen aus borabgebenden Substanzen, aktivierenden Substanzen und im Rest aus feuerfestem, inerten Streckmittel besteht und das dadurch gekennzeichnet, ist daß es als aktivierende Substanz eine Kombination aus, bezogen auf die Gesamtmenge des Boriermittels, 1 bis 5 Gew.% Kaliumtetrafluoroborat und 5 bis 40 Gew.% Calciumfluorid enthält. Mit diesem Boriermittel lassen sich auf Werkstücken aus Eisenwerkstoffen einphasige, Fe2B-enthaltende Boridschichten erzeugen. Das Mittel führt zu geringeren Fluor- bzw. Fluoridemissionen.

IPC 1-7 (main, further and additional classification)

C23C 8/70

IPC 8 full level (invention and additional information)

C23C 8/68 (2006.01); C23C 8/70 (2006.01)

CPC (invention and additional information)

C23C 8/70 (2013.01)

Citation (search report)

  • [A] DE 2147755 A1
  • [A] GB 1436945 A
  • [A] CHEMICAL ABSTRACTS, vol. 90, no. 12, 19. M{rz 1979 (1979-03-19) Columbus, Ohio, US; abstract no. 90930, SADOK, LUCJAN ET AL: "Agents in powder form for the boronizing of steel" XP002121000 & PL 90 793 B1 (AKADEMIA GORNICZO-HUTNICZA, POL.) 31 Januar 1977
  • [X] CHEMICAL ABSTRACTS, vol. 110, no. 4, 23. Januar 1989 (1989-01-23) Columbus, Ohio, US; abstract no. 27915, ZHANG, YIBIN: "Pasting sheet for boronizing" XP002121001 & CN 86 107 815 A (SHANDONG PROVINCE NEW MATERIALS INSTITUTE, PEOP. REP. CHINA) 18. Mai 1988 (1988-05-18)
  • [A] CHEMICAL ABSTRACTS, vol. 102, no. 26, 1. Juli 1985 (1985-07-01) Columbus, Ohio, US; abstract no. 224093, RUS, J. ET AL: "Boronizing of 304 steel" XP002121002 & J. MATER. SCI. LETT. (1985), 4(5), 558-60 ,1985,
  • [X] CHEMICAL ABSTRACTS, vol. 95, no. 26, 28. Dezember 1981 (1981-12-28) Columbus, Ohio, US; abstract no. 223836, KRUKOVICH, M. G. ET AL: "Composition for boronizing steel articles" XP002121003 & SU 834 241 A1 (BELORUSSIAN POLYTECHNIC INSTITUTE, USSR) 30 Mai 1981

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI NL SE

EPO simple patent family

EP 0971047 A1 20000112; EP 0971047 B1 20030108; AT 230809 T 20030115; CA 2277006 A1 20000109; CZ 295205 B6 20050615; CZ 9902439 A3 20000315; DE 19830654 A1 20000113; DE 19830654 C2 20020627; ES 2189316 T3 20030701; JP 2000038651 A 20000208; JP 4209043 B2 20090114; TR 9901596 A2 20000221; TR 9901596 A3 20000221; US 6245162 B1 20010612; ZA 9904445 B 20000113

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