Apparatus for the boronizing of pieces made of metal or cermet a

Details Apparatus for the boronizing of pieces made of metal or cermet a Apparatus for the boronizing of pieces made of metal or cermet a

1981-05-08

1982-09-14

Kendall, Ralph S.

Coating apparatus

Gas or vapor deposition

Object embedded in particulate mass

118719, 118728, 148 6, 427253, C23C 1100, C23C 1108

Patent

active

043489800

ABSTRACT:
The invention relates to a process and apparatus for boronizing pieces made of metal or cermet and to surface-boronized pieces. The pieces are placed in a chamber at between 850.degree. and 1,150.degree. C. and they are subjected, in the presence of boron carbide, to a gaseous stream of trifluoroboroxole (BOF).sub.3. The boron carbide is advantageously pulverulent and out of contact with the pieces to be boronized.

REFERENCES:
patent: 2612442 (1952-09-01), Goetzel
patent: 2801187 (1957-07-01), Galmiche
patent: 2816048 (1957-12-01), Galmiche
patent: 2874070 (1959-02-01), Galmiche
patent: 3673005 (1972-06-01), Kunst

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