Process for the boronizing of pieces made of metal or cermet

Details Process for the boronizing of pieces made of metal or cermet Process for the boronizing of pieces made of metal or cermet

1980-02-21

1981-09-15

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 635, 427253, 148 6, C23C 1100

Patent

active

042895456

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: 2801187 (1957-07-01), Galmiche
patent: 2816048 (1957-12-01), Galmiche
patent: 3673005 (1972-06-01), Kunst

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