Method for generating a reducing atmosphere for heat-treating in

Details Method for generating a reducing atmosphere for heat-treating in Method for generating a reducing atmosphere for heat-treating in

1976-03-18

1978-01-17

Satterfield, Walter R.

Metal treatment

Compositions

Heat treating

148 165, 148 166, 252375, C21D 148

Patent

active

040690717

ABSTRACT:
An atmosphere of nitrogen containing hydrogen is generated by cracking amia and recycling a previously generated atmosphere that already had been used. The atmosphere generated by cracking, and the recovered atmosphere that previously had been used, are subjected in a reactor to a catalytic treatment at a temperature between 0.degree. to 600.degree. C and then, after passing through a refrigeration arrangement, the resultant atmosphere is prepared for use. As one example, the atmosphere is adapted to be used as a protective atmosphere for metallurgical heat-treating furnaces.

REFERENCES:
patent: 2606875 (1952-08-01), Rosenblatt
patent: 3268371 (1966-08-01), Daubersy
patent: 3399085 (1968-08-01), Knechtel et al.
patent: 3620518 (1971-11-01), Winter et al.

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