Heat treating atmospheres from non-cryogenically generated...

Details Heat treating atmospheres from non-cryogenically generated... Heat treating atmospheres from non-cryogenically generated...

C - Chemistry, Metallurgy

21

D

C21D 1/76 (2006.01) B23K 35/38 (2006.01)

Patent

CA 2111483

ABSTRACT An improved process for producing nitrogen-based atmospheres suitable for annealing ferrous metals and alloys, brazing metals, sintering metal and ceramic powders, and sealing glass to metals from non-cryogenically generated nitrogen is presented. These atmospheres are produced by 1) humidifying non-cryogenically generated nitrogen containing less than 5.0 vol.% residual oxygen, 2) mixing it with a specified amount of a hydrocarbon gas, 3) feeding the gaseous mixture into the heating zone of a furnace through a diffuser, and 4) converting in-situ the residual oxygen and moisture present in it to a mixture of carbon dioxide, carbon monoxide, moisture, and/or hydrogen. The key features of the present invention include a) humidifying the feed gas prior to introducing it into the heating zone of a furnace operated above about 800°C and b) using enough amount of a hydrocarbon gas to facilitate in-situ conversion of residual oxygen and moisture present in the feed gas to a mixture of carbon dioxide, carbon monoxide, moisture, and hydrogen in the heating zone of a furnace.

Affiliated with

Also associated with

Rating

Heat treating atmospheres from non-cryogenically generated... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heat treating atmospheres from non-cryogenically generated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat treating atmospheres from non-cryogenically generated... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1364000