Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1978-02-06
1979-02-13
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
148 167, 148 203, 148126, B22F 300
Patent
active
041393759
ABSTRACT:
In a process for sintering powder metal parts comprising:
(a) passing the parts through a furnace adapted therefor from its upstream end to its downstream end, said furnace having two successive zones, an upstream zone, which is maintained at a temperature in the range of about 800.degree. F to about 2200.degree. F and a cooling zone, said furnace further having an atmosphere therein comprising carbon monoxide, hydrogen, carbon dioxide, water and nitrogen distributed throughout the zones;
(b) permitting the parts to reside in the upstream zone for a sufficient length of time to cause sintering; and
(c) removing the sintered parts from the furnace, the improvement comprising: introducing a mixture consisting essentially
Of methanol and nitrogen into the upstream zone at a point where a temperature of at least about 1500.degree. F is maintaied, the methanol and nitrogen being in a ratio sufficient to provide, when subjected to such temperature, an atmosphere comprising, in percent by volume, about 1 to about 20 percent carbon monoxide; and about 1 to about 40 percent hydrogen; and balance nitrogen.
REFERENCES:
patent: 2673821 (1954-03-01), Stutzman
patent: 3891473 (1975-06-01), Latua
Kinneman Thomas F.
Solomon Jack
Bresch Saul R.
Hunt Brooks H.
Union Carbide Corporation
LandOfFree
Process for sintering powder metal parts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for sintering powder metal parts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for sintering powder metal parts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-689413