Process for heat treating ferrous material

Details Process for heat treating ferrous material Process for heat treating ferrous material

C - Chemistry, Metallurgy

21

D

148/43

C21D 9/52 (2006.01) C21D 1/76 (2006.01)

Patent

CA 1239078

PROCESSES FOR HEAT TREATING FERROUS MATERIAL Abstract Rod and wire or other ferrous material is annealed, normalized, spherodized, etc. in a furnace under nitrogen based atmospheres to which is added a mixture of methylacetylene and propadiene. This latter mixture reacts with decarburizing substances such as carbon dioxide in the furnace at relatively low temperatures of about 1000-1100°F to substantially preclude decarburization of the ferrous material. The use of a mixture of methylacetylene and propadiene in the amount of approximately 0.1-10% by volume of the furnace atmosphere also results in a relatively high CO level, reduces decarburization and oxidation of the ferrous material.

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