A Steam Oxidation Pit Furnace

Abstract

The invention discloses a steam oxidation well furnace which comprises a furnace shell, a furnace cover, a furnace tank and a heating mechanism, wherein the furnace tank is arranged in the furnace shell; the heating mechanism is used for heating work pieces in the furnace tank; the bottom part of the furnace shell is provided with a steam preheating mechanism which is connected with an external steam source; and the steam preheating mechanism is communicated with the bottom part of the furnace tank through the steam diffusion structure. An individual steam preheating mechanism is added below the furnace tank, steam enters the furnace tank after the steam is heated by the steam preheating mechanism and is diffused uniformly by the steam diffusion structure, the temperature vibration in the furnace tank is reduced greatly, the expansion and contraction phenomenon in the furnace body is reduced, the welding point of the steam pipeline is difficult to drop off, and the steam pipeline is difficult to crack; and simultaneously the steam can be fused with metal work pieces more uniformly, the oxidation effect is improved obviously, the density of oxidizing materials on the surfaces of the metal work pieces is better, and the content of ferroferric oxide can reach more than 90%.

Description

Technical field [0001] The invention relates to a steam oxidation pit furnace, which belongs to the technical field of heat treatment equipment. Background technique [0002] Pit furnace is a cycle-operated heat treatment equipment, suitable for the treatment of rods and long shaft metal components, and is widely used in basic industrial fields such as automobile parts manufacturing and mold manufacturing. With the continuous development of my country's social economy, the domestic and foreign markets have continuously improved the requirements for metal products, and at the same time, the requirements of the surface hardness of the metal components and the service life of the components are getting higher and higher by the finished product manufacturers. Therefore, the current domestic common steam oxidation pit furnace can no longer meet the needs of society and development. [0003] The steam oxidation pit furnace is mainly used in the surface oxidation treatment of metal compo...

AI Technical Summary

Problems solved by technology

The working principle of the existing steam oxidation well furnace in China is: the steam pipe is wound on the outer wall of the furnace tank in a spiral manner, the heat energy of the steam comes from the furnace tank, and the heating temperature cannot be precisely controlled; There is a large difference in the heating temperature of the metal components in the tank, which is prone to large temperature fluctuations, resulting in thermal expansion and contraction of the metal tank body and steam pipes, pipes are easy to break, and pipe welding points are easy to fall off; and large temperature fluctuations and Poor steam purity greatly affects the formation of oxides on the surface of metal components. The content of oxides containing iron tetroxide is only 80%, and the technology is far behind the advanced level of foreign countries.

At present, the ordinary domestic steam oxidation pit furnace can no longer meet the needs of society and development

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