A gas nitriding furnace

Abstract

The invention discloses a gas nitriding furnace. A dome bucket is arranged in a furnace pot; a dome cover is arranged at the top of the dome bucket; a vane wheel is arranged on the dome cover; a through hole is formed in the dome cover; the vane wheel is connected with a motor; a gas coil is arranged on the dome bucket, and is connected with a gas disk; gas holes are formed in the gas disk; diversion mechanisms are arranged on the inner wall of the dome bucket; and a dome bucket underframe is arranged at the bottom of the furnace pot. The gas nitriding furnace can ensure that nitriding of a plurality of layers of dense stainless steel sheet parts is uniform, and has the advantages that the gas raw material consumption is low, the single charging amount is large, the nitriding efficiency is high, and the nitriding time is short.

Description

technical field [0001] A gas nitriding furnace of the invention belongs to the technical field of nitriding furnaces. Background technique [0002] At present, the nitriding furnace can be used for nitriding treatment or nitrocarburizing treatment or cyaniding treatment of parts, in order to obtain high hardness, high wear resistance, high fatigue limit and good wear reduction performance of the workpiece. The working process of the nitriding furnace is to place the workpiece in the furnace, close the furnace cover, pass cooling water into the furnace cover to circulate water cooling, use nitrogen and other protective gases to exhaust the furnace and heat up, and feed ammonia, ethanol and other nitriding raw materials. Keep at the nitriding temperature for 3 to 90 hours, use NH3 to decompose to provide nitrogen atoms or use carbon-containing substances to provide carbon elements at the same time for nitriding or nitrocarburizing treatment, so that the surface of the workpiec...

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Problems solved by technology

Keep at the nitriding temperature for 3 to 90 hours, use NH3 to decompose to provide nitrogen atoms or use carbon-containing substances to provide carbon elements at the same time for nitriding or nitrocarburizing treatment, so that the surface of the workpiece can obtain a strengthening layer, and obtain high hardness and high hardness. Wear resistance and fatigue resistance, etc., but in the nitriding process of parts in traditional nitriding furnaces, especially the uneven nitriding of large quantities of dense parts and the underutilization of ammonia gas, such as the large quantities of gas soft Nitriding, the ammonia gas stays in the furnace for a short time, and the densely placed parts interfere with the flow of the air flow. The ammonia gas cannot be evenly distributed in the furnace, so that the nitriding of the parts is poor, and many of them are placed in the furnace. The uneven nitriding of small parts with dense layers affects the quality of the parts. Therefore, the structure of the existing gas nitriding furnace is still not perfect for the large-scale nitriding of dense parts in the furnace.

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