A nitriding furnace system

Abstract

The invention relates to a nitriding furnace system, which comprises a first nitriding furnace and a second nitriding furnace, and a gas control station is connected between the first nitriding furnace and the second nitriding furnace. The first nitriding furnace includes a base, a material basket, an inner tank, a central air duct, and a thermal insulation shell, the material basket is hoisted on the base, and the inner tank and the thermal insulation shell are fixedly connected to the base through a locking device Above, the central air duct is arranged in the middle of the first nitriding furnace. The beneficial effects of the present invention are as follows: 1) The continuous production of iron nitride alloys is realized by switching between two nitriding furnaces, and the efficiency is greatly improved; 2) The heat exchange system is adopted to make full use of the waste heat of materials, and to speed up the cooling speed, which is both environmentally friendly and Economical; 3) The method of heating the material on both sides increases the amount of material added in a single batch, improving the efficiency and the stability of the nitrogen content of the product; 4) The overall structure design is ingenious, and the entire technical solution occupies a small area and is low in cost , which is convenient for large-scale promotion and use.

Description

technical field [0001] The invention relates to an iron alloy nitriding furnace, in particular to a nitriding furnace system, which belongs to the technical field of mechanical equipment. Background technique [0002] Nitrogen is an austenite stabilizing element and has the function of delaying the precipitation of carbides. It can improve the strength and corrosion resistance of steel. It is considered to be one of the most valuable new materials for research and development. Therefore, the production process of high nitrogen steel Research and development has become the focus of attention and development of all countries. The most ideal way to produce high-nitrogen steel is to add nitrogen-containing iron alloys. At present, there are two main iron alloy nitriding processes for domestic industrialization: normal pressure nitriding method and pre-vacuum pressure nitriding method. No matter which method has some problems, 1) in the prior art, in order to prevent the oxidati...

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Problems solved by technology

At present, there are two main iron alloy nitriding processes for domestic industrialization: normal pressure nitriding method and pre-vacuum pressure nitriding method. No matter which method has some problems, 1) in the prior art, in order to prevent the oxidation of iron nitride alloy, The high-temperature finished product after the nitriding reaction must be sealed and cooled before it can be released from the furnace. The current cooling technology mainly adopts the method of cooling with the furnace or forced cooling on the outer wall of the reaction tank. Both methods waste the heat energy of the product and reduce the cooling efficiency; 2) Continuous production is basically impossible in the existing technology, so the production cycle is long and the efficiency is low; 3) The heating of the metal material in the prior art is single-sided heating, upper radiation or heating on the outer circumference of the cylinder, so the thickness of the material is too thick. Causes uneven heating temperature, resulting in unstable nitrogen content of the product

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