Comparison of Nitriding Furnace and Vacuum Nitriding Furnace

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1. Working Principle of Nitriding Furnace

Pit-type nitriding furnace is a cycle-operated electric furnace. It is an energy-saving resistance furnace improved on the basis of a series of electric furnaces in accordance with the actual use of the user. The maximum operating temperature is 650℃. The furnace is a vertical shaft type with stainless steel tanks and materials. Basket, the workpiece is placed in the material basket, and the control atmosphere adopts the dripping type, which is dripped into the furnace pot through a flow meter and a dropper, and the fan is installed on the furnace cover, which can carry out the forced circulation of the temperature and atmosphere in the furnace pot.

2. Features of Nitriding Furnace

New energy-saving furnace lining can be used, with fast heating, less heat loss, and good furnace temperature uniformity, which is especially suitable for the heat treatment of shaft workpieces.

Using microcomputer intelligent instrument, set furnace temperature according to process requirements, automatic tracking display, PLC program control can be realized.

A variety of temperatures, atmosphere control, the upper and lower microcomputers are connected to the network, and the manipulator can achieve automatic control, recording and group control of the workshop, and small and unmanned operation.

In comparison, vacuum nitriding furnace of Shanghai Geheng Vacuum Technology Co., Ltd has the following advantages:

1. Vacuum Nitriding Furnace Working Principle

Vacuum nitriding can be carried out by injecting ammonia gas into the vacuum furnace, which is similar to pulse vacuum carburizing, ie the workpiece begins to suction after being loaded into the vacuum furnace. When the vacuum degree reaches a set value, the furnace is heated by electricity and vacuum is pumped at the same time to maintain the vacuum degree of the furnace. When the furnace temperature reaches nitriding temperature, the heat preservation lasts for a period of time. Its function is to purify the workpiece surface and burn through. , the vacuum is stopped and the nitriding gas is injected into the furnace, so that the furnace pressure rises to a certain value for a period of time, then the vacuum is pumped and maintained for a period of time, and then the nitriding gas is injected into the furnace. Thus, the nitriding layer is repeated many times until the depth of the nitriding layer reaches the requirements. During the whole process, the furnace temperature remains unchanged.

2. Vacuum Nitriding Furnace Characteristics

The heating elements are uniformly arranged along the circumference of the heating chamber, and the temperature uniformity is high.

High production efficiency and low cost.

Cooling uniformity is good and workpiece deformation is small.

Fast penetration and high surface hardness.

3. Vacuum Nitriding Furnace Advantages

Low temperature and small distortion of workpiece.

The process is suitable for many kinds of steel and widely used.

The strengthening effect is remarkable, and the wear resistance, corrosion resistance and fatigue resistance are greatly improved after treatment.

High efficiency, energy saving and environmental protection, shorter process cycle than general gas nitriding.

Editing by Baccata

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