How to choose the shielding gas in the ionizing nitriding furnace

Ion nitriding furnace is an important surface treatment equipment used to surface harden metal products. In ionizing nitriding furnaces, the choice of shielding gas has an important impact on both the processing quality and the treatment results. Different shielding gases are used differently in ionizing nitriding furnaces. So how to choose the shielding gas in the ionizing nitriding furnace?
1. Nitrogen

Nitrogen is one of the commonly used shielding gases in ion nitriding furnaces, mainly used to protect heating elements and workpieces in nitriding furnaces to prevent contamination by oxygen and other impurities. Nitrogen is inert and does not react easily with other substances, and has a good protective effect on metal materials in the nitriding furnace. In ionnitriding furnaces, nitrogen gas of higher purity is usually used to: The treated metal material is not contaminated.

2. Hydrogen Hydrogen
is also one of the commonly used shielding gases in ion nitriding furnaces. Hydrogen has good reducing properties, which can reduce the content of oxides and other impurities on the surface of metal materials, thereby improving the effect of nitriding. In ion nitriding furnaces, hydrogen is often mixed with nitrogen for better protection and treatment.
3. Argon Argon
is an inert gas that is not easy to react with other substances. In ion nitriding furnaces, argon is often used to protect components in the nitriding furnace from oxidation and other contamination. Argon can also be used to reduce the amount of oxides and other impurities on the surface of metal materials, thereby improving the effectiveness of nitriding.
4. Oxygen

Oxygen is a gas that reacts easily with other substances and is not suitable for use as a shielding gas in ionnitriding furnaces. If oxygen is present in the ionizing furnace, it will lead to an increase in the content of oxides and other impurities on the surface of the metal material, which will affect the effect of nitriding.

5. Mixed gas
In the ion nitriding furnace, it is sometimes necessary to use a mixture of multiple shielding gases to achieve better treatment results. For example, a mixture of nitrogen and hydrogen can improve the reducing properties of metal surfaces and thus the effect of nitriding. The choice of different shielding gas mixing ratios needs to be determined according to the specific treatment requirements and the characteristics of the metal material.
When selecting the shielding gas in the ionizing nitriding furnace, it is necessary to consider the characteristics of the metal material, the treatment requirements and the protection effect, and other factors, and select the appropriate shielding gas and mixed gas to: Stability and reliability of processing results and processing quality.