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Some introduction of vacuum nitriding treatment

The elements aluminum, chromium, vanadium and molybdenum in traditional alloy steels are very helpful for nitriding. When these elements come into contact with primary nitrogen atoms, these elements form stable nitride at the nitriding temperature. In particular, molybdenum is used not only as a nitride-forming element, but also as a brittle property that occurs when the nitriding temperature decreases.
Elements in other alloy steels, such as nickel, copper, silicon and manganese, contribute little to the nitriding properties. In general, if the steel contains one or more nitride-forming elements, the effect of nitriding is better.

Among them, aluminum is a strong nitride element, with 0.85-1.5% aluminum nitriding effect is good. For chromium-containing chromium steels, good results can be obtained if the content is sufficient. However, unalloyed carbon steels are not suitable for nitriding steels due to their fragile nitriding layer and easy peeling

Classification of surface heat treatment

Surface heat treatment technology can be roughly divided into three categories: overall surface heat treatment, surface heat treatment and chemical surface heat treatment. The same metal chooses different surface heat treatment technology, which can achieve different arrangements, and then has different functions. Let's analyze the specific problem specifically to see what three methods of surface heat treatment are

2021

09-15

Principle of vacuum nitriding treatment

Gas nitriding generally uses anhydrous ammonia (or ammonia + hydrogen, or ammonia + nitrogen) as the nitrogen supply medium. The entire nitriding process can be divided into three stages

2021

09-15

Classification and hardness testing methods for heat treatment plants

The hardness of the heat treated workpiece is tested by a hardness tester. PHR series portable surface Rockwell hardness tester is very suitable for detecting the hardness of surface heat treatment workpieces, and can test various surface heat treatment workpieces with an effective depth of more than 0.1mm. Simple operation, easy to use, low price, can directly read the hardness value

2021

09-15

Common sense of vacuum heat treatment

When disposing of titanium alloy in vacuum furnace, it is not suitable to use nitrogen as a cooling gas, because titanium and nitrogen react at high temperature, forming golden yellow titanium nitride.

2021

09-15