The Effect of Surface Quenching on the Wear Resistance of 65Mn Steel Plate

The effects of surface quenching and nitriding treatment on the wear resistance of 65Mn steel plate are as follows:

1、 The Effect of Surface Quenching on the Wear Resistance of 65Mn Steel Plate

Hardness improvement:

Surface quenching can rapidly heat the surface of 65Mn steel plate above the phase transformation temperature, and then rapidly cool it to form martensitic structure, thereby significantly improving the surface hardness. In general, the surface hardness can reach HRC50-60.

Limited depth:

The depth of the hardened layer of surface quenching is relatively shallow, usually within a few millimeters. This means that the improvement of its wear resistance is mainly concentrated in the surface layer, with limited resistance to deep wear.

Impact on the substrate:

During the surface quenching process, significant residual compressive stress is generated on the surface due to rapid cooling. This compressive stress can improve the fatigue strength and stress corrosion resistance of materials, but its direct impact on wear resistance is relatively small.

2、 The Effect of Nitriding Treatment on the Wear Resistance of 65Mn Steel Plate

Extremely high hardness:

Nitriding treatment can form a highly hardened nitride layer on the surface of 65Mn steel plate, with a hardness typically reaching HRC65-72 or even higher. This high hardness makes the nitrided 65Mn steel plate have excellent wear resistance and can resist various forms of wear.

Deeper depth:

The depth of the hardened layer after nitriding treatment is relatively deeper than that of surface quenching, which can reach tens of micrometers or even deeper. This enables the nitrided 65Mn steel plate to maintain good wear resistance even in the face of deeper wear.

Good chemical stability:

The nitride layer has good chemical stability, is not easily reactive with most chemicals, and can resist corrosion and oxidation wear. This is particularly important in some corrosive environments, as it can extend the service life of the parts.

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