How to improve the wear resistance of 65Mn steel plate

The wear resistance of 65Mn steel plate can be improved by the following methods:

1、 Heat treatment method

Quenching+Low temperature tempering:

Heating 65Mn steel plate to 810 ℃ -830 ℃ for austenitization, followed by rapid quenching, can obtain a high hardness martensitic structure.

Next, low-temperature tempering is carried out, usually between 150 ℃ and 250 ℃, to reduce quenching stress, improve toughness while maintaining high hardness.

Surface quenching:

The surface of 65Mn steel plate is rapidly heated to the quenching temperature using induction heating, flame heating, and other methods, and then quenched.

2、 Surface treatment method

Carbonization:

Perform carburizing treatment on 65Mn steel plate to form a high carbon layer on the surface.

The carburizing temperature is generally between 900 ℃ and 950 ℃, and quenching and low-temperature tempering are carried out after carburizing.

The surface carbon content increases, the hardness significantly improves, and the wear resistance is greatly enhanced. For example, the surface hardness after carburizing treatment can reach HRC60 or higher.

Nitriding:

At a certain temperature (usually between 500 ℃ and 570 ℃), nitrogen or ammonia gas is introduced into the furnace to allow nitrogen atoms to penetrate the surface of the 65Mn steel plate, forming a nitride layer.

After nitriding, the surface hardness is high, the wear resistance is good, and the corrosion resistance is strong. The surface hardness can reach HRC65-72.

Hard chrome plating:

A hard chromium layer is deposited on the surface of 65Mn steel plate by electroplating.

Hard chromium has high hardness (up to HRC65-70) and good wear resistance and corrosion resistance.

3、 Adding alloy elements

Microaloying:

In the smelting process of 65Mn steel, trace amounts of alloying elements such as vanadium, titanium, niobium, etc. are added.

These elements can refine the grain size, improve the strength and toughness of steel, and also enhance wear resistance.

Alloying:

Add appropriate amounts of alloying elements such as chromium, molybdenum, tungsten, etc. to improve the hardenability and hardness of steel.

These alloying elements can form special carbides, enhancing the wear resistance of steel.

But the amount of alloying elements added should be appropriate to avoid affecting other properties of the steel.

4、 Optimize processing technology

Cold processing:

Cold rolling, cold drawing and other cold working treatments are carried out on 65Mn steel plates to induce work hardening.

Work hardening can improve surface hardness and strength, thereby enhancing wear resistance.

But the deformation during cold processing should not be too large to avoid defects such as cracks.

Shot peening treatment:

Using high-speed steel shot to impact the surface of 65Mn steel plate, causing plastic deformation on the surface.

Shot peening can form a compressive stress layer on the surface, improve surface hardness and wear resistance, and also remove surface oxide scale and rust.

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