Thermal processing analysis of a new type of high manganese wear-resistant steel

High manganese wear-resistant steel is a kind of special alloy steel which has high hardness and excellent wear resistance, and is widely used in many industrial and engineering applications. The new type of high manganese wear-resistant steel is especially suitable for those that require excellent wear resistance and extended service life. In this article, the thermal processing of the new type of high manganese wear-resistant steel is analyzed.
    
1. Annealing
Annealing is the main way to eliminate the internal metallurgical stress of high-manganese wear-resistant steel. The annealing temperature of high-manganese wear-resistant steel should be lower than 900 °C, and the annealing time should be controlled at 15 - 20 hours. In the high-manganese wear-resistant steel annealing process, the heating rate is generally slow and uniform, and slow cooling is adopted after soaking.
    
2. Normalizing
Normalizing is the most conventional austenitizing method of high-manganese wear-resistant steel. It is to heat the high-manganese wear-resistant steel to a temperature slightly higher than the Ac3 line, and keep it for a period of time, and then cool it in open air or in a furnace. The normalizing temperature of high manganese wear resistant steel is 850 - 900℃, and the annealing time is about 6 - 8 hours.
    
3. Quenching
Quenching is an important process for improving the surface hardness of high-manganese wear resistant steel. It is necessary to choose a suitable quenching medium to ensure that the quenching temperature is uniform and the heat preservation time is appropriate. The quenching temperature of the new type of high manganese wear-resistant steel is generally selected around 900℃, which is slightly higher than the austenitizing temperature.
    
4. Tempering
After quenching, the high-manganese wear-resistant steel needs to be steamed at a suitable temperature to obtain a higher hardness and better wear resistance. The tempering temperature is generally between 200℃ and 500℃, and the tempering time is about 3 to 4 hours.
    
In order to extend the service life and improve the performance of high-manganese wear-resistant steel, it is necessary to pay attention to the correct selection of the annealing, normalizing, quenching and tempering temperatures, and appropriately adjust the time and cooling rate of these processes.

---