Effect of Different Tempering Processes on Cold Bending Properties of NM500 Steel Plate

NM500 steel plate is a high-strength low-alloy steel plate with good wear resistance. It is widely used in the manufacture of military equipment, engineering machinery, agricultural machinery and other industrial machinery. In order to meet the different needs of users, it is necessary to consider the appropriate tempering process of NM500 steel plate during the cold bending process. The cold-bending performance of NM500 steel plate is also related to the tempering process.
    
The tempering process is a kind of heat treatment process in which a workpiece is heated to a certain temperature and then cooled to room temperature or a goal temperature of a certain predetermined rate. In general, the tempering process used for cold bending of NM500 steel plate is a winding heat treatment, which can effectively improve the cold-bending effect of the steel sheet. The following is a detailed introduction to the effects of different tempering processes on the cold bending properties of NM500 steel plate.
    
1. Overtempering process
The tempering process of the NM500 steel plate can be divided into overtempering and normal tempering. The overtempering is to carry out the tempering process at a high temperature. After the overtempering process, the hardness of the NM500 steel plate is higher. But at the same time, it will reduce the toughness of the steel plate, which will have a great impact on the cold bending performance. Therefore, it is not suitable for NM500 steel plate for cold bending.
    
2. Normal tempering process
The normal tempering process of NM500 steel plate is carried out at a low temperature, which can improve the toughness of the sheet while maintaining its strength. As a result, the cold-bending performance of the sheet is significantly improved. Therefore, the use of normal tempering process is a better choice for the cold bending of NM500 steel plate.
    
Is the normal tempering process of NM500 steel plate; Figure 2 is the overtempering process of NM500 steel plate.
Normal Tempering Process of NM500 Steel Plate
Overtempering Process of NM500 Steel Plate

To sum up, after considering the factors such as cold-bending performance and toughness, the normal tempering process is the best choice for NM500 steel plate cold bending. The use of overtempering process is not recommended.

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