Correlation between microstructure and properties of DIN17100 St37-2 steel plate

The relationship between microstructure and performance of DIN17100 St37-2 steel plate is mainly reflected in the following aspects:

1. Grain size: Fine grains are beneficial to improving the strength and toughness of DIN17100 St37-2 steel plate, because fine grain boundaries can hinder the movement of dislocations, thereby improving the strength of the material. Larger grains are prone to local softening and cracking.

2. Phase composition: Different phase compositions have a significant impact on material properties. For example, the distribution of carbide particles affects the material's hardness and wear resistance.

3. Precipitated phases: Precipitated phases that may occur during heat treatment will affect the strength, hardness and corrosion resistance of the material.

4. Dislocation density: Dislocation density is closely related to the plastic deformation ability and tensile strength of the material. Appropriate dislocation density can increase the plasticity of the material, but too high dislocation density may lead to increased brittleness.

5. Grain boundary characteristics: Grain boundaries have an important impact on the strength, toughness and creep properties of materials. Certain types of grain boundaries can serve as crack propagation paths, affecting the material's fracture behavior.

6. Carbide distribution: The size, shape and distribution of carbides will affect the hardness, wear resistance and strength of the material.

Through reasonable heat treatment process and control of process parameters, the microstructure of DIN17100 St37-2 steel plate can be adjusted, thereby adjusting and optimizing its performance. Understanding the correlation between microstructure and performance can help to better design and select appropriate processes to meet specific application needs.

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