What are the effects of alloying elements on the processing performance of thick steel plates?

1. The influence of alloying elements on the forging properties of thick steel plates
The lower the temperature of the solid and high-efficiency liquidus and the narrower the crystal body temperature zone, the better the forging performance. The key to the influence of alloying elements on forging performance lies in their influence on the Fe-Fe3C phase diagram. In addition, many elements, such as Cr, Mo, V, Ti, Al, etc., produce high melting point cementite or metal oxide material points in the steel, which expands the viscosity of the steel, reduces the flowability, and makes the forging performance malignant.

2. The influence of alloying elements on the plastic deformation of thick steel plate
Plastic deformation production and processing are divided into heat treatment and cold drawing. Alloying elements are incorporated into the component undercooling, or cementite (such as Cr, Mo, W, etc.) is generated, which increases the thermal deformation resistance of the steel and significantly reduces the thermosetting plastics, which is very easy to forge cracks. Generally, the hot workability of carbon steel is much different than that of carbon steel.

3. The influence of alloying elements on the welding performance of thick steel plate
All alloying elements improve the cutting performance of steel, promote the production of ductile mechanism (austenite), and affect the welding performance of electric welding. However, there is a small amount of Ti and V in the steel, which can improve the welding performance of the steel plate.

4. The influence of alloy elements on the drilling performance of thick steel plates. Drilling performance is closely related to the hardness of steel. The strength range of steel suitable for drilling production and processing is 170HB～230HB. Generally, the drilling performance of carbon steel is worse than that of carbon steel. However, the moderate addition of S, P, Pb and other elements can greatly improve the drilling performance of steel.

5. The influence of alloying elements on the performance of thick steel plate heat treatment method
The performance of the heat treatment method reflects the degree of difficulty of the steel heat treatment process and the tendency of the heat treatment process to cause shortcomings. The key includes cutting performance, over-temperature sensitivity, quenching aging tendency and air oxidation carburizing tendency. Carbon steel has high cutting performance, and a slower cooling method can be selected during heat treatment, which can reduce the deformation and cracking tendency of the product workpiece. Adding manganese and silicon will increase the over-temperature sensitivity of the steel plate.