Effects of different alloying methods on the wear resistance of wear-resistant plates. Vanadium-containing steel has improved wear resistance under low-impact abrasive wear conditions and good performance under high-impact abrasive wear conditions. Especially when vanadium and chromium are added together, the wear resistance is greatly improved.
This vanadium-containing wear plate has been used to good effect on cone crushers and excavator teeth. When the hammer crusher is used, adding vanadium can further improve the wear resistance by 20% to 30% on the basis of the improved wear resistance. The reason why the wear resistance of wear-resistant plates containing vanadium and nickel is improved is related to their role in strengthening the matrix, and it is also related to the influence of vanadium and nickel on the work hardening ability. For example, the hardness of the surface hardened layer on the remains of excavator shovel teeth after use reflects the work hardening ability of the steel. Vanadium has a body-centered cubic structure. The atomic radius is 1.41 xlom. After adding vanadium, it can be treated with water to make the vanadium solid dissolve in austenite to improve the wear resistance of the steel. After adding vanadium, precipitation strengthening treatment method can also be used, which is an effective way to improve wear resistance.
Vanadium is one of the strong carbide-forming elements that can combine with carbon to form vanadium carbides, which are very stable and have a high melting point. For example, the melting point of VC is 2830°C, and the microhardness is as high as HV2094. Vanadium reacts to form VN, which is very stable and has a melting point in the form of fine particles. Since it is difficult to dissolve in austenite, it can prevent the movement of grain boundaries and inhibit the growth of grains. Vanadium carbide, vanadium nitride and vanadium oxide all have high melting points and can serve as crystal cores during crystallization to refine the as-cast structure.
