稀土对钢材性能及钢中夹杂物的影响综述

Nonmetallic inclusions can reduce the properties of steel materials, such as transverse mechanical properties and crack initiation. Effects of rare earth elements on inclusions and properties of steel, reducing fatigue life and inducing corrosion. Reducing the size, quantity and distribution of inclusions and improving the shape of inclusions can significantly improve the properties of steel materials. The effects of rare earth elements in molten steel and the improvement of corrosion resistance, mechanical properties, heat resistance and wear resistance of steel are briefly reviewed in this paper. In view of the effect of rare-earth metamorphic inclusions, the influence of rare-earth elements on the size, morphology and distribution of inclusions is expounded, and the improvement of steel properties is analyzed from the perspective of metamorphic inclusions. In addition, the mechanism of rare earth modified inclusions is described systematically. In addition, the popular rare earth electrical steel, rare earth TRIP/TWIP steel and rare earth Mg composite treatment inclusions are prospected.