Effect of Rare Earth Ce on Inclusions in Q345 Steel

Abstract

Q345 steel is an important raw material for the production of suspension spring steel and valve spring steel. Improving its comprehensive mechanical properties and fatigue resistance and ensuring the production continuity of Q345 steel is a topic of general concern in the industry. The addition of rare earth can effectively control the number, size, morphology, composition and distribution of inclusions in Q345 steel, which is of great significance for improving the quality of Q345 steel. However, at present, the addition process of rare earth Ce in the production process of 55SiCr spring steel is faced with problems such as low yield and difficult continuous production of Shuikou nodules and blockage. However, adding rare earth slag to refining slag is an effective solution to improve the yield of rare earth Ce. However, there is still a lack of research in this direction in the industry. In order to improve the yield of rare earth Ce, determine the ratio of rare earth refining slag and achieve the best metallurgical effect, it is the main research direction of this project.