Application of Solid Solution Reinforced Ferrites QT500-14 in Steering Housing
The chemical compositions design,rational melting process,and iron liquid treatment process of QT500-14 nodular iron were introduced.It was founded by sampling from body of separately poured test block,using Si solid solution strength-ening could ensure the matrix structure and nodularizing grade meeting requirements of QT500-14 nodular iron steering housing and thereby meeting mechanical properties and hardness requirement.The study data of different Si contents influen-cing materials properties showed:with Si content increase,the graphite had a tendency to refine,the nodule diameter gradually reduced,the solid strengthening effect became more obvious,the tensile strength gradually increased,toughness showed a slight decline trend.In eutectic transformation the Si was favoring graphite separating,reducing graphite size,increasing graphite roundness,reducing the cutting effect of the matrix.
万方数据
维普
