抄録
Effects of molybdenum on the graphitization and mechanical properties of calcium wrought graphite steel containing about 1.3%C and 0.8%Si were investigated. The suitable annealing temperature for the graphitization has been found to be in the range from 800° to 900°C. Graphitization was considerably suppressed depending upon the amount of molybdenum as the carbide forming element and also the hardness increased. The upper molybdenum limit may be considered as 0.3%, of which this element insures the precipitation of necessary graphite and the strength of the matrix. Mechanical properties of calcium treated Graph-Mo steels were closely related to the microstructures, which in turn depend upon oil quenching, the tempering temperature and the resulting combined carbon.
