Effects of Graphites and Carbides on the Specific Damping Capacity of Low Thermal Expansion Cast Irons

저 열팽창 주철의 진동감쇠능에 미치는 흑연 및 탄화물의 영향

Effects of the amount of flake type graphite, morphology and (V,Mo)carbides on the specific damping capacity of austenitic low thermal expansion cast irons were investigated. Specific damping capacity(SDC) of low thermal expansion cast irons increased with the increased amount of graphite. Specific damping capacity of low thermal expansion cast iron decreased with the increased Young's modulus. In the case of V and Mo addition, SDC decreased with the increased amount of carbides. Specific damping capacity increased about 2% by the movement of magenetic domains which appeared in ferromagnetic materials.