一、引言在精密机床的床身上,为了让传动部分的振动不传到滑动部分,必须选用高阻尼性能的铸铁件。普通灰口铸铁吸收振动能好的原因是由于片状石墨的存在,应力引起的变形不呈现正常的弹性变形状态,而近似于塑性变形状态。初次加载然后去载时,在片状石墨的尖端,贮藏应力应变能,然后使变形的恢复延 I. INTRODUCTION In the bed of precision machine tools, in order to make the transmission part of the vibration does not spread to the sliding part, you must choose the high damping properties of cast iron. Ordinary gray cast iron absorption of vibration can be good because of the presence of flake graphite, stress-induced deformation does not show the normal state of elastic deformation, and approximate plastic deformation. The first load and then to load, the tip of flaky graphite, storage stress strain energy, and then make the deformation recovery