| 摘要 |
A high-damping, corrosion resistant and substantially non-magnetic material having high damping properties has been developed for use in dynamic applications, specifically, a disk drive suspension arm and load beam. A disk drive assembly includes a disk having a readable and writeable surface, a motor operable for rotating the disk, and an actuator assembly that includes a transducer mounted on a load beam. The actuator assembly is operable for positioning the transducer in transducing relationship with the surface of the disk. When the disk spins, shear forces create turbulence in the fluidic medium adjacent to the surface of the disk. The turbulence exerts unbalanced and variable forces on the load beam, inducing vibrational motion therein. If the vibrational energy stored in the load beam is not quickly damped, the surface of the disk, load beam or transducer can be damaged. The present invention discloses alloy compositions of the form (14-21)Mn, (10-13)Cr, (0-6)Si, (4-10)Ni, (0-6)Co, and (0-0.2)N, the components being present in the range of percentages indicated with the balance being Fe. A preferred embodiment of an alloy in accordance with the present invention is Fe-15Mn-12Cr-3Co-3Ni-0.1N. The alloy has stainless steel-type properties and exhibits high damping characteristics. The alloy, which has both an austentitic and a epsi-martensitic phase, can be melted, cast and rolled into sheets. Disk drive load beams cut from the sheet of alloy exhibit higher vibrational damping than materials currently used in the art.
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