| 摘要 |
PURPOSE:To improve the wear resistance of a material to be treated without losing the magnetic characteristics by subjecting the material to annealing in vacuum, specified pretreatment for plating and electroless chemical Co-P plating. CONSTITUTION:Precision parts made of soft magnetic silicon steel are annealed in vacuum so as to obtain desired magnetic characteristics and to prevent the formation of oxide films on the surfaces. The parts are pretreated by degreasing with an org. solvent, degreasing with alkali, pickling and treatment for removing silicon oxide with a mixed acid-inhibitor soln. The parts are then subjected to electroless chemical Co-P plating. |
