| 摘要 |
The purpose of the present invention is to provide a method for reducing the surface roughness and deformation of gray cast iron parts, the method capable of improving the defects of surface roughness due to a porous layer (Fe2N of an epsilon phase) which may be produced during the heat treatment of gray cast iron materials without a post-process or a micro preprocess. The method for reducing the surface roughness and deformation of gray cast iron parts according to the present invention achieves its purpose by comprising a step for performing finishing to obtain a processing dimension of the parts within the range of -1 to 0 mm based on the criteria of complete products before surface heat treatment of the gray cast iron parts; a step for suppressing Fe2N maximally by plasma-ionnitriding the finished gray cast iron parts; and a step for grinding the Fe2N on the surface of the parts after the surface heat treatment. The method for reducing the surface roughness and deformation of gray cast iron parts reduces a gas pocket layer by maximally suppressing the Fe2N of an epsilon phase, thereby minimizing the surface roughness and deformation. [Reference numerals] (AA) Roughing;(BB) Finishing;(CC) Ionnitriding;(DD) Oxidation;(EE) Grinding or honing;(FF) Surface treatment (Brushing) |
