技術(shù)指標(biāo) 氮化層深度:0.5-0.8mm Depth of nitration case:0.5-0.8mm 氮化硬度:950-1020Hv Hardness of nitration:950-1020Hv 氮化脆度:<=二級 Fragility of nitration: Less than grade 2 表面粗糙度:Ra 0.4um Roughness of the surface: Ra 0.4um 螺桿直線度:0.015mm Linearity of the screw:0.015mm 氮化后表面鍍硬烙硬度:>=950Hv The surface hard chromium plating hardness after nitrogenation : >=950Hv 鍍鉻層厚度:0.03-0.08mm Charome-plating layer thickness:0.03-0.08mm
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