本文以大量翔实的试验数据研究 Sofim 发动机凸轮轴心部硬度高于进口毛坯的原因,在分析国内外冷激凸轮轴材质的基础上,提出以高碳、较低 Si 量的 Cu、Cr 合金铸铁来生产 Sofim 凸轮轴,改善中心轴孔的加工性能,经反复针对性试验获得了满意的机械性能和加工性能的 Sofim 凸轮轴。 In this paper, a large number of informative experimental data to study Sofim engine camshaft core hardness is higher than the imported rough reason, the analysis of domestic and foreign cold-camshaft material, based on the proposed high-carbon, low Si Cu, Cr alloy cast iron Sofim camshafts to produce Sofim camshafts, to improve the machining properties of the central shaft bore, and to obtain satisfactory mechanical and processing properties through repeated targeted tests.