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通过全面对比分析德国产与国产轴套样件的材质性能,找出了国产轴套的失效原因是由于Pb相严重偏析以至聚集呈球状导致性能严重下降所致。采用顶置雨淋式浇注系统、自硬砂重力铸造工艺,成功地生产出性能达到或高于德国技术指标的铅青铜轴套。
Through a comprehensive comparative analysis of the material properties of German-made and domestic bushings samples, it is found that the failure of domestic bushings is due to the serious segregation of Pb phases and the aggregation of spheroidal balls resulting in a serious decrease in performance. Adopting roof rain casting system and self-hardening sand gravity casting process, the lead bronze bushings with performance up to or above German technical index are successfully produced.