离心铸造辊件裂纹缺陷的预防措施

Cracking Prevention Measures of Centrifugally Cast Rollers

用离心铸造方法生产辊类铸件的主要缺陷是裂纹。分析了裂纹的特征及产生原因,提出了防止裂纹产生的六条措施:离心机空车转动不允许出现跳动声响;金属型模具烘烤温度要均匀;金属型模具的选材与壁厚要适当匹配;铸型转速要合适;不同铸型宜选择不同的浇注温度;操作者要严格执行工艺纪律。

Cracking is the main defect of roller castings cast centrifugally. The characteristics of cracks and the reason caused crack was analyzed, and 6 measures to avoid crack formation was proposed as follows： no flopping sound permitted during idle running of the centrifugal machine; the metal mould should be preheated uniformly; the material choice of the metal mould should match its wall thickness properly; rotating speed of the mould should be proper; different pouring temperature should be adopted for different moulds; operator should observe operation procedure.