摘要
研究了球墨铸铁模板的化学成分、基体组织、硬度、铸造工艺、热处理等对其切削加工性能的影响。模板化学成分不合理、形成碳化物元素含量过高、模板中含有高熔点的夹杂物、局部的白口和反白口、未熔尽残留物、硬度不均匀等材料原因,以及铸造工艺方面的冷却速度、开箱温度、铸件尺寸精度超差和不稳定、刀具和切削用量不合适等非材料因素均可能引起切削问题。提出了从熔炼入手,控制炉料质量、控制形成硬质点的合金元素加入量、消除夹杂物、提高基体组织的均匀性、严格控制铸造工艺过程等解决措施,以获得良好的切削加工性能。
The effects of chemical composition, matrix structure, hardness, casting process and heat treatment on the machinability of ductile iron templates were studied. Template chemical composition is not reasonable, high content of carbide formed elements, template contains high melting point inclusion and partial chill and reverse chill, not melting residues, uneven hardness of the materials, and casting speed, cooling box temperature, casting dimension accuracy out-of-tolerance and unstable, cutting tool and cutting parameter improper cutting factors other than materials are likely to cause problems. In order to avoid these problems, some measures are put forward, such as controlling the quality of original materials, controlling the amount of alloying elements, removing inclusions, improving the uniformity of matrix structure and strictly controlling the casting process.
作者
陈永成
柯志敏
何良荣
CHEN Yongcheng;KE Zhimin;HE Liangrong(Guangdong Zhongtian Chuangzhan Ductile Iron Co., Ltd., Yingde 513000, China;Guangdong Research Center for High Performance Large Castings Manufacturing and Simulated Engineering Technology,Yingde 513000,China)
出处
《铸造技术》
CAS
2019年第6期625-629,共5页
Foundry Technology
关键词
切削加工性能
化学成分
组织结构
硬度
铸造工艺
热处理
cutting performance
chemical composition
microstructure
hardness
casting process
heat treatment
