本文主要介绍了卧式离心机铸造大直径铸钢套筒方法，讨论了降低套筒气孔和铸造裂纹的工艺措施。
Large diameter sleeve of steel casting by horizontal centrifugal casting machine has been introduced with discussion of technological measures of reducing pinhole and crack in sleeve.
采用中频熔炼、离心雾化凝固冷却得到铸态低碳铸钢丸，并对此进行相应回火处理得到不同硬度及寿命的低碳铸钢丸。
In this thesis, series of low carbon cast steel shot were successfully obtained by medium-frequency melting and centrifugal atomization technologies and temper were performed.
采用中频熔炼、离心雾化凝固冷却得到铸态低碳铸钢丸，并对此进行相应回火处理得到不同硬度及寿命的低碳铸钢丸。
In this thesis, series of low carbon cast steel shot were successfully obtained by medium-frequency melting and centrifugal atomization technologies and temper were performed.
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