Production Process of Abrasion-resistant Cast Iron Impeller
The structure and technical requirements of abrasion-resistant cast iron impeller castings were introduced.The production process of these castings was elaborated.By strictly controlling each production process and process parameters,the produced castings met the technical requirements in terms of dimensions,hardness,and metallographic structure.It was emphasized that:(1)When controlling the casting process,the key was controlling the deoxidation and deterioration of molten iron,unpacking time,pouring temperature and heat treatment process.Which were crucial for obtaining sound impeller castings.Unpacking time was a key factor that directly led to impeller cracks and must be strictly controlled.There were differences in unpacking time control between summer and winter.(2)Gas cutting should not be used for removing risers,instead,manual cutting with discs should be employed to avoid damage to the casting.
abrasion-resistant cast ironimpellerunpacking time
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