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These things did, can improve the mechanical properties of the nodular cast iron are difficult!

by:BoQiao Machinery     2020-11-25
Ductile cast iron is spherical graphite is obtained by spheroidization and inoculation, effectively improve the mechanical properties of cast iron, below small make up on say, the matters needing attention in the production of ductile iron casting. 1, strict with chemical composition, the original requirements of carbon and silicon content in liquid iron is higher than gray cast iron, manganese in lower nodular cast iron, phosphorus, sulfur content; 2, liquid iron melt temperature is higher than in gray cast iron, to compensate for the ball, inoculation liquid iron temperature of loss; 3, spheroidizing treatment, namely nodulizing agent is added to iron liquid; 4 inoculation, adding nucleating agent; 5, ductile iron castings liquidity is poorer, shrinkage is bigger, so you need a higher pouring temperature and the larger size of pouring system, riser, reasonable application of cold iron, in a sequential solidification principle; 6, heat treatment. Adhere to the principle of 'quality first, good faith management idea, the attitude of responsible for the customer, hope to cooperate with you together, win-win cooperation!
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