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Determination of chemical composition of large nodular cast iron roll

The chemical composition of nodular graphite casting not only directly affects the mechanical properties of nodular graphite casting, but also affects the process properties such as fluidity and shrinkage. For ferritic nodular iron castings with high requirements, the principle of “high carbon, low silicon, low manganese, low sulfur, low...

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Technology of large nodular cast iron roll

The important roll part of an equipment, which was originally a welded part, is now changed into a ductile iron part for trial production. According to the customer’s requirements, the material shall comply with DIN en1563:2012-3 casting – ductile iron, brand en-gjs-400-18u-rt, and the size of cast test block...

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Melting process of large nodular cast iron roll

1. Selection of raw materials High quality raw materials are required for the production of as Cast High Toughness Nodular Cast iron. Generally, high-purity pig iron with low manganese, low phosphorus and low sulfur shall be selected. In particular, the content of impurity elements such as Ti, V, Cr,...

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Casting technology of nodular cast iron support casting

The heavy truck rear axle leaf spring support is the key component connecting the leaf spring and the frame. It supports the leaf spring and transmits the force from the leaf spring to the frame. Its structural strength directly affects the driving safety of the vehicle. Therefore, the ductile...

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Cause analysis of shrinkage porosity of nodular iron castings

Nodular cast iron solidifies in “paste”. Compared with gray cast iron, eutectic solidification time is long, the number of eutectic clusters is large, and the solidification expansion pressure is large. These solidification characteristics are the fundamental reason for shrinkage porosity. The formation of shrinkage porosity of nodular iron castings...

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Shrinkage porosity of nodular iron castings of wind turbine unit

The operation environment of wind turbine is relatively bad, and the supporting large parts should be used for a long time under wind load, impact, low temperature and other working conditions. Therefore, they need to have the advantages of good mechanical properties, low temperature impact resistance, good shock absorption...

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