The main factors affecting the quality of cast iron parts

The main factors affecting the quality of cast iron parts

In the manufacture of castings, the quality of the castings must be controlled and inspected. First of all, we must formulate the technical rules and technical conditions for the control and inspection of raw materials and auxiliary materials to each specific product. The chemical composition of each batch of purchased materials was analyzed with a multi-element analyzer, and each process was controlled and inspected in strict accordance with the process codes and technical conditions. Pre-furnace detection is performed with an in-furnace carbon-silicon analyzer, and quality inspections of finished castings are made. Should be equipped with a reasonable detection method and suitable testing personnel. Generally, the appearance quality of professional cast iron parts can be used to determine the surface roughness of castings by comparison. The surface micro-crack can be examined by coloring method and magnetic powder method.

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Chemical composition of purchased materials is analyzed using a multi-element analyzer

Cast iron design process: When designing, in addition to the working conditions and metal material properties to determine the shape and size of cast iron parts, but also from the casting alloy and casting process characteristics to consider the rationality of the design, namely Obvious size effect and solidification, shrinkage, stress and other issues, in order to avoid or reduce the composition of the cast iron components segregation, deformation, cracking and other defects.

0eb30f2442a7d933bb47beabaa4bd11372f0017e.jpg Casting quality control and inspection

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Furnace detection with furnace carbon silicon analyzer


Reasonable casting process: According to the structure, weight and size of cast iron parts, casting alloy characteristics and production conditions, select the appropriate parting surface and modeling, core method, set reasonable casting ribs, cold iron, riser and pouring system, etc. . To ensure the quality of cast iron parts.

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Casting site inspection

The quality of raw materials used for casting: The quality of materials such as metal charge, refractory, fuel, flux, modifiers, and foundry sand, molding sand binders, coatings, etc., is not the same as the standard, and will cause blowholes, pinholes, inclusions, and sticky sand in cast iron parts. Such defects will affect the appearance quality and internal quality of cast iron parts, and when they are serious, the cast iron parts will be scrapped. The fourth is the process operation. It is necessary to formulate a reasonable process operation procedure and improve the technical level of the workers so that the process procedures can be implemented correctly.


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