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Performance test of gray cast iron

1. Hardness test The sampling position of the hardness sample of the gray cast iron cylinder block is shown in Figure 1. The hardness test of the cylinder position needs to test the hardness for 3-4 times at equal intervals to test whether the hardness distribution of the cylinder...

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Production of gray cast iron castings

Figure 1 shows the model and production flow chart of a high-strength gray cast iron engine cylinder block. The main processes include raw material ratio, baking process, molding, core making process, pouring process and post-treatment process: (1) Ingredients; The ingredients are divided into raw materials and auxiliary materials. According...

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Matrix texture and graphite state in gray cast iron

Gray cast iron is mainly composed of matrix structure and graphite, and others include eutectic, carbide and cementite eutectic. Its microstructure determines its performance. When observing its metallographic structure, it is mainly analyzed and studied from the aspects of flake graphite, metal matrix and eutectic at grain boundary. The...

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Solidification process of gray cast iron

Cast iron generally refers to multi-component iron carbon alloy with C content of 2.0% (wt%, the same below) W. Generally, the C content of industrial cast iron is 2.5-3.5%. C exists in gray cast iron in the form of W graphite and a small amount of W PA C....

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Overview of gray cast iron

Gray cast iron is the most widely used cast iron at present. It is named for its gray section color. In addition to the highest content of Fe, there are also C, Si, Mn, P, s and other elements in gray cast iron; Among them, C, Si and Mn...

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Gray cast iron dry sand lost foam casting

The filling process of lost foam casting has a decisive influence on the quality of castings. Due to the existence of foam pattern, gasification decomposition and the interaction between decomposition products and molten metal, the filling process of molten metal and the generation and control of casting defects are...

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