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Study on the casting technology of nodular cast iron into cylinder

According to the analysis of the casting structure and key casting technology difficulties of the intake cylinder, this paper mainly focuses on the theoretical research, design and calculation of the core casting technology scheme and process of the intake cylinder, and determines the final optimization process technology scheme. In...

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Research status of large nodular iron castings

According to the data reported by China Foundry Association at the industry annual meeting in recent years, the total amount of nodular cast iron castings has increased by about 5% in recent years. In 2016, the total amount of ductile iron castings reached 13.2 million tons, which was higher...

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Production status of large nodular iron castings

Ductile iron is an important kind of strong and tough cast iron, which has been fully used in heavy and large load-bearing structural parts such as engineering machinery, energy machinery, national defense and military industry. Especially in the environment with high requirements for plasticity, toughness and anti-seismic wear resistance,...

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Improvement measures and effect of nodularization of nodular cast iron

After the casting spheroidization problem appeared, our company’s technical, quality, physical and chemical department and other departments jointly analyzed, according to the actual production, the rectification measures were determined. 1) Standardize the operation procedures and control the pouring time. 2) Adjust the blowing in sequence, the first furnace smelting...

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Analysis of spheroidization of nodular cast iron

After the occurrence of bad nodularity, our plant strengthened the detection of sulfur in the original molten iron and the molten iron after spheroidizing treatment, as well as the control of the use of recycled materials to prevent such problems. In order to produce high quality nodular iron castings,...

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Present situation of poor spheroidization of nodular cast iron

In the production process of nodular iron castings, in order to ensure the product quality, the tensile strength, yield strength, elongation after fracture and spheroidization rate of the test block attached to the same furnace must be within the range of the material grade requirements. This requirement must be...

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Welding repair of nodular iron castings

The graphite of ball milled cast iron exists in the form of spheroid, which reduces the cleavage effect on the matrix, and the utilization rate of the matrix can reach 70-90%. Compared with other cast iron, ball milled cast iron has high strength, plasticity and toughness, high yield strength,...

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