Production status and trends of cast iron castings

Production status and trends of cast iron castings

The production status and trend of world cast iron parts is that the proportion of gray cast iron parts has significantly decreased, but still occupies a dominant position. The production of ductile iron castings continues to grow, and there has been significant development in ductile iron and special cast iron. The production of gray cast iron has been decreasing year by year, but the proportion of cast iron in cast iron is increasing. Strengthening experimental research on gray cast iron is undoubtedly the development direction of gray cast iron in China.

China's total production of malleable iron ranks among the top in the world, but the demand will also increase. Therefore, in the future, there will be great development in China's malleable bent plate cast iron.

At present, the main gap in the production of malleable cast iron in China is that there are few varieties and black core malleable cast iron; Poor quality; Backward galvanizing process; Lack of ideal low energy consumption, good insulation, and low pollution annealing furnaces. Despite the decrease in cast iron production, the proportion of ductile iron in cast iron castings is still increasing. In the developed West, ductile iron castings are commonly used to replace some gray cast iron and malleable iron castings. The production of ductile iron castings in China is relatively low, and the proportion of cast iron castings is much smaller than that of developed countries. In addition, there is a significant gap in the quality and production stability of ductile iron castings in China.

The prominent problem in the production of ductile iron in China is the strength and toughness of the material, with many defects. In addition to factors such as furnace charge, spheroidization treatment method, and spheroidizing agent, the main reason is that the sulfur content in the molten iron is too loose before spheroidization treatment. Therefore, in order to achieve a significant increase in the production of ductile iron in China, we will vigorously implement supporting technologies for ductile iron castings that can provide stable supply.

Precision machining