Abstract
Abstract With the continuous development of metal manufacturing technology, high-strength and high-hardness ductile iron materials have excellent comprehensive performance. Many performance indexes are comparable to those of alloy steels, and they have excellent casting properties. Many large-scale parts produced by cast steel are slowly being replaced by this material. Ductile iron is obtained by a spheroidizing treatment and inoculation to obtain spheroidal graphite. The mechanical properties of cast iron have been effectively improved, especially plasticity and toughness, and the strength obtained is higher than that of carbon steel. Ductile iron has the properties of iron and the properties of steel. It is a new type of engineering material with high plasticity, strength, corrosion resistance, and wear-resistance. Because of its excellent performance, it has been successfully used to cast parts with high-stress conditions, high strength, toughness and wear resistance. Due to the small splitting effect of ductile iron on the metal matrix, the stress concentration is effectively eliminated. Therefore, the matrix structure of ductile cast iron is changed by heat treatment, thereby improving its mechanical properties and the damping performance of the material itself. Through a heat treatment process experiment of ductile iron, the related process and technical measures of damping performance in the heat treatment production process are obtained.
Highlights
With the continuous development of metal manufacturing technology, high-strength and high-hardness ductile iron materials have excellent comprehensive performance
Damping performance is a critical factor in the heat treatment of ductile iron, and it is essential to pay attention to this aspect of the technology, which is related to the quality of the heat treatment process
When observed by electron microscopes with wavelengths of 20μm and 100μm respectively, it can be found in Figure 3(a) and Figure 3(b) that the crystals of ductile iron are large, the overall trend is not much different from the heat treatment, and they all appear as granules
Summary
Abstract: With the continuous development of metal manufacturing technology, high-strength and high-hardness ductile iron materials have excellent comprehensive performance. The matrix structure of ductile cast iron is changed by heat treatment, thereby improving its mechanical properties and the damping performance of the material itself. The cast iron metallurgy industry has developed rapidly, especially the heat treatment technology of ductile iron. It is a new material product which is low in cost and better to craft. Damping performance is a critical factor in the heat treatment of ductile iron, and it is essential to pay attention to this aspect of the technology, which is related to the quality of the heat treatment process. If these are not eliminated in time, it is easy to crack the parts during use or cutting, which affects the quality of the product [2]
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