Grey iron and ductile iron are two of the most commonly used materials in the manufacturing industry. While they may look similar, they have distinct differences in their properties and applications. In this article, we will explore the differences between grey iron and ductile iron.
Steel casting products are widely used in various industries due to their excellent mechanical properties and durability. In this article, we will discuss the application of steel casting products in different fields.
Ductile Iron was unearthed from the iron smelting sites of the middle and late Western Han Dynasty in Tieshenggou, Gong County, Henan Province. The modern Ductile Iron was not successfully developed abroad until 1947. Cast iron in ancient China had a low silicon content for a long time. In other words, during the Western Han Dynasty about 2,000 years ago, the spheroidal graphite in Chinese ironware had been softened by low-silicon pig iron castings. Obtained by annealing method. This is a major achievement of ductile iron casting technology in ancient China and a miracle in the history of world metallurgy.
Ductile iron is spheroidized and inoculated to obtain spheroidal graphite, which effectively enhances the mechanical function of cast iron, especially strengthens plasticity and resistance, so as to obtain higher strength than carbon steel. Ductile iron has rapidly developed into a very widely used cast iron material second only to gray cast iron.
The carbon content of gray cast iron is relatively high, and it can be regarded as a carbon steel matrix with flake graphite. According to the different matrix structure, gray cast iron can be divided into three categories:1. Ferritic matrix gray cast iron;2, pearlitic ferritic matrix gray cast iron;3, pearlite matrix gray cast iron.
The application range of coated sand is very wide, and its process methods are not the same, whether it is modelling or core making, the basic process requirements of coated sand are: the heating temperature should be between 200-300 °C, the curing time should be about 30-150s, and the pressure of sand shooting should also be between 0.15-0.6Mpa, except for wet manual classes. The specific parameters can be adjusted according to the corresponding equipment model, complexity and type (core) weight and the type of coated sand, etc., the principle of adjustment of coated sand casting manufacturers is: if it is a simple sand core and the fluidity is better or the particle size is relatively coarse, you can choose a relatively low sand injection pressure, if it is a thin sand core, you can choose a relatively low heating temperature, and when the heating temperature is low, you can appropriately extend the curing time, and vice versa.
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