The Role of Alloy Elements in White Heart Malleable Cast Iron
Whiteheart malleable iron, also known as whiteheart malleable iron, is a kind of cast iron based on pearlitic matrix and rare ductile iron. It is characterized by high strength, low hardness, large elongation and plasticity and impact toughness. In order to obtain excellent performance of white heart malleable cast iron, alloy elements are often added as trace element additives during the smelting process. Alloy elements in whiteheart malleable iron can improve its plasticity, processing and anticorrosion ability, especially its machinability.
Generally speaking, alloy elements will play different roles according to the characteristics of each alloy elements.
1、Nickel
Nickel can improve the strength, hardness, toughness and wear resistance of white heart malleable cast iron, and reduce its cold brittleness.At the same time,it can also improve the plasticity and machinability by suppressing graphitization and controlling the graphite shape.
2、Molybdenum
Molybdenum has high melting point and low density, which can greatly improve the strength and solid solubility of white heart malleable cast iron.It also increases hardness and wear resistance, enhances the adhesion and impact toughness of matrix pearlite, absorbs shock energy and improve the machinability of the castings.
3、Chromium
Chromium is a common element for deoxidization and desulfurization of cast iron.It can increase the solid solubility of carbon and improve the strength of white heart malleable cast iron.At the same time, chromium can improve the wear resistance, plasticity,sulphur resistance and machinability.
4、Manganese
Manganese is the main element of white heart malleable cast iron to improve strength, hardness and wear resistance.It can also improve the machinability of white heart malleable cast iron by controlling graphite morphology and improving the mechanical properties of the casting.
5、Silicon
Silicon is an important element for deoxidization and desulfurization of cast iron.It can reduce the shrinkage of white heart malleable cast iron and improve the plasticity, machinability and corrosion resistance of the castings.
6、Copper
In white heart malleable cast iron, copper is mainly used as an alloy element to improve plasticity, machinability and corrosion resistance.
7、Copper alloy
Copper alloy is the main element used to improve the machinability of white heart malleable cast iron.It can also improve the plasticity and wear resistance of the casting.
to conclude
Alloy elements are a very important factor to enhance the performance of white heart malleable cast iron.Nickel, molybdenum, chromium, manganese, silicon and copper are all commonly used alloy elements. They are used to improve the strength, hardness, wear resistance and machinability of the castings. In addition, they can improve the plasticity, shrinkage and corrosion resistance of the castings. Therefore, using the right alloy elements can bring great benefits to the application of whiteheart malleable cast iron.
