， Manganese silicon alloys, also known as manganese silicide alloy, is a type of alloy of transition elements. The transition elements mainly contain manganese, silicon and other nine kinds of transition elements including cobalt, nickel, titanium, zirconium, aluminum, chromium, vanadium, molybdenum and tungsten.
Manganese silicon alloys are mainly used in the automotive, electronics and machinery industries, mainly because of its excellent mechanical and physical properties. For example, manganese silicon alloys can resist high temperatures, have relatively low thermal embrittlement, strength, and tensile strength, superior wear resistance and ice adhesion, and can withstand static and dynamic loading. In short, manganese silicon alloys can meet the needs of various types of components.
The manganese silicon alloy produced in China is mainly produced according to national standard GB/T4008-1996, which contains several grades of manganese silicon alloy. All manganese silicon alloys have different composition, microstructure and properties, which determine they can be used in different fields. For example, the manganese silicon alloy with unbalanced composition, high hardness and compressive strength, is suitable for making high-load parts and surfaces under severe loading; those manganese silicon alloy with balanced composition, low hardness, compressive strength and low thermal expansion, is suitable for producing parts requiring precise dimension.
In general, the manganese silicon alloy contains 4.75-28% silicon, 0.90-15.0% manganese and other transition element, and each of the other transition element is not more than 0.80%. The purpose of adding other transition element is to adjust the properties of manganese silicon alloy, such as strength, corrosion resistance and thermal stability.
Usually, the manganese silicon alloy is made of the mixed powder of manganese, silicon and other transition elements, and then formed in the high temperature furnace and becomes solid piece. During the process of solidification, different microstructures, such as martensitic, austenitic and hypereutectic microstructures, are formed, which can be adjusted according to needs.
Martensite is the most stable phase of manganese silicon alloy, and it represents supersonic brittleness and high hardness. This phase is mainly used in the production of punching, rolling and wire-drawing die. Austenite are mainly used in the production of automobile and engine components, due to its fatigue resistance, good thermal stability, superior ductility and good machinability. Hypereutectic manganese silicon alloys have the highest strength and wear resistance, mainly used to resistant to wear and corrosion and making complex or precision parts.
In conclusion, manganese silicon alloys, produced according to national standard GB/T4008-1996,can be divided into four main grades, and these manganese silicon alloys have different composition, microstructure and properties and can be produced according to customers needs. The excellent mechanical and physical properties make manganese silicon alloys widely used in the automotive, electronics and machinery industries.
