Metallography of 60Si2Mn and 35CrMoV6Mo5Cr4V2
Metallography, also known as physical metallurgy, is to study and analyse the microscopic structure of metals and other materials. It is an important technique for understanding how an alloy behaves and its composition. This paper will discuss the metallography of two commonly used materials, 60Si2Mn and 35CrMoV6Mo5Cr4V2, as well as their properties and applications.
60Si2Mn is an alloy of manganese, oxygen and silicon, with Si and Mn being the major elements. It is usually in the form of a steel bar, with a carbon content of 0.50 to 0.70 percent and a chromium content of 0.30 to 0.60 percent. It has an excellent combination of toughness, wear resistance and ductility, making it a preferred material in many applications. It is often used for springs and other parts requiring high fatigue strength, as well as construction and automobile industries.
The metallography of 60Si2Mn is mostly composed of ferrite, which is formed mostly from the manganese and silicon contents. The ferrite grains are stacked up in an alternating manner, with one form of grain being present in the centre and the other forming a circular pattern. It is also present in the large grain sizes, which provide good wear resistance and tensile strength. The carbon content influences the micro structure of the material, forming numerous small carbides between the ferrite grains. This prevents the material from tearing and cracking, and adds to the wear resistance of the alloy.
35CrMoV6Mo5Cr4V2 is a commonly used alloy to produce engine valves, crankshafts and other parts in the automotive industry. It is an alloy of chrome, molybdenum, vanadium and chromium with an approximate content of 34-37% chrome, 0.2-0.6% molybdenum, 0.2-0.6% vanadium and 1% chromium. The addition of molybdenum and vanadium improves the strength of the alloy, resulting in higher strength and better wear resistance.
The metallography of 35CrMoV6Mo5Cr4V2 is composed of both ferrite and pearlite, with the ferrite content being higher than the pearlite. The ferrite grains form a heterogeneous microstructure, with both large and small grains being present. This provides good strength and toughness to the material. The pearlite is formed from the addition of smaller amounts of carbon and chrome. The carbon, chrome and molybdenum increase the corrosion resistance of the alloy.
In conclusion, the metallography of 60Si2Mn and 35CrMoV6Mo5Cr4V2 provide excellent properties that make them suitable for many applications. They both have excellent wear resistance and tensile strength, making them suitable for parts and components that must operate under high stress and fatigue. Furthermore, the addition of different elements also has a significantly positive impact on the properties of the alloys.
