Effect of martensite volume fraction on mechanical properties and wear resistance of hot-rolled high-strength steel
Martensite is a highly ordered, nano-structured steel that is produced by the rapid cooling of a furnace-heated sheet of steel. This results in a unique combination of strength, toughness, and wear resistance, making it an ideal material for high-performance applications. Martensite is the most widely used steel in the automotive, aerospace, and defense industries.
In hot-rolled high-strength steel, the presence of martensite enhances the properties of the material significantly, leading to greater strength, toughness, and wear resistance. To impart these mechanical and wear properties, it is necessary to control the martensite volume fractions (MVF) in the steel. The relationship between the MVF and mechanical and wear properties of the hot-rolled high-strength steel have been studied extensively.
Effect of Martensite Volume Fraction on Mechanical and Wear Properties of Hot-Rolled High-Strength Steel:
The mechanical properties of hot-rolled high-strength steel are highly sensitive to the MVF in the material. The higher the MVF, the higher the strength, toughness, and wear resistance of the steel. When the MVF increases, the hardness, yield strength, tensile strength, fatigue strength, and toughness also increase. This can be seen in Figure 1.
Relationship between the Martensite Volume Fraction and the Mechanical Properties of Hot-Rolled High-Strength Steel
When the MVF of hot-rolled high-strength steel increases, the wear resistance of the material also increases significantly. As the MVF increases, the surface hardness and wear resistance of the steel improve. Figure 2 shows the relationship between the MVF and wear resistance of the hot-rolled high-strength steel.
Relationship between the Martensite Volume Fraction and the Wear Resistance of Hot-Rolled High-Strength Steel
The martensite volume fraction of hot-rolled high-strength steel has a significant effect on the mechanical properties and wear resistance of the material. As the MVF increases, the strength, toughness, and wear resistance of the steel also increase significantly. To attain the desired mechanical and wear properties of hot-rolled high-strength steel, it is important to control the MVF. For this purpose, various thermal-induced treatments can be applied to the steel to impart higher MVF.
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