Introduction
Cr12MoV8MnSi alloy is a kind of cold-work die steel, which is a typical Mo alloy steel. It has a balanced performance of edge holding ability, wear resistance and overall performance. The alloy features high hardness, good abrasion resistance, good thermal behaviour and easy machinability. It has good hardenability and its quenching hardness is also very high, so it is suitable for cold working die were high toughness and strength are required.
Properties and Application
Cr12MoV8MnSi alloy contains carbon and molybdenum. The C content of steel is about 1.50%, and the Mo content is about 0.60%. The carbon and molybdenum melts form a hard martensite phase, which is the basis of the excellent performance of Cr12MoV8MnSi alloy. In addition, Cr12MoV8MnSi alloy contains some other trace elements, such as manganese and silicon, which play an important role in improving the wear resistance and thermal fatigue of die steel.
Cr12MoV8MnSi alloy has high mechanical properties and good overall performance. It can be used for processes such as hot forging, cold rolling and extrusion at temperatures of 300°C or higher. The hardness of M2 steel is higher than HRC60, but it has poor corrosion resistance due to its high carbon and chromium content, so it needs to be protected before and after use.
Cr12MoV8MnSi alloy can be used for manufacturing tools and dies for cold working such as cold heading, cold extrusion, cold punching, and cold stretching die, etc. Cr12MoV8MnSi alloy cold-work tools and dies are widely used for forming and cutting various materials, such as brass, aluminum, alloy steel and ordinary steel. The performance of this alloy is similar to that of WngMn7 and HMn6 cold-work dies.
Heat Treatment
Cr12MoV8MnSi alloy has good hardenability and can be hardened and tempered much higher than ordinary alloy steel. The heat treatment process of Cr12MoV8MnSi alloy mainly includes annealing and quenching. The annealing temperature should be 910℃-930℃, and the alloy should be heated slowly and uniformly, then natural cooling after heat preservation; Quenching should be carried out at a temperature of 830-880℃, then quickly cooled in the air, and the hardness after quenching reaches HRC60-63. After quenching, tempering is carried out at the temperature of 260-380℃ to obtain the desired mechanical properties.
Conclusion
Cr12MoV8MnSi alloy is a typical Mo alloy die steel, which has excellent cutting performance and abrasion resistance. This alloy has a balanced performance of edge holding ability, wear resistance and overall performance. It is widely used for cold working tools and dies such as cold heading, cold extrusion, cold punching, and cold stretching die, etc. The heat treatment process of Cr12MoV8MnSi alloy mainly includes annealing and quenching, and then tempering at the temperature of 260-380℃ to obtain the desired mechanical properties.
