Differences and advantages of high-speed steel and carbide
High-speed steel: is a high-carbon, high-alloy steel, according to the chemical composition can be divided into tungsten system, molybdenum system steel, according to the cutting performance is divided into ordinary high-speed steel, high-performance high-speed steel. High-speed steel must be strengthened by heat treatment. In the quenched state, high-speed steel in the iron, chromium, part of the tungsten and carbon to form extremely hard carbide, can improve the wear resistance of steel (hardness up to HRC64 - 68). Another part of the tungsten dissolved in the matrix, increasing the red hardness of steel. High-speed steel red hardness can reach 650 degrees.
High-speed steel strength, toughness are good, sharpened cutting edge, quality and stability, generally used in the manufacture of small, complex shape of the tool.
Cemented carbide: is micron-scale refractory high hardness metal carbide powder, with cobalt, molybdenum, nickel, etc. to do the binder, burned at high temperature and high pressure.
The high temperature carbide content in Cemented Carbide exceeds that of high speed steel, with high hardness (HRC75--80) and good wear resistance.
The red hardness of Cemented Carbide can reach 800-1000 degrees. The cutting speed of Cemented Carbide is 4--7 times higher than HSS. Cutting efficiency is high.
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