What are the commonly used high performance high speed steels?
High-carbon high-speed steel high-carbon high-speed carbon steel mass fraction increased to 0.9%-1.05%, so that the alloying elements in the steel combined part of the formation of carbides, thereby improving the hardness, wear resistance and heat resistance of steel. However, its strength and toughness decreased slightly.
High vanadium high-speed steel high vanadium high-speed steel vanadium mass fraction increased to 3% -5%. Due to the increase of vanadium carbide, from the surface of the steel to improve the wear resistance, generally used for cutting high-strength steel. However, the sharpening of this steel is more difficult than ordinary high-speed steel.
Cobalt high-speed steel cobalt high-speed steel is added to the high-speed steel cobalt, can improve the high temperature hardness and oxidation resistance of high-speed steel. Therefore, it can improve the cutting speed. The most widely used grade is M42, its comprehensive performance is good, high hardness, grindability is also good. It can be used for cutting high-temperature alloys, stainless steel and other difficult-to-machine materials.
Aluminum high-speed steel aluminum high-speed steel is our original new steel. Add a small amount of aluminum in high-speed steel, can improve the heat resistance and wear resistance of steel, but also can prevent the high carbon caused by the decline in strength and toughness. Aluminum high-speed steel performance close to foreign cobalt high-speed steel M42, the price is also much cheaper. However, the quenching temperature of aluminum high-speed steel is narrower, and the tendency of oxidation decarburization is serious, therefore, it is necessary to strictly master the heat treatment process.
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