High-speed steel roll ring manufacturers: what are the commonly used high-speed steels and the advantages and disadvantages of high-speed steel
High-speed steel roll ring manufacturers: what are the commonly used high-speed steel
High-performance high-speed steel can be used to cut difficult-to-machine materials such as high-strength steel, high-temperature alloy, and titanium alloy by adjusting the basic chemical composition and adding other alloying elements, making its performance one step higher than that of ordinary high-speed steel. There are mainly the following:
High-speed steel roll ring manufacturers: high-carbon high-speed steel
The mass fraction of high-speed steel is increased to 0.9%-1.05%, which makes the alloying elements in the steel form carbides, thereby improving the hardness, wear resistance and heat resistance of the steel. However, its strength and toughness decreased slightly.
High-speed steel roll ring manufacturers: high-vanadium high-speed steel
The mass fraction of vanadium in high vanadium high speed steel is increased to 3%-5%. Due to the increase of vanadium carbide, the wear resistance of steel is improved, and it is generally used for cutting high-strength steel. But the sharpening of this kind of steel is more difficult than that of ordinary high-speed steel.
High-speed steel roll ring manufacturers: cobalt high-speed steel
Cobalt high-speed steel is a high-speed steel containing cobalt, which can improve the high-temperature hardness and oxidation resistance of high-speed steel. Therefore, the cutting speed can be increased. The most widely used brand is M42, which has good comprehensive performance, high hardness and good grindability. It can be used to cut refractory materials such as high temperature alloys and stainless steel.
High-speed steel roll ring manufacturers: aluminum high-speed steel
Aluminum high speed steel is a new type of steel. Adding a small amount of aluminum to high-speed steel can improve the heat resistance and wear resistance of the steel, and can also prevent the decrease in strength and toughness caused by high carbon. The performance of aluminum high-speed steel is close to that of foreign cobalt high-speed steel M42, and the price is much cheaper. However, the quenching temperature of aluminum high-speed steel is narrow, and the oxidation decarburization tendency is serious, so it is necessary to strictly master the heat treatment process.
High-speed steel roll ring manufacturers: the advantages and disadvantages of high-speed steel
High-speed steel: It is high-carbon and high-alloy steel, which can be divided into tungsten steel and molybdenum steel according to chemical composition, and ordinary high-speed steel and high-performance high-speed steel according to cutting performance. High-speed steel should be strengthened by heat treatment. In the quenched state, iron, chromium, part of tungsten and carbon in high-speed steel form extremely hard carbides, which can improve the wear resistance of the steel (hardness can reach HRC 64-68). Another part of the tungsten dissolves in the matrix, increasing the red hardness of the steel.
The red hardness of high-speed steel can reach 650 degrees.
High-speed steel has good strength and toughness, sharp edges and stable quality after sharpening, and is generally used to manufacture small and complex-shaped knives.
Cemented carbide: It is a powder of micron-scale refractory high-hardness metal carbide, made of cobalt, molybdenum, nickel, etc. As a binder and fired at high temperature and pressure. The content of high-temperature carbides in cemented carbide is higher than 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 that of high-speed steel. High cutting efficiency.
The disadvantages are low flexural strength, poor impact toughness, high brittleness, and low impact and vibration resistance.