High speed steel roll ring manufacturers: what are the commonly used high speed steel
High-performance high-speed steel by adjusting the basic chemical composition and adding other alloying elements, can be used to cut high-strength steel, high-temperature alloys, titanium alloys and other difficult-to-process materials, so that its performance than ordinary high-speed steel to improve a step. There are mainly the following:
High speed steel roll ring manufacturer: high carbon high speed steel
The mass fraction of high-speed steel is increased to 0.9-1.05%, which makes the alloy elements in the steel form carbides, thereby improving the hardness, wear resistance and heat resistance of the steel. But its strength and toughness decreased slightly.
High speed steel roll ring manufacturer: 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 steel is more difficult than ordinary high-speed steel.
High speed steel roll ring manufacturer: cobalt high speed steel
Cobalt high-speed steel is a kind of 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. Can be used for cutting high temperature alloy, stainless steel and other refractory materials.
High speed steel roll ring manufacturer: 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 decline 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 tendency of oxidation and decarburization 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: high-carbon high-alloy steel, according to the chemical composition can be divided into tungsten steel and molybdenum steel, according to the cutting performance can be divided into ordinary high-speed steel and high-performance high-speed steel. 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 steel (hardness up to 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 cutting edge after grinding, stable quality, generally used in the manufacture of small and complex shape of the tool.
Cemented carbide: It is a powder of micron-level 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 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 that of high-speed steel. High cutting efficiency.
The disadvantage is low bending strength, poor impact toughness, brittleness, low impact and vibration resistance.