What is the difference between high speed steel and tungsten steel?

       What is the difference between high speed steel and tungsten steel?



High-speed steel is a kind of tool steel with high hardness, high wear resistance and high heat resistance, also known as wind steel or front steel, which means that it can harden even if it is cooled in the air during quenching, and it is very sharp. Some are also called white steel.



High-speed steel is an alloy steel with complex composition, containing carbide-forming elements such as tungsten, molybdenum, chromium, vanadium, and cobalt. The total amount of alloying elements is about 10 to 25%. When high-speed cutting produces high heat (about 500°C), it can still maintain high hardness, and the HRC is above 60. This is the main characteristic of high-speed steel red hardness. After quenching and low temperature tempering, carbon tool steel has high hardness at room temperature, but the hardness drops sharply when the temperature exceeds 200 °C. At 500 °C, the hardness is similar to the annealed state, and the ability to cut metal is completely lost, which limits the cutting tools of carbon tool steel. use. High-speed steel makes up for the fatal shortcomings of carbon tool steel due to its good red hardness.



High-speed steel is mainly used to manufacture complex thin-edged and impact-resistant metal cutting tools, as well as high-temperature bearings and cold extrusion dies, such as turning tools, drills, hob, machine saw blades and high-demand dies.



Tungsten steel (tungsten carbide) has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially high hardness and wear resistance, and it basically remains stable at a temperature of 500 °C. Change, high hardness at 1000 ℃.



Tungsten steel, the main components are tungsten carbide and cobalt, which account for 99% of all components, and 1% are other metals, so it is called tungsten steel, also known as cemented carbide, and is considered to be the teeth of modern industry.



Tungsten steel is a sintered composite material containing at least metal carbide. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, and tantalum carbide are common components of tungsten steel. The grain size of the carbide component (or phase) is typically between 0.2-10 microns, and the carbide grains are held together using a metallic binder. Binder metals are generally iron group metals, commonly used cobalt and nickel. Therefore, there are tungsten-cobalt alloys, tungsten-nickel alloys and tungsten-titanium-cobalt alloys.



Tungsten steel sintering is to press the powder into a billet, and then enter the sintering furnace to heat to a certain temperature (sintering temperature), keep it for a certain time (holding time), and then cool to obtain the necessary performance tungsten steel material.