High-speed steel
High-speed steel (HSS) is a high hardness, high wear resistance and high heat resistance tool steel . It can cure when air-cooled and is very sharp, also known as white steel.
high-speed steel is an alloy steel with complex components, including carbide-forming elements such as tungsten, molybdenum, chromium, sodium, cobalt, etc. The total amount of alloy elements is about 10-25%. At around 500℃, high hardness can still be maintained and high-speed cutting can be achieved.
Carbon tool steel has a high hardness at room temperature, and its hardness drops sharply at above 200°C. At 500°C, the hardness is reduced to a similar extent to annealing , limiting the use of carbon tool steel for cutting tools. Due to its excellent red hardness, high-speed steel makes up for the fatal shortcomings of carbon tool steel.
High-speed steel is mainly used to manufacture complex thin blades and impact-resistant metal cutting tools, as well as high-temperature bearings and cold extrusion molds, rotary tools, drills, hobs, mechanical saw blades and high-demand molds.
tungsten steel
tungsten steel ( cemented carbide ) has high hardness, wear resistance, excellent strength and toughness, heat resistance, corrosion resistance, especially its excellent characteristics such as hardness and wear resistance. Even if it is basically unchanged at 500°C, it has a high hardness at 1000°C.
Tungsten steel is mainly composed of cemented carbide and cobalt, accounting for 99% of all components, and 1% is other metals, so it is called cemented carbide and is considered to be the teeth of modern industry.
Tungsten steel is a sintered composite material containing at least one metal carbide. tungsten carbide , cobalt carbide, nickel carbide, titanium carbide , tantalum carbide are common ingredients of tungsten steel. The particle size of the carbide component (or phase) is usually between 0.2 and 10 microns, and the carbide particles are combined with the metal binder. The bonded metal is generally iron group metal, generally cobalt and nickel. Therefore, there are tungsten-cobalt alloys, tungsten-nickel alloys, and tungsten-titanium-cobalt alloys.
tungsten steel is sintered, the powder is pressed into the steel billet, and heated to a certain temperature in the sintering furnace ( sintering temperature ), held for a period of time (holding time), and cooled to obtain the required tungsten steel material.
(1), tungsten-cobalt cemented carbide
main components are cemented carbide (WC) and binder cobalt (CO).
(2), tungsten titanium cobalt carbide
main components are tungsten carbide, titanium carbide (tic) and cobalt.
(3) Tungsten-titanium-titanium (nickel) Cemented Carbide
main components are tungsten carbide, titanium carbide, tantalum carbide (or nickel carbide) and cobalt.
What is the difference between tungsten steel and high-speed steel?
1, different characteristics
High-speed steel (hss) is a tool steel with high hardness, wear resistance and heat resistance.
Tungsten steel (cemented carbide) has excellent characteristics such as high hardness, wear resistance, excellent strength, toughness, heat resistance, and corrosion resistance.
2, different components
High-speed steel is a composite steel with a carbon content generally ranging from 0.70 to 1.65%. The alloy element is large, with a total amount of 10-25%.
Tungsten carbide, cobalt carbide, nickel carbide, titanium carbide, and tantalum carbide are common ingredients of tungsten steel. The particle size of the carbide component (or phase) is usually between 0.2 and 10 microns, and the carbide particles are combined with the metal binder. Adhesives usually refer to metal cobalt (Co), but for some special purposes nickel (Ni), iron (Fe) or other metals and alloys may also be used.
3. Different manufacturing processes
tungsten steel is sintered, the powder is pressed into the steel billet, heated to a certain temperature (sintering temperature) in the sintering furnace, held for a period of time (holding time), and cooled to obtain the required tungsten steel material.
The heat treatment of high-speed steel is very complicated and must go through a series of processes such as quenching and tempering.Usually manufactured in electric furnaces, high-speed steel is manufactured through powder metallurgy, and carbides in ultrafine particles are evenly distributed on the substrate, and their service life is improved.
