Let’s talk about hss.
What is hss?
hardening means hardening, and very Sharp. Also known as white steel.
High speed steel is a composite alloy steel containing carbide forming elements such as tungsten, molybdenum, chromium, vanadium and cobalt. The total amount of
alloying elements is about 10-25%. It maintains high hardness at high heat cutting (about 500 ° C) and HRC can be higher than 60. This is the most important characteristic
of high speed steel - red hardness. However, after quenching and low temperature tempering, the carbon tool steel has a high hardness at room temperature, but when the
temperature is higher than 200 ° C, the hardness sharply drops, and the hardness at 500 ° C drops to an annealing state. The ability to cut metal is completely lost, which
limits the use of carbon tool steel in cutting tools. 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, drill bits, hobs, machine saw blades and high-speed demanding dies.
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Susan F.//SMC Editor