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What Is The Difference Between High-speed Steel Drill Bits And Tungsten Steel Drill Bits?
- Jan 09, 2018 -

High-speed steel High-speed steel drill material is a complex alloy steel, containing tungsten, molybdenum, chromium, vanadium, cobalt and other carbide forming elements. The total amount of alloying elements of about 10 to 25%. It is high-speed cutting in the case of high heat (about 500 ℃) still maintain high hardness, HRC can be more than 60. This is the most important feature of HSS - red hardness. The carbon tool steel after quenching and tempering at room temperature despite the high hardness, but when the temperature is higher than 200 ℃, the hardness dropped sharply at 500 ℃ hardness has dropped to a similar degree with the annealing state , Completely lost the ability to cut metal, which limits the production of carbon tool steel cutting tools used. The high-speed steel due to the red hard, make up the fatal shortcomings of carbon tool steel.