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Lasers and electron beams can be used as sources of intense heat at the surface for heat treatment , remelting glazing , and compositional modification. The patent was contested and eventually nullified. M2, M48 and intermediate types are Txx. The main use of high-speed steels continues to be in the manufacture of various cutting tools: drills, taps , milling cutters , tool bits , gear cutters Hobbing , saw blades, planer and jointer blades, router bits, etc. Unsourced material may be challenged and removed. Combining molybdenum, tungsten and chromium steel creates several alloys commonly called "HSS", measuring Rockwell "C" hardness. The major advantage of this steel was that it hardened when air cooled from a temperature at which most steels had to be quenched for hardening.

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