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The difference between high-speed steel drill bits and tungsten steel drill bits

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The difference between high-speed steel drill bits and tungsten steel drill bits

High-speed steel (HSS) is a tool steel with high hardness, high wear resistance and high heat resistance, also known as high-speed tool steel or high-speed steel, commonly known as white steel.

High-speed steel tools are tougher and easier to cut than ordinary tools. High-speed steel has better toughness, strength and heat resistance than carbon tool steel, and its cutting speed is higher than that of carbon tool steel (iron-carbon alloy). Many, hence the name high-speed steel; and cemented carbide has better performance than high-speed steel, and the cutting speed can be increased by 2-3 times.

Features

The red hardness of high-speed steel can reach 650 degrees.

High-speed steel has good strength and toughness. After sharpening, the cutting edge is sharp and the quality is stable. It is generally used to manufacture small, complex-shaped tools.

Cemented carbide

Tungsten steel drill bit material (hard alloy)

The main components of the drill bit material are tungsten carbide and cobalt, which account for 99% of all components, and 1% is other metals, so it is called tungsten steel (hard alloy). Tungsten steel is a sintered composite material composed of at least one 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 usually between 0.2-10 microns, and the carbide grains are bonded together using a metal binder. The bonding metal is generally iron group metals, and cobalt and nickel are commonly used. So there are tungsten-cobalt alloys, tungsten-nickel alloys and tungsten-titanium-cobalt alloys. Tungsten steel drill bit material sintering molding is to press the powder into a blank, then heat it into a sintering furnace to a certain temperature (sintering temperature), keep it for a certain time (holding time), and then cool it down to obtain the tungsten steel material with the required performance.

Features:

The red hardness of cemented carbide can reach 800-1000 degrees.

The cutting speed of cemented carbide is 4-7 times higher than that of high-speed steel. High cutting efficiency.

The disadvantages are low bending strength, poor impact toughness, high brittleness, low impact resistance and low vibration resistance.

Pub Time : 2021-12-22 16:15:39 >> News list
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