►The drill bit types and characteristics

1) Species

1.1 high-speed steel drill bit (ordinary drill)

The main system uses high-speed steel W, Mo-based material

1.2, (alloy drill)

Tungsten titanium-based (YG), tungsten, titanium cobalt (YT) material.

Physical and mechanical properties of high-speed steel

and carbide materials

2) Features

Carbide drill characteristics: high hardness, fast thermal conductivity , good toughness, good elasticity,

Carbide drill drawbacks: poor impact strength, abrasion resistance is poor.

The high-speed steel twist drill and carbide drill bit of the advantages and disadvantages are opposite.

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