What's the difference between an alloy bit and a HSS bit?

1. Different materials

Alloy is a kind of ultra-high hardness and very wear-resistant material, the only disadvantage is easy to break, but the wear resistance is very strong, good alloy material is very easy to use, and the price is very high.

HSS drill a is not easy to break and wear resistance is very good and so on, generally for factory in need of high speed steel Drill Bit is more cost-effective, because the unit price is low and the quality also, still can be generally adopts high speed steel drill bit, unless encounter and rigid material, high speed steel drill bit processing, select alloy bit again.

2. Different physical properties

Alloy bit generally refers to carbide bit, can be divided into integral, welding, indexable blade type and removable head type. The main components of the alloy are tungsten carbide, cobalt and so on. The hardness is relatively high, generally above HRC90 degrees. It is suitable for processing steel parts after heat treatment and difficult to process materials. Alloy drill itself high hardness, heat treatment after the product hardness must be used alloy drill.

HSS bit material is a kind of alloy steel with complex composition, containing tungsten, molybdenum, chromium, vanadium, cobalt and other carbide forming elements. The total alloying element is about 10 ~ 25%. It can maintain high hardness under the condition of high heat generated by high speed cutting, HRC can be more than 60.

HSS Drill Bits can maintain high hardness and HRC above 60 even when high heat is generated by high speed cutting. Carbide drill has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, even at 500℃ is basically unchanged, still has a high hardness at 1000℃.