Factors combine to affect the choice of tool

These factors combine to affect the choice of tool geometry and grade. Therefore, the workpiece materials considered in this knowledge system fall into the following seven categories:

a) Steel: It refers to a large class of iron-containing alloys containing a small amount of carbon and other alloying elements. The workability of steel is usually good, but it varies depending on the hardness, carbon content, etc. of the material.

b) Stainless steel: It is a steel alloy with at least 12% chromium content, with non-magnetic properties. Stainless steel has excellent corrosion resistance and can be used at different levels.

c) Cast iron: A group of iron-carbon alloys containing more than 2% carbon. Gray cast iron, malleable cast iron, and spheroidal graphite cast iron are easy to process, while white cast iron, compacted cast iron, and austenitic cast iron are relatively difficult to machine.

d) Non-ferrous materials: Soft metals such as aluminum, copper, brass, etc. The workability of these materials usually fluctuates with the alloying elements.

e) Special Alloy: It consists of a large number of iron, nickel, cobalt and titanium-based alloy materials. Special alloys are very similar to stainless steel but are more difficult to cut, reducing the life of the end mill.