Chapter 22, Problem 1RQ

What are the major properties required of cutting-tool materials? Why?

To determine

What are the major properties required of cutting-tool materials? Why?

Explanation of Solution

A cutting-tool material should have the below attributes:-

Hot hardness

Wear resistance coupled with hardness and strength of the tool stay intact at the temperatures experienced in machining operations. This property is responsible for making sure that the tool would not go through any plastic deformation. That is how it retains its sharpness and forms both.

Toughness and strength of impact

In interfered cutting tasks or forces like milling, and then turning a splined shaft on a lathe, the forces of impact on the tools is experienced time and again. This is because of vibration and chatter amid machining. But this neither chip nor break the tool.

Thermal shock resistance

To bear the fast temperature cycling, as experienced in interfered cutting.

Wear resistance

With the goal that a long-enough tool life is acquired before substituting becomes inevitable.

Chemical stability and inactiveness

Concerning the workpiece material, to evade or limit any unfavorable reactions, adhesion, and tool–chip diffusion which may fasten the wear of the tool.