We have seen the basics of metal cutting tools i.e.metal cutting tool definition and classification, single point cutting tool nomenclature. Also, we have studied the difference between rake angle and clearance angle of cutting tool with the help of our previous posts.   

Today we are going to start a very important topic here with the help of this post i.e. main characteristics of cutting tool materials.

We will see here that what are the various important characteristics of metal cutting tool materials.

Main characteristics of cutting tool materials

According to the analysis of tool failure, there are following important characteristics of cutting tool material as mentioned below.

Sufficient strength

Metal cutting tool material must have sufficient strength to maintain a sharp cutting edge.

Resistance to wear

Metal cutting tool material must have sufficient resistance to withstand wear of cutting edge of metal cutting tool and metal cutting tool may provide better service life before the replacement of metal cutting tool.

Sufficient hardness

Metal cutting tool material must have sufficient hardness especially at elevated temperatures so that strength and hardness of cutting tool material may maintained at the temperature encountered in the machining operation.

Sufficient toughness

Metal cutting tool material must have sufficient toughness so that impact forces on the cutting tool in interrupted cutting operations e.g. milling or turning may not fracture the cutting tool.

Chemical stability

Metal cutting tool material must have sufficient chemical stability so that any adverse reactions that may contribute to tool wear could be avoided or reduced.

Proper heat treatment

Metal cutting tool material must be well heat treated to secure good mechanical and technological properties.

Accurate design

Metal cutting tool material must be precisely designed to meet basic requirements.

Therefore, we have seen here the various important characteristics of metal cutting tools. 

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We will find out now the concept of in our next post.   

Reference:  

Production engineering by K.C. Jain and A.K. Chitale

Image courtesy: Google     

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