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. Â Â
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.Â
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Reference:Â Â
Production engineering by K.C. Jain and A.K. Chitale
Image courtesy: Google  Â
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