Material industry Development of cutting tool materials With the replacement of carbon tool steel by high- speed steel and cemented carbide,cutting speeds has been increased by many times. The requirement to machine steel at high speed have led to the development of the most advanced tool materials (such as ceramic and ultra-hard tool materials) Development of cutting tool materials With the replacement of carbon tool steel by high￾speed steel and cemented carbide , cutting speeds has been increased by many times. The requirement to machine steel at high speed have led to the development of the most advanced tool materials (such as ceramic and ultra-hard tool materials). Material industry