The outer layer is tin to provide low interface

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • • • Made from 70% Al2O3 and 30% titanium carbide. CERamics of non-metallic compounds of carbides or carbonitrides with METallic binder TiC, TiN, TiCN , essentially titanium-based These are tougher and more fracture resistant than ceramics but somewhat softer. For machining most steels, stainless steels, and non-ferrous materials Available with integral chip breakers High abrasion resistance More chemical stability Less tendency for adhesion so less BUE Good surface finish while machining steel Major Classes of Tool Materials 6. Ceramic Tools 6. Ceramic tool materials are made from sintered aluminum oxide (Al2O3) and various other boron and silicon nitride powders; these are mixed and sintered at about 1700 C. Extremely brittle; to be used where vibrations do not occur. Three types: Aluminum oxide (Al2O3) Sialon (a combination of silica, aluminum, oxygen, and nitrogen) Silicon nitride (Si3N4) Silicon nitride ceramic grade insert for the highspeed machining of cast irons (Sandvik Coromant) Major Classes of Tool Materials Major Whisker Reinforced Ceramics Whisker Al2O3 matrix reinforced by tiny silicon carbide whiskers. These whiskers distribute the cutting forces more evenly, which results in a considerable increase in fracture...
View Full Document

This note was uploaded on 02/04/2014 for the course ME 3162 taught by Professor Nus during the Spring '13 term at National University of Singapore.

Ask a homework question - tutors are online