14.5.2001 Pressing & Sintering

Investigating the Relationsship Between Machinability Additives and Machining Parameters

PM² TEC 2001, in New Orleans, USA. Authors: Sigurd Berg, Owe Mårs. The choice of machinability enhancing additive depends on the machining conditions such as operations used, tool used, material machined and some others. This presentation describes the large variation in tool life when testing additives under different conditions. MnS ans MnX have been tested as additives in PM materials ranging from soft pure Iron to the complex structure of Distaloy AE containing ferrite, perlite, bainite and martensite. The effect of the additives has been compared in drilling and turning applications as well as using different tool materials and coatings.