ALUMINUM FREE-CUTTING ALLOY, PROCESSES FOR THE PRODUCTION THEREO F AND USE THEREOF

摘要

The present invention relates to an aluminum free-cutting alloy without lead as an alloy element, containing: a) as alloy elements: 0.5 to 1.0 wt. % Mn, 0.4 to 1.8 wt. % Mg, 3.3 to 4.6 wt. % Cu, 0.4 to 1.9 wt. % Sn, 0 to 0.1 wt. % Cr, 0 to 0.2 wt. % Ti, b) as impurities: up to 0.8 wt. % Si, up to 0.7 wt. % Fe, up to 0.8 wt. % Zn, up to 0.1 wt. % Pb, up to 0.1 wt. % Bi, up to 0.3 wt. % of the remaining ones, c) the remainder up to 100 wt. % aluminum, further to processes for the production thereof and to use thereof. The alloy exhibits superior strength properties, superior workability, superior free-cutting machinability, corrosion resistance, lesser energy consumption and is environmentally friendly in production and use.