Patent ID: 7871453
Filing Date: 2011-01-18
Classification: B22F

Abstract:
1. A powder composition free from lubricant(s) which is (are) solid at ambient temperature containing a coarse iron or iron-based powder having an average particle size between 75 and 300 μm wherein less than 10% of the powder particles have a size below 45 μm and the amount of particles above 212 μm is above 20%, and as a lubricant at least one non drying oil or a vegetable or animal based fatty acid having a crystalline melting point below 25° C., and a viscosity (η) at 40° C. above 15 mPas, wherein said viscosity is temperature dependent according to the following formula: wherein k is the slope, T is the temperature in degrees Kelvin, and C is a constant, in an amount between 0.04 and 0.4% by weight of the composition and optional additives.