Abstract
This report relates to magnetic properties of sintered iron containing phosphorus. The effects, on sintered iron compacts, of forming pressure, the amount of hydrogen loss of iron powders, sintering temperature and times were investigated.
The iron powders used are made by reduction of iron ore. The amount of adding phosphorus, forming pressure, amount of hydrogen loss of iron powders are 0-2.5 (wt)%, 2-8 T/ cm2, 0.4-1.6 (wt)%, respectively.
Magnetic properties are improved by adding phosphorus, and the optimum ratio of it was 0.8-1.0 (wt)%b and are superior when sintered at 1, 300°C in hydrogen for 3hr. Maximum permeability and magnetic induction B 25, both increase with the sintered density, but maximum permeability of sintered iron containing much phosphorus tend to decrease. The quantities of phosphorus that produce maximum sintered density and maximum permeability are different for each forming pressure and the amout of hydrogen loss of used iron powder.
