PURE IRON POWDER FOR POWDER METALLURGY PRODUCED BY WATER ATOMIZATION AND ITS PRODUCTION

摘要

PURPOSE: To improve the strength of the sintered part by working the Fe having specified contents of Si, Mn and oxygen into the pure iron powder for powder metallurgy by water atomization. ;CONSTITUTION: The Fe contg. by weight, 0.08% Si, 0.01-0.3% Mn, ≤0.15% oxygen and the balance essentially Fe is water-atomized to produce a pure iron powder for powder metallurgy. The powder is dried in a nitrogen atmosphere contg. ≤7.5vol.% oxygen and then reduced in a reducing gas atmosphere. When Cu and graphite are added to the powder and the mixture is sintered, the strength is improved, and high-strength sintered parts are easily designed and produced.;COPYRIGHT: (C)1994,JPO&Japio