Fe powder for sintering

Abstract

Abstract PURPOSE:To manufacture ferrous sintered body having excellent strength without any Cu segregation in the sintered body by using iron powder having Cu layer on the surface as the powder for manufacturing sintered body. CONSTITUTION:Cu is added in the Fe at about 4wt.% and after melting, it is pulverized with water-atomized method, etc.. and the iron powder 1, in which 1.5wt.% Cu is entered into solid solution and about 2.5wt.% Cu is formed in the layer 12 on the surface, is obtd. This iron powder is annealed in the reducing furnace to manufacture the iron powder as raw material for powder metallurgy. This iron powder is compressed and compacted and by sintering at e.g., 1100 deg.C the Cu layer on the surface of the iron powder 1 becomes liquid phase, because the melting point thereof is 1083 deg.C, and it fills up gap of the iron particles and by alloying on the Fe surface mutually sticking between iron particles is strengthened to obtain the ferrous sintered body having excellent strength.

Inventors

• 👤 Hirofumi Sugawara
• 👤 宏文 菅原
• 👤 Yoshihiro Igai
• 👤 猪飼　善弘
• 👤 Isao Sakamoto
• 👤 阪本　績
• 👤 Takehiko Hayami
• 👤 早見　威彦

Bibliographic Details