Jfe Steel Corporation

Hyundai Motor Company

Kia Motors Corporation

Hirofumi Enokido

Hak Soo Kim

Akio Kobayashi

Naomichi Nakamura

Masashi Fujinaga

Hiroshi Sugihara

Akio Sonobe

Toshio Maetani

Kohsuke Ashizuka

Hisashi Sudo

The present disclosure relates to an iron-based prealloy powder having excellent strength and processability, and an iron-based alloy powder for powder metallurgy and a sinter-forged member using the same. The iron-based prealloy powder for powder metallurgy according to an embodiment of the present disclosure includes 0.5 to 5.0 wt % of Cu, 0.1 to 0.5 wt % of Mo, and a balance of Fe and other inevitable impurities. A Cu content (Cu %) and a Mo content (Mo %) satisfy the following Relational Equation (1):0.3&#xd7;Cu %+3&#xd7;Mo %&#x2264;2.7&#x2003;&#x2003;(1).

Iron-based prealloy powder, iron-based diffusion-bonded powder, and iron-based alloy powder for powder metallurgy using the same

An iron-ion supply material capable of efficiently supplying iron ions to plants is provided. An iron-ion supply material that acts as an iron-ion supply source for supplying iron ions contributing to plant growth comprises an iron powder having an iron content of 80% by mass or more, wherein 50% by mass or more of the whole iron powder has a particle size of 100 &#x3bc;m or more and 10 mm or less.

Iron-ion supply material

Growing community of inventors

Tokyo, Japan

Hirofumi Enokido