Hoganas Ab

Hoganas Ab Fack

Lars-Erik Svensson

Jan R Tengzelius

Carl-Axel Blande

Ove Thornblad

Inhomogeneous sintered body

Chromium-containing iron or steel powder containing about 0.2-15 percent by weight of chromium, the rest being iron. The powder is characterized thereby that the chromium is present in the form of a powder-formed Fe-Cr-alloy in .alpha.-phase containing about 40-50 percent by weight of chromium and having a particle size essentially less than about 50 .mu.m; a process for manufacturing the powder and pressed and sintered products manufactured in a powder-metallurgical manner starting from the said powder.

Iron or steel powder, a process for its manufacture and press-sintered

New phosphorus-containing steel powders for use in the manufacture of sintered components of high toughness are described which comprise steel powder substantially free of phosphorus and having good compressibility, and in intimate admixture therewith, a ferrophosphorus powder having a phosphorus content of at least about 2.8% by weight and preferably about 12 to 17%, in proportions to provide a phosphorus content in the final powder of from about 0.2 to 1.5% by weight, the ferrophosphorus powder containing at least about 0.3% carbon and preferably about 0.5 to 2.5% and having a maximum particle size of about 10 to 20 .mu.m.

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Hoganas, Sweden

Lars-Erik Svensson