抄録
Low carbon ferrochrome ingot contaning about 45% Cr was reduced to powder by means of σ phase brittleness brought about as a result of heat treatment at about 800°C.
Whether the application for powder metallurgy of the ferrochrome powder was proper or not was examined.
1) Powder ferrochrome crushed by means of σ phase brittleness is dense and square shaped with property to be easily made fine powder.
2) Green strength of compact, while it is reduced in proportion to increase of ferrochrome powders content, shows a certain degree of intensity that makes possible of using them, even in case of containing 25% of chrome in the event of compact pressure at 5ton/cm2.
3) In case of containing 13%, 18%, and 25% of chrome, compacts at 3 to 5ton/cm2 of compacting pressure are sufficiently diffused by sintering at 1300°C for about 3 hours.
4) Tensile strength of compacts in case of 3) shows 27-28kg/mm2, and 28-30kg/mm2 where was heat treated.
