SETT ATT GENOM PULVERPRESSNING KONTINUERLIGT FRAMSTELLA EN BANDFORMIG STALPULVERPRESSKROPP

摘要

The invention relates to the continuous production of steel compacts in strip form from as-atomized stainless steel powder. A porous green compact of stainless steel powder having a carbon content not exceeding 0.06% by weight is through-carburized to raise its carbon content to a level in excess of that required in the product and then subsequently heat treated in a reducing atmosphere to promote chemical reaction between the carbon and oxygen present in the compact to reduce the former to a level not exceeding 0.03% by weight and the latter by a factor of two. Through-carburizing and reduction may be effected in successive zones 2,3 of a continuous floatation furnace 1.