The objects of this report are to examine the mechanical properties of Fe-Cu-B based sintered alloys containing some other elements such as carbon or some kinds of carbides, and to examine the cold-formability of Fe-Cu-B base sintered compacts and the mechanical properties of cold-forged compacts.
After carburizing, quenching and tempering, the sintered compacts composed of F-e-5Cu-0.15B-0.65Cr-0.1C show a tensile strength of 900 MPa at the density of 7.2g/cm³.
As these sintered compacts show high elongation, it is possible to make parts by cold-forging using these materials.
After carburizing, quenching and tempering, the tensile strength of cold-forged compacts composed of the above mentioned material is more than 1200 MPa.