Abstract
Tensile strength, impact value, ductility, hardness distributions and strain distributions for the joined products by means of infiltration method are investigated. The mechanism of the joining is also studied. The result obtained are as follows:
(1) In the case of impact value and ductility, the joined compacts are a little inferior to the conventional compacts infiltrated in usual way. But the tensile strength is as good as that of the conventional ones.
(2) The joined compacts possess a uniform hardness distribution, therefore the deformation patterns in the products obtained by the compression with grooved dies is similar to that in the conventional infiltrated compacts.
(3) Strengthening of the joined compacts can be established by the following process; first the iron skeletons are joined between their contact faces and subsequently the infiltration occurs. So that, in order to increase the strength of joined prooducts, the two conditions must be satisfied in the manufacturing process; these are possible by the so-called low-speed heating and short-time infiltration.
