Abstract

In forging shops, the ingot or bloom is sometimes forged either by first stamping sideways and then upsetting or by these procedures in reverse order. The object of this investigation is to find out some effects caused by the above mentioned processes upon the properties of the material, comparing with the known fact that the ordinal forging brings good effects to longitudinal test but injurious to transverse. In the present experiment, the material was subjected to the lengthening and upsetting operations and we found that the result of the material tests indicated the existence of the combined effect of the good and bad influences of the each operation. We found also that the last forging was more effective than the foregoing and therefore chiefly determined the final mechanical properties of the matorial.