Masao Kuroda, Isao Gokyu and Kakunosuke Yamamori
In order to explain the experimental results reported in the 1st report, the flow of material was investigated by the plug-method, hardness distribution in the cross section of rolled wire was measured by a micro-vickers hardness tester, and the elastic stress distribution in the round and the flat materials under compression was obtained by the photoelastic method. The results were as follows: (1) The maximum shearing stress took the greatest value at the regions near the contact surfaces with rolls in a round material, but in a flat material at the center of the cross section. From a maximum shearing stress line, the direction of material flow was deduced. (2) The flow of material obtained experimentally agreed with that deduced from the photo-elastic method. (3) The maximum hardness occured at the center of the cross section by medium reduction but the higher the reduction the distribution of hardness became more the homogeneous.
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