Abstract
Titanium ore is iron sand abundantly produced on the sea-coast of Japan, and refining process of iron sand to sponge titanium and consolidation process of titanium are being successfully carried out on the industrial scale in Japan. A brief description of them was published in the previous issue.In this paper, described are the processing of titanium and titanium alloys both in Japan and the United States of America, metallographical properties of titanium and various characteristics of them as a structural material.Discussions contained in the main text are as summarized below.XI Physical properties of titanium.XII Chemical compositions of unalloyed and alloyed titaniums and their mechanical properties.XIII Metallographical properties of titanium.(1) Phase diagrams(2) Comparison with Fe-C alloy and martensitic transformation(3) Structures of titanium alloys and their characteristics(4) Heat treatment of titanium alloysa. Heat treatment of 2Al-2Fe-titanium alloyb. Heat treatment of 5V-titanium alloyc. Discussion on the heat treatment of titanium alloys and on a new titauium alloy-6Al-4V-titanium alloyXIV Processing of titanium and titanium alloys(1) Forging of titanium and titanium alloys(2) Rolling(3) Extrusion(4) Tubing and wire drawing(5) MachiningXV Weldability, corrosion resistance, descaling and conversion curves for hardness and strengthXVI Conclusions (XIV, XV and XVI is to be printed in the next issue)
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