STUDY OF THE METHOD OF MANUFACTURING PIANO WIRE.
Yorio Toraiwa · 鐵と鋼 : 日本鐡鋼協會々誌 · 1943
The author has experimentally manufactured various kinds of piano wire since Showa 15 (1940) from the necessity of the domestic manufacture of piano wire. In the present report, some properties of different kinds of domestic wire were compared with the imported products. It was confirmed that the quality as good as the imported products are now available in the wholly domestic wire, although more efforts are expected for the manufacture of better qualities. Above all, he mentioned of the brittleness appearing in the low-temperature heating and laid stress on its preventive methods. As the fundamental data, the result of the test on the effect of drawing speed, was described with special reference to the prospect of the X-ray study necessary therefor.