鋼の高温加工強度に關する研究 (I) : 高温高速度引張り試験装置

概要

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In order to obtain the value of deforming strength of steels at high speed-high temperatures corresponding to such hot-working processes as hot-rolling, forging, extrusion etc., the author specially manufactured a tension-testing machine. Main parts of this machine were as follows : (1) Deformation speed of specimens at gage length conld be converted into 77/sec, 7/sec & 0.8/sec respectively. (2) As for the direct resistance heating of specimens using direct current, rapid heating was possible within the range of 700°∿1400℃. Actual measurements were done standardized by 800°, 1000°°& 1200℃. (3) Tension stresss was measured by the use of a capacity-change pick-up and elongation was measured using inductance change. Recording was made by the use of an electromagnetic oscillograph (H-Vibrator). Using this tension-testing machine, both nominal stress-strain curve and true stress natural strain curve in all deforming conditions of all types of steels were to be obtained, the latter being data of deforming the strength. In this article, the design and construction of this testing machine, together with a suitable experimental technique were described in details.
社団法人日本鉄鋼協会の論文
1955-05-01