鍛延鋼の性質に就て

概要

論文の詳細を見る
The effect of forging ratio on the mechanical properties of forged steels was examined on a carbon steel and two alloy steels both in annealed and heat-treated conditions. In the result we see that the tensile strength and the elastic limit show a slight decrease with the increase of forging ratio in the case of carbon steel and Ni-Cr steel, while in high Cr steel they are, on the contrary, increased as the forging ratio rises. Brinell's hardness also shows the same tendency as the tensile strength. The elongation and the contraction of area are markedly increased at the first step of reduction and attain their stational values at the forging ratio 1/4. The impact resistance and the number of repeated impact are found to reach their stational values at the forging ratio higher than 1/8. It has been considered that the forging effect in a steel billet is greater at its center than the surface ; in the present investigation we confirmed the fact experimentally, and further made some mechanical tests to show the gradual change of the mechanical properties, from surface to center, in a forged billet
社団法人日本鉄鋼協会の論文
1931-06-25