發條用燐青銅の研究

Abstract

An investigation has been made of the influences of added metals, such as Al, Si, Fe, Mn, Zn, etc. on the properties of Phosphor bronze. The tests have shown that the mechanical properties of Phosphor bronzes containing small amounts of Al and Si (about 0.5% each) are distinctly higher in strength than that of Plain Phosphor bronze, and that the addition of few percent of Fe or Mn gives still more excellent hot-working characteristics. The following table shows the results of tests made on some ordinary and modified Phosphor bronzes._??_ The tensile and elastic properties of Phosphor bronze strip in direction parallel, normal, and at 45° to the rolling also have been determined after progressively increasing rolling reduction up to 70%. When the rolling reduction has been sufficient (about 30%) to induce a directional effect, the greatest tensile properties are obtained normal to the rolling direction, but bending properties are least.