Abstract
The shearing energy of the impact shearing of rolled Pb-brass was measured by simple testing equipment, and the shape of sheared section was examined. The shearing work and sheared section changes according to the Pb percentage and reduction of plate just as in the case of the static test, but the effect of Pb to the shearing work in this case is slightly larger compared with in latter case. On supported shearing, the highly reduced plate containing Pb more than about 1% requires much energy for banishing. When shearing cracks from edges of die and punch are not easily connected, secondary cracks along the rolled layer grow and complete the shearing. Secondary cracks are apt to grow under the following conditions : 1) more than 1% Pb, 2) high reduction, 3) large clearance, 4) shearing plane in accordance with the direction of rolling.
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