English to Russian Tech/Engineering Engineering: Industrial

The quality of a sheared edge depends, on the settings of the scissors and the quality of the steel cutter. A sheared edge with a poor quality may provide very low fatigue resistance. In order to achieve better fatigue resistance, the edge must be given a post-treatment in order to eliminate crack-like imperfections. Machining removes such defects and provides good fatigue resistance see the curve for milled edges in figure 5.27. Another method is to introduce compressive residual stress by shot blasting. A slitted edge usually gives higher quality than a sheared one but the dependence on tool settings is substantial. Edge corning rolling of slitted material has substantial effect on the fatigue strength.

Здесь рассматриваются различные типы кромок стального листа - milled, laser-cut, sheared и, в данном случае, slitted.