Basic mechanical properties of layered steels

Abstract

This article deals with identifying attributes of layered steel materials (damask steel) with the help of mechanical tests. Experimentally verify basic mechanical properties of layered steel and subsequently assessed it in comparison with the values obtained for the classic steel materials. In conclusion, there are listed the possibilities of using multilayer steel materials in technical practice, depending on the economics of production. The damask steel was prepared by forge welding from a packet consisting of 17 layers (9 layers of tool steel 19 133 (CSN) with the thickness of 6 mm and 8 layers 80NiCr11 steel in the form of saw bands with the thickness of 1.2 mm. The packet was cut into 8 parts, folded 3 times and forged together, which provided damask steel with 136 layers. The resulting steel bars were used to make semi-fi nished products with the approximate dimensions of the test specimens. For evaluation of mechanical properties were applied the following tests: Tensile test, Charpy impact test, hardness and microhardness measurements The results of tests proved that the properties of damask steel are dependent not only on the direction led impact quality forge weld layers and content iof nhomogeneities in the place of discord, but also on the quenching and tempering temperature, resp. on the choice of quenching bath, which determine the fi nal structure of steel and the resulting hardness, respectively microhardness.