PROTAC 500, an armoured plate for the pose of NATO, represents a world-class product, made of new generation of steel. Its primary purpose is to protect the lives and property of both natural and legal persons or entities. It has excellent mechanical properties, including standard technological characteristics, such as good tensile properties, excellent impact strength at low temperatures, hardness and deflection as well as ballistic testing, where the PROTAC 500 armoured plate is made sccording to NATO standards as it has lower required thickness of protection in comparison to the competition. The reduction of required thickness affects the mass and is of great importance especially for vechicles with an integrated PROTAC 500 plate, as accordingly, it ha san important energetic and environmental aspect. The PROTAC 500 armoured plateh as a good flexibility for bending and may be welded. While developing the steel, only the advanced technology of self-tempered martensite was used, which makes it possible to manufacture the PROTAC 500 armoured plate with a single treatment.
F.06 Development of a new product
COBISS.SI-ID: 1510751Subject of the invention is a chemical composition of an alloy for electrical contacts and the method for its synthesis. Electrical contacts made from this alloy, according to the invention, are preferentially made for the low-voltage systems or electrical contact assemblies (starters, alternators). The copper-based high performance alloy for electrical contacts and the method for its manufacture is ecologically safe and includes the processes of continuous casting, crystallization, homogenization, quenching, and subsequent precipitation annealing in a protective atmosphere of inert gas (argon). The alloy of the invention has less than 0.01% by weight of the impurities and the amount of chemical elements by weight: 0.4-0.8% Ni; 0.2-0.4% Fe; 0.1-0.3% P; the rest copper, reach hardness of ) 140 HV and has a specific electric conductivity of )73% IACS.
F.33 Slovenian patent
COBISS.SI-ID: 1505631This work deals with the characterization of a polymer-matrix composite support beam designed for the automotive industry. The discussed composite polymer-matrix material was characterized using light microscopy (LM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Vickers hardness (HV) measurements and mechanical testing under tensile loads. Using these characterization methods the diameter, distribution and arrangement of the fibres in the composite material were determined. The type of fibres used in this composite material was also established from the chemical composition determined by EDS. The mechanical properties of the discussed composite material under a tensile load were determined on proportional, sub-sized, tensile specimens prepared from the support beam.
F.07 Improvements to an existing product
COBISS.SI-ID: 1454687The most used and established method for detecting the effects of the product on the environment is a method of life cycle assessment (LCA), which analyzes the effects of the product on the environment in all its life stages (design, materials selection, manufacture, use, and ultimately its removal), and is an important tool when we deciding on choosing and optimizing the technology and raw materials. In the work a short review of the World and Slovenian steel production, and the state in the biggest steel producer (steelwork) in Slovenia is presented. In the frame of our study is discussed life cycle assessment (LCA) method in the engineering praxis the most used and established method for detecting the effects of the product on the environment. We analyzed potential application of LCA for the Slovenian steel producers, especially the case of ACRONI, the biggest steel producer in Slovenia. Heavy plates of two typical steel grades from ACRONI production program were analysed during the pilot project.
F.13 Development of new production methods and tools or processes
COBISS.SI-ID: 1463135In this paper the results of microstructure analysis before and after fracture along with mechanical properties and hardness of the CuAlNiMn shape memory alloy was presented. Melting of the alloys was carried out in vacuum induction furnace in protective atmosphere of argon. Alloy was casted into ingot of 15 kg weight. After casting the alloy was forged and rolled into a diameter of approximately 10 mm. Microstructural characterization was performed by optical microscopy (OM) and scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS). Martensitic microstructure of CuAlNiMn alloy before tensile test was observed. A tensile test and hardness measurements were carried out. The fractographic analysis showed some areas with intergranular and mainly transgranular brittle fracture. Tensile test results showed that tensile strength was 401.39 MPa and elongation was 1.64%. The hardness of the CuAlNiMn alloy was 290.7 HV 0.5.
F.07 Improvements to an existing product
COBISS.SI-ID: 1483871