Coworkers of researching program together with the investor of the research Acroni d.o.o. and foreign institutions of knowledge have been designing and developing a high quality of new generation of HSLA steel PROTAC 500 in the form of plate for the armour prevention. PROTAC 500 is a lowcarbon (0,27 m. %) steel with conditional weldability. The steel is alloyed with Si (1.01 m. %), Cr (0,69 m. %), Mo (0,33 m. %) and microalloyed with Ti (0.027 m. %) for the crystal grain size control as well as with B (0,002 m. %) for better hardenability. Ms temperature of PROTAC 500 steel is relatively high which allows self tempering. The PROTAC 500 steel exhibit the following mechanical properties: hardness from 480 to 535 HB, Proof strength Rp0.2 from 1150 to 1250 N mm2, tensile strength Rm from 1500 to 1700 N mm2, Rp0.2/Rm ratio from 0,56 to 0,75, elongation A5 min. 9 %, Charpy impact toughness ( T = 40 °C, V notch) min. 20 J. Official ballistic testing and the Certificates giving ceremony of the ballistic testing has been carried out in NATO accredited Beschussamt Institute in Ulm. After ballistic testing of PROTAC 500 steel the Acroni d.o.o. company has been awarded with 5 certificates from the level 5 to level 11 according to European standard VPAM APR 2006 as well as with 5 certificates i.e. three for the level 1, one for level 2 and one for level 3 according to NATO AEP55 STANAG 4569 standard.
F.06 Development of a new product
COBISS.SI-ID: 1571167Today almost all manufacturers of dental materials in their certificates of material quality describe material chemical composition, mechanical properties, process ability and aesthetic characteristics, while information about thermal properties are not available. Within the interdisciplinary and international teamwork, thermal properties of five selected dental materials were measured, by modern transient plane source method in accordance with standard ISO 22007-2. Thermal properties were measured at temperature interval between 7 °C and 45 °C.
F.14 Improvements to existing production methods and tools or processes
COBISS.SI-ID: 1762655Subject 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.32 International patent
COBISS.SI-ID: 1505631The context of the thesis is the processing of MANNLICHER - CARCANO mod. 91 and MANNLICHER M 1895 rifles, carried out at the conservation - restoration workshop of the Museum of Contemporary History of Slovenia. Analysis of steel barrel and lock, and analysis of damage and errors were made in the laboratories of the Department of Materials and Metallurgy, Faculty of Natural Sciences and Engineering, University of Ljubljana and laboratories of authorized institutions. Due to different levels of conservation of the rifles discussed they were treated by different methods. Italian Mannlicher - Carcano rifle mod. 91 was in extremely poor condition: the metal part was completely corroded, the wooden parts quite porous and weathered, with no shoulder strap, etc. After documenting and separation of the individual materials the metal parts were treated with different procedures using scalpels, rotary brushes, ultrasonic, chemicals, etc. Wooden parts of rifle were poisoned, deeply impregnated, holes filled, leveled and toned.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 1539167This 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.10 Improvements to an existing technological process or technology
COBISS.SI-ID: 1454687