Influence of aging parameters on the properties of AlSi1MgMn

U radu se istražuje utjecaj parametara starenja na tvrdoću aluminijeve legure 6082. U teorijskom dijelu obuhvaćena su općenito svojstva tehničkog aluminija, njegovo legiranje, podjela precipitacijski očvrstljivih legura aluminija, dijagrami stanja aluminijevih legura te metode karakterizacije aluminijevih legura: ispitivanje tvrdoće, EDS/EDX analiza, SEM analiza i svjetlosna mikroskopija. U eksperimentalnom dijelu provedeno je određivanje kemijskog sastava uzoraka aluminijeve legure 6082, mjerenje dimenzija i ispitivanje tvrdoće uzorka nakon homogenizacijskog žarenja i umjetnog starenja. Umjetno starenje provedeno je prema planu pokusa u kojem je kombinirano vrijeme starenja 5 h i 10 h s temperaturom 155 C, 165 C i 175 C. na temelju ispitanih tvrdoća predložen je matematički model za predviđanje tvrdoće aluminijeve legure 6082 u ovisnosti o temperaturi i vremenu starenja.The paper investigates the influence of aging parameters on the hardness of aluminum alloy 6082. The theoretical part covers the general properties of technical aluminum, its alloying, the division of precipitation-hardenable aluminum alloys, state diagrams of aluminum alloys and methods of characterization of aluminum alloys: hardness testing, EDS/EDX analysis, SEM analysis and light microscopy. In the experimental part, the determination of the chemical composition of samples of aluminum alloy 6082, measurement of dimensions and testing of sample hardness after homogenization annealing and artificial aging were carried out. Artificial aging was carried out according to the experimental plan in which aging time of 5 h and 10 h was combined with temperatures of 155 °C, 165 °C and 175 °C, based on the tested hardnesses, a mathematical model was proposed for predicting the hardness of aluminum alloy 6082 depending on temperature and aging time.. Key words: Technical aluminum, alloying, precipitation hardening, solution annealing, aging