Effect of the Shape of Rolling Passes and the Temperature on the Corrosion Protection of the Mg/Al Bimetallic Bars

Materials

卷:14

Robert Kosturek¹  Marcin Wachowski¹  Sebastian Mróz²  Andrzej Stefanik²  Karina Jagielska-Wiaderek²  Piotr Szota² 

[1] Faculty of Mechanical Engineering, Military University of Technology, 00-908 Warsaw, Poland;

[2] Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, 42-201 Częstochowa, Poland;

关键词: Mg/Al bimetallic bars;    explosive welding;    groove rolling;    microstructure;    corrosion resistance;   

DOI  :  10.3390/ma14226926

来源: DOAJ

【 摘 要 】

The paper presents the results of experimental tests of the rolling process of Mg/Al bimetallic bars in two systems of classic passes (horizontal oval-circle-horizontal oval-circle variant I) and modified (multi-radial horizontal oval-multi-radial vertical oval-multi-radial horizontal oval-circle-variant II). The feedstock in the form of round bimetallic bars with a diameter of 22 mm and 30% of the outer aluminum layer was made through explosive welding. The bimetallic bars consisted of an AZ31 magnesium core and a 1050A aluminum outer layer. Bars with a diameter of 17 mm were obtained as a result of rolling in four passes. The rolling process in the passes was conducted at two temperatures of 300 and 400 °C. Based on the analysis of the test results, it was found that the use of modified passes and a lower rolling temperature (300 °C) ensures a more homogenous distribution of the plating layer around the circumference of the core and results in an even grain decreasing, which improves the corrosion resistance of bimetallic bars compared to rolling bars in a classic system of passes and at a higher temperature (400 °C).

【 授权许可】

Unknown