Designing and continuous extrusion forming of Al-Mg-Si contact lines for electric railway

作者：Popescu I N; Bratu V^*; Rosso M; Popescu C; Stoian E V

来源：Journal of Optoelectronics and Advanced Materials, 2013, 15(7-8): 712-717.

• The continuous extrusion forming
• Designing of extrusion die
• Al alloy contact line
• Electric railway

The experimental work aimed to obtaining the aluminum alloy contact lines for trams or light rail. For this purpose was elaborated AlMgSi0.5 Aluminum alloy was elaborated and semi-continuous casted into rods of phi 175 x 6000 mm, and then homogenized (520 degrees C / for 16 hours) for the continuous extrusion process. A chamber extrusion die was designed and executed. After continuous extrusion forming, the obtained contact wire has been heat treated (quenching and artificial aging at 155 degrees C for 14 hours, air cooling). The product was microstructurally analyzed and mechanically tested (Tensile strength, R-m, Elongation, A, Brinell Hardness, HB and tensile forces in the contact wire, F. Results have shown that, although the minimum tensile strength is less than 200 MPa (R-m = 163-248 MPa), the value of total tensile forces F = 4250-6450 kilogram-force (kgf) in AlMgSi0.5 contact wire is superior to the copper wire, (F=3500Kgf according with PN-64/E-90090 standardization and Romanian standard STAS 686-71).

• 出版日期2013-8