A preparation method of high-strength and high-conductivity chromium-zirconium-copper alloy for contact wire of high-speed railway power grid
A high-speed railway, zirconium-copper alloy technology, applied in the direction of rod/rod/wire/strip conductor, etc., can solve problems such as difficulty in meeting demanding performance requirements, weakening and hardening, and easy growth of texture, and achieve good industrial application prospects, The effect of prolonging the service life without reducing the conductivity
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[0035] Such as figure 1 Shown, a kind of preparation method of high-strength and high-conductivity chromium-zirconium-copper alloy of the present invention's contact wire of high-speed railway network comprises the following steps:
[0036] Step 1: Solution Treatment
[0037] Chromium-zirconium-copper alloy ingots are subjected to solid solution treatment in a box-type resistance heating wire heating furnace. Room temperature; the weight percent of the components in the chromium-zirconium-copper alloy is 0.25-0.65% of chromium, 0.08-0.2% of zirconium, and the rest is copper.
[0038] Step Two: Equiradial Angle Extrusion
[0039] The copper alloy after solid solution treatment is processed into Φ19.5×150mm bar, lubricated by graphite paper, and deformed by equal-diameter angular extrusion with a 10-ton hydraulic press. The extrusion process is shown in figure 2 As shown, the deformation speed is 30mm / min; the diameter of the extrusion channel is 20mm, the outer angle is 30°...
Embodiment 1
[0048] The original ingot of chromium-zirconium-copper alloy (composed of chromium 0.45%, zirconium 0.1%, and the rest are copper) is subjected to solid solution treatment in a box-type resistance furnace. In an atmospheric environment, the heating time is 60min. at 960°C for 2 hours, then air-cooled to room temperature; the copper alloy after solution treatment was processed into a Φ19.5×150mm bar, lubricated with graphite paper, and deformed by equal-diameter angular extrusion with a 10-ton hydraulic press. The speed is 30mm / min; the diameter of the extrusion channel is 20mm, the outer angle is 30°, and the inner angle is 90°. After each extrusion, the sample rotates 90° in the same direction and enters the next pass; the sample is processed at room temperature 3 passes of extrusion, cut off extrusion burrs and bar extrusion tailings; the chromium-zirconium copper alloy bar obtained in the previous step is subjected to aging treatment at 460°C for 4 hours in a box-type resist...
Embodiment 2
[0051] The original ingot of chromium-zirconium-copper alloy (composed of chromium 0.25%, zirconium 0.2%, and the rest is copper) is subjected to solid solution treatment in a box-type resistance furnace. temperature at 800°C, heat preservation for 3 hours, and then air-cooled to room temperature; the copper alloy after solid solution treatment was processed into a Φ19.5×150mm bar, lubricated with graphite paper, and deformed by equal-diameter angular extrusion with a 10-ton hydraulic press. The speed is 30mm / min; the diameter of the extrusion channel is 20mm, the outer angle is 30°, and the inner angle is 90°. After each extrusion, the sample rotates 90° in the same direction and enters the next pass; the sample is processed at room temperature 3 passes of extrusion, cut off extrusion burrs and bar extrusion tailings; the chromium-zirconium copper alloy bar obtained in the previous step is subjected to aging treatment at 430°C for 4 hours in a box-type resistance heating wire ...
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