Cable braid shielded aluminum-magnesium alloy wire and production method thereof
Technical field
The present invention relates to cable the braid shielded aluminum-magnesium alloy wire and the production method thereof of concentric cable industries such as a kind of CATV of being widely used in.
Technical background
The braid of CATV concentric cable is originally the employing tinned copper wire, and, anti-couple-corrosion low because of aluminum-magnesium alloy wire light specific gravity, cost and recovery value be low can to prevent characteristics such as pilferage, is replacing tinned copper wire gradually.Production cable braid shielded is such with the proportioning raw materials of aluminum-magnesium alloy wire at present: it comprises that magnesium 3.2-3.9%, chromium 0.15-0.35%, surplus are aluminium, chromium combines with elements such as magnaliums as a kind of main reinforcement element, can improve intensity of aluminum alloy, corrosion-resistant, antirust and make product surface gloss; But the aluminum-magnesium alloy wire of proportioning like this, its resistivity≤0.05388 Ω mm in the time of 20 ℃
2/ m can meet domestic standard, also has distance with international standard.Its existing production method is: melting-first pulling shaping-thermal treatment-rough-in draw-thermal treatment-carefully draw-multifilament-check warehouse-in.Adopt the aluminum-magnesium alloy wire of this explained hereafter, its pull-off force and elongation at break are all not ideal enough.
Summary of the invention
Resistivity when the purpose of this invention is to provide a kind of 20 ℃≤0.051 Ω mm
2The cable braid shielded aluminum-magnesium alloy wire of/m, and the production method that this cable braid shielded is significantly improved with the pull-off force and the elongation at break of aluminum-magnesium alloy wire.
For achieving the above object, cable braid shielded aluminum-magnesium alloy wire of the present invention contains weight percent magnesium 3.2-3.9%, chromium 0.15-0.35%, surplus is an aluminium, and it also contains boron 0.1-0.5%.
The content of described boron is 0.25-0.3%.
The cable braid shielded with the technical process of the production method of aluminum-magnesium alloy wire is: melting-first pulling shaping-thermal treatment-rough-in draw-thermal treatment-carefully draw-multifilament-check warehouse-in, to be furnished with the raw material of boron and produce, and carefully draw and adopt the tubular type annealing process of monitoring automatically after the operation by described flow process.
The tubular type annealing process of described automatic monitoring is that the silk volume is annealed through the tubular type annealing furnace from paying out machine, by time and the temperature in the automatic monitored control system control annealing process, again through being around on the take-up reel of wire coiler after the anti-oxidation processing.
Adopt the cable braid shielded aluminum-magnesium alloy wire of proportioning of the present invention, its resistivity≤0.051 Ω mm in the time of 20 ℃
2/ m reaches external similar advanced product level; The cable braid shielded aluminum-magnesium alloy wire that adopts the inventive method to produce, pull-off force 〉=5.1N, elongation at break 〉=10%.
Embodiment
Embodiment one: magnesium 3.5%, chromium 0.15%, boron 0.3%, surplus are that the proportioning of aluminium is got the raw materials ready by weight percentage, through melting-first pulling shaping-thermal treatment-rough-in draw-thermal treatment-carefully draw, the silk that carefully draws the back to form is involved in tubular type annealing operation into automatic monitoring.In this technology, use the tubular type annealing device of monitoring automatically, this equipment has paying out machine, the tubular type annealing furnace, wire coiler and supervisory system, silk package after carefully drawing is on paying out machine, supervisory system is set annealed time and temperature, when rotating speed during in the speed that 800-1000 changes, temperature is controlled at 380-430 ℃, described tubular type annealing furnace upper end is provided with cleaning surface, the lower end is provided with the oxidation inhibitor groove and the tubular type annealing furnace is positioned at the same inclined-plane that is provided with by 110-130 ° of inclination angle, the alloy silk from the paying out machine through guide wheel, after cleaning, cleaning surface enters the tubular type annealing furnace, the alloy silk that enters annealing furnace is in a kind of vacuum state environment of anaerobic, with controlled oxidation, the alloy silk of pulling out from annealing furnace passes through anti-oxidation processing, and then the alloy silk is wound on the take-up reel of wire coiler through guide wheel, and take-up reel is taken off back check warehouse-in.The cable braid shielded aluminum-magnesium alloy wire that present embodiment is produced, the resistivity in the time of 20 ℃ is 0.049 Ω mm
2/ m, pull-off force 5.41N, elongation at break reach 12%.And the U.S. flies the resistivity of like product in the time of 20 ℃ of Buddhist company is 0.050 Ω mm
2/ m, elongation at break are 3%.The technological standard of the product of present embodiment production has surpassed the technological standard of external similar advanced product.
Embodiment two: percentage magnesium 3.5%, chromium 0.2% by weight, and boron 0.25%, surplus are that the proportioning of aluminium is got the raw materials ready, and produce by embodiment one described method, the resistivity that obtains in the time of 20 ℃ is 0.049 Ω mm
2/ m, pull-off force 5.41N, elongation at break reach 12% cable braid shielded aluminum-magnesium alloy wire.
Embodiment three: magnesium 3.7%, chromium 0.2%, boron 0.1%, surplus are that the proportioning of aluminium is got the raw materials ready by weight percentage, produce by embodiment one described method, and the resistivity that obtains in the time of 20 ℃ is 0.051 Ω mm
2/ m, pull-off force 5.41N, elongation at break reach 12% cable braid shielded aluminum-magnesium alloy wire.
Embodiment four: magnesium 3.2%, chromium 0.35%, boron 0.5%, surplus are that the proportioning of aluminium is got the raw materials ready by weight percentage, produce by embodiment one described method, and the resistivity that obtains in the time of 20 ℃ is 0.051 Ω mm
2/ m, pull-off force 5.41N, elongation at break reach 12% cable braid shielded aluminum-magnesium alloy wire.