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CN-121992232-A - Method for producing 6013 aluminum alloy wire rod by continuous casting and rolling process and 6013 aluminum alloy wire rod

CN121992232ACN 121992232 ACN121992232 ACN 121992232ACN-121992232-A

Abstract

The invention relates to the technical field of aluminum alloy wire processing, and discloses a method for producing 6013 aluminum alloy wires by a continuous casting and rolling process. The method comprises the steps of smelting an aluminum liquid with the aluminum content of not less than 99.70% at 700-760 ℃, adding aluminum-manganese alloy, aluminum-chromium alloy, aluminum-silicon alloy, copper, magnesium and aluminum-titanium alloy for alloying, then carrying out melt purification treatment in a furnace, online degassing and refining filtration, and carrying out continuous casting, face milling, homogenization heating, rough rolling, finish rolling, online atomization quenching and coiling. The prepared 6013 aluminum alloy wire has good surface quality, high geometric dimensional accuracy, diameter deviation within +/-0.5 mm, fluctuation of tensile strength within 60MPa, good elongation and fluctuation less than 4%, stable product quality and high production efficiency, and the continuous length of the finished product roll is 5300 meters per roll, so that continuous production of a small-sized extruder, a drawing machine and the like can be realized, and the yield is high.

Inventors

  • Fu Shirong
  • MU QUNHUA
  • YANG YAWEI
  • HE DONGYANG
  • LI JIAN
  • ZHANG MENG
  • YANG JUNHUA
  • WU MINGZU

Assignees

  • 云南铝业股份有限公司

Dates

Publication Date
20260508
Application Date
20260122

Claims (10)

  1. 1. A method for producing 6013 aluminum alloy wires by continuous casting and rolling process, which is characterized by comprising the following steps: S1, smelting an aluminum liquid, namely controlling the aluminum content to be not lower than 99.70 percent and controlling the temperature to be 700-760 ℃; S2, alloying the aluminum liquid, namely adding aluminum-manganese alloy, aluminum-chromium alloy, aluminum-silicon alloy, copper, magnesium and aluminum-titanium alloy into the aluminum liquid of S1, wherein the aluminum liquid after alloying comprises the following components in percentage by weight of 0.6-1.0% of Si, less than or equal to 0.5% of Fe, 0.6-1.1% of Cu, 0.8-1.2% of Mg, 0.2-0.8% of Mn, 0.03-0.09% of Cr, 0.02-0.12% of Ti and less than or equal to 0.05% of other single elements; s3, purifying the melt in the furnace, namely performing powder spraying refining on the alloyed aluminum liquid, and removing slag after finishing; s4, carrying out online degassing, refining and filtering on the aluminum liquid after slag removal, namely carrying out online degassing, grain refining and filtering on the aluminum liquid; s5, continuously casting aluminum liquid, namely pouring the aluminum liquid treated in the step S4 into a crystallizer, and continuously casting into an aluminum blank; S6, milling edges of the aluminum blank, namely milling the surface of the aluminum blank obtained in the S5 to remove an oxide layer; s7, reheating the aluminum blank, namely homogenizing and reheating the aluminum blank subjected to edge milling; S8, rough rolling of the aluminum billet, namely performing multi-pass rough rolling on the reheated aluminum billet; s9, aluminum billet finish rolling, namely performing multi-pass finish rolling on the rough rolled blank to obtain an aluminum alloy wire rod; s10, wire rod quenching, namely performing online atomization quenching on the finish-rolled wire rod; S11, coiling, namely coiling the quenched wire rod into a coil.
  2. 2. The method according to claim 1, wherein in step S2, aluminum manganese alloy containing 20wt% of manganese, aluminum chromium alloy containing 20wt% of chromium, aluminum silicon alloy containing 15wt% of silicon and oxygen-free copper wire blank are added, and left stand for more than 20min, and then magnesium metal and aluminum titanium alloy containing 10wt% of titanium are added.
  3. 3. The method according to claim 1, wherein in the step S4, a double-rotor degassing device is adopted for on-line degassing to reduce the hydrogen content of aluminum liquid to below 0.20 mg/100ml, a combined refiner of AlTi5B1 aluminum titanium boron wires and aluminum lanthanum wires is added for grain refinement, and the filtering is carried out by adopting a 40ppi ceramic filter plate and a 60ppi ceramic filter plate to be installed in a filter box for primary filtering and secondary filtering, and adopting a 25ppi ceramic filter plate to be installed in a middle ladle for tertiary filtering.
  4. 4. The method according to claim 1, wherein in the step S5, the crystallizer is a crystallization cavity formed by wrapping a copper liner and a steel belt, the fluctuation of the casting liquid level in the casting process is controlled to be 0 mm-5 mm, and the casting speed is controlled to be 5 t/h-6.5 t/h.
  5. 5. The method according to claim 1, wherein in step S6, a continuous edge milling machine is used for the face milling.
  6. 6. The method according to claim 1, wherein in step S7, the aluminum billet is reheated using an intermediate frequency induction furnace.
  7. 7. The method according to claim 1, wherein in step S8, the rough rolling is performed by four-pass rolling using a two-pass rolling mill, and in step S9, the finish rolling is performed by six-pass continuous rolling using a three-pass rolling mill.
  8. 8. The method according to claim 1, wherein in step S10, the wire rod is quenched with atomized water at a cooling rate of not less than 100 ℃ per second.
  9. 9. 6013 Aluminum alloy wire prepared by the method according to any one of claims 1 to 8, wherein the 6013 aluminum alloy wire has a smooth surface, no cracks, no burrs, no peeling defects, and a single roll continuous length of not less than 5300 meters.
  10. 10. The 6013 aluminum alloy wire according to claim 9, wherein the 6013 aluminum alloy wire has a diameter deviation within ±0.5mm, a tensile strength of 380mpa to 440mpa, and an elongation of 5% to 8%.

Description

Method for producing 6013 aluminum alloy wire rod by continuous casting and rolling process and 6013 aluminum alloy wire rod Technical Field The invention relates to the technical field of aluminum alloy wire processing, in particular to a method for producing 6013 aluminum alloy wire by a continuous casting and rolling process and the 6013 aluminum alloy wire. Background 6013 Aluminum alloy is one of the most advanced aluminum alloys in the world today, has a series of properties of excellent formability (casting property, plastic formability, weldability), medium specific strength, good corrosion resistance, superior damage tolerance, excellent heat exposure stability and the like, and has important application background in the fields of large civil aircraft, military carrier aircraft, rail transit and the like. The domestic 6013 is mainly produced by semi-continuous direct water-cooling casting (DC CASTING), the product length is limited (less than or equal to 15 meters), the large difference between the surface of the wire rod and the core structure leads to large performance deviation, a downstream manufacturer needs to be provided with a large-scale extruder, the requirement on the skill level of operators is high, the product quality difference of different operators is large, and the stability is poor. Disclosure of Invention The invention aims to overcome the defects in the prior art and provides a method for producing 6013 aluminum alloy wires by adopting a continuous casting and rolling process. In a first aspect of the present invention, there is provided a method for producing 6013 aluminum alloy wire by continuous casting and rolling process, comprising the steps of: S1, smelting an aluminum liquid, namely controlling the aluminum content to be not lower than 99.70 percent and controlling the temperature to be 700-760 ℃; S2, alloying the aluminum liquid, namely adding aluminum-manganese alloy, aluminum-chromium alloy, aluminum-silicon alloy, copper, magnesium and aluminum-titanium alloy into the aluminum liquid of S1, wherein the aluminum liquid after alloying comprises the following components in percentage by weight of 0.6-1.0% of Si, less than or equal to 0.5% of Fe, 0.6-1.1% of Cu, 0.8-1.2% of Mg, 0.2-0.8% of Mn, 0.03-0.09% of Cr, 0.02-0.12% of Ti and less than or equal to 0.05% of other single elements; s3, purifying the melt in the furnace, namely performing powder spraying refining on the alloyed aluminum liquid, and removing slag after finishing; s4, carrying out online degassing, refining and filtering on the aluminum liquid after slag removal, namely carrying out online degassing, grain refining and filtering on the aluminum liquid; s5, continuously casting aluminum liquid, namely pouring the aluminum liquid treated in the step S4 into a crystallizer, and continuously casting into an aluminum blank; S6, milling edges of the aluminum blank, namely milling the surface of the aluminum blank obtained in the S5 to remove an oxide layer; s7, reheating the aluminum blank, namely homogenizing and reheating the aluminum blank subjected to edge milling; S8, rough rolling of the aluminum billet, namely performing multi-pass rough rolling on the reheated aluminum billet; s9, aluminum billet finish rolling, namely performing multi-pass finish rolling on the rough rolled blank to obtain an aluminum alloy wire rod; s10, wire rod quenching, namely performing online atomization quenching on the finish-rolled wire rod; S11, coiling, namely coiling the quenched wire rod into a coil. Further, in the step S2, firstly adding 20wt% of manganese-containing aluminum-manganese alloy, 20wt% of chromium-containing aluminum-chromium alloy, 15wt% of silicon-containing aluminum-silicon alloy and up-drawing an oxygen-free copper wire blank, standing for more than 20min, removing surface scum, and then adding 10wt% of magnesium metal and titanium-containing aluminum-titanium alloy. In step S4, a double-rotor degassing device is adopted for online degassing, so that the hydrogen content of aluminum liquid is reduced to below 0.20 mg/100ml, a combined refiner of AlTi5B1 aluminum titanium boron wires and aluminum lanthanum wires is added for grain refining, a 40ppi ceramic filter plate and a 60ppi ceramic filter plate are arranged in a filter box for primary and secondary filtration, and a 25ppi ceramic filter plate is arranged in a middle ladle for tertiary filtration. In step S5, the crystallizer is a crystallization cavity formed by wrapping a copper lining and a steel belt, the fluctuation of the casting liquid level in the casting process is controlled to be 0 mm-5 mm, and the casting speed is controlled to be 5 t/h-6.5 t/h. Further, in step S6, a continuous edge milling machine is used for milling the surface. Further, in step S7, the aluminum billet is reheated by using an intermediate frequency induction furnace. Further, in step S8, the rough rolling is performed by adopting a double-roller mill for four-pass