Search

CN-120838869-B - Drawing process of metal wire

CN120838869BCN 120838869 BCN120838869 BCN 120838869BCN-120838869-B

Abstract

The invention discloses a drawing process of a metal wire rod, and relates to the technical field of metal wire rod treatment. The metal wire drawing process comprises polishing, acid washing, phosphating and drawing of the metal wire to be treated, wherein a specific phosphating agent ammonium polyphosphate is adopted in the phosphating process, a staged phosphating process is adopted, an activating agent is assisted to sequentially deposit a first phosphating layer with high compactness and a second phosphating layer with lower compactness on the surface of the metal wire, the wear resistance of the surface of the metal wire is enhanced, the adhesion of a lubricant film layer is facilitated, the metal wire passes through a lubricant with specific components in the drawing process, the corrosion resistance and the water oxygen erosion resistance of the metal wire are further enhanced, the obvious effect on preventing the metal wire from rusting is achieved, and in addition, a low-hardness antiwear agent and talcum powder with soft texture are combined in the lubricant, so that a better lubricating effect can be provided, and the drawing efficiency of the metal wire is improved.

Inventors

  • SHEN JIANFENG
  • GU CHAO

Assignees

  • 浙江丰成智造股份有限公司

Dates

Publication Date
20260508
Application Date
20250620

Claims (8)

  1. 1. A drawing process of a metal wire, characterized in that the drawing process of the metal wire comprises the steps of: s1, mechanically polishing a metal wire to be treated to remove a surface oxide layer; s2, immersing the metal wire into acid liquor, and controlling the metal wire to move and rinse; s3, immersing the metal wire rod processed in the step S2 into a phosphating pool for phosphating treatment, and standing; s4, enabling the metal wire subjected to phosphating in the step S3 to pass through a lubricant, then penetrating into a wire drawing die, carrying out drawing treatment, and extending out from the other end of the wire drawing die to finish primary drawing; s5, repeating the step S4 until a finished metal wire is drawn, cleaning the surface of the finished metal wire, and finishing the drawing treatment of the metal wire; in the step S3, the phosphating agent in the phosphating tank comprises ammonium polyphosphate; in the step S3, the phosphating treatment is performed in two stages, which specifically includes: Adding water into the phosphating pool, adding acid liquor to adjust the pH value to 2-3, immersing the metal wire into the phosphating pool, standing for 3-5 min, adding ammonium polyphosphate and an activating agent, wherein before the phosphating reaction, the concentration of the ammonium polyphosphate is 10-16 g/L, the concentration of the activating agent is 0.4-0.8 g/L, and carrying out phosphating reaction at 75-85 ℃ for 14-20 min, and taking out the metal wire to form a first phosphating layer on the surface of the metal wire; And in the second stage of phosphating treatment, the pH value of the liquid in the phosphating tank is regulated to 3.3-4.6, the concentration of ammonium polyphosphate is 5-10 g/L, the metal wire is immersed in the phosphating tank again, ammonium polyphosphate is added, the phosphating reaction is carried out again for 25-35 min at 55-60 ℃, the metal wire is taken out, and a second phosphate layer is formed on the surface of the metal wire.
  2. 2. The drawing process of metal wires according to claim 1, wherein in the step S3, the activator is at least one selected from the group consisting of sodium nitrite, sodium nitrate, hydrogen peroxide, manganese nitrate, sodium fluorosilicate, and zinc chloride.
  3. 3. The drawing process of a metal wire rod according to claim 1, wherein in the step S4, the lubricant comprises the following raw materials in parts by weight: 10-25 parts of zinc stearate; 2-4 parts of imidazolyl and/or pyridyl modified siloxane; 20-35 parts of wear-resistant agent; 10-30 parts of talcum powder; 0.8-1.5 parts of silane coupling agent; 2-3 parts of pentafluorophenyl acrylate; 30-50 parts of epoxy resin.
  4. 4. A drawing process of a metal wire rod as defined in claim 3, wherein in the lubricant, the wear-resistant agent is at least one selected from the group consisting of calcium carbonate, white carbon black, barium sulfate, calcium titanate, and aluminum hydroxide; And the particle size of the wear-resistant agent is 10-100 mu m.
  5. 5. The drawing process of a metal wire rod as set forth in claim 4, wherein the lubricant is prepared by a process comprising the steps of: mixing the wear-resistant agent, talcum powder, silane coupling agent and imidazolyl and/or pyridyl modified siloxane according to the proportion, stirring for 0.5-1 h at 60-70 ℃, and then adding the rest raw materials, and uniformly mixing to obtain the lubricant.
  6. 6. A metal wire drawing process according to claim 1, wherein in the step S4, the residence time of the metal wire is 0.5min to 3min when the metal wire passes through the lubricant, And the temperature of the lubricant is 80-95 ℃.
  7. 7. The drawing process of the metal wire rod according to claim 1, wherein in the step S4 and the step S5, the pass deformation of the metal wire rod in the drawing process is 8% -15%; And/or the drawing temperature of the metal wire rod in the drawing process is 120-200 ℃.
  8. 8. The drawing process of a metal wire rod according to claim 1, wherein the metal wire rod is made of one selected from the group consisting of iron, aluminum, iron-based alloy and aluminum-based alloy.

Description

Drawing process of metal wire Technical Field The invention relates to the technical field of metal wire treatment, in particular to a drawing process of a metal wire. Background In the process of drawing a metal wire, a lubricant layer on the surface of the metal wire is an important factor for ensuring that the metal wire can be normally drawn, and along with the continuous development of the technology for preparing steel wires and steel strands by drawing the metal wire, the technology for carrying out phosphating surface treatment on the metal wire before drawing is rapidly developed, wherein phosphating is a chemical reaction process of reacting a metal wire matrix with dilute phosphoric acid or acid phosphate to form a phosphate protection film. At present, the phosphating process is divided into dipping phosphating, online continuous phosphating and electrolytic phosphating, and is essentially to interact a metal matrix with phosphating liquid and form a crystalline layer phosphating film on the surface of the metal matrix. The film forming effect of the phosphating treatment process in the related technology and the lubricating effect of the lubricant in the drawing process are still not ideal, so that the abrasion condition of the metal wire in the drawing process is serious. Disclosure of Invention The invention aims to develop a drawing process of a metal wire, which has the advantages of greatly improving the film forming effect of a phosphating layer on the surface of the metal wire, improving the scratch resistance of the metal wire, improving the lubricity of the surface of the metal wire, reducing the friction coefficient between a die and a steel wire to be drawn, reducing the friction force and improving the drawing efficiency. In order to achieve the above object, the present invention provides a drawing process of a metal wire, comprising the steps of: s1, mechanically polishing a metal wire to be treated to remove a surface oxide layer; s2, immersing the metal wire into acid liquor, and controlling the metal wire to move and rinse; s3, immersing the metal wire rod processed in the step S2 into a phosphating pool for phosphating treatment, and standing; s4, enabling the metal wire subjected to phosphating in the step S3 to pass through a lubricant, then penetrating into a wire drawing die, carrying out drawing treatment, and extending out from the other end of the wire drawing die to finish primary drawing; s5, repeating the step S4 until a finished metal wire is drawn, cleaning the surface of the finished metal wire, and finishing the drawing treatment of the metal wire; in the step S3, the phosphating agent in the phosphating tank includes ammonium polyphosphate. In one embodiment, in the step S3, the phosphating treatment is performed in two stages, specifically including: adding water into the phosphating pool, adding acid liquor to adjust the pH value to 2-3, immersing the metal wire into the phosphating pool, standing for 3-5 min, adding ammonium polyphosphate and an activating agent, carrying out phosphating reaction at 75-85 ℃ for 14-20 min, and taking out the metal wire, wherein a first phosphating layer is formed on the surface of the metal wire; and in the second stage of phosphating treatment, regulating the pH value of the liquid in the phosphating tank to 3.3-4.6, immersing the metal wire in the phosphating tank again, adding ammonium polyphosphate, carrying out phosphating reaction again at 55-60 ℃ for 25-35 min, and taking out the metal wire, wherein a second phosphate layer is formed on the surface of the metal wire. In an embodiment, in the step S3, before the phosphating reaction in the first stage, the concentration of the ammonium polyphosphate is 10g/L to 16g/L, and the concentration of the activator is 0.4g/L to 0.8g/L. In one embodiment, in the step S3, the concentration of the ammonium polyphosphate is 5g/L to 10g/L before the phosphating reaction in the second-stage phosphating process. In an embodiment, in the step S3, the activator is at least one selected from sodium nitrite, sodium nitrate, hydrogen peroxide, manganese nitrate, sodium fluosilicate and zinc chloride. In an embodiment, in the step S4, the lubricant includes the following raw materials in parts by weight: 10 to 25 parts of zinc stearate, 2 to 4 parts of imidazolyl and/or pyridyl modified siloxane, 20 to 35 parts of wear-resistant agent, 10 to 30 parts of talcum powder, 0.8 to 1.5 parts of silane coupling agent, 2 to 3 parts of pentafluorophenyl acrylate and 30 to 50 parts of epoxy resin. In one embodiment, the wear-resistant agent is at least one selected from calcium carbonate, white carbon black, barium sulfate, calcium titanate and aluminum hydroxide, and the particle size of the wear-resistant agent is 10-100 μm. In one embodiment, the lubricant is prepared by the steps of: mixing the wear-resistant agent, talcum powder, silane coupling agent and imidazolyl and/or pyridyl modified siloxane