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Low temperature fast phosphating solution for drawing wire and its phosphating process

A phosphating solution and low-temperature technology, which is applied in the coating process of metal materials, etc., can solve the problems that the wire drawing production line cannot be subjected to medium-high temperature soaking and phosphating treatment, the lubricating performance between the wire rod and the mold is reduced, and the wire is broken during drawing. Achieve good effect, good environmental performance, and reduce usage

Inactive Publication Date: 2007-06-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resistance butt welding process will completely destroy the phosphating film on the surface of the wire rod, greatly reducing the lubrication performance between the wire rod and the mold during the wire drawing process, resulting in transverse cracks on the surface of the welding area of ​​the steel wire after drawing, and even wire breakage during drawing. At the same time, it will also induce the phenomenon of strand breakage
[0005] Due to the fast pace of the modern production process (only about 15 minutes for phosphating in actual production), at the same time, medium and high temperature immersion phosphating cannot be carried out on the wire drawing production line

Method used

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  • Low temperature fast phosphating solution for drawing wire and its phosphating process

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Embodiment 1

[0029] A low-temperature rapid phosphating solution for wire drawing, including Zn(H 2 PO 4 ) 2 , Zn(NO 3 ) 2 , H 3 PO 4 , HAS, La(NO 3 ) 3 and H 2 O, its mass ratio is: Zn(H 2 PO 4 ) 2 : Zn(NO 3 ) 2 :H 3 PO 4 :HAS:La(NO 3 ) 3 :H 2 O=65:60:8:5:0.5:861.5. It is used for phosphating of welding area of ​​1860MPa grade PC steel strand, the ambient temperature is 0°C, after phosphating for 7 minutes, the film weight after phosphating is 5g / m 2 , There is no transverse crack on the surface of the steel wire, and the broken wire caused by surface defects during the stranding process is basically eliminated.

Embodiment 2

[0031] A low-temperature rapid phosphating solution for wire drawing, including Zn(H 2 PO 4 ) 2 , Zn(NO 3 ) 2 , H 3 PO 4 , HAS, La(NO 3 ) 3 and H 2 O, its mass ratio is: Zn(H 2 PO 4 ) 2 : Zn(NO 3 ) 2 :H 3 PO 4 :HAS:La(NO 3 ) 3 :H 2 O=55:50:6:5:0.5:873.5. It is used for phosphating of welding area of ​​1860MPa grade PC steel strand, the ambient temperature is 5°C, after phosphating for 7 minutes, the film weight after phosphating is 5g / m 2 , There is no transverse crack on the surface of the steel wire, and the broken wire caused by surface defects during the stranding process is basically eliminated.

Embodiment 3

[0033] A low-temperature rapid phosphating solution for wire drawing, including Zn(H 2 PO 4 ) 2 , Zn(NO 3 ) 2 , H 3 PO 4 , HAS, La(NO 3 ) 3 and H 2 O, its mass ratio is: Zn(H 2 PO 4 ) 2 : Zn(NO 3 ) 2 :H 3 PO 4 :HAS:La(NO 3 ) 3 :H 2 O=50:50:5:6:0.5:888.5. It is used for phosphating of welding area of ​​1860MPa grade PC steel strand, the ambient temperature is 10°C, after phosphating for 7 minutes, the film weight after phosphating is 6g / m2 , There is no transverse crack on the surface of the steel wire, and the broken wire caused by surface defects during the stranding process is basically eliminated.

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Abstract

The present invention discloses a kind of low temperature fast phosphatizing solution for treating the welded area in drawn high carbon coil rod and its phosphatizing process. The low temperature fast phosphatizing solution of the present invention has lubrication on the welded area to avoid crack and breaking. The low temperature fast phosphatizing solution has hydroxylamine sulfate to replace traditional harmful NaNO2, and possesses environment friendship, high stability and long service period.

Description

technical field [0001] The invention relates to a formula and a phosphating process of a low-temperature rapid phosphating solution for wire drawing on the surface of steel wire rods, which are mainly used in the metal product industry. Background technique [0002] Due to its deformability, zinc-based phosphating film is often used for surface lubrication treatment during machining. Traditionally, it is generally prepared by medium and high temperature soaking process, and the formed phosphating film is thick (5-15g / m 2 ) and relatively dense, with good lubricating properties. [0003] As a new generation of building materials, prestressed (PC) steel strands for high-strength concrete are widely used in modern buildings such as high-rise buildings and long-span bridges. Its general production process is that the cold-controlled hot-rolled high-carbon wire rod is processed by high-temperature surface phosphating, then continuous multi-pass wire drawing production, and then...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/13C23C22/78
Inventor 方峰蒋建清董岩邵起越涂益友马驰
Owner SOUTHEAST UNIV
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